Dimitrios Konstantinidis | International Hellenic University - IHU (original) (raw)

Papers by Dimitrios Konstantinidis

Research paper thumbnail of Application of the multi attribute utility theory for the selection of project procurement system for Greek highway projects

International Journal of Management and Decision Making, 2016

The selection of the appropriate procurement system (PS) for major highway projects in Greece is ... more The selection of the appropriate procurement system (PS) for major highway projects in Greece is central to their success, as the relevant interdependent interfaces and required contracts between stakeholders are numerous and complex. The PSs investigated are traditional, traditional fast track, design and build, private-public partnership, construction management, management contracts and partnering. The relevant selection criteria that were considered refer to the project characteristics, the needs of the awarding authority and the market conditions. A questionnaire survey was carried out in order to record the performance of each PS against each selection criterion. The survey succeeded in collecting responses from 91 international highway procurement experts. The paper then evaluated the mean ratings of each PS against each alternative selection criterion. These ratings were considered as marginal utility values for use in the multi attribute utility theory method. The weights of each selection criterion are calculated using the revised Simos method, the analytical hierarchy process and goal programming. Two pilot projects in Greece were defined as case studies, for the proposed methodology to be tested. The results showed that the public-private partnership system is frequently chosen as the most appropriate PS.

Research paper thumbnail of Cost Analysis and Material Consumption of Highway Bridge Underpasses

The paper presents the total cost and cost distribution for the construction of reinforced concre... more The paper presents the total cost and cost distribution for the construction of reinforced concrete bridge underpasses. The required material quantities of concrete, reinforcing steel, earthworks (excavation, soil improvement layer and backfilling), waterproofing works, joint formation and drainage system from 34 close box section and slab frame underpasses from recent highway projects in Greece, are statistically processed. An easy to apply cost estimating procedure for underpass bridges is proposed to assist stakeholders in the bridge construction industry when choosing the most cost effective design solution in order to reduce the risk of failure and loss of funding. In addition, accurate cost estimates give the project owner the capability to support funding applications from National and European sources.

Research paper thumbnail of Engineers' Perceptions of Contract Types' Performances for Highway Construction Projects

Advances in finance, accounting, and economics book series, 2017

Research paper thumbnail of Cost and Material Quantities Prediction Models for the Construction of Underground Metro Stations

Buildings

This paper addresses the gap in the scientific literature regarding construction cost estimates f... more This paper addresses the gap in the scientific literature regarding construction cost estimates for the construction of underground metro stations. It provides preliminary cost estimation models using linear regression for use by the Greek underground metro public transport authority for planning future extensions to the Athens and Thessaloniki networks. At the same time, it contributes to the body of knowledge by proposing material quantity prediction models and presents a two-stage preliminary cost estimation model for the construction of civil engineering works of underground metro stations. Stage one uses the construction cost budgets of six metro stations in Greece to develop a multilinear regression equation for the prediction of the overall cost for construction of civil engineering works; stage two provides estimates of material quantities using linear regression, key quantity ratios, and artificial neural networks. The data analyzed are from the prior measurements of quanti...

Research paper thumbnail of Egnatia Motorway bridge management systems for design, construction and maintenance

This paper presents the management systems employed by the client organization Egnatia Odos A.E. ... more This paper presents the management systems employed by the client organization Egnatia Odos A.E. (EOAE) responsible for the design, construction and maintenance of Egnatia Motorway’s bridges in Northern Greece. The management systems for the design phase, including procedures for the award of design contracts, internal review and external independent checking of the procured designs are discussed. For the supervision of bridge construction, EOAE enforces a strict quality control and quality assurance system, including application of relevant procedures and testing at every stage of construction. These, as well as the bridge maintenance program are also described. In addition, the project monitoring systems employed to provide immediate access to design information and facilitate effective planning of the works, as well as the Quality Assurance System used to ensure that the quality of the bridges meet state-of-the-art standards, are presented. whilst Metsovitikos and Votonosi Bridge...

Research paper thumbnail of Preliminary construction cost estimates for motorway underpass bridges

International Journal of Construction Management, 2017

ABSTRACT This paper presents the total cost and cost distribution between activities required for... more ABSTRACT This paper presents the total cost and cost distribution between activities required for the construction of reinforced concrete underpass bridges. The required material quantities of concrete, reinforcing steel, earthworks (excavation, soil improvement layer and backfilling), waterproofing works, joint formation and drainage system from 34 closed box section and slab frame underpasses from recent highway projects in Greece are statistically processed. Following analysis of this data, preliminary cost estimating formulae for underpass bridges are proposed based on the overpass deck surface area and a new parameter called the theoretical volume. The theoretical volume is a known value even at the preliminary stage of design as it is essentially the dimensions of the local road that must be realigned to underpass the motorway. It is suggested that the use of the proposed formulae will provide decsion-makers with accurate cost estimated of reinforced concrete motorway underpass bridges.

Research paper thumbnail of Choosing the Most Appropriate Contract Type for Compensating Major Highway Project Contractors

Research paper thumbnail of Analytical Model for Unconfined and Confined High Strength Concrete Under Cyclic Loading

Research paper thumbnail of Egnatia Motorway Concrete Bridges

Research paper thumbnail of Management of Designs for a Major Motorway Project

Research paper thumbnail of Seismic Evaluation of R/C Buildings Using High Performance Materials

The performance of reinforced concrete (R/C) buildings made of high performance materials (HPM) i... more The performance of reinforced concrete (R/C) buildings made of high performance materials (HPM) in seismic areas is evaluated through the parametric analysis of twenty-two buildings designed and detailed according to the current (prEN) version of Eurocode 8, for ductility classes (DC) ''Medium'' and ''High'', in combination with the current (prEN) version of Eurocode 2. Seismic assessment of the buildings is

Research paper thumbnail of Design of Twin Leaf Balanced Cantilever Bridges in Greece under Seismic Conditions

IABSE Symposium, Lisbon 2005: Structures and Extreme Events, 2005

Research paper thumbnail of Multispan Balanced Cantilever Bridges: Egnatia Motorway

IABSE Symposium, Shanghai 2004: Metropolitan Habitats and Infrastructure, 2004

... Xanthopoulos Mott MacDonald Ltd J/V PGIL-SALFO J/V Attikat ATE – Pantechniki AE – J&a... more ... Xanthopoulos Mott MacDonald Ltd J/V PGIL-SALFO J/V Attikat ATE – Pantechniki AE – J&P Avax AE – Empedos AE ... Xanthopoulos Mott MacDonald Ltd J/V PGIL-SALFO J/V Attikat ATE – Pantechniki AE – J&P Avax AE – Empedos AE ...

Research paper thumbnail of Engineers’ Perception of Contract Types’ Performance for Highway Construction Projects

International Journal of Applied Behavioral Economics, 2013

This research focuses on the evaluation of a factor analysis of engineers’ perceptions of the per... more This research focuses on the evaluation of a factor analysis of engineers’ perceptions of the performance of highway projects contract types’ (CTs’) against their respective selection criteria (SC) based on the results of a questionnaire survey. The SPSS database’s sample consisted of 91 engineers from Greece and abroad. Patterns of changes in engineers’ assessment of the CTs’ performance were noted and justified by comparing the factors’ content. Apart from the total sample, the analysis considered participants’ subgroups, such as Greek and foreign engineers, and experienced engineers in the private and public sector. Nationality and experience of participants influence the factors’ content. Moreover, a number of criteria tend to cluster together irrespective of CT and engineers’ profile. These pairs of criteria include all uncertainties’ criteria, Scope and Process Uncertainty, Contractual Difficulties and Claims, and finally Value for Money and Criticality of Schedule.

Research paper thumbnail of An empirical study of researchers' and practitioners' views on compensating major highway project contractors

International Journal of Management and Decision Making, 2013

ABSTRACT Choosing the most appropriate contract type (CT) for compensating major highway project ... more ABSTRACT Choosing the most appropriate contract type (CT) for compensating major highway project contractors is a decision that has to be taken by highway procurement authorities within their country’s legal, economic and social framework. The research carried out to date on the use of various CTs for the construction of infrastructure projects in general and for highway projects in particular is highlighted and utilised to determine the most frequently used CTs and the most commonly considered selection criteria (SC). The information obtained was included in a questionnaire survey that assessed the performance of each CT against each SC according to the perceptions of engineers with experience in highway procurement processes both in Greece and abroad. Ultimately, the initial results of the survey in comparison to the expectations resulting from the literature review are discussed.

Research paper thumbnail of Material Quantities for Balanced Cantilever Bridges

Research paper thumbnail of Selection Criteria Used for the Choice of Contract Type for Major Highway Construction Projects

Procedia - Social and Behavioral Sciences, 2012

Research paper thumbnail of Derivation of Utilities Values of Project Procurement Systems against Selection Criteria for Major Highway Construction Projects

In the project management process for the realization of major highway projects, the choice of Pr... more In the project management process for the realization of major highway projects, the choice of Project Procurement System (PPS) is central to success as the relevant social environments are numerous and with interdependent interfaces. An extensive literature review showed significant research into PPS selections models for building projects. The PPSs investigated are Traditional, Traditional Fast Track, Design and Build (D&B), Private Public Partnership (PPP), Construction Management (CM), Management Contracts and Partnering. Based on this literature review, the most common Selection Criteria (SC) considered when choosing a PPS were derived. A questionnaire was developed and distributed to experts in highway authorities in Europe and abroad to rate each PPS against these SC in order to determine their Utility Values (UV) to be employed in the Multi-Attribute Utility Analysis (MAUA) decision making methodology. The UV’s are in effect a relative measurement of the suitability of a certain CT for a given criterion. The purpose of this paper is to present the resulting UV of each PPS against each SC from the analysis of the collected data using SPSS 18 PASW software. The selected techniques employed include: estimation of the sample population mean, mode and standard deviation. In addition Pearson chi-square and Analysis of Variance (ANOVA) tests were carried out for inferential analysis between respondent’s characteristics and their ratings in order to determine any significant tendency towards specific responses. The results of these analyses are presented and discussed.

Research paper thumbnail of Analytical Formulation for Early Cost Estimation and Material Consumption of Road Overpass Bridges

Research Journal of Applied Sciences, Engineering and Technology, 2016

Research paper thumbnail of Complexity in the Evaluation of Contract Types Employed for the Construction of Highway Projects

Procedia - Social and Behavioral Sciences, 2013

ABSTRACT The procurement of public works is by definition complex in that its success depends on ... more ABSTRACT The procurement of public works is by definition complex in that its success depends on many varied interrelated parties (client, designer, licensing authorities, contractors, construction supervisor, users). In addition, the construction process is always technologically complex as it is comprised of numerous tasks and objectives. The choice of the most appropriate contract type (CT) regarding the method of contractor compensation is one of the most essential and complex decisions. This choice is based on the decision maker's knowledge, experience and intuition. Following an extensive literature review to determine both the seven CT's employed in the construction industry and the nine selection criteria (SC) most commonly considered when choosing between CT's, a questionnaire survey was carried out among 79 highway construction professionals who were asked to rate each CT against each selection criterion. This study presents the frequencies of the CTs scores against each criterion but the main aim of the research is to decompose the complex selection patterns relating to the participants’ choices. A correlation analysis carried out established associations among the respondents’ profiles and their resulting ratings of each CT against each SC. The results indicate that the participants’ origin, current position profile, years and type of professional experience and finally years of direct and indirect experience with each CT influence their perception of the appropriateness of each CT against each criterion and the respective scores awarded to each CT.

Research paper thumbnail of Application of the multi attribute utility theory for the selection of project procurement system for Greek highway projects

International Journal of Management and Decision Making, 2016

The selection of the appropriate procurement system (PS) for major highway projects in Greece is ... more The selection of the appropriate procurement system (PS) for major highway projects in Greece is central to their success, as the relevant interdependent interfaces and required contracts between stakeholders are numerous and complex. The PSs investigated are traditional, traditional fast track, design and build, private-public partnership, construction management, management contracts and partnering. The relevant selection criteria that were considered refer to the project characteristics, the needs of the awarding authority and the market conditions. A questionnaire survey was carried out in order to record the performance of each PS against each selection criterion. The survey succeeded in collecting responses from 91 international highway procurement experts. The paper then evaluated the mean ratings of each PS against each alternative selection criterion. These ratings were considered as marginal utility values for use in the multi attribute utility theory method. The weights of each selection criterion are calculated using the revised Simos method, the analytical hierarchy process and goal programming. Two pilot projects in Greece were defined as case studies, for the proposed methodology to be tested. The results showed that the public-private partnership system is frequently chosen as the most appropriate PS.

Research paper thumbnail of Cost Analysis and Material Consumption of Highway Bridge Underpasses

The paper presents the total cost and cost distribution for the construction of reinforced concre... more The paper presents the total cost and cost distribution for the construction of reinforced concrete bridge underpasses. The required material quantities of concrete, reinforcing steel, earthworks (excavation, soil improvement layer and backfilling), waterproofing works, joint formation and drainage system from 34 close box section and slab frame underpasses from recent highway projects in Greece, are statistically processed. An easy to apply cost estimating procedure for underpass bridges is proposed to assist stakeholders in the bridge construction industry when choosing the most cost effective design solution in order to reduce the risk of failure and loss of funding. In addition, accurate cost estimates give the project owner the capability to support funding applications from National and European sources.

Research paper thumbnail of Engineers' Perceptions of Contract Types' Performances for Highway Construction Projects

Advances in finance, accounting, and economics book series, 2017

Research paper thumbnail of Cost and Material Quantities Prediction Models for the Construction of Underground Metro Stations

Buildings

This paper addresses the gap in the scientific literature regarding construction cost estimates f... more This paper addresses the gap in the scientific literature regarding construction cost estimates for the construction of underground metro stations. It provides preliminary cost estimation models using linear regression for use by the Greek underground metro public transport authority for planning future extensions to the Athens and Thessaloniki networks. At the same time, it contributes to the body of knowledge by proposing material quantity prediction models and presents a two-stage preliminary cost estimation model for the construction of civil engineering works of underground metro stations. Stage one uses the construction cost budgets of six metro stations in Greece to develop a multilinear regression equation for the prediction of the overall cost for construction of civil engineering works; stage two provides estimates of material quantities using linear regression, key quantity ratios, and artificial neural networks. The data analyzed are from the prior measurements of quanti...

Research paper thumbnail of Egnatia Motorway bridge management systems for design, construction and maintenance

This paper presents the management systems employed by the client organization Egnatia Odos A.E. ... more This paper presents the management systems employed by the client organization Egnatia Odos A.E. (EOAE) responsible for the design, construction and maintenance of Egnatia Motorway’s bridges in Northern Greece. The management systems for the design phase, including procedures for the award of design contracts, internal review and external independent checking of the procured designs are discussed. For the supervision of bridge construction, EOAE enforces a strict quality control and quality assurance system, including application of relevant procedures and testing at every stage of construction. These, as well as the bridge maintenance program are also described. In addition, the project monitoring systems employed to provide immediate access to design information and facilitate effective planning of the works, as well as the Quality Assurance System used to ensure that the quality of the bridges meet state-of-the-art standards, are presented. whilst Metsovitikos and Votonosi Bridge...

Research paper thumbnail of Preliminary construction cost estimates for motorway underpass bridges

International Journal of Construction Management, 2017

ABSTRACT This paper presents the total cost and cost distribution between activities required for... more ABSTRACT This paper presents the total cost and cost distribution between activities required for the construction of reinforced concrete underpass bridges. The required material quantities of concrete, reinforcing steel, earthworks (excavation, soil improvement layer and backfilling), waterproofing works, joint formation and drainage system from 34 closed box section and slab frame underpasses from recent highway projects in Greece are statistically processed. Following analysis of this data, preliminary cost estimating formulae for underpass bridges are proposed based on the overpass deck surface area and a new parameter called the theoretical volume. The theoretical volume is a known value even at the preliminary stage of design as it is essentially the dimensions of the local road that must be realigned to underpass the motorway. It is suggested that the use of the proposed formulae will provide decsion-makers with accurate cost estimated of reinforced concrete motorway underpass bridges.

Research paper thumbnail of Choosing the Most Appropriate Contract Type for Compensating Major Highway Project Contractors

Research paper thumbnail of Analytical Model for Unconfined and Confined High Strength Concrete Under Cyclic Loading

Research paper thumbnail of Egnatia Motorway Concrete Bridges

Research paper thumbnail of Management of Designs for a Major Motorway Project

Research paper thumbnail of Seismic Evaluation of R/C Buildings Using High Performance Materials

The performance of reinforced concrete (R/C) buildings made of high performance materials (HPM) i... more The performance of reinforced concrete (R/C) buildings made of high performance materials (HPM) in seismic areas is evaluated through the parametric analysis of twenty-two buildings designed and detailed according to the current (prEN) version of Eurocode 8, for ductility classes (DC) ''Medium'' and ''High'', in combination with the current (prEN) version of Eurocode 2. Seismic assessment of the buildings is

Research paper thumbnail of Design of Twin Leaf Balanced Cantilever Bridges in Greece under Seismic Conditions

IABSE Symposium, Lisbon 2005: Structures and Extreme Events, 2005

Research paper thumbnail of Multispan Balanced Cantilever Bridges: Egnatia Motorway

IABSE Symposium, Shanghai 2004: Metropolitan Habitats and Infrastructure, 2004

... Xanthopoulos Mott MacDonald Ltd J/V PGIL-SALFO J/V Attikat ATE – Pantechniki AE – J&a... more ... Xanthopoulos Mott MacDonald Ltd J/V PGIL-SALFO J/V Attikat ATE – Pantechniki AE – J&P Avax AE – Empedos AE ... Xanthopoulos Mott MacDonald Ltd J/V PGIL-SALFO J/V Attikat ATE – Pantechniki AE – J&P Avax AE – Empedos AE ...

Research paper thumbnail of Engineers’ Perception of Contract Types’ Performance for Highway Construction Projects

International Journal of Applied Behavioral Economics, 2013

This research focuses on the evaluation of a factor analysis of engineers’ perceptions of the per... more This research focuses on the evaluation of a factor analysis of engineers’ perceptions of the performance of highway projects contract types’ (CTs’) against their respective selection criteria (SC) based on the results of a questionnaire survey. The SPSS database’s sample consisted of 91 engineers from Greece and abroad. Patterns of changes in engineers’ assessment of the CTs’ performance were noted and justified by comparing the factors’ content. Apart from the total sample, the analysis considered participants’ subgroups, such as Greek and foreign engineers, and experienced engineers in the private and public sector. Nationality and experience of participants influence the factors’ content. Moreover, a number of criteria tend to cluster together irrespective of CT and engineers’ profile. These pairs of criteria include all uncertainties’ criteria, Scope and Process Uncertainty, Contractual Difficulties and Claims, and finally Value for Money and Criticality of Schedule.

Research paper thumbnail of An empirical study of researchers' and practitioners' views on compensating major highway project contractors

International Journal of Management and Decision Making, 2013

ABSTRACT Choosing the most appropriate contract type (CT) for compensating major highway project ... more ABSTRACT Choosing the most appropriate contract type (CT) for compensating major highway project contractors is a decision that has to be taken by highway procurement authorities within their country’s legal, economic and social framework. The research carried out to date on the use of various CTs for the construction of infrastructure projects in general and for highway projects in particular is highlighted and utilised to determine the most frequently used CTs and the most commonly considered selection criteria (SC). The information obtained was included in a questionnaire survey that assessed the performance of each CT against each SC according to the perceptions of engineers with experience in highway procurement processes both in Greece and abroad. Ultimately, the initial results of the survey in comparison to the expectations resulting from the literature review are discussed.

Research paper thumbnail of Material Quantities for Balanced Cantilever Bridges

Research paper thumbnail of Selection Criteria Used for the Choice of Contract Type for Major Highway Construction Projects

Procedia - Social and Behavioral Sciences, 2012

Research paper thumbnail of Derivation of Utilities Values of Project Procurement Systems against Selection Criteria for Major Highway Construction Projects

In the project management process for the realization of major highway projects, the choice of Pr... more In the project management process for the realization of major highway projects, the choice of Project Procurement System (PPS) is central to success as the relevant social environments are numerous and with interdependent interfaces. An extensive literature review showed significant research into PPS selections models for building projects. The PPSs investigated are Traditional, Traditional Fast Track, Design and Build (D&B), Private Public Partnership (PPP), Construction Management (CM), Management Contracts and Partnering. Based on this literature review, the most common Selection Criteria (SC) considered when choosing a PPS were derived. A questionnaire was developed and distributed to experts in highway authorities in Europe and abroad to rate each PPS against these SC in order to determine their Utility Values (UV) to be employed in the Multi-Attribute Utility Analysis (MAUA) decision making methodology. The UV’s are in effect a relative measurement of the suitability of a certain CT for a given criterion. The purpose of this paper is to present the resulting UV of each PPS against each SC from the analysis of the collected data using SPSS 18 PASW software. The selected techniques employed include: estimation of the sample population mean, mode and standard deviation. In addition Pearson chi-square and Analysis of Variance (ANOVA) tests were carried out for inferential analysis between respondent’s characteristics and their ratings in order to determine any significant tendency towards specific responses. The results of these analyses are presented and discussed.

Research paper thumbnail of Analytical Formulation for Early Cost Estimation and Material Consumption of Road Overpass Bridges

Research Journal of Applied Sciences, Engineering and Technology, 2016

Research paper thumbnail of Complexity in the Evaluation of Contract Types Employed for the Construction of Highway Projects

Procedia - Social and Behavioral Sciences, 2013

ABSTRACT The procurement of public works is by definition complex in that its success depends on ... more ABSTRACT The procurement of public works is by definition complex in that its success depends on many varied interrelated parties (client, designer, licensing authorities, contractors, construction supervisor, users). In addition, the construction process is always technologically complex as it is comprised of numerous tasks and objectives. The choice of the most appropriate contract type (CT) regarding the method of contractor compensation is one of the most essential and complex decisions. This choice is based on the decision maker's knowledge, experience and intuition. Following an extensive literature review to determine both the seven CT's employed in the construction industry and the nine selection criteria (SC) most commonly considered when choosing between CT's, a questionnaire survey was carried out among 79 highway construction professionals who were asked to rate each CT against each selection criterion. This study presents the frequencies of the CTs scores against each criterion but the main aim of the research is to decompose the complex selection patterns relating to the participants’ choices. A correlation analysis carried out established associations among the respondents’ profiles and their resulting ratings of each CT against each SC. The results indicate that the participants’ origin, current position profile, years and type of professional experience and finally years of direct and indirect experience with each CT influence their perception of the appropriateness of each CT against each criterion and the respective scores awarded to each CT.