Behaviour of Prefabricated Modular Buildings Subjected to Lateral Loads (original) (raw)
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Behaviour of Multi-Storey Prefabricated Modular Buildings under seismic loads
Prefabricated Modular Buildings are increasingly becoming popular in the construction industry as a method to achieve financially economical buildings in a very short construction time. This increasing demand for modular construction has expanded into multi-storey applications where the effect of lateral loads such as seismic loads becomes critical. However, there is a lack of detailed scientific research that has explored the behaviour of modular buildings and their connection systems against seismic loads. This paper will therefore present the nonlinear time history analysis of a multi-storey modular building against several ground motion records. The critical elements that need special attention in designing a modular building in similar seismic conditions is discussed with a deeper explanation of the behaviour of the overall system.
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The limited knowledge of the behaviour of modular buildings subjected to different loading scenarios and thereby lack of design guidelines hinder the growth of modular construction practices despite its widespread benefits. In order to understand the robustness of modular building systems, a case study was carried out using the numerical analysis method to evaluate the robustness of ten-storey braced frame modular buildings with different modular systems. Two types of modules with different span lengths were used in the assessments. Then, three different column removal scenarios involving (1) removal of a corner column, (2) an edge column, and (3) an interior column were employed to assess the robustness of modular building cases considered. The forces generated in the elements in close proximity to the removed column were verified to assess the robustness of each building case analysed. The results showed that the change in damping ratio from 1% to 5% has no significant influence o...
Enhancing the lateral performance of modular buildings through innovative inter-modular connections
Structures, 2021
Steel modular constructions involve the manufacture of fully equipped three-dimensional prefabricated modules in factory-controlled settings which are then transported to construction sites and assembled to form a complete structure. Adjacent modules are attached to each other only at their corners at inter-modular connections. Typical inter-modular connections are incapable of providing resistance against lateral dynamics loads. Current research shows that under lateral dynamic loads, steel modular buildings with rigid unyielding connectors are vulnerable to failure of the columns which result in either partial or complete collapse of the structure. Modular systems would therefore require additional in-situ lateral load resisting systems, such as shear cores, which would devalue the benefits of purely modular construction as they would need to be built in-situ. To address this shortcoming, this research proposes a novel steel inter-modular connection, with two variations, to achieve safe, reliable and ductile dynamic performance of a modular building under seismic actions. An extensive experimental program was undertaken to study the feasibility of the strength hierarchy and expected ductile failure patterns of the newly proposed inter-modular connections under monotonic and cyclic lateral loads. The experimental study revealed that the proposed inter-modular connections display superior dynamic behaviour with respect to response parameters such as moment-carrying capacity, energy dissipation and ductility. Ductile failure patterns within the connection region and away from the columns, which are critical members, were observed. This information will contribute to the design of safe and efficient inter-modular connections and enable enhanced lateral performance of steel modular buildings under dynamic loads. A comprehensive numerical model of the connection was also developed and validated for use in future parametric studies.
Identification of structural issues in design and construction of multi- story modular buildings
As the modular construction industry tries to find new markets in multi-story buildings, additional challenges are faced along the way that needs to be addressed. This paper initially introduces different types of modular multi-story or high-rise construction systems. The structural systems including gravity and lateral load resisting systems are then discussed. The challenges that structural designers face in addressing load path continuity and gravity and lateral load transfer between adjacent structural components are reviewed. Approaches for system and building modeling needed for structural analysis as well as relevant building code requirements are discussed. Furthermore the challenges in design and detailing of different structural members and components/systems are evaluated. The paper also provides an overview of any special structural safety issues for design and construction. Finally, the paper outlines the R&D needs for advancing the technology of multi-story modular building design and construction.
Climate change analysts predict more typhoons and hurricanes will occur due to rising water temperatures, potentially causing damage to housing in areas not typically prone to severe weather. At the same time, the devastation wrought by earthquakes around the globe has raised awareness of the vulnerability of housing to seismic forces. Sustainable goals for housing structures include reducing the embodied energy in the materials used by choosing regional materials, using less material and choosing rapidly renewable materials. The combination of recurrent disasters in many localities combined with a need for sustainable solutions, drive the research of lateral force resistant replacement structures. This paper posits that the housing structures must be lateral load resistant, built from regionally manufactured materials, durable, low-maintenance and affordable. This paper will analyse and compare lateral-force resistant framing systems in concrete, recycled steel, timber and bamboo and discuss the feasibility of each for application in prefabricated single family residences.
IJERT-A Study on Behavior of Structural Systems for Tall Buildings Subjected To Lateral Loads
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/a-study-on-behavior-of-structural-systems-for-tall-buildings-subjected-to-lateral-loads https://www.ijert.org/research/a-study-on-behavior-of-structural-systems-for-tall-buildings-subjected-to-lateral-loads-IJERTV3IS070984.pdf This paper describes an investigation has been carried out to examine the most common structural systems that are used for reinforced concrete tall buildings under the action of gravity and wind loads. These systems include "Rigid Frame", "Shear Wall/Central Core", "Wall-Frame Interaction", and "Outrigger". The basic modeling technique and assumptions are made by "ETABS" Program, in 3-D modeling. Design considerations are made according to Indian Standards. This comparative analysis has been aimed to select the optimal structural system for a certain building height. The structural efficiency is measured by the time period, storey displacement, drift, lateral displacement, base shear values and core moments. The recommendations for each structural are based upon limiting the wind drift of the structure, and increasing the lateral stiffness. The achievement of structural system for tall buildings is not an easy task. Whereas building height increases the importance of lateral loads action rises in an accelerating rate. There are two types of lateral loads, wind and seismic loads. Wind load presents the most critical lateral loading for modern tall buildings, which have lightweight skeletons that cause uncomfortable horizontal movements for occupants. Also, wind is not constant either with height or with time and is not uniform over the sides of a building. So, windy weather creates a variety of problems in tall buildings, causing concern for buildings owner and engineers alike. Where, excessive vibration due to this load is a major obstacle in design and construction of a modern tall building. It should be limited to prevent both structural and non-structural damage.
Analysis of a High Rise Building Frame Considering Lateral Load Resisting Members: A Review
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING AND TECHNOLOGY (IJCIET)
The advancement of high strength structural materials just as the presentation of dominating improvement strategies gave a lift in the advancement of tall constructions. As the tallness of the construction builds, they become logically helpless against wind load and seismic burden. The resistance of tall constructions to horizontal burdens is the essential determinant in the detailing of new fundamental structural systems that create by the consistent undertakings of structural architects to continue expanding the structure tallness while keeping the redirection inside commendable purposes of restriction and restricting the proportion of materials. In this proposed work a logical investigation will be consider on such frameworks like outrigger framework with center shear divider and hex lattice frameworks, to decide their structural proficiency in moving the horizontal loads securely to the ground. In this investigation we are giving audit of researches identified with examination of tall building structures.
PERFORMANCE ASSESMENTOF TALL BUILDING UNDER LATERAL LOADING
TODAY TALL STRUCTURES PLAY A VERY IMPORTANT ROLE AND ARE PREFERRED DUE TO CONSTANT MIGRATION AND LIMITATION OF AVAILABLE LAND.THE EVOLUTION OF TALL BUILDING STRUCTURAL SYSTEMS BASED ON NEW CONCEPTS HAVE BEEN TOWARDS”STIFFNESS”,”LIGHTNESS” .FOR TALL STRUCTURES, SEVERAL STRUCTURAL SYSTEMS HAVE BEEN ADOPTED TO ACHIEVE MANKIND DREAMS IN PURSUING NEW HEIGHTS. THIS PRESENT PAPER DEMONSTRATES THE PERFORMANCE OF DIFFERENT BUILDINGSSTRUCTURESCONSIDERABLY(TUBE,DIAGRID,BUNDLED,CONVENTIONAL) REINFORCED CONCRETE MOMENT RESISTING FRAME(G+30) DESIGNED FOR GRAVITY AND SEISMIC USING NON LINEAR TIME HISTORY ANALYSIS (USING SAP 2000 V16 STRUCTURAL ANALYSIS SOFTWARE) IN THIS OVER TURNING MOMENT, STOREY DRIFTS, BASE SHEAR OF STRUCTURE AND OVER TURNING MOMENT WERE STUDIED AND RESULTS OBTAINED ARE COMPARED WITH THOSE OBTAINED FROM OTHER STRUCTURES.
Dynamic Response of Prefabricated Building Under Seismic Loading
International Journal of Engineering Applied Sciences and Technology
There are many new technologies arriving in the field of construction, one of those is prefabricated buildings which means the components or structural members of the building are cast in the factory and then fixed in the site. Although the technology developed many years back, in India, the implementation is improving in these days only. It is important to study the prefabricated building performance under seismic loading because the behavior of prefabricated concrete building is entirely different from the normal building. So, in the present investigation, a G+7 storey prefabricated building was taken into consideration to check the behavior and performance. The modeling of the building was done using TEKLA software and then it is analyzed using ETABS for the response spectrum analysis.