Comparative Analysis and Design of Regular and Irregular Building and its Behaviour at Different Earthquake Zone by Using Etabs and Rcdc Software (original) (raw)
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The Seybold Report, 2022
The modern reports and research showed that the buildings with more irregularity are less safe in facing earthquakes. This study aims to study the behavior of regular and irregular building in seismic matter. Three irregular shapes (L-Shaped, T-Shaped and C-Shaped) having two types of plan irregularity (accidental torsion and reentrant corner) were compared with rectangular regular one in three seismic hazards (Low, Moderate and High). ETABS v19 is used to model and analyze 12 different models with 15-story and 20-story RC frame structures using dynamic response spectrum method to obtain the maximum displacement, story drift, maximum drift and accidental torsion committing to ASCE7-10 code. The purpose of the study is to alleviate the seismic risk on the irregular structures and make our buildings safer, less cost and more Sustainable. at the end, we provide a table to guide the architectural engineers choosing the best building configuration based on the area seismicity and seismic hazard in order to match the purposes and the structural design in addition to provide some solutions to avoid structural design problems. The results were as follow: In the 15-story RCC frame structures with special moment resisting frame, the L-Shaped buildings are not safe to use in high seismic hazard areas, and the T-Shaped buildings are not safe to use in low and high seismic hazard areas. In the 20-story RCC structures with special moment resisting frame, the L-Shaped buildings are not safe to use in high seismic hazard areas, and the T-Shaped buildings are not safe to use in all seismic hazard areas. The comparison between the irregular shapes and regular one was predicted in L-Shaped and T-Shaped building which have worse seismic behavior than regular shape, but the comparison with C-Shaped was different, the C-Shaped gave a better behavior compared to the rectangular regular building.
IRJET, 2021
Multi storey Rc structure are most dangerous earthquake it was found that main reason for failure of Rc building is irregular distribution of mass and strength stiffness or due to irregular geometrical configuration. in reality many existing buildings contain irregularity due to functional and aesthetic requirements .However fast Aspects in formulating. the seismic methodology by the seismic codes (IS 1893-2002).The review of seismic design codes and reported research codes studied show that the Irregularity .The principal objectives of this project is to study the structural behaviour of multi story RC structure for different plan configuration such as rectangular building along with L-shape, C-shape, H-shape in according with seismic provisions code (IS 1893-2002) using ETABS Software. The analysis involved load calculation and analyzing the whole structure on the of dynamic analysis.ie Response spectrum analysis and time history analysis confirming to Indian standard code of practice .For time history analysis past earth quake ground motion record is taken to study the response of all the structure. These analysis are carried out by the different seismic zones(zone1 zone 2) .
Analysis and Design of Earthquake Resisting Building with Shear Walls by Using ETAB Software
International Journal For Multidisciplinary Research
The present study shows the seismic behaviour of buildings under the action of earthquake load by performing Non-linear Static analysis. Nowadays buildings with shear walls are more popular than buildings without shear walls in earthquake-prone areas due to their resistance during earthquakes. So, this study aims to find the prime location of the shear wall and then investigate the effectiveness of the best shear wall for the RCC structure. In this study, G+13 & G+5 RCC building is considered for the analysis under zone I to zone IV with suitable load combination. The structure is analyzed for earthquakes in the type of structural system using ETABS software. The shear wall starts from the foundation level and should continue throughout the building.
Neither the earthquake can be predicted nor it can be stopped as it is natural phenomenon. The only thing is effect of earthquake can be minimized. Earthquake itself is not vulnerable but the fragile and un-engineered structure cause the serious problems during earthquake. So to cope with this problem we need to take care for the construction of earthquake resistant construction. We can't construct earthquake proof structures as term engineering itself depicts economic i.e the project should be completed within the minimum budget including all the facilities. So we should think about minimizing the risk during such phenomenon. So the role of Civil/Structural engineers is to analyze and design of earthquake resistant structures. Here in India there are four seismic zones " zone II, zone III, zone IV and zone V". the paper aims to collect the information for design and analysis of buildings in different seismic zones and interpretation of the results obtained by ETABS software.
IRJET- Earthquake Behaviour of Irregular Building by Linear Static Analysis using ETABS
IRJET, 2020
India is prone to strong earthquake shaking and hence earthquake resistant design is essential. Seismic codes help the designer to improve the behavior of structures to withstand the earthquake effects without significant loss. The new IS 1893:2016 on Criteria for Earthquake resistant design of structures has included many changes like separate response spectra for Equivalent Linear static method and Response spectrum method for 6.0s period, Importance factor of 1.2 for residential buildings and new expression for Natural Time period for buildings with RC structural walls etc. This paper presents a case study in which seismic performance of a G+7 residential tower in zone III designed as per the earlier version of the code is checked for recommendations made by the revised code. Secondly this paper aims at the seismic load estimation and comparison for the multistory building designed as per IS 1893:2002 and IS 1893:2016 by Equivalent linear static method. Thirdly the effect of zone factor on the seismic performance of the building is studied as per IS 1893:2016 by Equivalent Linear Static method. The seismic behavior of the test building is evaluated using the structural software ETABS. The process gives a set of five individual analysis sequences for the building and the results are used to study the effect of changes made in the latest version of IS 1893.
Study of Seismic and Wind Effect on Multi-Storey R.C.C. Building using ETABS
IRJET, 2022
Nowadays, there are wide range of complicated and irregular structures that are analyzed and designed to resist the earthquake and wind load. This structures can be analyzed and designed by varied softwares like ETABS, STAAD Pro, TEKLA etc. Structural analysis is a branch that involves in determination of behavior of structures so as to predict the responses of various structural parts due to loading. Each structure is subjected to either one or combination of loads like gravity load, earthquake load and wind load. ETABS stands for Extended 3 Dimensional Analysis of Building System. ETABS software could be used for analysis of static, dynamic, linear and non-linear, etc. responses of structure and design of structures. In the present paper, effect of height of building on base shear, lateral force generated due to earthquake and wind load is evaluated using ETABS software. The study includes modelling and analysis of building by using ETABS software, and comparing wind load and earthquake load at different storeys. From the analysis, the minimum height of building at that the wind load dominates over earthquake load is discerned.
Seismic Analysis of Regular and Irregular Configuration of Building
As India is the fastest growing country across the globe and in need of shelter with higher land cost in major cities where horizontal expansion is not much possible due to space shortage. Thus, we are left with the solution of vertical expansion.In India basic need of people is not only structurally robust and aesthetically pleasing building but also economical building. To design these building best technology and best material are required.The analysis and design procedure adopted for the evaluation of multi-storey building(G+6) is based on the STAAD Pro. Software. The properties of structural elements are then optimized for the worst load case after a comparative study of reinforcement and concrete requirement for different load cases. Structural planning and design is an art and science of designing with economy andelegance, serviceable and durable structure. The entire process of structural planning and designing requires not only imagination and conceptual thinking but also sound knowledge of science of structural engineering besides knowledge of practical aspects, such as relevant design codes and byelaws backed up by example experience.The process of design commences with planning of structural primarily to meet thedefined as he is not aware of various implications involved in the process of planning and design. The functional requirements and aspects of aesthetics are locked into normally be the architect while the aspect of the safety, serviceability, durability and economy of the structure are attended by structural designer.
Comparative Analysis of RC Irregular Buildings Designed According to Different Seismic Design Codes
The Open Construction and Building Technology Journal, 2013
The present paper presents a comparison of seismic provisions of three seismic design codes, the Philippine code, Eurocode 8 and the American code, to the most common ordinary residential frames of standard occupancy. Regular and irregular reinforced concrete frames were analyzed and compared for four storey building types. The response spectrum and the seismic parameters of NSCP 2010 were considered for the horizontal load action with different load combinations. Response spectrum analysis and equivalent lateral force analysis were performed using SAP2000 software package. Five representative columns for each RC frame structure were analyzed. Based on the results of column axial load -bending moment interaction diagrams, EC8 was found to be conservative when compared to NSCP 2010 and 2009 IBC. The conclusion is that for the design and analysis of ordinary RC residential buildings with certain irregularity, EC8 provisions were considered to be safer.
COMPARATIVE STUDY OF REGULAR AND VERTICALLY IRREGULAR BUILDING UNDER SEISMIC LOADING.docx
It's a very big challenge that building or structure must withstand lateral forces such as earthquake and wind load. In the present work, the comparative analysis of various structures is performed using SAP 2000. The main aim of the project is comparative study of the stiffness of the structure by considering the three models that is Regular Structure, Plan irregular structure and Vertical irregular structure. All these three models are analyzed with static and dynamic earthquake loading for the Zones II, III, IV & V. The results are tabulated and graphs are plotted for displacement, drift, base shear and time period. Based on the results and discussion the structural behavior and stiffness is concluded for regular and irregular structures , among these structures regular structure shown maximum displacement and drift for all the zones in both static and dynamic analysis.
Seismic Analysis of a Multi-Storeyed Building with Irregular Plan Configuration Using ETABS
It is an attempt to investigate the effect of Irregular plan configuration for multistoried reinforced concrete building model.This paper mainly emphasizes on analysis of a multi-storey building (G+25) which is irregular both in plan and elevation. Modelling of 25 storeyed R.C.C. framed building is done on the ETABS v13.2.0 software for analysis. Post analyses of the structure such as Maximum Storey Displacement, Base Shear, Storey Drift, Maximum base reactions, Torsion and Over-turning moments are computed and then compared for all the analysed cases. ETABS is an engineering software product that caters to multi-story building analysis and design. ETABS stands for Extended Three dimensional Analysis of Building Systems. Basic or advanced systems under static or dynamic conditions may be evaluated using ETABS. Design of steel and concrete frames (with automated optimization), composite beams, composite columns, steel joists, and concrete and masonry shear walls is included, as is the capacity check for steel connections and base plates. ETABS provides an unequaled suite of tools for Structural Engineers designing buildings, whether they are working on one-story industrial structures or the tallest commercial high-rises.