Informatics Publishing Limited

Suchita Hirde ¹, Irshad Mullani ¹

Affiliations
1 Applied Mechanics Department, Government College of Engineering, Karad, 415124, (M.S.), IN

Abstract

The performance-based seismic design approach enable us to design new structures more economically and to assess existing structures more realistically. In addition, it is possible to develop and validate by advanced simulation innovative solutions that make step change improvements to the financial viability of a project. The reduced material consumption that results from the adoption of this approach also makes a positive contribution to the sustainability of new developments. The promise of performance-based seismic engineering is to produce structures with predictable seismic performance. Conventional ‘code based’ design is unsuitable for high-rise buildings as has been recognized in Japan and China for many years. Performance based seismic design explicitly evaluates how building is likely to perform in given potential hazard. In performance based design identifying and assessing performance capability of building in an integral part of design process, and guide the many decisions that must be made. Present study based on performance based seismic design synthesis and non-linear analysis of multi-storey RCC building. Performance based seismic design synthesis is an iterative process, begins with selection of performance objective followed by development of preliminary design, an assessment as to whether or not the design meets the performance objective and finally redesign and reassessment, if required until desired performance level is achieved. In this paper work will be carried out for performance based seismic design of multi-storey (G+5) RCC building. Once design is complete, non-linear analysis is carried out to study seismic performance then it’s compared with seismic performance of building designed with conventional code provisions.

Keywords

Performance Based Seismic Design, Non-Linear Analysis, Cost Effective Design.

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Suchita Hirde ¹, Rahul Aher ¹

Affiliations
1 Applied Mechanics Department, Govt. College of Engineering, Karad, 415124 (M.S.), IN

Abstract

Pushover analysis is a static, nonlinear procedure using simplified nonlinear technique to estimate seismic structural deformations. It is an incremental static analysis used to determine the force-displacement relationship, or the capacity curve, fora structure or structural element. Many buildings in the present scenario have irregular configuration both in plan and elevation. This in future may subject to devastating earthquake. In order to identify the most vulnerable among the models considered, pushover analysis is carried out. The analysis involves applying horizontal loads, in a prescribed pattern, to the structure incrementally, i.e. pushing the structure and plotting the total applied shear force and associated lateral displacement at each increment, until collapse condition. The intensity of the lateral load is slowly increased and the sequence of cracks, yielding, plastic hinge formation, and failure of various structural components is recorded. In this paper an attempt is made to study the seismic response of RC building with plan irregularities in terms of performance point and the effect of earthquake forces on multi story building frame with the help of pushover analysis. In the present study reinforced concrete framed buildings of irregular plan (according to IS 1893-2002) such as L shapes are analyzed and compared with regular plan(rectangular) with G+5 , G+10 and G+15 storied. The push over analysis of the building frame is carried out by using software SAP 2000.

Keywords

Pushover Analysis, Irregular Building, Performance Point, Capacity Curve.

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Suchita Hirde ¹, Dhananjay Rahangdale ¹

Affiliations
1 Applied Mechanics Department, Govt. College of Engineering, Karad, 415124 (M.S.), IN

Abstract

Now a day's floating columns are used in multi-story buildings in urban India. There are various uses of floating columns such as space for assembly hall, reception lobbies and parking purpose etc. Such features are highly undesirable in building built in seismically active areas. Due to discontinuity in load transfer path result in poor performance of building. In this paper an attempt is made to study the comparison of seismic performance of building with normal building and floating columns building for various seismic zones in case of medium soil. For this purpose Push over analysis is adopted to get performance point and hinge pattern in a multi-storey buildings. To achieve this objective, model of G+7 storey normal building and building with different locations of floating columns are analyzed and the base shear and displacement of multi-storey RCC buildings have been compared. The analysis is being carried out using SAP 2000 software package.

Keywords

Floating Columns, Push Over Analysis, Performance Point, Hinge Pattern.

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