Seismic Behavior of L-Shape RC Building and Effect of Shearwall

Author Name(s): Dr. Prashant Hiwase, Sushant G. Kute, Dr. Prasad P. Dahale, Udaysingh Patil
Author Email: prashant.hiwase@gmail.com

Abstract

As the need and demand of the new generation and increasing population has made the architects or engineers forces towards the planning of structure having irregular plan configurations. It is necessary to identify the performance of such structures to withstand against lateral load due to earthquakes. In the current study, the analysis of a multi-storeyed RC building of L-shape having G+8 Storey in medium soil is carried out with Equivalent Static Analysis in Staad.pro Advanced Connect edition Software. Also this study is carried out the effect of shear walls to improve the performance of building during the earthquake. The equivalent static analysis gives the same value of Base shear & Time period in X, Z direction in both cases. Joint displacement at the corner of the building is found less in building with shear walls.

Introduction

The buildings that have been significantly damaged during past earthquakes have shown that the dynamic behaviour of structures is affected to a great extent by its shape, dimensions, and location of structural elements. [1,11] Issues with respect to architect are frequent on structural demand to design earthquake-resistant buildings. The buildings with regular geometry and uniformly distributed mass and stiffness in the plan as well as in elevation suffer much less damage compared to irregular configurations. [12,13] But nowadays the Presence of re-entrant corners in the floor plan is one such irregularity. But these types of building configurations give functional, ventilation and spatial advantages. L,H,C and + are Irregular floor plan which is commonly used for public buildings (such as hotels, schools, hostels, apartments) in urban areas because they provide more no. of perimeter rooms with proper ventilation as well as open areas which can be used as parks, playgrounds, assembly areas. [3,11] If building is irregular, then excessive stresses or forces get developed in a certain portion and they cause serious damages.

Conclusion

1. The equivalent static analysis gives the same value of Base shear & Time period in X, Z direction in both models. 2. Joint displacement at the corner of the building is found less in building with shear walls. 3. The values of reaction at corner supports of buildings are comparatively higher in building with shear walls. 4. In a building with the shear wall, the maximum displacement is observed in the lower part of the corner columns and in a building having bare frame it is observed in upper part of the corner columns.

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