[VOLUME 6 I ISSUE 1 I JAN. – MARCH 2019] e ISSN 2348 –1269, Print ISSN 2349-5138 http://ijrar.com/ Cosmos Impact Factor 4.236 Research Paper IJRAR- International Journal of Research and Analytical Reviews 721 Effect of RC Shear Wall on Progressive Collapse Behaviour of RCC Building Darshan K. Vaghamashi 1 & Tushar N. Patel 2 1 Post graduate Student, Sardar Vallabhbhai Patel Institute of Technology Vasad, India. 2 Assistant Professor, Department of Civil Engineering, Sardar Vallabhbhai Patel Institute of Technology Vasad, Received: February 06, 2019 Accepted: March 06, 2019 ABSTRACT: A structure is subjected to progressive collapse when a primary vertical structural element fails, resulting in failure of adjoining structural elements which cause further structural failure leading eventually to partial or total collapse. The failure of a primary vertical support might occur due to extreme loadings such as bomb explosion in a terrorist attack. Different guidelines such as the General Services Administration (GSA) and the Unified Facilities Criteria (UFC) addressed the structural progressive collapse due to the sudden loss of a main vertical support. In current study a progressive collapse assessment according to the GSA guideline is carried out for a typical 6-storey, 10-storey & 12-storey RC framed structure designed according to IS 456:2000. Structural model of building is created in ETABS 2016 software and loads are applied as per GSA guidelines, for evaluation of progressive collapse Linear static analysis has been used. As per GSA guidelines three column and two shear wall removal case one at a time has studied, namely Corner column, Edge column, Internal column, Edge shear wall, and Internal shear wall. For all cases linear static analysis has done and DCR ratios are evaluated. Member having DCR ratio greater than 2 will going to fail for corresponding column removal case. By Linear static analysis it is obtained that the buildings have high potential for progressive collapse for all the cases, except the Internal shear wall remove case. Key Words: Linear Static Analysis, Progressive Collapse Analysis, RC Building, DCR ratio, ETABS 2016 I. INTRODUCTION Progressive collapse of building happens when the sudden loss of local elements leads to a collapse disproportionate to the original destruction. Usually, these original destructions are triggered by events which may lead to serious results, like accidental explosion, serious fire or terrorist attacks. The positional failure or destruction in buildings or structures usually consequences from unexpected unusual forces. The unusual forces result from unexpected accidents that are identified their occurring possibility is low, short duration effect and high severity. The loads such as pressure loads (like bomb blasts and gas explosion), deformation loads (softening elements that are resulting from fire) and impact load can be considered as abnormal loads (ASCE, 2005). The General Services Administration (GSA) of the United States defines this phenomenon as ‘a situation where local failure of a primary structural component leads to the collapse of adjoining members which, in turn, leads to additional collapse. Hence, the total damage is disproportionate to the original cause. Other definitions found in the progressive collapse related literature are: ‘collapse of all or a large part of a structure precipitated by failure or damage of a relatively small part of it’; ‘a catastrophic partial or total structural failure that ensues from an event that causes local structural damage that cannot be absorbed by the inherent continuity and du ctility of the structural system’ While a number of different definitions of progressive collapse coexist, the notion of disproportionality is common to all of them. II. ACCEPTANCE CRITERIA AND ANALYSIS PROCEDURE For static analysis purposes the following vertical load shall be applied downward to the structure under investigation: Load = 2(1.2DL + 0.5LL) Eq. (1) Where, DL = Dead Load, and LL = Live Load. 2.1 Linear static analysis In the linear static analysis column is removed from the location being considered one at a time and linear static analysis is performed. From the analysis results demand at critical locations are obtained and from the original seismically designed section the capacity of the member is determined. Check for the DCR in each structural member is carried out. If the DCR of a member exceeds the acceptance criteria in shear
Effect of RC Shear Wall on Progressive Collapse Behaviour of RCC Building
Jun 20, 2023
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