Damage Assessment of Reinforced Concrete-Framed Building Considering Multiple Demand Parameters in Indian Codal Provisio
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RESEARCH PAPER
Damage Assessment of Reinforced Concrete‑Framed Building Considering Multiple Demand Parameters in Indian Codal Provisions Pritam Hait1 · Arjun Sil1 · Satyabrata Choudhury1 Received: 22 August 2018 / Accepted: 19 March 2020 © Shiraz University 2020
Abstract This paper investigated multi-objective seismic damage assessment procedure. Primarily, it estimates damage index (DI) of reinforced concrete-framed residential buildings situated in seismic zone V as per IS-1893-2016 (0.36 g) in India. Threedimensional DI has been estimated for a four-storey building by Park–Ang method. With the increase in the storey number, calculation of Park–Ang DI becomes tedious and more time-consuming procedure; therefore, this method is not suitable for large-scale damage investigation. To avoid the complexity, a simplified method has been proposed to estimate global damage index (GDI) of buildings easily. For this purpose, a four-storey residential building having plan aspect ratio 0.5, 0.75 and 1 has been analysed. In this study, the most influential parameters such as inter-storey drift, joint rotation and peak roof displacement have been combined to estimate GDI of structures directly. Based on this study, it has been observed that 0.893 times ground-storey DI (i.e. local DI) estimates similar Park–Ang GDI for a four-storey building. In this study, it has been observed that ground floor experiences maximum damage and top floor experiences least damage for all cases. The proposed approach effectively estimates reliable GDI that is useful for small- to large-scale damage assessment of buildings. Keywords Correlation matrix · Damage assessment · Engineering demand parameters · Global and local DI · Nonlinear time history analysis · RC frame building
1 Introduction An earthquake is the most severe, unavoidable and unanticipated natural calamity of all time. Numerous life and property losses are the consequences of an earthquake in the world every year and essentially responsible for several multi-hazard effects. Structures normally get damaged or collapsed because of the intensity level of earthquake, resulting in the imposition of excessive lateral load on the structure which is highly uncertain in nature. Therefore, structural system should be sufficiently robust to withstand the uncertain loading. However, the consideration of uncertainties in ultimate structural capacity along with validation is the key point in this type of study. On the other hand, within or beyond permissible range of its capacity, the structure may remain fully functional, partially and fully damaged or in unserviceable condition. Indeed, damage is a process or * Arjun Sil [email protected] 1
Civil Engineering Department, National Institute of Technology Silchar, Silchar, Assam 788010, India
mechanism in a system responsible for the degradation of strength, stiffness or ductility through which the structures mortify with respect to its initial capacity. However, normally in the early stage of construction process, the system failure is a
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