Abstract
Earthquake causes considerable damage to a large number of RCC high-rise buildings and tremendous loss of life. Therefore, designers and structural engineers should ensure to offer adequate earthquake resistant provisions with regard to planning, design, and detailing in high-rise buildings to withstand the effect of an earthquake and minimize disaster. As an earthquake resistant system, the use of coupled shear walls is one of the potential options in comparison with moment resistant frame (MRF) and shear wall frame combination systems in RCC high-rise buildings. Furthermore, it is reasonably well established that it is uneconomical to design a structure considering its linear behavior during earthquake. Hence, an alternative design philosophy needs to be evolved in the Indian context to consider the postyield behavior wherein the damage state is evaluated through deformation considerations. In the present context, therefore, performance-based seismic design (PBSD) has been considered to offer significantly improved solutions as compared to the conventional design based on linear response spectrum analysis.
Highlights
The growth of population density and shortage of land in urban areas are two major problems for all developing countries including India
It has been observed that all beams reach to their rotational limit of collapse prevention (CP) level for pinned base condition; very few beams reach to their rotational limit of CP level for fixed base condition (Figure 12)
Beam rotation and capacity curve do not reach the CP level for the other cases while shear capacities in all coupling beams have been achieved. It means that ideal seismic behavior of coupled shear walls has only been achieved for Length of coupling beam (Lb) = 1 m with pinned base condition
Summary
A recent earthquake in India on January 26th, 2001 caused considerable damage to a large number of RCC high-rise buildings (number of storey varies from 4 to 15) and tremendous loss of life. The reasons were (a) most of the buildings had soft and weak ground storey that provided open space for parking, (b) poor quality of concrete in columns, and (c) poor detailing of the structural design (http://www.nicee.org/eqeiitk/uploads/EQR Bhuj.pdf). This particular incident has shown that designers and structural engineers should ensure to offer adequate earthquake resistant provisions with regard to planning, design, and detailing in highrise buildings to withstand the effect of an earthquake to minimize disaster
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