Earthquake resilience of Pol houses in Ahmedabad
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I is the macro seismic intensity (considered equivalent to the MSK Intensity scale adopted by IS:1893)
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V refers to the vulnerability index estimated in Eq (iii)
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Q is the ductility factor
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𝝁𝑫 is the mean damage calculated.
The classes (A, B, C, D) of the 11 parameters are defined by qualitative as well as quantitative methods. For example, the position of the building and foundation is a qualitative aspect for the specifications for individual classes that are studied from the Eurocode – guidelines of soil type concerning earthquake phenomenon. While the parameter of conventional resistance is calculated by formulating shear strength and specific weight of the masonry. The 11 parameters are explained in the next section.
3.4.2 Parameters for analysis As mentioned in GNDT method for calculating the vulnerability index 11 parameters are used. These 11 parameters are broadly grouped in 4 parameter groups, each parameter is defined from the existing literature, expert opinions, and parametric analysis. The classes A, B, C, and D, are formulated from the qualitative observations as well as modeling (Shakya, 2014) (modeling is not in the scope of this research). These four groups are as follows: •
Structural system
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Irregularities and interaction
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Horizontal structure and roofing
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Conservation status and other elements
Parameter 1 - Type and organization of resisting system – Parameter 1 focuses on the quality of distribution of structure, the efficiency of connections, connections between the horizontal diaphragm, and orthogonal walls. This parameter does not consider the constituents of masonry. For this parameter, the corner connections are given importance. The significant element is the presence and
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