Socioeconomic Clustering in Seismic Risk Assessment of Urban Housing Stock

Abstract

A seismic risk assessment methodology based on socioeconomic clustering of urban habitat is presented in this paper. In this methodology, the city is divided into different housing clusters based on socioeconomic level of occupants, representing reasonably uniform seismic risk. It makes an efficient utilization of high resolution satellite data and stratified random sample survey to develop the building stock database. Ten different classes of socioeconomic clusters found in Indian cities are defined and 34 model building types (MBTs) prevalent on the Indian subcontinent have been identified and compared with the Medvedev-Sponheuer-Karnik (MSK) scale, European macroseismic scale (EMS), parameterless scale of seismic intensity (PSI), and HAZUS classifications. Lower and upper bound damage probability matrices (DPMs) are estimated, based on the MSK and EMS intensity scales and experience from past earthquakes in India. A case study of Dehradun, a city in the foothills of Himalayas, is presented. The risk estimates using the estimated DPMs have been compared with those obtained using the PSI scale. It has been observed that poorer people are subjected to higher seismic risk, both in terms of casualties and in terms of percent economic losses.

Developing an adaptive global exposure model to support the generation of country disaster risk profiles

“…In addition, efforts have been made to insert social conditions into the taxonomy process; e.g. in the context of India's cities, socioeconomic clustering has been considered by Prasad et al (2009) to capture the different building class distributions in zones of different socio-economic profile (e.g. in areas of informal sector housing as opposed to historic town centers etc.…”

Comparative Study of Seismic Design and Performance of OMRF Building Using Indian, British, and European Codes

“…Based on the vulnerability of different types of buildings, a detailed catalogue was prepared by the National Disaster Management Authority (NMDA), an agency established by the Ministry of Home Affairs [8]. Many researchers performed seismic vulnerability studies on such building types and modelled a damage scenario for several areas [9][10][11]. In India, 62% of buildings have an reinforced cement concrete (RCC) framed structure, rather than a masonry load-bearing structure [12][13][14].…”

Site-Structure Resonance as a Proxy for Structural Damage

“…The concept of DPMs was developed and first described by Whitman et al (1973) and later provided the basis for ATC-13 (1985). As an example, Table 1 illustrates a DPM for a class of Indian building typologies based upon the specifications of EMS-98 and MSK intensity scales (Prasad et al, 2009;Lang et al, 2012b 6 ). The DPMs are provided in terms of lower-and upper-bound estimates since intensity scales (e.g.…”

“…Table 1. Lower-and upper-bound damage probabilities for Indian building typologies MC3 and RC1 (Prasad et al, 2009;Lang et al, 2012b).…”