Abstract

This paper present detailed seismic hazard assessment of the peninsular india which is considered to be seismically most stable landmasses of the indian plate. Past seismic history in this region clearly shows that the seismicity of the area is varying. There were more than five damaging earthquakes with magnitude greater than 6 have occurred in this region stressing the importance of detailed seismic hazard assessment for the region.

Abstract

This paper presents the detailed seismic hazard assessment of the peninsular India (lat. 8-28N and long. 67.5-90E) which is considered to be seismically most stable landmasses of the Indian plate. Past seismic history in this region (Koyna, 10 December 1967; Bhadrachalam, 13 April 1969; Broach, 23 March 1970; Hyderabad, 30 June 1983; Latur, 30 September 1993; Jabalpur, 22 May 1997; Bhuj, 26 January 2001 etc) clearly shows that the seismicity of the area is varying. There were more than five damaging earthquakes with magnitudes greater than Mw 6.0 have occurred in this region, stressing the importance of detailed seismic hazard assessment for the region. For India, Bhatia et al. (1999) published a probabilistic seismic hazard map based on several well identified and prominent source zones in the country. An attempt has been made in this paper to study the present seismic status of this region incorporating the seismicity, tectonic and geological characteristics and using the collected earthquake data Peak Ground Acceleration was estimated using the attenuation relation developed by Iyengar and Raghukanth (2004). Estimated PGA values were used to compute the deviation with respect to assigned PGA values for various regions provided in Indian Standard code IS 1893:2002. The results show that, the estimated PGA in many areas of the Peninsular India is more than the specified value in the current seismic macrozonation map of the country. This provides an important basis for attempting the detailed microzonation of an area within the Penisular India. Key words: Seismic hazard, Peak ground acceleration (PGA), Peninsular India, Seismiczonation

Abstract

Pipelines are common transportation means for oil and natural gas, which act as an important lifeline facility for any nation. Often the design of these pipelines is a difficult task because they commonly are installed underground passing through different types of soil media. Many of these existing pipelines run through the faulted area, which continuously exposed to considerable risk of failure due to movement along the fault. Installation and maintenance costs of these pipelines directly depend on the total length of the pipelines. Furthermore ideal alignment for any pipeline as a straight line between the source and destination point is not that easy in the area where fault are present. It becomes necessary to divert the alignment about fault line which increases the length and subsequently operational and installation costs of pipeline. Common problems seen in the pipeline crossing the fault are change of alignment due to movement along the fault.

Abstract

Earthquake problems in India need no introduction. Some of the great earthquakes of the world occurred in India and neighborhood areas. During past two decades, India has witnessed 7 moderate earthquakes which caused large number of casualties and innumerable property loss. Most of these losses are due to poor quality of construction and generally low level of awareness of the earthquake hazard prevalent in the country. In this regard, there is a need for coordinated and sustained effort towards earthquake risk reduction in the country. This can be achieved through education and awareness building.

Abstract

In this paper, we discuss the numerical modeling of infinite media using transmitting boundary condition. This is done for simulating the propagation of elastic waves in soil media. Wave interaction with different kinds of boundaries is discussed explaining the numerical modeling procedure. Wave propagation in different directions is studied while calculating the velocities in different soil domain. For investigating the above-mentioned objectives, we used newly developed numerical model, viz., Applied Element Method and compared our results with Finite Element Method (FEM).

Abstract

The study was conducted in order to compute the deviations in the Peak Ground Acceleration values as specified in the IS 1893 2002 for different regions from the values obtained from modern empirical attenuation formulae. For this purpose earthquake events catalogue was prepared for various earthquake that occurred from year 1984 to 2003 in peninsular India.

Abstract

This paper describes the procedure of vulnerability assessment of structures for site specific peak ground acceleration. The objective of this paper is to define the building classification and development of damage probability matrix which represent the vulnerability of structure. The organization of this paper is as follows. First, the types of the structures are reviewed and a classification of structure based on the available data with Vulnerability Atlas of India is done. Second, the description of methodologies developed under various organizations is studied, adopted and summarized. Third, the theoretical methodology of the vulnerability analysis using fragility curve parameters given by HAZUS and capacity curve generated using SAP2000 for typical structure are presented and performance of structure is calculated by using capacity spectrum method.

Abstract

Earthquake Problems are not new to the country. We have witnessed several moderate earthquakes in the last two decades causing innumerable property loss and life loss. In order to minimize the loasses. We need to raise the awareness about earthquake resistant design of structures. This can be achieved by spreading the information on hazard vulnerability and risk to concerend people.

Abstract

This paper describes the procedure of vulnerability assessment for building structures in AP India. The objective of this paper is to define the building classification and development of damage probability matrix using fragility curve parameters of the building structures in Andhra Pradesh by using the avaiable information in Vulnerability Atlas of India developed by Building Materials and Technology promotion council Govt. of India (BMTPC).

Abstract

Urbanization is rapidly increasing all over the world. Past two decades in India many cities have attracted large population. Reasons being the belief of better education health care job/business prospects etc. For meeting the demands of population density many high-rise structures and large public gathering places are emerging in cities. Places where few thousands of people can meet are quite common in major cities. It is due to this reason evacuation at the public gathering places has gained a lot of importance