This study focuses on developing fragility-based seismic vulnerability assessment techniques for seismically retrofitted multi-column bridge bent. Fragility curves are developed using Probabilistic Seismic Demand Model (PSDM) to assess the relative performance of different retrofit methods under near fault ground motions. Two different retrofit techniques namely CFRP jacketing and ECC jacketing...

Craig E. Taylor, President, Natural Hazards Management Inc. James E. Moore III, Associate Professor, Departments of Civil Engineering and Public Policy and Management, University of Southern California Sungbin Cho, Research Associate, School of Policy, Planning, and Development, University of Southern California Jon S. Walton, Vice President, MacFarland Walton Enterprises Stuart D. Werner, Prin...

In this paper, a general methodology for the seismic protection of historical structures and monuments is presented. The proposed methodology is applied to one historical and monumental structure, in Cyprus, within the frame of the European Project for the Conservation of Historical Mediterranean Sites by Innovative Seismic-Protection Techniques. According to the proposed method, the structure ...

Substations, key components of electric power systems, are susceptible to significant damage under seismic events. The overall goals of this task are seismic design and rehabilitation of existing substations using advanced technologies to reduce the likelihood of failure and/or to enhance the probability of postearthquake system functionality in a timely manner. It will also ensure long-term re...

Researches show that the strength criterion is inadequate for design of structures against seismic loads. Since structures yield and experience plastic deformation under strong ground motion, considering structural damage with inelastic behavior may be a considerable criterion for design and control of the structures.In this paper, three steel structures with dual system consisting of intermedi...

In the fall of 1998, the Federal Highway Administration of the U.S. Department of Transportation initiated a series of studies related to the seismic performance of the U.S. national highway system. The research conducted under this study is intended to provide improved tools for evaluating and assessing the social costs and impacts of earthquakes on highway systems and bridges, and to reduce t...

The aim of this paper is to investigate landslide prone areas in Nilgiri hills which have caused damage to people and properties and to devise preventive steps to be taken in the events of future landslides. Our study area was situated at Ooty region, Nilgiri District, Tamilnadu. In this study we use the seismic refraction survey carried out across landslides located near the villages in Allanc...

Abstract—This study investigated the change of weir structure performances when durability of concrete, which is the main material of weir structure, decreased due to their aging by mean of seismic fragility analysis. In the analysis, it was assumed that the elastic modulus of concrete was reduced by 10% in order to account for their aged deterioration. Additionally, the analysis of seismic fra...

Seismic hazards remained as a challenge to engineers over ages. In order to reduce loss of life and damage to property due to earthquake, several techniques have been developed among which Seismic Isolation technique using Elastomeric Isolators has gained high acceptance and becoming popular all over the world, due to its simplicity, reliability and overall cost effectiveness. Seismic Isolation...

High resolution seismic refraction tomography has proved to be a useful tool to effectively estimate depth of blast induced damage in a mine face. Excavation blast damage can be as shallow as 1 to 2m and requires resolution at a fraction of a meter for effective imaging. We used an accelerometer with flat frequency response to 1000Hz to record data at spacings of approximately 0.25 to 0.5m alon...