The rather moderate sized (magnitude 6.6) Bihar earthquake of August 21, 1988 demonstrated clearly that the Indian Engineering profession is far from prepared for a larger earthquake. During the author's extensive travel within the areas affected by this earthquake, it became clearer that the engineering community should immediately initiate serious and coordinated efforts to prepare for the po...

M. MOMENI A. SHAFIEE, M. HEIDARI, M. K. JAFARI AND M. R. MAHDAVIFAR Dept. of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, I. R. of Iran Email: [email protected] Geotechnical Engineering Research Center, International Institute of Earthquake Engineering and Seismology, No. 26, W. Arghavan St., N. Dibaji St., Tehran, I. R. of Iran Geology Dept., Facu...

The objective of this paper is to showcase the progress of the earthquake engineering community during a decade-long effort supported by the National Science Foundation in the George E. Brown Jr., Network for Earthquake Engineering Simulation (NEES). During the four years that NEES network operations have been headquartered at Purdue University, the NEEScomm management team has facilitated an u...

one of the important problems in earthquake geotechnical engineering is liquefaction phenomenon that happens in loose saturated granular soils. in this study, 11 boreholes from govanjik and dayalar area in downstream of sattarkhan dam collected and evaluated. results of research are showed that with assuming cementation in soils, liquefaction potential is weak to moderate than non-cemented cond...

In a medium-to-large earthquake, there are often reports of people being trapped or injured in elevators. This study investigates using an earthquake early warning (EEW) system, which provides seconds to tens of seconds warning before seismic waves arrive at a site, to help people escape from the elevators before a strong shaking arrives. However, such an application remains as a major engineer...

A critical step in performance-based seismic design is the prediction and definition of earthquake performance using terms that are meaningful to building owners. Recently, economic impact, defined as the cost of repairing earthquake damage and the building downtime required to complete the repair work, has been adopted as a meaningful measure of building performance. To enable earthquake engin...

To achieve loss-reduction objectives and to enhance community and societal resilience in the event of earthquakes and other disasters, researchers and practitioners must take into account the broader societal environment in which loss-reduction solutions are applied. For that purpose, researchers at the Multidisciplinary Center for Earthquake Engineering Research ~MCEER! have developed two conc...

Semi-active control devices have been shown to be more energy efficient than active devices and more effective in reducing seismic structural vibration than passive devices. A new type of semi-active control device, the piezoelectric friction damper has been made in this paper. Piezoelectric actuators used in the dampers can quickly and accurately respond to a voltage signal. They are also effe...

The ability to monitor the health of an instrumented structure, detect damage as it occurs, and issue an early warning during or soon after the earthquake (or some other natural or man made disaster), and before physical inspection is possible, has significant potential benefits in reducing loss of life and injuries, in emergency response, and in recovery following the disaster. The timeliness ...

The recent development of wavelet analysis techniques has made it possible to represent the temporal variations of frequency content in an earthquake accelerogram elegantly. These techniques are more versatile than the other time-frequency localizing techniques due to their flexible time-frequency windowing feature. This development has led to the timeand frequency-based characterizations of gr...