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...

on april 15, 1979,a destructive earthquake struck the southwestern part of yugoslavia, in which the total damage exceeded 2.7 billion dollars. in this paper, major engineering lessons learned in this earthquake are discussed and illustrated with representative photographs. the main causes of failure of masonary and reinforced concrete buildings are pointed out. effect of architectural design on...

This paper presents a three-dimensional nonlinear degrading stiffness model capable of capturing stiffness degradation in bilateral directions for earthquake response analyses of reinforced concrete bridges. Stiffness degradations due to flexural and shear damage are considered. The model can trace the progress of damage from initial failure through gradual degradation of the member stiffness d...

an earthquake was happened on 23 october 2011 in van, turkey (mw7.2) at the eastern most area of anatolian plateau and in the neighborhood of iranian border (west azerbaijan province). the study was performed based on field and office observations and has been focused on the process of disaster management in turkey after the 23 october 2011 earthquake. we surveyed the quake from the view point ...

Monitoring of earthquake faults and volcanoes contributes to our understanding of their dynamic mechanisms and to our ability to predict future earthquakes and volcanic activity. We report here on spatial and temporal variations of seismic velocity around the seismogenic fault of the 2016 Kumamoto earthquake [moment magnitude (Mw) 7.0] based on ambient seismic noise. Seismic velocity near the r...

When an extreme earthquake occurs, it is essential to detect the severe structural damage that affect the structural safety immediately. This paper proposes a method for quick earthquake damage detection/evaluation of reinforced concrete bridge columns. An intelligent sensor unit is developed that captures changes in the natural period of a bridge column by FFT of response acceleration recorded...