Abstract
In this paper, probabilistic seismic demand analysis is adopted to investigate the seismic fragility of a certain typical irregular highway bridge in the Chinese western mountainous areas. Consider...
Highlights
The seismic zones are widely distributed and the seismic activities are frequent in the western mountain area of China (Lin, Hung, Liu, & Chai, 2010)
We investigate the seismic performance of irregular bridge structure with larger height difference of pier, and we discuss the seismic vulnerability of continuous rigid frame girder bridge with long span and high-rise pier in western China
Where βEDPjIM and βC are the lognormal standard deviation of the seismic demand and capacity for bridge structural component, respectively; φð:Þ is standard normal cumulative distribution function; Sc is the median of structuraql sffieffiffiiffiffisffiffimffiffiffiffiifficffiffiffifficffiffiaffiffiffipffiffiffiacity in a certain limit state; and Sd is the median of structural seismic demand. βcomp 1⁄4 β2EDPjIM þ β2C is the logarithmic standard deviation of the fragility function
Summary
The seismic zones are widely distributed and the seismic activities are frequent in the western mountain area of China (Lin, Hung, Liu, & Chai, 2010). Seismic vulnerability analysis of three typical irregular types of reinforced concrete simple supported bridges with medium-span located in the high seismicity zone of Mexico is adopted to determine the best strength and stiffness parameters of their isolation system by Jara et al (2013). A few studies are related to the seismic vulnerability analysis of irregular bridge as the frequently applied long-span continuous rigid-frame girder bridge with high-rise pier (Billah & Alam, 2015), especially for the bridge with more than 30 m height difference between different piers. We investigate the seismic performance of irregular bridge structure with larger height difference of pier, and we discuss the seismic vulnerability of continuous rigid frame girder bridge with long span and high-rise pier in western China. The seismic fragility characteristics of irregular bridge structure are discussed
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