Selection of Design Base Plane of Bridge Based on Minimum Cost from Scouring and Seismic Viewpoint
Date Issued
2008
Date
2008
Author(s)
Su, Jain-Hong
Abstract
The Seismic Design Specifications for Highway Bridges provide that design of base plane should be not only consider the scour but the deposit. Therefore, the present study intends to find the lowest total expenditure at different depth of design base plane. The study uses the Capacity Spectrum Analysis (CSA) to determine their aseismatic capability and damage analysis. This study uses the CSA to determine the aseismatic capability at different depth of design base plane then to divided the earthquake damage into no damage, slight damage, moderate damage, extensive damage, and complete damage. Moreover, this study also uses the Coefficient of Variation (CV) of the aseismatic capability to calculate the incidence of each damage levels on Peak Ground Acceleration (PGA). And using the annual excess probability curve correspond the different PGA to simulate the seismic hazard curve based on the location of the bridge. The repair expenses of all levels will be calculated with the percentage of the cost of the new bridge. Finally, it establishes one probability curve in the exposed depth of the location of the bridge to proceed the damage analysis. It considers that the exposed depth in a year as a random variable, and decide the depth of design base plane what is the most economical.
Subjects
scour
deposit
aseismatic capability
capacity spectrum analysis
hazard curve
exposed
damage analysis
Type
thesis
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