Comparison of Design Method of Wall Pier and Bent Bridge Based on Minimum Cost from Scouring and Seismic Viewpoint
Date Issued
2009
Date
2009
Author(s)
Lo, Yu-Chi
Abstract
The Seismic Design Specifications for Highway Bridges specifies that the pier of the bridge must maintain its’ elasticity during an earthquake. However, this method is not very cost effective for wall pier bridges and bent bridges. Therefore, the study will provide two methods of bridge design. The first method is to implement static analysis according to the Seismic Design Specifications in designing wall piers and bent bridges. The second method is by load combination in designing the pile of bridge substructures. Increasing the stirrup allows the plastic hinge to occur at the top of the pile. Then by using the Capacity Spectrum Analysis (CSA) the designer can determine the method’s aseismatic capability and damage analysis. This creates a comparison of the two methods This study uses CSA to determine the seismic capability of different depths of base plane. The earthquake damage is divided into sections ranging from no damage, slight damage, moderate damage, extensive damage, and complete damage. Moreover, this study also uses the Coefficient of Variation (CV) of the seismic capability to calculate the incidence of each damage levels on Peak Ground Acceleration (PGA). Using the annual excess probability curve to correspond with the different PGA will simulate the seismic hazard curve based on the location of the bridge. The repair expenses of all of the levels will be calculated as a percentage of the cost of the new bridge. A probability curve is established in the exposed depth of the bridge location in order to begin the damage analysis. The probability curve uses the exposed depth in a year as a random variable. This report will compare the efficiencies of the two methods.
Subjects
wall pier
bent
aseismatic capability
capacity spectrum analysis
fragility curve
hazard curve
damage analysis
Type
thesis
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