A Seismic Response Performance-Based Study of Pot Bearing System

Autor: Hsin-wen Wang, 王信文
Rok vydání: 2006
Druh dokumentu: 學位論文 ; thesis
Popis: 94
The purpose of this study was to establish an analysis model with the test results of the sliding pot bearing system. The sliding pot bearing system included a pot bearing and a shear key. The analysis software SAP2000 was employed to conduct a pushover analysis on the pot bearing system. For small displacements, the bearing provides a sliding mechanism, but when the displacement becomes larger and reaches the limit of displacement capacity, the bearing will be damaged. This study investigated the post-damaged behaviors upon the depletion of displacement capacity. This study applied this analysis component model to bridge models on Shitzitao River for a time history analysis of the 921 Earthquake. When a bridge experiences earthquakes, the sliding mechanism of the sliding bearing will take effect and avoid an excessive shear force on bridge columns. But continuous amplification of the earthquake force may result in the depletion of displacement capacity, loss of the sliding function, and damage of the bridge. Bridge columns may be unable to bear the unexpected force, and the damage sequence of the bridge system will be altered, culminating into unexpected damages to the bridge system. The analysis results showed that when the sliding pot bearing simply bears vertical Coulomb friction force within the displacement capacity, and the continuous amplification of the earthquake force has caused the depletion of displacement capacity, the sliding bearing will become a fixed bearing, causing a larger shear stress on the bridge and the damage of bridge columns. Based on the analysis results, it was indicated that the analysis model of the pot bearing system established in this study was feasible and could be applied to the evaluation of earthquake resistance of bridges.
Databáze: Networked Digital Library of Theses & Dissertations
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