โครงการประเมินโครงสร้างต้านทานแผ่นดินไหวของสะพานสารสิน 2 และสะพานเทพกระษัตรี

THE SEISMIC ASSESSMENT OF SARASIN II BRIDGE AND THEP KRASATTI BRIDGE

Abstract

The purpose of this study is to evaluate the seismic resistance of Sarasin II and Thep Krasatti Bridges within the realm of ground shaking resulting from movement of Khlong Marui Faults. The evaluation was conducted numerically using time history analysis along with pushover analysis. Conditions of both bridges as well as their fundamental dynamic properties were field-examined and were used to validate the models. Analyses of both bridges excited by seven selected seismic waves representing an earthquake of magnitude of 5.9 to 6.0 Richter reveal that the top pier displacements of both bridges exceed their limiting capacities. It is recommended that the restrainers should be installed in both bridges to prevent possible damages. In particular, the piers of Thep Krasatti Bridge should also be strengthened.