Dynamic analysis of externally prestressed bridges due to moving loads

• Main Authors: Yi-Pin Chang, 張毅斌
• Other Authors: Yuh-Yi Lin
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/85032090003745996297

碩士 === 淡江大學 === 土木工程研究所 === 82 === The purpose of this paper is to investigate the dynamic response of the externally prestressed concrete bridge due to vehicle loads and discuss the discrepancy between the dynamic and static analysis. A finite element model, including flat facet shell elements, link elements, and tendon elements, is used to model the concrete section, the key joints, and the external tendons of the segmental bridge. The dynamic loading is simulated by a HS20-44 truck moving along the bridge. The Newmark .beta. scheme is used for the numerical analysis. The example is a three-span bridge with external prestressing. The variations of the displacements, prestressing forces, and the crack widths due to different loadings are presented. The cracking load and the ultimate strength of the bridge are also discussed.