Comparison of seismic capacity/demand ratios of two kinds of foundation schemes of Taizhou Bridge  

作　　者：Zhao Yi Peng Tianbo Han Lei 

机构地区：[1]State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China

出　　处：《Engineering Sciences》2012年第3期26-32,共7页中国工程科学（英文版）

基　　金：National Science and Technology Support Program of China(No.2009BAG15B01);Key Programs for Science and Technology Development of Chinese Transportation Industry(No.2008-353-332-190);the Ministry of Science and Technology of China(No.SLDRCE 08-B-04);the Fundamental Research Funds for the Central Universities and Kwang-Hua Fund for College of Civil Engineering of Tongji University

摘　　要：Pile group foundation and caisson foundation are two common foundation schemes of long-span bridges, and the seismic performances of the two kinds of foundations are different. Taking Taizhou Bridge as an example, which is the first kilometer level three-pylon two-span suspension bridge in the world, two foundation schemes are designed for the middle pylon, and two whole bridge models with two different foundation schemes of the middle pylon are established respectively in this paper. The effects of foundation-soil interaction are simulated by equivalent linear soil springs whose stiffnesses are calculated according to m method. Seismic capacity/demand ratios of the two models are calculated. The following conclusions can be drawn: the weak positions of the two schemes are not the same; if caisson foundation is adopted for the middle pylon, the weak position is the bearing capacity of the middle pylon foundation, while if pile group foundation is adopted for the middle pylon, the weak position is the bearing capacity of the side pylon foundation.

关 键 词：Taizhou Bridge FOUNDATION capacity/demand ratio 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] P642[交通运输工程—道路与铁道工程]