Analysis of structural hot-spot stress in orthotropic plates

作     者：Chen Ce Ji Bohai Xu Hanjiang 

作者机构：College of Civil and Transportation Engineering Hohai University Nanjing 210098 China Jiangsu Provincial Yangtze River Highway Bridge Construction Commanding Department Taizhou Jiangsu 225321 China 

出 版 物：《Engineering Sciences》 (中国工程科学（英文版）)

年 卷 期：2012年第10卷第3期

页      面：88-92页

学科分类：081406[工学-桥梁与隧道工程] 080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：National Science and Technology Support Program of China(No.2009BAG15B02) Key Programs for Science and Technology Development of Chinese Transportation Industry(No.2008-353-332-180) "333 High-level Personnel Training Project"Special Funded Projects in Jiangsu Province Jiangsu Communications Science Research Program(No.08Y29-16) 

主　　题：steel bridge deck local structure mesh density hot-spot stress 

摘      要：On the basis of the actual steel deck structure of Taizhou Bridge, this paper carries out hot-spot stress analysis on some key spots by using the finite element model which simulates local structure of orthotropic steel bridge decks. A finite element model is established for local structure of orthotropic steel bridge decks, and in the analysis of linear elasticity of the structure, face load is employed to simulate the loads from vehicle wheels. Analysis results show that main stresses are relatively heavy at the joints between diaphragm plates, top plates and U-shaped ribs and the joints between diaphragm plates and U-shaped ribs. These joints shall be regarded as key points for hot-spot stress analysis. Different mesh densities are adopted in the finite element model and the main stresses at different hot spots are contrasted and linear extrapolation is carried out using extrapolation formulae. Results show that different mesh densities have different influences on the hot-spot stresses at the welded seams of U-shaped ribs. These influences shall be considered in calculation and analysis.