异形拱桥拱脚结构局部受力分析  

Analysis of Local Stress of Special-Shaped Arch Springs

作　　者：张亚东[1] 赵康[2] 

机构地区：[1]泛华建设集团有限公司南京设计分公司,江苏南京210019 [2]南京林业大学土木工程学院,江苏南京210037

出　　处：《南京工程学院学报（自然科学版）》2015年第4期23-27,共5页Journal of Nanjing Institute of Technology(Natural Science Edition)

基　　金：高等学校博士学科点专项科研基金项目(20133204120015);江苏省高校自然科学基金项目(12KJB560003)

摘　　要：为研究异形拱桥拱脚位置的局部受力性能,基于整体结构空间有限元分析建立拱脚局部子结构精细化模型,对不同工况下子结构的受力状态进行分析.结果表明:拱脚端横梁下支座反力呈现较为明显的不均匀性,中部支座反力较大,两侧支座受力较小.温度对支座反力的分布规律影响小,对拱脚应力分布的影响明显,拱脚构造过渡段会出现局部应力集中现象.In order to study the local mechanical properties of special-shaped arch springs, a refinement model for local sub-structures of arch foot is built based on the integral space finite element analysis. The model is then used to study the stress conditions of the sub-structures under different situations. The results indicate that the support pressure under the arch foot side beams is apparently inhomogeneous, which means the support pressure in the middle is bigger than those on both sides. Moreover, temperature exerts minimal impact on the distribution law of bearing reaction force but has significant effect on stress distribution of arch feet. And stress concentration will occur in transition section of arch springs.

关 键 词：异形拱桥 结构设计 空间受力分析 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]