基于影响矩阵法的多跨系杆拱桥吊杆张拉力计算与优化  

Optimization of Tension Force for Hangers in Multi-Span Tied-arch Bridge Based on Influence Matrix Method

作　　者：高婧[1] 陈龙云 王俊文 GAO Jing;CHEN Long-yun;WANG Jun-wen(Department of Civil Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学土木工程系,厦门市361005

出　　处：《公路》2022年第9期165-170,共6页Highway

基　　金：国家自然科学基金联合基金项目,项目编号U2005216;中国中铁股份有限公司科技研究开发计划项目,项目编号2020-重点-11;福建省自然科学基金项目,项目编号2020J01010。

摘　　要：马洲大桥为五跨连续中承式钢拱桥,为了得到该桥施工过程中的合理吊杆张拉方案,提出12种张拉方案,基于影响矩阵法对吊杆不同的张拉方案进行计算分析,并结合软件MIDAS Civil对该桥吊杆张拉进行优化。通过对比吊杆张拉力、吊杆力、结构应力和变形,并综合考虑安全性、适用性、施工便捷性原则,最终确定了合理的吊杆张拉工序,以确保桥梁施工中结构变形平缓,受力合理。结果表明,对多跨拱桥采用分两批次分四部分交错对称张拉,吊杆力变化幅值小,可以保证施工阶段安全,成桥后构件应力分布更均匀。The Mazhou Bridge is a five span half-through steel arch bridge.In order to obtain the most reasonable tensioning sequence of hangers during its construction process,12 tension schemes are proposed.Based on the influence matrix method,all of the tension schemes of the hanger are analyzed and optimized using the software MIDAS Civil.The most reasonable tension sequence is decided by comparisons of tension force,hanger force,stress level and deformation,with considerations on construction safety,feasibility and convenience,aiming at a flat deformation and rational force distribution during construction.The results show that symmetrical hanger tensioning with two batches and four parts staggered for the multi-span arch bridges will result in a small change in hanger force,by which the construction safety can be ensured,and the force in hangers can be distributed evenly.

关 键 词：钢拱桥 吊杆 张拉顺序 影响矩阵法 计算与优化 

分 类 号：U441.5:U448.225[建筑科学—桥梁与隧道工程]