基于MidasCivil的上承空腹式拱桥受力性能对比分析  

Comparative Analysis of Mechanical Performance of the Deck Open-web Arch Bridge Based on Midas Civil

作　　者：张清旭 宁晓骏[1] 陈旭[1] ZHANG Qingxu;NING Xiaojun;CHEN Xu(Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500

出　　处：《武汉理工大学学报（交通科学与工程版）》2020年第3期576-578,共3页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：为探究拱桥受力性能优化方式,以万荣南松河上承空腹式钢筋混凝土板拱为工程背景,采用有限元分析软件Midas Civil建立该桥参数化模型,研究成桥状态下结构的受力特点.考虑实腹段长度对拱桥受力性能的影响,选取4腹拱、6腹拱、8腹拱、10腹拱和12腹拱这五种布置形式,比较不同布置体系的静力性能、动力性能和地震作用下的抗震能力,找出比较合理的布置方案.结果表明:实腹段越长,腹拱数越少,静力性能越优.实腹段过长,自振频率减小.实腹段过小,结构的地震响应效果不够理想.综合考虑填土重量、经济因素,以及美观需求,8腹拱方案结构可靠,受力合理,较为美观,经济适用.In order to explore the optimization mode of arch bridge’s mechanical performance,taking the open-web reinforced concrete slab arch of WanrongNansong River as the engineering background,the parametric model of the bridge was established by using the finite element analysis software Midas Civil,and the mechanical characteristics of the structure in the completed state were studied.Considering the influence of the length of the solid web section on the mechanical performance of arch bridge,five layout forms,i.e.4-arch,6-arch,8-arch,10-arch and 12-arch,were selected.The static performance,dynamic performance and seismic resistance of different layout systems were compared,and a more reasonable layout scheme was found out.The results show that the longer the solid web section,the less the number of web arches and the better the static performance,and the longer the solid web section,the lower the natural frequency.The seismic response effect of the structure is not ideal because the solid web section is too small.Considering the fill weight,economic factors and aesthetic requirements,the abdominal arch scheme is reliable in structure,reasonable in stress,economical and applicable,and beautiful in appearance.

关 键 词：实腹段 有限元 拱桥 静力性能 地震响应 

分 类 号：TU311[建筑科学—结构工程]