系杆拱桥框架式纵向联结系设计的优化研究  

Optimization Study on Frame Longitudinal Connection System Design of Tied Arch Bridge

作　　者：金成棣[1] 安静洁 陆聪 JIN Cheng-di;AN Jing-jie;LU Cong(Tongji University,Shanghai 200092,China;Shanghai Lande Highway Engineering Consulting and Design Co.,Ltd.,Shanghai 200065,China)

机构地区：[1]同济大学,上海200092 [2]上海兰德公路工程咨询设计有限公司,上海200065

出　　处：《中国市政工程》2019年第1期95-99,114,共6页China Municipal Engineering

摘　　要：主要研究系杆拱桥常用框架式纵向联结系的设计优化。根据组合柱理论,对联结系的节段划分、横撑尺寸、隅支撑设置、提篮式横断面布置等,及对组合柱组合惯性矩效应系数α的影响,以合理的临界荷载系数为目标,用算例运算展示优化步骤与成果。对优化的框架式联结系考虑非保向力系影响,即吊杆力对拱肋面外稳定性的扶正力作用,计算得出相关结果,为提高系杆拱桥的设计能力提供参考。This paper mainly studies the design optimization of frame longitudinal connection commonly used in tied arch bridges.According to the theory of composite columns,the optimum steps and results are shown by calculating the reasonable critical load coefficient for the segment division,the size of cross braces,the setting of corner braces,the layout of basket-type cross sections,and the influence on the moment of inertia effect coefficient α of composite columns.Finally,considering the influence of non-retaining force system,that is,the correcting force of suspender force on the out-of-plane stability of arch ribs,the related results are obtained,which can provide reference for improving the design ability of tied arch bridges.

关 键 词：系杆拱桥 纵向移动 扶正力 临界压力 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]