索梁锚固区应力状态单因素影响分析  

Single factor analysis on stress state of cable-girder anchorage zones

作　　者：高小妮[1] 贺拴海[2] 赵煜[2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《广西大学学报（自然科学版）》2012年第1期94-102,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50908017/E080505);国家交通运输部西部交通建设项目(2011 318 812 970)

摘　　要：为研究不同锚固区节段长度对索梁锚固区应力状态的影响,建立2种锚固构造的8个壳单元模型进行双重非线性(几何非线性和材料非线性)分析,比较8个模型中钢锚箱、钢锚梁、腹板和横隔板的应力分布情况。对比结果表明:不论锚固构造横桥向设置还是顺桥向设置,锚固区节段长度对钢锚箱的应力影响相对较小,而对钢锚梁、腹板和横隔板的应力影响较大;当所选锚固区节段长度远离锚固区大于2倍梁高时,计算结果差值在5%以内。所得结论可供锚固区数值模拟参考。In order to investigate the influence of different anchorage segment lengths on the stress state of cable-girder anchorage zones, the dual nonlinear （geometric and material nonlinear） analysis of eight shell element models of two kinds of anchorage zone structures were carried out. The stress distribution on anchor box, anchor beam, web and diaphragm, and the buckling behavior of anchor segment of the eight models were compared. The results show that the influence of anchor segment length on the stress of anchor box is small, while the influence on the stress of anchor beam, web and diaphragm are large, no matter the anchorage zone is along or across the bridge. The difference between the calculated results is less than 5% , when the length of selected anchor segment is twice bigger than the girder height away from the anchorage zone. The results thus can provide a reference for numerical simulation of anchor structure.

关 键 词：桥梁工程 锚固区 双重非线性 应力状态 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]