预应力混凝土折线塔拉索锚固区结构特性  

Study of characteristics on anchorage zone of prestressed concrete polygonal line bridge

作　　者：李艳凤 梁力[2] 王福春[2] 

机构地区：[1]沈阳建筑大学交通工程学院,辽宁沈阳110168 [2]东北大学土木工程研究所,辽宁沈阳110004

出　　处：《辽宁工程技术大学学报（自然科学版）》2017年第9期938-943,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金(51474048);宁省教育厅科学研究一般项目(L2015442);沈阳建筑大学一般项目(2015050)

摘　　要：以沈阳市某斜拉桥为工程背景,对该桥特殊结构的力学特点进行研究,采取模型实验及Madis/Civil数值分析相结合的方法,对预应力混凝土折线塔主塔锚固区进行研究,将实验及数值分析的结果进行对比及分析.结果表明:预应力混凝土折线塔主塔锚固区模型试验与理论分析的结果基本一致,在斜拉索的作用下,折线塔外壁斜拉索的索孔上方处较其他外壁处应力集中,易产生裂缝;折线塔在倒角处最先开裂,倒角处的应力集中较为严重,为折线塔设计的关键部位.Taking the cable-stayed bridge in Shenyang as the research background, this paper analyzed the special structure theory of the bridge. According to the finite element theory and the model test, the main mechanical properties anchorage zone of concrete cable-stayed bridge with fold-line tower were studied. The results show that the theoretical analysis of line tower cable-stayed bridge main tower anchorage zone was consistent with model test results. Under the incline cable force, the position of cable outer wall cable hole at the top of cable hole has more stress concentration than other outer wall which is easy to crack. Line tower cracks first at chamfer, and the stress concentration in chamfering is relatively serious, which is the key design parts of polygonal line bridge.

关 键 词：斜拉桥 折线塔 有限元法 模型试验 拉索锚固区 力学特性 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]