【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.更多还原

【Abstract】 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.更多还原