论文部分内容阅读
以鄂东长江公路大桥为依托,充分考虑非线性效应,基于几何控制法,研究拉索无应力长度误差对超大跨度混合梁斜拉桥成桥线形及内力的影响,发掘千米级混合梁斜拉桥边中跨结构力学行为特点及控制手段。计算分析揭示了超大跨度混合梁斜拉桥边中跨结构的差异,致使无应力索长误差对中跨成桥线形影响远大于边跨,对边跨成桥内力的影响则大于中跨部分,边中跨结构在受力上具有相对独立性;全桥应力变化百分比最大处位于钢-混结合段,该区域受力复杂,需引起施工及设计的高度重视;梁体刚度的差异,对成桥索力重分配产生重要影响,边中跨索力变化呈现不同特征。
Based on the East-Yangtze River Highway Bridge in East Hubei Province, the non-linear effect was fully taken into account. Based on the geometric control method, the effect of the stress-free length of the cable on the linear and internal forces of the bridge spanning the super long-span hybrid beam-stayed bridge was explored. Mechanical Behavior Characteristics and Controlling Means of Slab Mid - span Bridge Structure. Computational analysis reveals the difference between the mid-span structures of the super long-span hybrid cable-stayed bridge. As a result, the influence of the length of stress-free cable length on the linearity of the mid-span bridge is much larger than that of the side span, The mid-span structure has relative independence in stress. The maximum percentage of full-bridge stress changes is located in the steel-concrete mixing section. The stress in this area is complex and needs to be paid great attention to in construction and design. Bridge redistribution has an important impact on the red edge, mid-span cable changes show different characteristics.