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三塔悬索桥与两塔悬索桥相比,具有更大的跨越能力,其结构行为与两塔悬索桥有很大的不同,主要表现在中塔对全桥结构行为的影响。以52m+2×650m+52m三塔悬索桥方案为例,阐述了中塔刚度对结构静力特性和中塔顶主缆抗滑移的影响、中塔高度和中塔处加劲梁支撑形式对结构静力特性的影响,研究结论对三塔悬索桥的设计具有一定的参考价值。
Compared with the two-tower suspension bridge, the three-tower suspension bridge has more ability to span and the structural behavior of the three-tower suspension bridge is quite different from that of the two-tower suspension bridge, which is mainly reflected in the influence of the tower on the behavior of the full-bridge structure. Taking the 52m + 2 × 650m + 52m three-tower suspension bridge as an example, the effect of medium tower stiffness on the static characteristics of the tower and the anti-slippage of the main tower in the mid-tower is expounded. Static characteristics of the impact of the conclusions of the study of the three towers suspension bridge design has some reference value.