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大跨径悬索桥桁架加劲梁节段拼装连接是主梁安装的关键工序,固结时机选择不好,会在加劲梁节点处产生较大次应力,降低结构安全储备,甚至影响桥梁的使用寿命,以湖北沪蓉西四渡河大桥为背景,研究加劲梁在4种不同固结方案状态下的受力特征,得到了加劲梁截面应力及各相邻加劲梁截面之间开口距离的变化规律,提出了加劲梁施工过程中的临时连接及永久固结的最佳时机。
Large span suspension bridge truss stiffening girder segment assembly connection is the key process of girder installation, the timing of consolidation is not good, will generate more stress in the stiffener node, reduce the structural safety reserve, and even affect the service life of the bridge, Based on the Hudian Xisihe River Bridge in Hubei Province, the force characteristics of stiffened girder under four different consolidation schemes are studied. The variation of the cross-section stress of stiffened girders and the opening distance between the sections of adjacent stiffening girders is obtained. The best time for the temporary connection and permanent consolidation in the stiffening girder construction process.