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针对早期修建的悬挂式桥面系钢管混凝土拱桥刚度不足问题研究其刚度补强方法。以某大桥加固工程为例,根据实桥桥型特点提出了增强桥面系整体性、增强拱肋刚度及加强横撑等加固方案,通过有限元软件建立原桥及各加固方案的桥梁计算模型,分析原桥和加固后桥梁的自振频率,明晰了各种构造因素的改变与桥梁整体刚度变化之间的规律,提出了简洁有效的桥梁整体横向刚度补强措施。
Aiming at the lack of stiffness of the bridge deck arch bridge of the early construction, this paper studies the stiffness reinforcement method. Take the reinforcement project of a bridge as an example, according to the characteristics of the bridge, the bridge reinforcement model is proposed to enhance the integrity of the bridge deck, enhance the stiffness of the arch rib and strengthen the transverse bracing. The bridge calculation model of the original bridge and each reinforcement scheme is established by finite element software The natural frequencies of the bridge and the bridge after reinforcement are analyzed. The rules between the changes of various structural factors and the overall stiffness of the bridge are clarified. A simple and effective bridge lateral rigidity reinforcement measure is proposed.