混合梁桥钢-混结合部的应用及关键技术

混合梁是钢-混凝土组合结构的一种。钢梁与混凝土梁在纵向通过连接件、承压板、预应力筋或锚杆等结合在一起。由于钢和混凝土刚度相差大,钢-混凝土结合部设计不当容易造成刚度过渡不平顺、局部应力集中等问题。收集整理国内外混合梁桥钢-混凝土结合部设计成果,并较系统地介绍钢-混凝土结合部的构造形式及其在桥梁结构中应用的新进展,以及需要研究的关键技术问题。

Application of Steel-concrete Combination of Compound Girder Bridge and Its Key Technology

The compound girder bridge is a kind of steel-concrete composite structure. The steel girder is combined with concrete girder longitudinally by connector, compression broad, pre-stressed reinforcement or anchor bolt. The failure design of steel-concrete combination is easy to cause the unsmooth rigidity transition and the local stress concentration due to the great difference between the steel and concrete rigidities. The paper collects the domestic and international design achievements of steel-concrete combination of compound girder bridge, and more systematically introduces the structural form of the steel-concrete combination and its new application progress in the bridge structure as well as the key technical issues necessary to be studied.