波形钢腹板导梁局部承压的加强构造与试验

发布时间：2018-05-09 16:47

  本文选题：波形钢腹板导梁 + 局部承压　； 参考：《工程力学》2017年S1期

【摘要】：直接使用组合梁中的波形腹板钢梁作为顶推导梁,在局部压力作用下钢梁的承载力较弱,而且钢梁与桥梁支座之间存在间隙,为此提出提高波形腹板钢导梁局部承压的加强构造。为进一步研究波形钢腹板导梁在承受局部压力作用时的受力特性,设计制作3组缩尺模型试验,测试了不同加强构造下导梁在局部压力作用下破坏形态和极限承载力。研究表明:试件破坏形态均为支座范围内波形腹板局部压溃,设置钢靴能够明显提高波形腹板导梁的局部承压性能和结构延性,特别是设置箱形钢靴的效果要优于工字形钢靴,二者分别使导梁极限承载力提高了58%和12%。
[Abstract]:When the corrugated web steel beam in the composite beam is directly used as the top derivation beam, the bearing capacity of the steel beam is weak under the action of local pressure, and there is a gap between the steel beam and the bridge support. For this reason, a strengthening structure is proposed to improve the local bearing pressure of the corrugated web steel guide beam. In order to further study the mechanical characteristics of the guide beam of corrugated steel web under local pressure, three groups of scale model tests were designed and made to test the failure pattern and ultimate bearing capacity of guide beam under local pressure under different reinforced structures. The results show that the failure pattern of the specimens is local collapse of the corrugated web in the support range, and the local bearing capacity and the structural ductility of the guide beam of the corrugated web can be obviously improved by setting the steel boot, especially the effect of setting the box steel boot is better than that of the I-shaped steel boot. The ultimate bearing capacity of the guide beam is increased by 58% and 12% respectively.
【作者单位】： 同济大学土木工程学院桥梁工程系;
【分类号】：TU398.9
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本文编号：1866785