波形钢腹板组合箱梁加载效率试验研究

体外预应力波形钢腹板组合箱梁是一种新型的钢-混凝土组合结构,其剪力主要由钢腹板承担,混凝土顶底板承受绝大部分弯矩;由于充分发挥了材料性能,提高了材料效率,有着很好的应用前景。为了研究波形钢腹板的加载效率,制作了2根模型梁,通过测试预应力张拉时结构应变和变形规律,利用空间有限元方法进行分析,试验结果与理论结果吻合较好,并得到了该组合结构在预应力作用下的加载效率规律。对不同厚度腹板的普通混凝土梁进行了参数对比分析,结果表明,波形钢腹板组合箱梁在预应力加载效率方面具有较强的优势。

Experimental Study on Loading Efficiency of Box Girder with Corrugated Steel Webs

The externally prestressed composite box girder with corrugated steel webs is a new type steel-concrete composite structure.The steel webs bear the most of the shear force,and the top and bottom concrete slabs bear the moment of flexure chiefly.The particular advantages of each material can be utilized sufficiently,so it will obtain extensive use in the future.The comparison between the loading efficiency due to prestressing of the finite-element analysis and the tests are satisfactory.Parametric studies are conducted to examine the effects of the type and thickness of the webs.The results indicate that the composite box girder with corrugated steel webs dominate over the aspect of the loading efficiency due to prestressing.