高强钢-混凝土组合梁极限承载力有限元分析

Finite Element Analysis on Ultimate Bearing Capacity of High-strength Steel-Concrete Composite Girders

钢-混凝土组合梁是利用钢材受拉性能好,混凝土受压性能好的特点,将两种材料通过连接件结合成整体而共同受力的一种新型结构。它兼有钢结构和钢筋混凝土结构的优点,具有显著的技术经济和社会效益。为研究高强钢-混凝土组合梁中结构几何参数及材料强度对组合梁极限承载力的影响,建立了12根高强组合梁在跨中两点对称荷载作用下的有限元数值计算模型,对其极限承载力进行了分析。分析结果表明组合梁几何参数(包括混凝土翼板宽度和厚度)和材料强度(包括混凝土强度和钢梁的强度)对组合梁的极限承载力有较大影响。

The composite steel-concrete girder is a new type of structures using the characteristics of good steel tension property and good concrete compression performance to integrate the steel and the concrete by connectors and to bear the force together. This kind of girder has not only the advantage of the steel structure and the reinforced concrete structure, but also the remarkable economic and social benefits of technology. In order to study the influence of structural geometric parameters and material strength on the ultimate bearing capacity of composite girder in the high-strength steel-concrete composite girder, the finite element numerical calculation model of 12 high-strength composite girders is established under the deuce symmetrical loads in the span to analyze its ultimate bearing capacity. The analysis result indicates that the geometrical parameters(including the width and thickness of concrete wing plate) and the material strength(including the concrete strength and steel girder strength) of material strengths of the composite girder have the greater effects on the ultimate bearing capacity of composite girder.