组合梁钢与混凝土界面连接效应的精细化计算

为定量了解组合梁桥中钢与混凝土界面上各种连接效应的作用,提出一种能够考虑钢与混凝土界面上包括连接件效应、黏结效应和摩擦效应的计算分析方法,通过试验验证该方法是可行的.利用该方法计算分析了组合梁中不同连接效应对组合梁应力及钢与混凝土界面滑移的影响,也研究了考虑钢与混凝土界面黏结效应与否对组合梁各部分构件受力的影响,得知钢与混凝土界面黏结效应对组合梁中钢梁和混凝土的受力影响较少,但对连接件剪力影响较大,在不同荷载作用下剪力降低最大可达到25%.

Refined Calculation of Steel concrete Interface Connection in Composite Girders

In order to quantitatively reveal the combination of steel and concrete interface, an analysis method was provided for the calculation of composite girder considering connectors, bond stress and friction in the interface between the steel and the concrete. The feasibility of the method was also verified through the experiment. This method was used to analyze the relationship between different steel concrete connecting conditions and interface slip and also the effect of the present or not of the interface bonding on the mechanical behavior of the composite girder was analyzed. The results show that, the steel concrete interface bonding effect has a tine effect on the stress of the concrete slab and steel girder, but has a large effect on the shear force of the connectors where the maximum effect can reach 25 percent under different loads.