按部分剪力连接计算压型钢板-混凝土组合板承载力的简化方法

提出多种荷载作用下,简支压型钢板-混凝土组合板承载力的部分剪力连接简化计算方法。分析组合板纵向剪切破坏的部分剪力连接理论模型,阐明组合板纵向剪切破坏的机理,以及控制截面位置和极限荷载的求解思路。通过公式推导,分别得到了组合板在两点对称荷载和均布荷载作用下的承载力计算公式。在此基础上,提出点荷载和均布荷载共同作用下的组合板承载力计算方法,通过参数分析,对该方法进行简化,得到多个荷载作用下组合板承载力的简化计算公式。结合12个简支组合板的静力试验结果,进行公式验证,计算结果与试验值吻合良好。通过小比例滑块试验得到压型钢板与混凝土的界面强度参数,即可用该方法计算组合板的承载力。

A simplified calculation method for partial shear connection strength of composite slabs with profiled steel sheeting

A simplified method is presented for calculating the partial shear connection strength of a composite slab with profiled steel sheeting subjected to loads of various patterns. With the new partial shear connection strength model, the mechanism of longitudinal shear failure of a composite slab is explained, and the procedure for calculating the critical section location and the load capacity is proposed. Equations for predicting the load capacity under either symmetrical point load or uniform load are derived. The method of calculating the load capacity under both types of loads is proposed. Through parameter analysis, this method is simplified and calculation formulae are obtained. The results obtained from using this method are verified by test results of 12 specimens. Based on the interface strength parameters obtained from the small scale slip-block test, the strength of a composite slab may be calculated by using the proposed formulae.