双钢板混凝土单元平面内屈服准则

In-Plane Yield Criterion of Steel-Concrete-Steel Unit Panel

针对承受平面内薄膜内力的双钢板混凝土(Steel-Concrete-Steel, SCS)单元,基于固体力学的3个基本方程(平衡条件、变形协调条件以及本构方程),提出了满足钢板Tresca屈服准则的SCS单元平面(主)应力空间的屈服准则.提出了一种结合试验数据确定SCS单元屈服荷载的计算方法,并将该方法应用于SCS单元双向拉压试验,分析9个不同配钢率和不同拉压比的SCS单元试件,将SCS单元的屈服准则与试验结果进行对比.此外,采用Ozaki的7个剪切单元试件进行进一步验证.结果表明,SCS单元的屈服准则与试验结果具有较好的一致性.

A yield criterion for the steel-concrete-steel(SCS) unit panel subjected to in-plane membrane forces is proposed, which is expressed in the in-plane(principal) stress space and follows the Tresca yielding principle for steel plates. This yield criterion for the SCS unit panel is based on the Navier’s three principles(equilibrium conditions, strain compatibility, and the constitutive laws of materials). A calculation method for determining the yield load of the SCS unit in combination with the test data is proposed, and the method is applied to the bidirectional tensile and compression test of the SCS unit. By using this method, nine SCS tested panels with different steel ratios and different tension compression ratios are analyzed, and the yield criterion of the SCS unit is compared with the test results. In addition, seven SCS shear specimens tested by Ozaki are used for further verification. The results derived from the yield criterion of the SCS panel elements are found in good agreement with the test results.