钢管混凝土界面附近的局部承压实验研究

为了保证钢管混凝土梁柱节点剪力的可靠传递，常需在钢管内设置抗剪连接件。抗剪连接件的承载能力与其下混凝土的局部承压强度有关，为此，本文进行了２１个钢管混凝土在界面附近的局部承压试验，局压垫板形状分为环形和花瓣状条形，以模拟环形和钉形抗剪连接件。根据试验结果，探讨了钢管混凝土界面附近局部承压的工作机理，并给出了计算公式。

Experimental Study on Bearing Strength of Concrete near the Interface of Steel Tube and Concrete Core

In order to transfer the beam load reliably at the beam column connection in a concrete filled steel tubular structure,shear connectors are often used in the steel tube,and the load bearing capacity of connectors is related to the bearing strength of concrete In the paper,21 tests on the bearing strength of concrete under load near the steel tube/concrete core interface were conducted The loading plates have the ring and flowery strip shapes to imitate the connectors of steel plate ring,bar ring and bar nail Based on the test results,the working mechanism of concrete bearing strength near the concrete/steel interface is explored and formulas used to calculate the bearing strength of concrete are presented