钢骨混凝土柱-钢筋混凝土梁环梁节点试验

本文提出了一种新型的钢骨混凝土柱-钢筋混凝土梁的新型环梁节点,并对其进行了试验研究。该节点传力途径为:框架梁剪力经环梁扩散传递给节点以下钢骨混凝土柱,框架梁端弯矩首先传递给环梁,环梁依靠整体拉压形成力偶将弯矩传递给钢骨混凝土柱。试验采用在柱顶施加恒定轴力的同时给框架梁端施加力或强制位移荷载的加载模式,分别进行了单调受弯试验、单调受剪试验和往复荷载试验。试验结果表明,这种环梁节点可以有效实现"强节点弱构件"的设计目标,具有良好的滞回耗能能力。

Experimental study on ring-beam connections of steel reinforced concrete columns and reinforced concrete beams

A novel ring-beam connection is proposed for steel reinforced concrete(SRC) columns and reinforced concrete(RC) beams.The force transfer mechanism is as follows: the shear forces and moments of the RC beams are firstly transferred to the ring-beam connections and then to the SRC columns.A series of tests are conducted to verify the applicability and effectiveness of the ring-beam connections.In the tests,vertical loads are firstly applied to the top of the columns to simulate the effect of the gravity,and then forces or forced displacements are exerted to the beams.The tests consist of two monotonic tests and four cyclic tests.The test results suggest that the ring-beam connections with appropriate design can satisfy strong connection weak beam requirement,and provide good energy-dissipation capability.