【摘要】 节点是影响钢-混凝土组合结构体系受力性能的关键部件。现有的框架梁-柱节点试验研究多侧重于平面节点,而结构和构件在实际地震作用下都处于空间受力状态。节点在双向荷载作用下,可能表现出很强的空间耦合作用,其受力规律和破坏模式与平面节点均有所不同。分析了影响钢-混凝土组合节点受力性能的关键因素和基本规律,并重点对国内外有关空间梁-柱节点的试验装置、加载模式和主要研究成果进行介绍。分析表明:节点在双向荷载作用下的抗震性能通常要弱于平面加载节点,但目前关于空间组合节点的分析模型和计算方法尚不完善。最后,提出应针对不同组合节点的构造特点,进一步研究其受力机理并发展适用的设计方法,并加强空间节点试验方法的研究。更多还原

【Abstract】 The beam-column joints play a key role in composite steel and concrete structures.Most of the previous experimental research on beam-column connections focused on the in-plane behavior under unidirectional loading,which may not reflect the real behavior of structures and members subjected to multidirectional earthquakes.3D Joints may show significant spatial coupling effects under bi-directional loading.The resulting seismic behavior and failure patterns are different from those of 2D joints.In this paper,the key factors affecting the seismic behavior of composite steel-concrete joints are summarized.The test facilities,loading programs and the main results are reviewed.The analysis results show that the joints under unidirectional loading have better seismic performance than those under multi-directional loading in most experiments.The present analytical models need to be updated for better predictions of the seismic behavior of 3D joints.Further study is necessary on the mechanism and design principles of 3D composite joints according to the structural features.The multidirectional loading test method should be improved.更多还原