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对两个螺栓连接其连续梁的足尺受拉中心支撑钢梁框架(TOCBBTFs)进行试验研究。这种受拉中心支撑钢梁框架通过螺栓端板将冷弯方型管柱与H型钢梁相连,通常用于层数较少的预制安装建筑中。对两个2层1×4跨、受垂直荷载影响的受拉中心支撑钢梁框架施加循环的水平荷载,以测试其抗震性能。稳定分析发现其层间位移角达到1/10,循环性能显示线性响应(滑移范围和硬化响应)。循环支撑受压屈曲和受压屈服导致滞回衰退。研究受拉中心支撑钢梁框架的结构损伤、延性、刚度和剪力分布。此外,使用有限元软件ABAQUS研究受拉中心支撑钢梁框架的非线性性能。通过半刚性分析可有效预测其初始横向刚度和峰值层剪力。使用标准的数值模型可以推进对这种构造体系的进一步研究。
Two full-length TOCBBTFs with bolted continuous beams were tested. This tensioned center supported steel frame connects the cold-formed square columns to the H-beam through the bolt end plates and is typically used in prefabricated buildings with fewer layers. Two horizontal 1 × 4 span, vertical load imposed by the center of the tensioned steel girder frame to exert cyclic horizontal load to test the seismic performance. Stable analysis found that the drift angle between layers reached 1/10, and the cycle performance showed a linear response (slip range and hardening response). Circumferential compression buckling and yielding yield hysteresis recession. The structural damage, ductility, stiffness and shear distribution of steel-framed beams supported by tension center are studied. In addition, the finite element software ABAQUS was used to study the nonlinear behavior of steel girder supported by tension center. Semi-rigid analysis can effectively predict the initial transverse stiffness and peak shear force. Using a standard numerical model, further research on this tectonic system can be advanced.