采用螺栓连接的工字形全装配式RC剪力墙试验研究

采用连接钢框、高强度螺栓将带有内嵌边框的纵横向预制钢筋混凝土（RC）剪力墙连接起来，形成工字形剪力墙。为研究该全装配式剪力墙的受力性能和抗震性能，进行了3榀墙体的单调加载试验和1榀墙体的低周反复荷载试验，分析了该全装配式工字形剪力墙的承载能力、刚度、延性性能、耗能能力、连接件的应变分布以及连接件间的相对滑移等，最后探讨了试件的极限抗剪抵抗机制。研究结果表明:该全装配式剪力墙具有较高的承载能力、较好的延性性能以及耗能能力，位移延性系数约为3~6；高强度螺栓的直径、连接钢框钢板的厚度对装配式剪力墙的抗侧刚度及峰值荷载有一定的影响；内嵌边框既传递了分布钢筋的应力，也起到了约束混凝土、增加RC剪力墙延性性能的作用。

EXPERIMENTAL STUDY ON I-SHAPED PRECAST REINFORCED CONCRETE SHEAR WALLS USING BOLTED CONNECTIONS

The longitudinal and transverse prefabricated reinforced concrete (RC) wall panels with embedded limbic steel frames are jointed together using connecting steel frames and high strength bolts, forming I-shaped shear walls. To investigate the mechanical behavior and seismic performance of this total-prefabricated shear wall, monotonic loading tests on three specimens and a low-cyclic reversed loading test on one specimen were carried out. The load bearing capacity, lateral stiffness, ductility, energy-dissipating capacity, strain distribution in the connecting components and the relative slippages within the connecting components were subsequently investigated. Then the ultimate anti-shearing mechanism of the test walls was discussed in detail. The research results show that the total-prefabricated shear wall possesses high load bearing capacity, favorable ductility and energy-dissipating capacity. The displacement ductility factor is about 3 to 6. The nominal diameter of the high strength bolt and the thickness of the steel plates in the connecting steel frame have effects on the lateral stiffness and the ultimate bearing capacity of the prefabricated shear wall. The embedded limbic steel frame not only transfers the stress in the distributing steel bars, but also confines the concrete, resulting in superior ductility of the shear wall.