胶合木框架-CLT剪力墙结构抗震性能试验

Experiment on Seismic Behavior of CLT Infilled Glulam Frame Structure

为了研究设置正交胶合木(CLT)剪力墙对胶合木框架抗侧力性能的影响,本文对一榀胶合木纯框架结构和一榀胶合木框架–CLT剪力墙结构的缩尺构件分别进行了低周反复荷载试验,框架和剪力墙之间的连接采用了新型的植筋和角钢混合连接。深入探讨了两种结构的破坏形态和破坏机理,并对试验现象、极限承载力、抗侧刚度和耗能能力等进行了全面分析。试验结果表明:木结构梁柱框架和CLT剪力墙能够很好地协同工作,胶合木梁柱框架–CLT剪力墙结构的抗侧刚度大、极限承载力高、耗能性能好,其极限荷载、抗侧刚度和耗能分别为木结构纯框架的2.45倍、3.65倍和2.4倍,结构性能提高效果显著。此外,植筋–角钢混合连接的引入也显著提高了结构的耗能能力。

To investigate the lateral resistance of glulam frame structure infilled with cross laminated timber(CLT)shear walls,two kinds of small-scale specimens are tested under reversed cyclic loads.One specimen is bare glulam frame and the other is CLT wall infilled glulam frame.An innovative hybrid joint which combined glued-in rods with angle steel is introduced to connect timber frame and CLT shear wall.Failure modes and failure mechanisms are discussed in detail.And the experimental phenomena,ultimate bearing capacity,lateral stiffness and energy dissipation are analyzed comprehensively.Test results show that the glulam frame and the CLT shear wall can work together very well.And the ultimate bearing capacity,lateral stiffness and the energy dissipation capacity are respectively 2.45,3.65 and 2.4 times of that of bare timber frame structure,which shows an obvious improvement on structural behaviors.Meanwhile,hybrid joint also significantly enhances the energy dissipation capacities of the structure.