新型铝合金板式节点力学性能研究

Research on mechanic performance of a new type of aluminum alloy plate joint

装配式节点往往是结构中的薄弱点,决定着整个结构体系的安全,传统铝合金节点由于节点域腹板间断,荷载传递路径不明确,对结构的整体承载性能造成影响。为了改善节点的连接方式,本文提出了一种新型圆柱形抗剪键连接的板式节点,通过SolidWorks与WorkBench结合进行了数值模拟,对传统节点与新型节点的破坏模式及极限承载力进行了对比分析,在此基础上考虑了平面2支工字梁与空间6支工字梁的加载区别,并对抗剪键连接板的螺栓数量进行了参数分析。模拟结果表明:新型节点的破坏模式主要表现为下翼缘的拉剪破坏和工字梁的扭转屈曲破坏;节点6支工字梁较2支工字梁在进入非线性阶段后受到的约束反力更小,稳定性更好;传统研究中采用2支工字梁进行试验和模拟的结果不能准确模拟6支工字梁的空间作用;抗剪键连接板取8孔螺栓对提高承载力更为显著。分析结果将为新型铝合金板式节点在实际工程中的应用提供理论依据。

Assembled joints are often weak points in the structure,which determines the safety of the entire structural system.Due to the discontinuity of the webs in the joint domain,the load transfer path is not clear,which affects the overall bearing performance of the structure.In order to optimize the connection mode of the joints,a new type of cylindrical shear-bonded plate joint is proposed.Through the combination of using SolidWorks and WorkBench,the damage mode and ultimate bearing capacity of the traditional joints and the new joints are compared and analyzed.On this basis,the loading difference between two I-beams and six I-beams is compared,and the parameters of the bolts of the shear-bonded plates are analyzed.The simulation results show that the failure mode of the new type of joint is mainly caused by the shear failure of the upper cover and the torsional buckling failure of the I-beam.Compared with two I-beam joints,six I-beam joints suffer less restraint reaction and better stability after entering the non-linear stage.In the traditional research,two I-beams were used to test and simulate the results,which could not accurately simulate the spatial effects of six I-beams.The 8-hole bolt for the shear connection plate is more significant to improve the bearing capacity.The analysis results will provide a theoretical basis for the application of the new type of aluminum alloy plate joints in practical engineering.