不锈钢芯板一字形剪力墙抗震性能试验研究

Experimental research on seismic behavior of the I-shaped shear wall of stainless steel core plate

为研究不锈钢芯板一字形剪力墙的抗震性能,完成了在不同轴压比、不同面板厚度以及不同芯管排布下,四个不锈钢芯板一字形剪力墙构件的拟静力试验,研究了构件在低周往复荷载作用下的变形特征和破坏模式,分析了构件在水平荷载作用下滞回曲线、骨架曲线、荷载特征值、延性系数、刚度退化、承载力退化以及耗能能力等抗震性能。试验结果表明:不锈钢芯板一字形剪力墙发生压弯破坏,且破坏形态均表现为构件根部位置的侧板与面板发生局部屈曲;面板厚度越大,承载力越高;当构件面板与侧板厚度相同时,可以保证面板与侧板能够协同工作,有较好的延性以及耗能能力;作为墙体两侧面板的连接件,芯管排布对构件抗震性能影响不大;增大轴压比会抑制面板的鼓曲,但会降低墙身的延性与耗能能力。

In order to research the seismic behavior of the I-shaped shear wall of stainless steel core plate,four specimens were conducted by quasi-static tests under different axial compression ratio,different panel thickness and different core tube arrangement,to study the deformation characteristics and failure mode under low cycle reciprocating load,and analysis the load-displacement curves,skeleton curves,load characteristic values,ductility coefficient,stiffness degradation,bearing capacity degradation and energy dissipation capacity.The test results show that the I-shaped shear wall of stainless steel core plates all fail in a compression-bending mode,and the failure location and mode are the local buckling of the side plate and the panel at the root position on both sides of the test piece.The thicker the panel of the I-shaped shear wall of stainless steel core plate is,the larger the bearing capacity is.When the thickness of the panel of the test piece is the same as the side plate,the cooperation between the panel and the side plate of the I-shaped shear wall of stainless steel core plates can be ensured in the same work and have better ductility and energy dissipation capacity.As the connection of the panels on both sides of the wall,the arrangement of the core tubes has little influence on the seismic performance of the components.Increasing the axial compression ratio will inhibit the buckling of the panel,but will reduce the ductility and energy dissipation capacity of the wall.