The Softened-Truss Model of Low-rise RC Shear Wall with Concealed Truss
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摘要: 为了改善低剪力墙的抗震能力,提出了内藏桁架混凝土组合低剪力墙,并对其进行了低周反复荷载下的抗震性能试验研究.在试验研究的基础上,结合国内外已有的软化桁架模型理论建立了内藏桁架混凝土组合低剪力墙的软化桁架模型.该模型在内藏桁架混凝土组合低剪力墙的初裂阶段,其裂缝延伸方向垂直于混凝土主拉应力方向;在裂缝初裂后的发展过程中,其延伸方向受到内藏桁架的影响.计算结果与试验结果符合较好.Abstract: In order to improve the seismic performance of the low-rise RC shear wall,the idea of the low-rise RC shear wall with concealed truss was put forward.Cyclic loading tests of the low-rise RC walls with concealed truss were carried out.Based on the experiment and the existing softened-truss model,the softenedtruss model of shear wall with concealed truss was proposed.The new model considered that the inclination of the concrete crack was vertical to principal stress direction determined by external stress at early cracking,and was led by the concealed truss throughout its postcracking loading history.The results of calculation coincided with the test well.
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Keywords:
- reinforced concrete /
- composite shear wall /
- concealed truss /
- softened-truss model
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