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工程力学  2014 

加载制度对新型型钢混凝土柱的抗震性能影响

DOI: 10.6052/j.issn.1000-4750.2012.10.0762, PP. 152-159

Keywords: 新型型钢混凝土柱,加载制度,数值模拟,双轴耦合作用,抗震性能

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Abstract:

采用有限元软件对新型型钢混凝土(SRC)柱抗震性能进行了数值模拟,通过与试验结果的对比,验证了模型的正确性。通过大量的数值模拟,研究了加载路径、循环次数、位移幅值增量及变轴力对新型型钢混凝土柱抗震性能的影响。由于柱内存在双轴耦合作用,双轴往复荷载作用下较单轴往复荷载作用下柱的抗震性能明显降低,表明加载路径对柱的抗震性能影响显著;屈服荷载前循环次数对柱骨架曲线的影响很小,屈服荷载后影响显著,循环次数越多其峰值荷载及其对应的位移和位移延性越小,但其耗能越大;双轴往复荷载作用下位移幅值增量对柱抗震性能的影响较单轴往复荷载作用下的显著,屈服位移、屈服荷载、位移延性系数随位移幅值增量的增大而增大,但其耗能减小;在变轴力作用下柱表现出明显的不对称性,且其抗震性能明显较定轴力作用下更为不利。

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