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考虑强余震的钢骨混凝土柱抗震性能试验研究

DOI: 10.13197/j.eeev.2015.05.167.xuy.025, PP. 167-173

Keywords: 钢骨混凝土,,余震,抗震性能,低周往复加载静力试验

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Abstract:

为了研究强余震对结构构件抗震性能的影响,设计了2个工字钢型钢混凝土柱,进行了10次循环加载和损伤后试件再次加载的低周往复加载静力试验。试验研究表明随着循环加载次数的增加和试件的损伤,试件的滞回环面积、强度、刚度和等效黏滞阻尼系数等指标均呈现减小趋势,试验模拟的强余震作用导致试件的耗能能力和抗震性能出现劣化;在达到试件的承载能力极限状态前,第5次循环加载后各抗震性能指标曲线均趋向于稳定;超过试件承载能力极限状态后,循环加载次数的增加使试件的抗震性能指标出现不收敛。试验研究为揭示强余震对结构构件抗震性能的不利影响,完善抗震试验方法和抗震设计相关理论提供了数据支持。

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