长周期结构弹塑性能量谱模型及其应用研究

发布时间：2018-01-23 17:58

本文关键词： 长周期结构弹塑性分析特征滞回耗能能量谱模型能量平衡最大位移　出处：《建筑结构学报》2014年08期 　论文类型：期刊论文

【摘要】：选取44条远场地震波和20条近场大速度脉冲型地震波作为输入,对双线性单自由度系统进行非线性时程分析、总输入能量谱分析及滞回耗能谱分析。基于等延性准则建立了适用于长周期弹塑性结构的滞回耗能谱模型,模型由一个新的参数——特征滞回耗能系数来反映滞回耗能与总输入能量的比值、屈服力系数及位移延性系数之间的关系。基于能量谱模型及能量平衡原理提出了非弹性单自由度系统的位移预测方法。采用一个计算实例比较了所提出的平衡式与秋山宏能量平衡式、Leelataviwat能量平衡式的计算精度,验证了所提出的模型及方法的有效性。最后将提出的能量谱模型应用到某10层隔震结构算例中,结果表明分析过程简捷高效,且计算结果较为理想。
[Abstract]:Taking 44 far-field seismic waves and 20 near-field large velocity pulse seismic waves as input, nonlinear time-history analysis of bilinear single-degree-of-freedom systems is carried out. Total input energy spectrum analysis and hysteretic energy dissipation spectrum analysis. Based on the isoductility criterion, a hysteretic energy dissipation spectrum model for long-period elastic-plastic structures is established. The model reflects the ratio of hysteretic energy consumption to total input energy by a new parameter, characteristic hysteretic energy dissipation coefficient. The relationship between yield force coefficient and displacement ductility coefficient. Based on energy spectrum model and energy balance principle, a displacement prediction method for inelastic single-degree-of-freedom system is proposed. A calculation example is used to compare the proposed equilibrium formula. Energy balance with Akiyama macro. The calculation accuracy of Leelataviwat energy balance formula verifies the validity of the proposed model and method. Finally, the proposed energy spectrum model is applied to a 10-story isolated structure. The results show that the analytical process is simple and efficient, and the calculation results are ideal.
【作者单位】：上海大学土木工程系;
【基金】：国家自然科学基金项目(51308331,51278291) 上海市教委重点项目(11ZZ86)
【分类号】：TU311.3
【正文快照】： 0引言强震作用下建筑或桥梁结构的损伤破坏不仅仅取决于某个特定变量(力、变形等)的最大值,也和地震能量的传递、累积及耗散密切相关。准确估计分配在结构及构件的地震能量既可以为评价结构的抗震性能提供依据,也可以作为抗震设计的一种有效方法。但是地震能量计算过程较为复

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