作　　者： ; ; ; ;

机构地区： 上海大学土木工程系

出　　处： 《建筑结构学报》 2014年第8期15-22,共8页

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。 The single-degree-freedom( SDOF) system with bilinear model were analyzed by nonlinear time history analysis,total energy spectrum analysis and hysteretic energy spectrum analysis under 44 far field ground motions and20 near-field and high-speed pulse seismic waves. A hysteretic energy spectrum model for long-period elasto-plastic structure was established according to constant ductility criterion. A new index based on characteristic hysteresis energy coefficient considering relationship of hysteretic energy,ductility and strength was proposed. Equivalent speed spectrum of total energy for single degree freedom( SDOF) system was established. Based on equivalent speed spectrum and energy balance,the maximum displacement of SDOF system was predicted. Akiyama energy balance formula,Leelataviwat energy balance formula and proposed energy balance formula by authors were compared by using a SDOF example. The suitability and calculation accuracy of proposed model and method were verified. The application of energy spectrum model was described by using a 10-story high-rise isolated structure engineering example. The results show that the calculation process using the proposed method is easy and efficient,and results are acceptable.

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

领　　域： [建筑科学]