【摘要】 针对结构多点激励问题的研究现状,分别介绍了地震动时空变化性、多点激励分析基本方法、地震动记录校正以及多点激励对结构的影响。首先阐述了地震动时空变化性及主要表现形式,并提出了最不利行波概念;其次介绍了多点激励分析的基本方法,并指出了3种确定性方法的优缺点和适用性;然后论述了多点激励对地震动时程的基本要求:地震动加速度记录的校正问题;接着简要介绍了多点激励对结构的复杂影响,并指出这种影响取决于拟静力反应项和动反应项的相互关系。最后,对结构多点激励分析有关问题提出了展望和建议。更多还原

【Abstract】 This paper gives a general review and summary on dynamic analyses of structures under multi-support excitation according to recent researches.Firstly,the spatial variations of ground motions and the effect of critical traveling waves are presented.Secondly,the review and the remark on methods used in analyses are given.Thirdly,the importance for correcting ground motion records is discussed.Then,the seismic response characteristics of the structures under the multi-support excitations are summarized.Finally,some advice is given in future investigation.更多还原