A highly efficient and accurate stochastic seismic analysis approach for structures under tridirectional nonstationary multiple excitations

A highly efficient and accurate stochastic seismic analysis approach for structures under tridirectional nonstationary multiple excitations
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一种高效、准确的三向非平稳多重激励下结构随机地震分析方法

DOI:
10.1016/j.compstruc.2014.07.017
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发表时间:
2014-12
影响因子:
4.7
通讯作者:
ey, Mahesh D.
ey, Mahesh D.
中科院分区:
工程技术2区
文献类型:
--
作者:
Jia, Hong-Yu;Zheng, Shi-Xiong;Xie, Wei-Chau;P;ey, Mahesh D.

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本文提出了一种改进的高精度直接积分法(I-HPDIM)和一种面向绝对响应的虚拟激励法(PEM),用于大型结构在三向非均匀调制空间地震动作用下的非平稳随机地震反应分析。所提出的方法解决了传统HPDIM的瓶颈问题,并显着提高PEM和HPDIM的计算效率,使所提出的非平稳随机分析方案更有吸引力的工程目的。因此,它已被实施在一般的有限元平台,具有强大的和通用的建模和分析能力,随机地震分析的大型和复杂的结构下三向非平稳空间地震运动。
This paper proposes an improved high precision direct integration method (I-HPDIM) and an absolute-response-oriented scheme of pseudo-excitation method (PEM) for nonstationary stochastic seismic analysis of large structures under tridirectional nonuniformly modulated spatial ground motions. The proposed approaches resolve the bottle-neck problem of conventional HPDIM and significantly improve computational efficiency of both PEM and HPDIM, making the proposed nonstationary stochastic analysis scheme more attractive for engineering purposes. Hence, it has been implemented in general finite element platforms, having powerful and versatile modelling and analysis capabilities, for stochastic seismic analysis of large and complex structures under tridirectional nonstationary spatial seismic motions.
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