000019830 001__ 19830
000019830 005__ 20170118182338.0
000019830 04107 $$aeng
000019830 046__ $$k2017-01-09
000019830 100__ $$aZhao, Qiuhong
000019830 24500 $$aSimulation of Multi-Support and Multi-Component Spatially Variable Ground

000019830 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019830 260__ $$b
000019830 506__ $$arestricted
000019830 520__ $$2eng$$aSpatially variable ground motions should be considered during the seismic response analysis of large-span structures. Based on original spectral representation method (SRM), a simulation method is developed with reasonable spectral density function, coherency function and site transfer function considering spatial correlation ， for the non-stationary multicomponent and multi-support ground motions on both the bedrock and the ground surface of an engineering site, which has varying soil conditions at different structural supports. Two numerical examples are presented to demonstrate the proposed method. Each generated ground motion time history is compatible with the derived power spectral density at a particular point on the site, and any two of the ground motions are compatible with a model coherency function. Results show that amplification and filtering effects on the incident wave from local site conditions lead to obvious changes in the amplitude and frequency components, even much greater than changes caused by wave passage effects and coherency effects under specific site conditions. Hence it’s necessary to use non-uniform spatially variable ground motions with rational consideration of local site effects, when choosing the input for seismic analysis of large-span structures. Simulation of multi-support and multi-component ground motions can be simplified to three independent multi-support one-dimensional ground motions, owing to the critical value of coherency functions through numerical method. Therefore, this simulation method offers an effective way for determine seismic input for the seismic response analysis of large-span structures in practice.

000019830 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019830 653__ $$aSpatial variation; synthetic ground motions; Site effect; Multi-support excitation; Power spectral density

000019830 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019830 720__ $$aZhao, Qiuhong$$iLi, Xiaoqiong$$iLi, Zhongxian
000019830 8560_ $$ffischerc@itam.cas.cz
000019830 8564_ $$s3069971$$uhttps://invenio.itam.cas.cz/record/19830/files/4501.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4501.
000019830 962__ $$r16048
000019830 980__ $$aPAPER