multiple earthquake meaning in English

多重地震

Doctor candidate : yan qiwu supervisor : prof . slien pllsheng iii this thesis , a systematic theory on spatial elastic - plastic time - history analysis of reinforced concrete frame - tube structures tinder strong multiple earthquake excitations is established . covering problems about materal , rnember and structural system considering about the nonlinearity of material , geometry and boundary
木文考虑了材料、几何、边界非线性，建立了从材料、构件到结构的一个较为系统的钢筋砼框筒结构在多维地震波作用下的空间弹塑性时程分析理论。