【摘要】 以40 m跨度K6型单层球面网壳为研究对象,采用时程分析法对大跨空间网壳结构进行了多维多点输入和单点一致输入下的地震响应分析,比较了2种地震荷载作用下的结构响应;将大跨空间网壳结构中受力较大的杆件替换为压电智能杆件,对比分析了多维多点输入下结构安装压电智能杆件前后的地震响应变化。结果表明:多维多点输入相对单点一致输入对大跨空间网壳结构会产生更加不利的影响,在网壳结构的抗震设计中是必须考虑的;安装压电智能杆件后结构多数杆件的地震响应明显减小,达到了稳定控制的效果。更多还原

【Abstract】 The seismic response of 40 m span of K6 single-layer reticulated shell was analyzed in the conditions of multi-dimensional and multi-support excitations,and simple support excitation respectively based on the time history analysis method.The structural responses under the two forms of earthquake loads were compared.Piezoelectric intelligent bars were installed at the weak parts of the long-span space reticulated shell structures.The seismic response changes of the structures before and after the installation of piezoelectric intelligent bar were compared under multi-dimensional and multi-support excitations.The results show that multi-dimensional and multi-support excitations on long-span space reticulated shell structures will have more adverse impact than single support excitation and thus could be considered in design process.The seismic response of the majority bars reduce significantly after the structure installing the piezoelectric intelligent bars,which reach the effect of structure intelligent stable control.更多还原