摘要
以双层球面网壳为研究对象,分析了其结构随参数变化的自振特性,采用Newmark积分法对其进行地震时程响应分析,在此基础上分别研究了铝合金双层网壳与钢双层网壳结构在竖向地震荷载作用下结点随参数变化的位移响应及其杆件轴向应力响应.研究结果表明,铝合金网壳与钢网壳在结构相同的情况下,其自振特性基本相同,对地震荷载引起的位移响应,铝合金网壳要略大于钢网壳,而铝合金网壳杆件轴向应力远远小于钢网壳,因此用铝合金取代钢材具有可行性.
The natural vibration characteristics of doublelayer spherical reticulated shell with various structural parameters are analyzed. Then, based on the Newmark integral method, the responses of both node displacement and axial stress of rods to the variation of structural parameters are investigated for both the aluminum alloy and steel doublelayer spherical reticulated shell under vertical seismic load with seismic timehistory response method. The analysis results show that the natural vibration characteristics with the both shells of identical structure are basically the same, but, as for the displacement response to the seismic load, it is faster for the aluminum alloy reticulated shell than for of steel reticulated shell. At the same time, the axial stress in the rods of aluminum alloy reticulated shell is much lower than that of steel reticulated shell. So it is reasonable to use aluminum alloy to replace steel.
出处
《甘肃工业大学学报》
北大核心
2003年第3期110-112,共3页
Journal of Gansu University of Technology
基金
广东省自然科学基金(990148)
广东省教育厅自然科学重点项目(200027)
