跨度800m凯威特型巨型网格结构在8度多遇地震作用下受力性能分析

发布时间：2018-11-23 10:37

【摘要】：以跨度800 m凯威特型巨型网格结构为研究对象,对其在多遇地震作用下的受力性能进行研究。基于位移权重系数和内力权重系数,对瑞利阻尼系数计算方法进行了修正。采用时程分析法对跨度800 m的凯威特型巨型网格结构进行了8度多遇地震作用下结构反应的计算,对其位移和内力反应进行了分析。结果表明:结构最大位移和最大内力的放大系数在1.1~1.2之间;通过对比振型截断法和振型过滤法,发现由振型过滤法确定的组合振型,可使多维反应谱法的计算结果精度更高且计算速度更快,应用多维反应谱法对结构进行计算,并与时程法的结果进行对比,由两种方法计算得到的内力及位移反应平均误差在10%左右,且反应包络线趋势一致。
[Abstract]:Taking the 800m Kewett giant grid structure as the research object, the mechanical behavior of the giant grid structure under the action of frequent earthquakes is studied. The calculation method of Rayleigh damping coefficient is modified based on displacement weight coefficient and internal force weight coefficient. The time history analysis method is used to calculate the structural response of the Cavette mega grid structure with a span of 800 m under the action of frequent earthquakes of 8 degrees, and the displacement and internal force responses are analyzed. The results show that the magnification factor of the maximum displacement and the maximum internal force of the structure is between 1.1 and 1.2; By comparing the mode truncation method and the mode filtering method, it is found that the combined mode shape determined by the mode filter method can make the calculation result of multi-dimensional response spectrum method more accurate and faster. The multi-dimensional response spectrum method is used to calculate the structure. Compared with the results obtained by the time-history method, the average error of the internal force and displacement response calculated by the two methods is about 10%, and the trend of the response envelope is the same.
【作者单位】：哈尔滨工业大学土木工程学院;哈尔滨工业大学结构工程灾变与控制教育部重点实验室;
【基金】：国家自然科学基金项目(51508132)
【分类号】：TU311.3

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