【摘要】 以实际工程为例,进行了四种不同网架方案的比较,分析了双层网架与三层网架的受力规律;通过支承体系与网架的整体建模和协同作用分析,给出了支承柱受力情况;详细研究了三层网架的动力特性,比较和总结了三层网架地震内力影响系数,三层网架在竖向地震和水平地震作用下各层杆件的动内力分布规律。研究表明,三层斜放四角锥网架结构具有优越的受力性能,并且用钢量低,是大跨度矩形平面屋盖的合理结构形式。研究成果为工程设计和该类结构推广具有重要的指导意义。更多还原

【Abstract】 Taking an example of an actual project,a variety of grid programs were systematically compared and analyzed,and the force behavior of double-layer grids and triple-layer grids were proposed.Through overall modeling,the synergistic effects between the support system and grids were analyzed,and the force behavior of support columns were given.Dynamic characteristics of triple-layer grids were also studied,and the influence coefficient of seismic internal force on triple-layer grids was concluded.It shows that the triple-layer quadrangular pyramid grids were reasonable structural style for the large-span roofs due to superior mechanical properties and low steel consumption.The research results provide an important guiding significance for engineering design and the development and expansion of this kind of structures.更多还原