【摘要】 本文根据新型大跨空间杂交结构———索承网壳结构的受力特点,选用梁元、杆元和索元的混合有限元模型,给出了一种有效的适用于该类结构的非线性动力响应的增量、迭代有限元计算方法。以K8型索承网壳结构为研究对象,进行了时域内的三向地震作用下的非线性反应分析。计算结果表明,该结构具有良好的抗震性能。文中针对地震响应的主要影响参数,对其地震响应规律作了系统的研究,得出矢跨比和撑杆长度是抗震设计的主要控制参数等有应用价值的结论。更多还原

【Abstract】 Based upon the force-bearing characteristics,the combined finite element model of beam elements,truss elements and cable elements is selected,and an incremental-iterative nonlinear finite element technique is developed to analyse the dynamic response of the long span hybrid spatial structure of cable-supported lattice shells.The seismic analysis is carried out by step-by-step method in the time domain with inputting the three-dimensional earthquake ground motion for a K8 type cable-supported lattice shell.The results indicate that the structure has a good seismic performance.In addition,the rules of seismic response are systematically studied by means of changing the main parameters of the structure.Finally the conclusion is drawn that the rise-span ratio and the lengths of bars are the main control parameters for seismic design.更多还原