独乐寺辽代建筑结构分析及计算模型简化

针对独乐寺辽代建筑铺作层的结构作用,应用Ansys软件建立独乐寺山门的实体模型,总结出结构在竖向荷载作用下,内力沿铺作中连接构件"斗"的连线斜向传递的规律.提出将此类结构的计算模型简化为杆系模型的原则,即沿传力路径布置杆件,将铺作简化为斜撑与桁架结构.通过山门实体模型与杆系模型在自重荷载下的应力分布比较,表明在竖向荷载作用下主要结构构件的内力计算中,杆系模型可以取代实体模型.使用上述简化原则建立观音阁杆系计算模型,将观音阁自振频率计算值与实测值进行比较,表明简化模型亦可用于自振频率的估算.

Structural analysis and modeling simplification of Liao-dynasty structures in Dule Temple

The structural characteristics of the bracket sets layer in the Liao-dynasty wooden architecture of Dule Temple is studied by analysing the solid modeling of the Gate of Dule Temple using the software Ansys.Under vertical loads,the internal forces are found to transfer alone the direction linking the joint structure Dou.Principles of simplification from a solid modeling to beam-element modeling are suggested,i.e.,allocating beams along the internal force transfer path,and simplifying the bracket sets into inclined struts and trusses.Comparison between the results of the solid modeling and the simplified beam-element modeling of the gate shows that,the latter can replace the former in internal forces calculation under vertical loads.A beam-element modeling of Kwan-yin Pavilion is built according to the above-mentioned principles.Comparison between the modeling calculation result and the survey result of the self-excited oscillation frequencies of Kwan-yin Pavilion shows that the proposed simplified modeling can also be used for estimating the structural oscillation frequencies.