板桁组合结构分析的超级有限元法  

Static Analysis of Plate truss Composite Structure by Super Finite Element

作　　者：张凤鸣 熊健民[1] 周金枝[1] 余天庆[2] 

机构地区：[1]湖北工学院机械工程系,湖北武汉430068 [2]湖北工学院土木工程系,湖北武汉430068

出　　处：《湖北工学院学报》2000年第1期21-23,共3页

摘　　要：针对板—桁组合结构的静力分析问题 ,根据桁梁桥弯曲扭转理论 ,将复杂的离散型结构进行准三维化处理 ,使其离散成一系列梁段单元超级元 .考虑到弯曲扭转拉伸压缩等多种变形效应 ,再将超级元离散成板单元和空间杆单元 ,按一般有限元法选取其自由度 ,通过采用构件自由度向超级元自由度转换 ,把复杂多构件问题的求解 ,变为少量一维节点变量问题的求解 .这种简捷有效的超级有限元法 ,既达到了简化计算过程的目的 ,又保证了计算精度 ,而且可以方便地和一般有限元法结合使用 .Plate truss composite structure is a new pattern of structure used in bridges. It is made up by many concrete plates and truss beams.Based on the analysis of this structure by regular finite elements, and GH Lies Truss bridge theory, the paper analyses the mechanics properties of this structure by super elements, and gives the formulas for the analysis. Super finite element is a new type of digital analysis method.In many cases good approximations are obtained,and computing time,costs and storage requirements are saved by applying the super finite elements as compared with regular finite elements, specially for the composite structures.

关 键 词：超级有限元法 板桁组合结构 超级元 静力分析 

分 类 号：TU398.901[建筑科学—结构工程] TU973