基于边界表达技术结构构件相交关系简化算法和节点优化  

Brep-based simplified algorithm and nodes optimization for intersection relationships among structural components

作　　者：刘照球[1] 李云贵[2] 吕西林[1] 张汉义[2] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]中国建筑科学研究院,北京100013

出　　处：《建筑结构学报》2010年第9期58-62,共5页Journal of Building Structures

基　　金：国家"十一五"科技支撑计划重点项目(2006BAJ01B01-01)

摘　　要：对工程设计中的建筑模型、结构模型以及结构力学分析模型之间的关系和采用边界表达技术描述的结构构件的空间拓扑关系进行分析,提炼与结构分析相关的构件几何关系。针对基于三维的建筑模型到结构模型转换过程中信息失真问题,结合空间直线段与三角形面片相交的数学推论,提出一种判断三维构件之间相交关系的简化算法,并基于此简化算法分别对线性和面类构件之间的相交节点进行归类和优化处理,并对各类构件之间相交节点定义优先权的程序算法进行设计。通过程序对简化算法和节点优化方法进行实例应用,结果表明,该方法有助于建筑结构模型转换中对基本构件信息正确地提取和定位,对促进工程设计中的协同工作具有一定的参考价值。The evolvement process from architectural model to structural and mechanical model in the engineering design field was analyzed.The geometrical intersection relationships of structural components were extracted from the Brep（Boundary representation）-based spatial topological relationships,which contributed to analyzing the structural mechanical properties.A simplified algorithm was presented in the paper for deducing the intersection relationships among structural components.Based on proposed algorithm,the nodes among intersection components were optimized,along with validation of the theory through an application example.The results show that the theory presented in this paper can help to convert data accurately from architectural model to structural model.

关 键 词：边界表达技术 结构分析 相交算法 节点优化 

分 类 号：TU311.41[建筑科学—结构工程]