三峡水电站左岸厂房上部网架结构整体分析  

INTEGRAL ANALYSIS ON THE SPACE TRUSS IN HYDROELECTRIC STATION FACTORY OF THE THREE GORGES

作　　者：董石麟[1] 李元齐[1] 

机构地区：[1]浙江大学土木系,浙江杭州310027

出　　处：《空间结构》2000年第4期3-10,共8页Spatial Structures

摘　　要：三峡水利枢纽是跨世纪的宏伟工程 ,其左岸主厂房内设有两台 1 2 0 0 T大桥机及两台 1 2 5T小桥机。屋盖结构采用正放四角锥网架。由于该网架结构支撑在下、下游墙体结构上 ,必须参与厂房结构的整体作用 ,且屋面荷载较大 ,因而与普通民用工程中的网架结构在受力上有较大区别。鉴于三峡工程的重要性 ,必须对其受力性能作整体分析。本文系统介绍了该网架初步设计及整体有限元分析的情况 ,并就网架结构在与上、下游墙体的不同连接方式下的整体受力性能及经济性作了比较。同时 ,本文还针对网架结构分析了简化计算结果与整体分析结果的差别。结果表明 ,网架结构与上、下游墙体之间的相互作用非常明显 ,必须进行整体分析。最后 ,根据分析结果 ,得出一些有价值的结论 ,供同类工程参考。Water conservancy of the Three Gorges is a grand project. Two huge bridge cranes with capacity of 1200T and another two bridge cranes with capacity of 125T are used in its hydroelectric station factory, and the load on the roof is very heavy. So the pyraimid space truss is used as the roof structure. But it is different from the common space structure because this space truss is supported on the upward and downward walls, and it must join in the integral load carrying of the factory structure. Considering the importance of the project, the factory structure must be analyzed integrally. In this paper, the design and integral FEM analysis are introduced, and the load carrying ability and economy under different connection ways between the space truss and the upward and downward walls are compared. At the same time, the difference between the results of simplified analysis and integral analysis is discussed. Research indicates that the interaction between the space truss and the upward and downward walls is obvious, and the integral analysis is very necessary. Finally, based on the results of analysis, some useful conclusions are drawn to give reference in the future. [

关 键 词：网架结构 受力性能 墙体结构 四角锥 屋面 屋盖结构 整体分析 左岸厂房 下游 三峡水电站 

分 类 号：TU356[建筑科学—结构工程] TV66[水利工程—水利水电工程]