钢塔架结构静力计算的分层空间桁架法研究  

Study on the Layered Space Truss Method on Static Calculation of Steel Tower Structure

作　　者：夏大桥[1,2] 尹昊[3] 王谦[2] 王建磊[2] 赵海龙[2] 

机构地区：[1]西安理工大学,710048 [2]中广电广播电影电视设计研究院,北京100045 [3]清华大学土木工程系土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《特种结构》2014年第4期61-66,共6页Special Structures

摘　　要：通过理论推导,得出在满足分层空间桁架法基本假定条件下的计算公式,用空间桁架法设计塔架,对比分析刚性、柔性斜杆塔架的区别。同时,推导了三角形截面塔架的内力及位移计算公式,用分层空间桁架法及逐次渐进法计算四种截面形状的刚性结构及柔性结构的内力,用规范方法进行构件验算,得到应力比处于0.75~0.85之间时的结构用钢量;并得出如下结论：刚性斜杆塔架及柔性斜杆塔架用钢量基本一致,两种塔架应力比处于同一水平时刚性斜杆塔架刚度较大;由承载力控制时,按照两种形式斜杆设计的塔架用钢量基本相同,由刚度控制时,采用刚性斜杆有助于降低结构用钢量。The purpose of this study is to obtain the design formulas on the condition that the basic assumptions of layered space truss method were met, and to design several towers with this method in order to contrast the difference between rigid bracing and flexible bracing tower. Meamwhile the design formulas of internal forces and displacements of triangular cross-section tower were analyzed, and four towers with different cross sections o frigid and flexible bracing respectively were analyzed with layered space truss method. The members were checked with the code for design of steel towers, and the steel consumption of the structure with stress ratio between O. 75 and 0.85 was obtained. It was concluded that：The steel consumption of rigid bracing and flexible bracing tower were basically the same, and the stiffness of rigid bracing tower is greater when the stress level was roughly the same. The steel consumption of rigid bracing tower is near to the flexible bracing tower under the same design conditions, it＇s conducive to reduce steel consumption when using flexible brace if deformation plays the controlling role.

关 键 词：钢塔架结构 静力计算 分层空间桁架法 刚性 柔性 

分 类 号：TU347[建筑科学—结构工程] TU391