柔性腹杆塔架结构计算方法分析比较  

Comparison of Calculation Methods on the Flexible Web Member Tower Structures

作　　者：张弓[1] 王谦[2] 赵维娜[2] 夏大桥[2] 

机构地区：[1]西安建筑科技大学土木工程学院,710055 [2]中广电广播电影电视设计研究院,北京100045

出　　处：《特种结构》2017年第2期20-24,共5页Special Structures

摘　　要：在我国存量铁塔中存在不少服役20年以上的柔性腹杆塔架,为了对这种结构形式进行更深入的计算分析,本文分别采用了简化空间桁架法、分层空间桁架法与有限元法三种方法对正四边形柔性腹杆塔架进行了计算分析,对这三种计算方法的计算结果进行比较和分析。发现简化空间桁架法和分层空间桁架在计算柔性腹杆塔架塔柱内力时精度相当;计算柔性腹杆塔架中柔性腹杆内力时,简化空间桁架法计算结构有条件失效。本文得出了简化空间桁架法在计算柔性腹杆时的适用条件。Large numbers of flexible web member towers have been in serve for more than twenty years in our country. In this paper, three most commonly used methods, simplified space truss method, layered space truss method and finite element method, were used to analyze and calculate a square flexible web tower frame. The results indicate that column stress from simplified space truss method and layered space truss are close to that from finite element method. It is noted that simplified space truss method has problem in the calculation of the diagonal bracing stress. Thus, the applicable conditions of the simplified space truss method are put for- ward.

关 键 词：柔性腹杆塔架结构 简化空间桁架法 分层空间桁架法 分析比较 

分 类 号：TU347[建筑科学—结构工程]