大直径筒仓仓顶施工支撑体系优化分析  

OPTIMIZATION ANALYSIS ON SUPPORT SYSTEM FOR ROOF CONSTRUCTION OF A LARGE-DIAMETER SILO

作　　者：肖树豪 赵海龙[1,2] 李勤山 李国耀 XIAO Shuhao;ZHAO Hailong;LI Qinshan;LI Guoyao(School of Civil Engineering, Tianjin University, Tianjin 300072, China;Key Laboratory of Coast Civil Structure Safety（ Tianjin University） , Ministry of Education, Tianjin 300072,China;Pingmei Shenma Construction Engineering Group Ltd, Pingdingshan 467000, China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072 [3]平煤神马建工集团有限公司,河南平顶山467000

出　　处：《工业建筑》2018年第5期139-143,共5页Industrial Construction

基　　金：天津市应用基础与前沿技术研究计划项目(15JCQNJC43900)

摘　　要：某直径25 m筒仓仓顶为锥壳式结构,采用悬吊钢管桁架作为仓顶施工的支撑体系。为明确此支撑体系在荷载作用下的内力及挠度变化规律,提高其设计承载能力,基于ANSYS有限元分析软件,依次对桁架杆件尺寸不同的支撑体系和钢绞线悬吊位置不同的支撑体系进行优化分析。结果表明：桁架杆件压应力对支撑体系承载力起控制作用;桁架杆件尺寸对钢绞线和桁架杆件拉应力影响显著并呈正相关,对体系承载力影响不大;当桁架杆件尺寸为1.0 m×1.0 m,在距桁架中心5,8,12 m下弦节点处依次均匀拉第1圈,第2圈和第3圈钢绞线时,支撑体系承载力最大。The suspended steel pipe truss was used as the support system for construction of a 25-meter-diameter silo＇s roof with the cone-shell structure. In order to find out the law for internal forces and displacements,and improve the design bearing capacity of the support system under load,the ANSYS finite element analysis software was used to analyze different support systems in size of truss bars and different support systems in location of steel strands in turn. It was shown from the results that the compressive stress of truss bars played a key role in the bearing capacity of the support system; the effects of size of truss bars on the tensile stress of steel strands and the tensile stress of truss bars was great and positive,while has little effect on the bearing capacity of the support system; The bearing capacity of support system is the biggest when the size of truss bars was 1. 0 m × 1. 0 m and the three laps stranded wires were hanged at the distance of 5 meters,8 meters and 12 meters from the center of the truss.

关 键 词：筒仓仓顶 支撑体系优化 有限元分析 承载力 

分 类 号：TU731.2[建筑科学—建筑技术科学]