预应力大悬挑钢结构索-钢转换节点足尺模型试验与设计研究  

Full-scale model experiment and research of large span prestressed cable-member transfer connection

作　　者：张国军[1] 葛家琪[1] 谷鹏[2] 陈丹[2] 田春雨[3] 陈涛[3] 

机构地区：[1]中国航空规划建设发展有限公司,北京100120 [2]北京交通大学,北京100044 [3]中国建筑科学研究院,北京100013

出　　处：《建筑结构》2010年第12期34-40,83,共8页Building Structure

基　　金：贵州省科技厅工业攻关项目([2010]3002);贵阳市科技局工业攻关项目[2010]

摘　　要：对预应力索-钢转换节点进行力学性能分析、足尺模型试验研究和ANSYS模拟分析。通过对三种方法预应力损失及摩擦性能的对比分析,总结了预应力损失、摩擦系数的变化规律。结果表明,预应力损失随着荷载的增加而缓慢增加并最终趋于恒定值;摩擦系数在加载初期急剧增加,随着荷载加大摩擦系数呈递减趋势,最终趋于恒定值。试验、有限元和力学分析结果表明,三种方法预应力损失计算结果吻合良好。预应力损失的试验测试和施工措施以及预应力索的锚固试验,可供此类预应力钢结构工程参考。Mechanical capability of prestressed cable-member transfer connection,full-scale model experiment and nonlinear contact friction finite element stimulation were analyzed.By contrasting prestressed loss and frictional capability of three methods,the mutative rules of prestressed loss and frictional coefficient were summarized.The research shows that prestressed loss slowly increases with the increase of load until one steady count at last.Frictional coefficient increases quickly in the initial stage,decreases with the increasing of load until one steady count at last.Results of prestressed loss of three methods are coincident.It provides reference to prestressing steel structure engineerings about prestressed loss survey and decrease measure.

关 键 词：索-钢转换节点 预应力损失 摩擦 超张拉 

分 类 号：TU333[建筑科学—结构工程]