无支架缆索吊装系统单跨双吊点主缆计算  

Calculation of Main Cable with Double-lifts in Single Span with Non-support Cable Crane System

作　　者：刘睿[1] 雷雨亮 周水兴[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]北京海龙公路工程公司,北京102206

出　　处：《重庆交通大学学报（自然科学版）》2010年第6期841-845,共5页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：利用缆索静力平衡原理,建立了主缆按双吊点位置的分段曲线方程,推导了相应的主缆垂度和水平张力计算公式,分析了主缆双吊点距离、主缆跨径、主缆自重及吊重等参数对水平张力的影响。结果表明:影响主缆水平张力的主要因素是两吊点间距与主缆跨径之比,当两者之比在0.05以内时,用单吊点法和双吊点法计算结果差异很小,可忽略不计。Based on the principle of static equilibrium of cable,segmental curve equations of main cable with double-lifts in single span were established;formulae of the sag and horizontal tension were obtained;the influence of distance of double-lifts,span,self-weight,load and the like on horizontal tension was analyzed.Results indicated that the ratio of distance of double-lifts and span of main cable played an important role in affecting horizontal tension of the cable;the tolerance by the method of double-lifts and single-lift was quite small,which can be ignored.

关 键 词：无支架缆索吊装系统 主缆水平张力 双吊点 分段曲线方程 主缆垂度 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]