施工技术 2010年2月 14 CONSTRUCTION TECHNOLOGY 第39卷第2期 白云机场预应力钢结构张拉索力损失分析 戴立先，陈韬，孟祥冲，谭神洲，王春旭 (中建钢构有限公司，广东深圳518040) [摘要]广州白云国际机场二期工程屋盖结构横向连接桁架下弦杆采用预应力拉索结构，为保证张拉过程中索力 达到设计值，分别进行了预应力拉索在张拉过程中无黏结钢绞线与外包护套及外包护套与钢管内壁摩擦、锚具回 缩索力损失分析，充分掌握结构的性能和施工过程变化规律. 【关键词]预应力空间钢结构；张拉索力损失；摩擦分析 [中图分类号]TU745.2 [文献标识码]A [文章编号]1002-8498(2010)02-0014-04 Analysis of Cable Tension Loss in Prestressed Steel Structure of Baiyun Airport Dai Lixian Chen Tao Meng Xiangchong Tan Shenzhou Wang Chunxu China Construction Steel Structure Corporation Shenzhen Guangdong 518040 China) Abstract:Theory analysis and experiment of tension technology for the prestressed cable structure are used in phaseⅡproject of Baiyun Airport in Guangzhou as the bottom chord bar of transverse connection roof truss.To ensure that the cable tension foree reaches the design value during the stretching process the analysis of friction between non-cohesive steel strand and external sheath the external sheath and internal wall of steel pipe are introduced.Also it contains the analysis of the cable tension loss caused by anchorage retraction.Therefore the variation of structural performance and construction process can be obtained. Key words:prestressed spatial steel structure;cable tension loss;friction analysis 预应力空间钢结构的张拉索力损失技术研究是空布置2束无黏结预应力钢绞线拉索，每束12道拉索. 间张拉结构施工的关键技术和难点.空间张拉结构具拉索采用低松弛镀锌钢绞线，光面钢绞线直径 有柔性索，施加预应力过程中其结构形状与位置、结构15.2mm 钢绞线外包高密度聚乙烯护套，护套厚度1.5 的预应力分布不断变化，使得施工的难度增大.主要~2.0mm 强度f=1770MPa 两端采用拉索专用防 解决两方面的问题：①合理高效的施工技术设计，为张腐铺具，拉索错具如图1所示. 力结构的施工进行技...
白云机场预应力钢结构张拉索力损失分析.pdf
