索杆预张力结构杆件长度误差敏感性的理论分析与试验研究

发布时间：2018-03-30 14:10

本文选题：索杆张力结构　切入点：长度误差　出处：《建筑结构学报》2015年06期

【摘要】：针对索杆预张力结构施工中存在的杆件长度误差,基于随机理论建立符合正态分布的随机误差模型,推导了结构预张力偏差与索长偏差的基本关系,并根据数理统计方法得到随机预张力偏差的统计特性,得到各杆件长度误差敏感性评价方法。通过设计跨度为5 m的空腹索桁架结构模型,并在其上调整索杆长度来模拟施工过程中产生的长度误差。分析了引入误差后体系预张力变化及结合ANSYS软件数值分析来考察验证各杆件的误差敏感性。结果表明:预张力结构不同杆件具有不同长度误差敏感性。空腹索桁架结构中环索误差敏感性最明显,脊索、斜索次之,桅杆最弱;试验结果与理论分析基本一致,表明理论分析和模型设计加工的有效性和正确性。
[Abstract]:In view of the length error of member in the construction of cable-rod pre-tension structure, the random error model according to the normal distribution is established based on the random theory, and the basic relationship between the pre-tension deviation and the cable length deviation of the structure is deduced. According to the statistical characteristics of random pretension deviation, the sensitivity evaluation method of the length error of each member is obtained. The model of an empty web cable truss structure with span of 5 m is designed. The length of cable rod is adjusted to simulate the length error in construction process. The change of system pre-tension after introducing error is analyzed and the sensitivity of error of each member is investigated and verified with the numerical analysis of ANSYS software. The sensitivity of different members of pretension structure is different in length error. The sensitivity of ring cable error is the most obvious in fasting cable truss structure. The experimental results are basically consistent with the theoretical analysis, which shows the validity and correctness of the theoretical analysis and model design and processing.
【作者单位】：温州大学建筑工程学院;浙江大学空间结构研究中心;三箭建设工程集团有限公司;常州工学院土木与建筑学院;
【基金】：浙江省自然科学基金项目(LY14E080019) 浙江省科技计划项目(2014C33013)
【分类号】：TU399

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