摘要
基于拉索初始缺陷长度的概念和对预应力产生本质的分析,引入影响矩阵原理,提出拉索空间相关刚度矩阵法,用于研究索系张拉次序和张拉力控制问题及其对结构内力和合理构型的影响.该方法以索力为受调向量、拉索缺陷长度为施调向量,克服了其他方法分析过程繁复、精度欠佳的缺陷.算例表明,所提出方法可有效指导工程设计和施工的索系张拉和预应力控制.
Based on the essence of the structural prestresses, the concept of initial defectiveness length as well as influence matrices, a novel spatial relative stiffness matrix technique was put forward to analyze and optimize the tension order and the initial tension force control of cables in cable-stayed spatial reticulated structure (CSRS). The cables' stresses are regarded as passive controlled vectors and the defectiveness lengths as active controlled vectors in the present technique, which is different from the traditional method. Finally, some numerical computation was given to validate efficiency and effectiveness in the analysis of the optimal tension strategies and cables' initial tension control.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2005年第5期769-773,781,共6页
Journal of Shanghai Jiaotong University
基金
教育部科学技术研究重点项目(104079)
上海市科技发展基金资助项目(02ZF14056)
