预应力网壳-拉杆拱组合结构预应力全过程分析与监测

Prestressing Analysis and Inspection on Composite Structure of Prestressed Reticulated Shell and Tied-Arch

以长江防洪模型试验大厅为工程背景,介绍了一种新型大跨空间结构体系:预应力网壳-拉杆拱组合结构。结合该工程的结构特点,采用提出的"迭代求解法"确定了索的初始形变,并利用"顺序分析法"进行预应力施工全过程模拟得到各水平拉索和竖向吊杆的张拉控制力,最后将预应力施工的现场监测结果与理论分析结果进行对比,验证了理论分析的准确性。

Based on the experiment hall engineering of preventing flood model for Changjiang river, a new-type large-span space structure is introduced, i. e. , composite structure of prestressed reticulated shell and tied-arch. Incorporating the characters of this engineering, the ＂iterative method＂ is presented to determine the initial deformations of cables, and the prestressing process of experiment hall engineering is simulated using ＂sequential analytical method＂ to obtain the results of cable forces in every prestressing phase. The field inspection and theoretical results of prestressing process are compared to verify the theoretical analysis.