|Table of Contents|

Monitoring and simulation analysis of construction process for large-span spatial spoke chord-supported truss structure(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年01期
Page:
95-102
Research Field:
建筑结构
Publishing date:

Info

Title:
Monitoring and simulation analysis of construction process for large-span spatial spoke chord-supported truss structure
Author(s):
LIU Mingliang1; 2;  LI Xiangyu1;  XING Guohua1;  WU Mingyang1;  LI Jiming2
(1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. Shaanxi Architecture Science Research Institute Co., Ltd, Xi'an 710082, Shaanxi, China)
Keywords:
large-span spatial structure;  truss structure;  construction process simulation;  health monitoring
PACS:
TU377.9
DOI:
10.19815/j.jace.2022.05050
Abstract:
The construction process of large-span spatial spoke chord-supported truss structure is complex. The influence of structural stiffness and load changes on structural safety in different construction schemes and stages cannot be ignored. However, at present, the static analysis of large-span space structure after construction is mostly carried out at home and abroad, and the stress monitoring and analysis in the construction process of complex structure are lacking. In order to study the stress and deformation performance of the large-span spatial spoke chord-supported truss structure of a gymnasium in Xi'an in different construction stages, the finite element program MIDAS/Gen was used to simulate the eight different stages of the rotation cumulative slip construction process of the large-span space structure. The stress and displacement of the three key components of the radial inverted triangular truss, the reinforced truss and the “Y” lattice column were simulated and analyzed, and compared with the actual monitoring data. The results show that the numerical simulation result is in good agreement with the actual monitoring data, which verifies the feasibility of numerical simulation. By predicting the structural stress changes and the most unfavorable construction nodes in different construction stages, it can provide ideas and basis for the zoning establishment of the health monitoring system and the layout of key nodes in the construction stage, which has practical engineering significance. The internal force of large-span spatial spoke chord-supported truss structure changes greatly in different construction stages, and the maximum vertical displacement often occurs in the lower chord of the middle part of the truss. In order to ensure the safety of the construction stage, the key nodes such as the vertical web member of the outer ring truss, the web member of the central ring truss and the upper chord should be monitored and warned to avoid the damage of the components in the construction stage and ensure the construction safety.

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Last Update: 2023-01-01