摘要
空间结构施工卸载过程和运营状态受力是十分复杂的。本文在对100余种工况受力分析的基础上,依据应变传感器位置选择原则,首先设计国家游泳中心(简称"水立方")应变监测系统;其次,建立水立方施工卸载过程模拟的有限元模型和运营状态的有限元模型;采用应变监测系统和有限元模型分别监测和模拟水立方施工卸载过程关键杆件的应力变化,以及脚手架的应力变化全过程,分析关键杆件应变变化规律。在此基础上,对水立方运营阶段的温度变化及其产生的应变进行监测,并采用有限元模型进行温度变形计算。结果表明,监测期间,水立方其他荷载较小,温度是主要控制荷载,随温度升高,应变增加,最高温度达到75℃,最大温度应变变化接近500με。
Stress condition of spatial structures is complicated during unloading and daily use. of distribution of strain sensors, a strain monitoring system for the National Aquatics Center more than 100 load conditions. Variations of strains of the key member bar is summarized According to the principle is designed for analysis of based on monitoring and simulation of the strain state of the key member bar and the key scaffold in the process of unloading. Variations of strains under temperature load is monitored and simulated, respectively. It shows that temperature is more important on the building than other factors, and that the member strains increase with the maximum change of strain under temperature load can rise of temperature. The maximum temperature reach to 75℃ and 500με, respectively.
出处
《土木工程学报》
EI
CSCD
北大核心
2012年第3期1-9,共9页
China Civil Engineering Journal
基金
国家863计划(2007AA04Z435)
国家游泳中心钢模结构健康安全监测项目
关键词
水立方
空间结构
健康监测
温度
Water Cube
spatial structure
health monitoring
temperature
