天津体育中心自行车馆为双层弦支穹顶结构。为了保证该屋盖在使用期间的安全,并对结构的受力性能和温度分布进一步研究,对天津体育中心自行车馆屋盖弦支穹顶结构在使用过程中的温度和应力进行监测。采用热电偶法直接测量杆件表面温度,用振弦计测量了结构关键杆件的应变,获得大量有关天津体育中心自行车馆屋盖结构温度及应力分布状态的数据。通过对这些数据分析表明:正常使用中的钢结构尤其是大跨度空间结构的应力变化主要受温度控制;构件温度与环境温度基本一致,最高温度可取为当地日最高气温;结构最低温度,在能够保证供暖的条件下,高于当地平均最低温度,可以根据实际情况取值。 Tianjin Sports Center Bicycle Museum double stringer dome structure. In order to ensure the safety of the roof during use and to further study the mechanical performance and temperature distribution of the roof, the temperature and stress during the use of roof structure of the roof of Tianjin Gymnasium are monitored. The thermocouple method was used to directly measure the surface temperature of rod and the strain of the key components of the structure was measured by vibrating wire gauge. A great deal of data were obtained on the temperature and stress distribution of the roof structure of the cycling center in Tianjin Sports Center. The analysis of these data shows that the stress changes of the steel structure, especially the long-span space structure, in normal use are mainly controlled by the temperature; the temperature of the component is basically the same as the ambient temperature; the highest temperature can be taken as the local maximum temperature; the lowest temperature of the structure, Guaranteed heating conditions, higher than the local average minimum temperature, according to the actual value.