福州海峡奥体中心体育场卸载过程分析及监测  

Analysis and monitoring of unloading process for Fuzhou Strait Olympic Sports Center

作　　者：刘奔 尤德清[2] 喻馨 钟广建 吴聪 

机构地区：[1]中建钢构有限公司,深圳518040 [2]北京市建筑工程研究院有限责任公司,北京100039

出　　处：《建筑结构》2015年第5期49-53,共5页Building Structure

摘　　要：大跨度钢网壳屋盖结构在卸载过程中的受力状态与成型后的受力状态相比有很大变化。以福州海峡奥体中心体育场为例,建立体育场卸载过程模拟的有限元模型,分析了结构在卸载过程中的位移和应力变化趋势,并在监测过程中考虑温度对结构卸载过程的影响。结果表明,钢罩篷临时支撑卸载后,其主要杆件内力相对于卸载前的应力变化较大,但所有杆件的应力随卸载过程的进行变化都比较平缓,监测的应力-应变曲线在结构设计范围之内;悬挑端监测点均较卸载前产生向下的竖向位移,结构变形值和计算值吻合,说明采用有限元模拟结构卸载过程可行,所采取的结构卸载过程监测方法能够有效地反映结构的内力和位移变化。The stress states are different in the construction process and after the molding of the large-span steel reticulated shell roof structure. Taking the Fuzhou Strait Olympic Sports Center as an example,the finite element model simulating the construction unloading process was established,and the changing trends of displacement and stress in the unloading process were analyzed. The effect of the temperature on the structure in unloading process was also considered. The results show that after unloading the temporary supports of steel awning,the internal forces of main rods changes greatly relative to stress before unloading,stress changes for all monitoring points of temporary supports are relatively flat in the unloading process,and monitored stress-strain curve is within the scope of the structure design. Downward vertical displacement appears in cantilevered end after unloading and structure deformation value agrees with calculation value, which suggests that unloading process simulated by finite element method is feasible and adopted monitoring method in the unloading process can effectively reflect the change of internal force and displacement of the structure.

关 键 词：卸载 仿真分析 施工监测 钢网壳 

分 类 号：TU391[建筑科学—结构工程]