【摘要】 由于对自动化开合的要求,移动式开合屋盖通常需要引入机械系统、运行控制系统,使得整个结构成为一个较为复杂的耦合系统。以贵阳西南国际商贸城一期工程天窗开合屋盖为研究对象,建立该开合屋盖结构1∶10缩尺的物理模型,通过开展不同条件下的物理模型试验来研究该屋盖结构在运行状态下的变形及振动特性。试验结果表明:随着外部荷载的不断增加,结构变形也在不断地增大;但是屋盖结构的变形量值较小,基本处于线弹性范围之内,试验变形与弹性理论计算结果较为吻合。同时屋盖结构的振动加速度随着荷载的增大而增大,并且在屋盖启动、刹车或转向时,结构振动加速度有明显的突变效应。更多还原

【Abstract】 Because of the demand on automatic opening and closing,mechanical system and operation control system should be introduced into movable and retractable roof,to make the whole structure be a complicate coupling system.The first-stage project of Guiyang Southeast International Shopping Mall was taken as the experimental study object,a size ratio of 1 ∶ 10 physical model was designed for this retractable roof structure,whose deformation and vibration features during operation process were studied based on several modeling tests under different external loading conditions. Experimental results showed that the structural deformation was increased with the increase in external loads. However,the structural deformation was relatively small and basically in the scope of elastic deformation,which matched with the simulated results by using of elastic theory. The structural vibration was also increased with the increase in external loads,and the structural vibration had a distinctive mutation effect when the roof was starting,brakeing or swerving.更多还原