塔式起重机风致动力响应分析及安全控制

Analysis of Wind-induced Vibration and Safety Control of a Tower Crane

提高塔式起重机的本质安全以及合理地使用和管理好塔式起重机,是建筑业亟待解决的难题之一。针对常用的塔式起重机塔架结构建立力学模型,运用线性滤波法模拟三维风速时程,基于Newmark-β方法数值计算分析高度、塔架结构形式、风向角等关键参数对塔式起重机结构风致效应的影响;为最大限度的降低塔式起重机风致作用下发生安全事故的几率,提出相应的预防措施,并验证预防措施的可行性与可靠性,以期为塔式起重机设计、安装和使用提供了理论指导。

The improvement of intrinsic safety and management of the tower cranes is one of the key problems to be solved in the construction industry .For a typical tower crane ,the parametric mechanical model was established ,through which the time histories of 3D wind velocity series was simulated by auto - regression method .And then the influence of differ-ent key parameters ,such as height ,structure form and wind direction on the wind-induced vibration responses of the tow-er crane structure were calculated and analyzed by Newmark-β approach .To reduce the occurrence of wind-induced acci-dents maximally ,the preventing measures were proposed and validated for their feasibility and reliability ,so as to provide theoretical guidance for the design ,installation and operation of crane towers .