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大跨、轻柔结构的设计中,结构舒适度控制已经成为其中重要设计控制准则之一。设计初期的理论分析值与现场实测值往往会产生较大的出入,因此需要对结构有限元模型进行精细化研究。影响结构舒适度分析模型的主要因素包括结构质量的选取、楼板面层刚度、主次钢梁的连接,结构优化选择及阻尼比的设定,由此提出更为精确的结构舒适度分析模型。并以该模型为依据进行TMD减振控制。以武汉大学万林博物馆不规则悬挑楼盖工程为背景,进行理论分析并与实测值对比验证。结果表明:极限承载力模型对于振动舒适度评价不再适用。采用文中考虑的相关因素进行精细化分析可以比较精确模拟结构在实际使用中的动力特性与动力响应,TMD减振控制后结构满足舒适要求,本文的研究方法可为进行舒适度分析的结构建模提供参考。
In the design of long-span and soft structures, structural comfort control has become one of the important design control criteria. In the initial stage of design, the theoretical analysis values and field measured values tend to produce large differences. Therefore, the structural finite element model needs to be refined. The main factors influencing the structural comfort analysis model include the selection of structural quality, the stiffness of the floor surface, the connection of the primary and secondary steel girders, the optimization of the structure selection and the setting of the damping ratio, thus providing a more accurate structural comfort analysis model. Based on this model, TMD damping control is performed. Taking the irregular cantilever floor project of Wanlin Museum of Wuhan University as the background, the theoretical analysis was conducted and compared with the measured values. The results show that the ultimate bearing capacity model is no longer suitable for vibration comfort evaluation. Using the relevant factors considered in the paper for detailed analysis can accurately simulate the dynamic characteristics and dynamic response of the structure in actual use. After the TMD damping control, the structure meets the comfort requirements. The research method in this paper can be used to model the comfort analysis. for reference.