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提出了一种新型悬挂结构体系——半刚性悬挂结构体系。该结构体系在悬挂楼段与转换层之间设置半刚性层,其间设置减振阻尼装置。通过时域内输入El Centro波、Taft波以及人工波,验证了该体系具有良好的动力响应特性。根据随机振动理论,在复数域内推导了体系的随机振动响应表达式;以主体核筒结构顶点位移和半刚性层的层间位移为目标函数,编制了MATLAB计算程序,对体系中影响结构动力响应的阻尼器的刚度和阻尼、悬挂质量比及半刚性连接的转动刚度等进行参数分析。计算结果表明:该体系能够有效减小地震动力响应,半刚性层的层间位移较大,主体结构顶点位移和悬挂楼层的层间位移较小;对于文中给出的结构算例存在最优参数组合:阻尼器刚度和阻尼分别为1×107N/m和1×107N.s/m,悬挂质量比取3.0,半刚性连接转动刚度为3.14×104N.m/rad;当半刚性悬挂结构的参数取得最优组合时,主体结构动力响应和半刚性层层间位移均可得到较好的控制,结构的减振避震性能明显提高。
Proposed a new type of suspension structure - semi-rigid suspension structure system. The structural system is provided with a semi-rigid layer between the suspended section and the conversion layer, with a damping damping device disposed therebetween. Through the input of El Centro wave, Taft wave and artificial wave in the time domain, the system has good dynamic response characteristics. Based on the random vibration theory, the random vibration response of the system is deduced in the complex domain. The objective function is the displacement of the apex of the core structure and the interlayer displacement of the semi-rigid layer. The MATLAB program is compiled and the influence of the dynamic response of the system The stiffness and damping of the damper, the mass ratio of the suspension and the rotation stiffness of the semi-rigid connection are analyzed. The results show that the system can effectively reduce the seismic dynamic response, the interlayer displacement of the semi-rigid layer is larger, the displacement of the apex of the main structure and the interlayer displacement of the suspended floor are smaller. For the structure example given in this paper, the optimal parameter The stiffness and damping of the damper are respectively 1 × 107N / m and 1 × 107N.s / m, the suspension mass ratio is taken as 3.0, and the rotational rigidity of the semi-rigid connection is 3.14 × 104N.m / rad. When the parameters of the semi-rigid suspension structure When the optimal combination is obtained, the dynamic response of the main structure and the displacement of the semi-rigid layer can be well controlled, and the vibration and shock absorption performance of the structure is obviously improved.