【摘要】 从振动力学的角度,以某大型升船机建筑结构为背景,对升船机结构的动力特性及在地震作用下升船机结构的确定性和随机反应特征进行了较系统的分析。首先建立了升船机建筑结构的三维分析模型,对升船机结构进行了动力特性及时程响应特征分析。然后,在总结与分析有关地震动随机模型研究成果的基础上,通过比较,选择了具有较全面描述输入地震动随机特性的数学模型,并对升船机结构的功率谱响应特征进行了分析。最后,基于上述结构反应特征分析,给出了升船机建筑结构抗震可靠度计算模型的适用性建议。更多还原

【Abstract】 The dynamic characteristic and seismic response characteristic of a large ship-lifter tower structure were investigated under the engineering background of an actual ship-lifter tower structure. The response characteristic analysis involved the definite seismic response and random seismic response. First, the dynamic characteristic and time-history response of the ship-lifter structure under seismic loading were analyzed by 3-D finite element model. Next, the existing stochastic models characterizing seismic ground motion were reviewed, the advisable one for ship-lifter structure analysis was selected, and the response power spectral characteristic under this stochastic ground motion model were analyzed. Finally, based on these results, the advisable mathematical model for seismic reliability analysis of large ship-lifter tower structures was suggested.更多还原