地震作用下大型升船机结构的响应特征分析
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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。
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.
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.
引文
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2俞载道,曹国敖．随机振动理论及其应用．上海:同济大学出版 社,1988
3欧进萍,牛荻涛,杜修力．设计用随机地震动模型及其参数的确 定．地震工程与工程振动,1991,11(3):45-54
4 CLOUGH R W,PENZIEN J著,王光远等译．结构动力学．北京:科学 出版社,1983
5杜修力.水工建筑物抗震可靠度设计和分析用的随机地震输入 模型．地震工程与工程振动,1998,18(4):76-81
6王光远,程耿东等．抗震结构的最优设防烈度与可靠度．北京: 科学出版社,1999
7梁爱虎,陈厚群,候顺载．随机地震动场激励下拱坝多点输入抗 震可靠度分析．地震工程和工程振动,1996,16(1):49-59
8李桂青,李秋胜．工程结构时变可靠度理论及其应用．北京:科 学出版社,2001
2俞载道,曹国敖．随机振动理论及其应用．上海:同济大学出版 社,1988
3欧进萍,牛荻涛,杜修力．设计用随机地震动模型及其参数的确 定．地震工程与工程振动,1991,11(3):45-54
4 CLOUGH R W,PENZIEN J著,王光远等译．结构动力学．北京:科学 出版社,1983
5杜修力.水工建筑物抗震可靠度设计和分析用的随机地震输入 模型．地震工程与工程振动,1998,18(4):76-81
6王光远,程耿东等．抗震结构的最优设防烈度与可靠度．北京: 科学出版社,1999
7梁爱虎,陈厚群,候顺载．随机地震动场激励下拱坝多点输入抗 震可靠度分析．地震工程和工程振动,1996,16(1):49-59
8李桂青,李秋胜．工程结构时变可靠度理论及其应用．北京:科 学出版社,2001
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