基于破坏指标界限值的结构抗震可靠度分析
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摘要
结构抗震可靠性的分析一般即采用动力可靠度的研究方法进行。本文提出了进行结构抗震可靠度分析与计算的一种新方法,即基于破坏指标界限值的结构抗震可靠度分析方法。该方法在标定结构破坏指标范围进行破坏等级划分的基础上,采用JC法对结构在不同烈度地震作用下的各破坏状态概率进行计算,从而完成对结构抗震可靠性的分析。计算实例表明,该方法与经典动力可靠性分析所得结论相一致,这表明了本文方法的正确与可靠。
In general,the seismic reliability of structure is analysed by the method of dynamic reliability.In this paper,a new analytical method of structure seismic reliability is proposed,which is the analytical method of structure seismic reliability based on boundary value of damage index.In the new method,on the base of the division of damage state according to the range of damage index,each damage state probability under the action of earthquakes with different intensities is calculated by the JC method,so that the analysis of structure seismic reliability is completed.It is shown through the example calculation that the analytic results according to the method of this paper is consistent with the results according to dynamic reliability analysis.This indicates that the method proposed in this paper is correct and reliable.
In general,the seismic reliability of structure is analysed by the method of dynamic reliability.In this paper,a new analytical method of structure seismic reliability is proposed,which is the analytical method of structure seismic reliability based on boundary value of damage index.In the new method,on the base of the division of damage state according to the range of damage index,each damage state probability under the action of earthquakes with different intensities is calculated by the JC method,so that the analysis of structure seismic reliability is completed.It is shown through the example calculation that the analytic results according to the method of this paper is consistent with the results according to dynamic reliability analysis.This indicates that the method proposed in this paper is correct and reliable.
引文
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[2]张新培.小震作用下结构可靠指标β的计算方法[J].电子科技大学学报,1994,23(3):274-279.
[3]张新培.抗震结构变形能力可靠度的时程分析法[J].工程力学,1996,13(4):82-88.
[4]刘昌军.考虑参数随机性的钢筋混凝土框架结构抗震可靠度分析[D].西安:西北工业大学,2003.
[5]杨伟军,林立,杨春侠.混凝土多孔砖砌体房屋抗震可靠度分析[J].工程力学,2007,24(10):100-104.
[6]李桂青,李秋胜.工程结构时变可靠度理论及其应用[M].北京:科学出版社,2001.
[7]王社良,马建勋,沈亚鹏.开洞剪力墙结构的抗震可靠性分析[J].西安交通大学学报,1998,32(4):63-66.
[8]杨伟军.服役结构可靠度理论及其应用[M].长沙:中南工业大学出版社,2000.
[9]欧进萍,王光远.结构随机振动[M].北京:高等教育出版社,1998.
[10]Park Y J,Ang A HS.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering,ASCE 1985,111(4):722-739.
[11]江近仁,孙景江.砖结构的地震破坏模型[J].地震工程与工程振动,1987,7(1):20-34.
[12]林立.混凝土多孔砖砌体结构抗震可靠性研究[D].长沙:长沙理工大学,2005.
[13]王光远,程耿东,邵卓民.抗震结构的最优设防烈度与可靠度[M].北京:科学出版社,1999.
[14]瞿伟廉,李桂青.建筑结构基于双重破坏准则的抗震可靠性[J].土木工程学报,1989,22(1):76-83.
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