地震对框架结构累积损伤影响分析
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摘要
将框架结构等效为剪切型模型,采用三线型刚度退化模型,考虑累积损伤效应对结构刚度产生的影响进行时程分析,并利用改进的Park-Ang损伤模型计算得到结构的损伤情况。表明;结构的第一层损伤最为严重;地震序列不同,引起结构的损伤值也不相同;考虑损伤累积效应对结构的弹塑性地震反应有着显著的影响,建议在结构设计的第二个阶段,考虑材料的累积损伤和地震能量吸收与耗散,这样更能够体现结构的最不利反应状态,有利于制定合理的结构抗震措施。
A quantitative inelastic dynamic analysis of damage to shearing modelis studied with the consideration of seismic accumulative effect.Three variants of Takeda's model with a trilinear envelope and the improved damage model are adopted.The results indicate that first floor of the structure suffers greatest damage;the longer the duration of the earthquake,the more obvious the damage caused by energy accumulation;the damage value of structures varies by different seismic sequence;Damage accumulative effect has great influence on the dynamic behavior of structures suffering earthquakes,i.e.the overall damage of a structure will be greater when accumulative effect is taken into account.Given the results above,damage accumulative performance of building materials and energy absorption and dissipation should be considered during the second phase of structure design.Thus,the most adverse reaction of the structure can be detected and make it reasonable to resist earthquakes.
A quantitative inelastic dynamic analysis of damage to shearing modelis studied with the consideration of seismic accumulative effect.Three variants of Takeda's model with a trilinear envelope and the improved damage model are adopted.The results indicate that first floor of the structure suffers greatest damage;the longer the duration of the earthquake,the more obvious the damage caused by energy accumulation;the damage value of structures varies by different seismic sequence;Damage accumulative effect has great influence on the dynamic behavior of structures suffering earthquakes,i.e.the overall damage of a structure will be greater when accumulative effect is taken into account.Given the results above,damage accumulative performance of building materials and energy absorption and dissipation should be considered during the second phase of structure design.Thus,the most adverse reaction of the structure can be detected and make it reasonable to resist earthquakes.
引文
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杜修力,欧进萍.建筑结构地震破坏评估模型[J].世界地震工程,1991,(3):52-58.
顾祥林,许勇,张伟平,等.钢筋混凝土梁开裂后刚度退化研究[J].结构工程师,2005,(5):22-25.
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,(1);20-34.
蒋丽忠,曹华,余志武,等.钢—混凝土组合框架地震弹塑性时程分析[J].铁道科学与工程学报,2005,(3):1-8.
李洪泉,贲庆国,于之绰,等.钢框架结构在地震作用下累积损伤分析及试验研究[J].建筑结构学报,2004,(3):69-74.
连业达,王宪杰,张淘安,等.LimazieToi.结构地震累积损伤指标研究进展[J].工业建筑,2012,(4):118-122.
牛荻涛,任利杰.改进的钢筋混凝土结构双参数地震破坏模型[J].地震工程与工程振动,1996,(4):44-54.
欧进萍,牛荻涛,王光远,等.多层非线性抗震钢结构的模糊动力可靠性分析与设计[J].地震工程与工程振动,1990,(4):27-37.
吴波.主余震作用下钢筋混凝土结构的损伤试验与分析[D].哈尔滨建筑工程学院博士学位论文,1993.
赵西安.钢筋混凝土高层建筑结构设计[M].北京:中国建筑工业出版社,1993:243-244.
Park Y J,Ang A H S.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering,ASCE,1985,111(4),722-739.
Takeda T,Sozen M A,Nielson N N.Reinforced concrete response to simulated earthquakes[J].Journal of Structural Division,1970,96(STI2).2 557-2 572.
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