钢筋混凝土建筑结构的抗地震破坏倒塌能力评估研究
|
摘要
在地震作用下钢筋混凝土建筑结构出现破坏倒塌为地震灾害中的关键,有效评估建筑结构抗地震破坏倒塌能力是建筑结构设计的前提,也是当前建筑结构提高抗震性能与加固的依据。提出变形指标极值、失效判断标准以及钢筋混凝土建筑结构倒塌极限状态判断标准,据此获取倒塌储备系数、倒塌易损性、结构整体超强系数、结构整体延性系数等评估标准。采用Pushover分析法选择相应地震波。依据梁柱线刚比对建筑结构抗倒塌能力的影响,以及柱端弯矩增加系数对建筑结构抗地震破坏倒塌能力的影响,对建筑结构易损性进行分析。结果表明:等跨建筑结构抗地震破坏倒塌能力更强;建筑结构底层是薄弱层,COF值越高,结构越容易倒塌。
The failure and collapse of reinforced concrete building structures during earthquakes is a key factor in earthquake disasters.The effective evaluation of the seismic collapse-resistant capacity of a building structure is a vital component of building structure design,and also serves as the basis for improving the seismic performance and reinforcement of building structures.In this paper,we propose the extreme value of the deformation index,the failure judgment criterion,and the collapse limit state.Based on these factors,we can obtain evaluation criteria such as the collapse reserve coefficient,collapse vulnerability,structure integral superstrength coefficient,and structure integral ductility coefficient.We use the pushover analysis method to select the corresponding seismic waves.Given the influence of beam-to-column linear stiffness ratio on the anti-collapse capacity of a building structure,we can analyze the vulnerability of the building struc-ture.From our study results,we can draw the following conclusions:equal-span building structures are more resistant to earthquake damage and collapse;the bottom layer of the building structure is weakest;and the higher is the COF value,the more easily a structure will collapse.
The failure and collapse of reinforced concrete building structures during earthquakes is a key factor in earthquake disasters.The effective evaluation of the seismic collapse-resistant capacity of a building structure is a vital component of building structure design,and also serves as the basis for improving the seismic performance and reinforcement of building structures.In this paper,we propose the extreme value of the deformation index,the failure judgment criterion,and the collapse limit state.Based on these factors,we can obtain evaluation criteria such as the collapse reserve coefficient,collapse vulnerability,structure integral superstrength coefficient,and structure integral ductility coefficient.We use the pushover analysis method to select the corresponding seismic waves.Given the influence of beam-to-column linear stiffness ratio on the anti-collapse capacity of a building structure,we can analyze the vulnerability of the building struc-ture.From our study results,we can draw the following conclusions:equal-span building structures are more resistant to earthquake damage and collapse;the bottom layer of the building structure is weakest;and the higher is the COF value,the more easily a structure will collapse.
引文
[1]韩小雷,崔济东,季静,等.强震作用下基于构件性能的钢筋混凝土框架结构抗倒塌能力评估[J].建筑结构学报,2015,36(12):27-34.HAN Xiaolei,CUI Jidong,JI Jing,et al.Component-performancebased Collapse Resistant Capacity Evaluation of Reinforced Concrete Frame Structures under Strong Earthquake Actions[J].Journal of Building Structures,2015,36(12):27-34.
[2]黄超,梁兴文,党争,等.FRC框架结构基于等效单自由度模型的抗地震倒塌能力评估[J].工程力学,2016,33(2):127-135.HUANG Chao,LIANG Xingwen,DANG Zheng,et al.Evaluation of Seismic Collapse Capacity of FRC Frame Structures Based on the Methodology of Equivalent SDOF Systems[J].Engineering Mechanics,2016,33(2):127-135.
[3]张磊,许镇,叶列平,等.基于局部谱形状指标调整结构抗地震倒塌能力的预测结果[J].工程抗震与加固改造,2016,38(5):9-15.ZHANG Lei,XU Zhen,YE Lieping,et al.Adjustment of the Predicted Results of the Collapse Resistance of Structures Based on Spectral Shape Index[J].Earthquake Resistant Engineering and Retrofitting,2016,38(5):9-15.
[4] VROCHIDOU E,ALVANITOPOULOS P F,ANDREADIS I,et al.Structural Damage Estimation in Mid-rise Reinforced Concrete Structure Based on Time-frequency Analysis of Seismic Accelerograms[J].Iet Science Measurement&Technology,2016,10(8):900-909.
[5]刘原,冯远,蒋欢军.建筑结构平面形状对结构抗倒塌能力的影响[J].中国科技论文,2016,11(13):1445-1451.LIU Yuan,FENG Yuan,JIANG Huanjun.Influence of Structural Planar Shape on the Collapse Resistance[J].China Sciencepaper,2016,11(13):1445-1451.
[6]党王桢,梁兴文.RC框架结构地震倒塌易损性分析的实用方法[J].震灾防御技术,2015,10(4):986-995.DANG Wangzhen,LIANG Xingwen.The Practical Method of Collapse Fragility Analysis of RC Frame Structure[J].Technology for Earthquake Disaster Prevention,2015,10(4):986-995.
[7] SAGASTA F,Benavent-Climent A,Fernández-Quirante T,et al.Modified Gutenberg-Richter Coefficient for Damage Evaluation in Reinforced Concrete Structures Subjected to Seismic Simulations on a Shaking Table[J].Journal of Nondestructive Evaluation,2014,33(4):616-631.
[8]周洋,郭迅,孙丽.底层商用多层砌体结构抗震性能与倒塌机理试验研究[J].地震工程与工程振动,2014,34(5):118-128.ZHOU Yang,GUO Xun,SUN Li.Experimental Study on Seismic Performance and Collapse Mechanism of Multi-story Masonry Structure with First Soft Floor[J].Earthquake Engineering and Engineering Vibration,2014,34(5):118-128.
[2]黄超,梁兴文,党争,等.FRC框架结构基于等效单自由度模型的抗地震倒塌能力评估[J].工程力学,2016,33(2):127-135.HUANG Chao,LIANG Xingwen,DANG Zheng,et al.Evaluation of Seismic Collapse Capacity of FRC Frame Structures Based on the Methodology of Equivalent SDOF Systems[J].Engineering Mechanics,2016,33(2):127-135.
[3]张磊,许镇,叶列平,等.基于局部谱形状指标调整结构抗地震倒塌能力的预测结果[J].工程抗震与加固改造,2016,38(5):9-15.ZHANG Lei,XU Zhen,YE Lieping,et al.Adjustment of the Predicted Results of the Collapse Resistance of Structures Based on Spectral Shape Index[J].Earthquake Resistant Engineering and Retrofitting,2016,38(5):9-15.
[4] VROCHIDOU E,ALVANITOPOULOS P F,ANDREADIS I,et al.Structural Damage Estimation in Mid-rise Reinforced Concrete Structure Based on Time-frequency Analysis of Seismic Accelerograms[J].Iet Science Measurement&Technology,2016,10(8):900-909.
[5]刘原,冯远,蒋欢军.建筑结构平面形状对结构抗倒塌能力的影响[J].中国科技论文,2016,11(13):1445-1451.LIU Yuan,FENG Yuan,JIANG Huanjun.Influence of Structural Planar Shape on the Collapse Resistance[J].China Sciencepaper,2016,11(13):1445-1451.
[6]党王桢,梁兴文.RC框架结构地震倒塌易损性分析的实用方法[J].震灾防御技术,2015,10(4):986-995.DANG Wangzhen,LIANG Xingwen.The Practical Method of Collapse Fragility Analysis of RC Frame Structure[J].Technology for Earthquake Disaster Prevention,2015,10(4):986-995.
[7] SAGASTA F,Benavent-Climent A,Fernández-Quirante T,et al.Modified Gutenberg-Richter Coefficient for Damage Evaluation in Reinforced Concrete Structures Subjected to Seismic Simulations on a Shaking Table[J].Journal of Nondestructive Evaluation,2014,33(4):616-631.
[8]周洋,郭迅,孙丽.底层商用多层砌体结构抗震性能与倒塌机理试验研究[J].地震工程与工程振动,2014,34(5):118-128.ZHOU Yang,GUO Xun,SUN Li.Experimental Study on Seismic Performance and Collapse Mechanism of Multi-story Masonry Structure with First Soft Floor[J].Earthquake Engineering and Engineering Vibration,2014,34(5):118-128.