增层改造与加固砌体结构抗震可靠性向量分析
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摘要
根据考虑中介状态的结构可靠性向量理论,认为砌体结构具有"安全-中介-失效"三级工作模式,这里的"中介"状态即为砌体结构带"故障"工作状态。由此,提出了一种加层改造及其加固砌体结构抗震性能的分析方法。根据地震作用引起的结构底部水平地震剪力的概率分布服从极值Ⅱ型的特点,选取以单片墙抗剪强度和楼层平均抗剪强度为计算指标,分别建立了砌体结构的单片墙和楼层的可靠性向量计算方法。采用该方法分析了一增层改造砌体结构,得到不同计算指标条件下原结构、加层改造结构的可靠性向量,同时计算了加固后结构的可靠性向量,为砌体结构的抗震性能评价和加固设计提供决策依据。
According to the theory of reliability vector of structure with intermediate state,it is assumed that masonry structure has three-stage work modes of safety,intermediate and failure.The intermediate state means the state when the structure works with trouble.Based on this,an analysis method for seismic performance of story-adding retrofitted and strengthened masonry structure is put forward.The probabilistic distribution model of seismic loads of masonry structure fits Extreme Value TypeⅡ,and shear strength of wall and mean shear strength of story are chosen to be calculation indexes,based on which calculation methods are put forward respectively to calculate the reliability vector of walls and stories of the masonry structure.This method is used to analyze a story-adding retrofitting masonry structure,and the reliability vector of the unretrofitted and story-adding retrofitted structure is calculated under different calculation indexes.In addition,reliability vectors are developed for the strengthened structure,which can offer decisive data to assessment of seismic performance and strengthening design.
According to the theory of reliability vector of structure with intermediate state,it is assumed that masonry structure has three-stage work modes of safety,intermediate and failure.The intermediate state means the state when the structure works with trouble.Based on this,an analysis method for seismic performance of story-adding retrofitted and strengthened masonry structure is put forward.The probabilistic distribution model of seismic loads of masonry structure fits Extreme Value TypeⅡ,and shear strength of wall and mean shear strength of story are chosen to be calculation indexes,based on which calculation methods are put forward respectively to calculate the reliability vector of walls and stories of the masonry structure.This method is used to analyze a story-adding retrofitting masonry structure,and the reliability vector of the unretrofitted and story-adding retrofitted structure is calculated under different calculation indexes.In addition,reliability vectors are developed for the strengthened structure,which can offer decisive data to assessment of seismic performance and strengthening design.
引文
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[2]Hueste M D,Bai J-W.Seismic retrofit of a reinforcedconc-rete flat-slab structure:partⅠ-Seismicperformance eval-uation[J].Engineering Structures.2007,29(6):1165～1177
[3]Hueste M D,Bai J-W.Seismic retrofit of a reinforcedconc-rete flat-slab structure:partⅡ-Seismic fragilityanalysis[J].Engineering Structures.2007,29(6):1178～1188
[4]Yasuhiro,Ellingwood.Maintaining reliability ofconcrete structure.Ⅰ:Role of inspection/repair[J].Journal of Structural Engineering,ASCE,1994,120(3):824～845
[5]Yasuhiro,Ellingwood.Maintaining reliability ofconcrete structure.Ⅱ:Option inspection/repair[J].Journal of Structural Engineering,ASCE,1994,120(3):846～862
[6]王光远.结构服役期间的动态可靠度及其维修理论初探[J].哈尔滨建筑工程学院学报,1990,23(2):1～9Wang Guang-yuan.The exploration of theory of decisionfor the maintenance and repair of structure[J].J.Harbin Archit&Civ.Eng.Inst.,1990,23(2):1～9(in Chinese)
[7]Wang Guang-yuan,WANG Wen-quan.Fuzzy reliabilityan-alysis of aseismic sructures[A].Proceeding ofInterna-tional Symposium on Fuzzy Mathematics inEarthquake Researchs[C],Beijing:ChinaSeismological Press,1985
[8]Wang Guang-yuan,Wang Wen-quan,Ou Jinping.Generalized reliability of engineering structures[A].Proceeding of Second International Fuzzy SystemsAssociation Congress[C],Beijing:China SeismologicalPress,1985
[9]王光远,张鹏,陈艳艳,于玲.工程结构及系统的模糊可靠性分析[M].南京:东南大学出版社,2001Wang Guang-yuan,Zhang Peng,Chen Yan-yan,YuLing.Fuzzy Reliability Analysis of EngineeringStructures and Systems[M].Nanjing:SoutheastUniversity Press,2001(in Chinese)
[10]Zhang Peng,Wang Guang-yuan,Lv Da-gang.Reliability Analysis of Engineering Structures andSystems with Intermediate State before Failure[A].The Proceeding of International Conference onEngineering and Tech-nological Sciences 2000[C],Beijing:Architecture Industry Press of China,2000
[11]Zhang Peng,Lv Da-gang,Wang Guang-yuan.ReliabilityAnalysis of Voting Engineering Systems with Intermedia-te State before Failure[J].International Journal ofAdvances in System Science and Application,2000,1(2):97～103
[12]王光远,张鹏.具有中介状态的工程系统的可靠性分析[J].土木工程学报,2001,34(3):13～17Wang Guang-yuan,Zhang Peng.Reliability analysis forengineering systems with intermediate state[J].ChinaCivil Engineering Journal,2001,34(3):13～17(inChinese)
[13]施楚贤.砌体结构[M].北京:中国建筑工业出版社,2005Shi Chu-xian.Masonry Structure[M].Beijing:ChinaArchitecture&Building Press,2005(in Chinese)
[14]高小旺,鲍霭斌.地震作用的概率模型及其统计参数[J].地震工程与工程振动,1985,5(1):13～22Gao Xiao-wang,Bao Ai-bin.Probabilistic model and itsstatistical parameters for seismic load[J].EarthquakeEngineering and Engineering Vibration,1985,5(1):13～22(in Chinese)
[15]JGJ 116-2009,建筑抗震加固技术规程[S]JGJ 116-2009,Technical Specification for SeismicStrengthening of Buildings[S](in Chinese)
[16]吕西林.建筑结构加固设计[M].北京.科学出版社,2001Lv Xi-lin.Strengthening Design of Building Structures[M].Beijing:Science Press,2001(in Chinese)
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