钢筋混凝土框架结构强柱弱梁设计的概率分析
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摘要
考虑结构材料强度、几何尺寸以及计算模式的随机性,同时考虑梁纵筋的超强影响,采用可靠度理论分析了钢筋混凝土结构单个节点强柱弱梁设计的可靠度,得出了不同设防等级下强柱弱梁设计的可靠指标以及对应的失效概率.在此基础上,以6层框架为例,分析了不同柱端弯矩增大系数下结构的整体失效概率,采用投资-效益准则,提出了一种合理的确定柱端弯矩增大系数的方法.
The concrete strength, steel strength, member dimensions and flexure model were considered as random variables, the reliability of "strong column-weak beam design" for one joint of reinforced concrete frame was analyzed under a series of column-to-beam strength ratio, and the failure probability of reinforced concrete frames was also analyzed. Based on those results, the column-to-beam strength ratio was determined. Using the "cost-benefit" criteria, a method for determining column-to-beam strength ration was presented.
The concrete strength, steel strength, member dimensions and flexure model were considered as random variables, the reliability of "strong column-weak beam design" for one joint of reinforced concrete frame was analyzed under a series of column-to-beam strength ratio, and the failure probability of reinforced concrete frames was also analyzed. Based on those results, the column-to-beam strength ratio was determined. Using the "cost-benefit" criteria, a method for determining column-to-beam strength ration was presented.
引文
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[4] WenYK.Reliabilityandperformance-baseddesign[J]StructuralSafety,2001,23:407-428.
[5] BerteroRD,BerteroVV.Performance-basedseismicengineering:theneedforareliableconceptualcomprehensiveapproach[J].EarthquakeEngineeringandStructuralDynamics,2002,31:627-652.
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[7] 赵国藩.工程结构可靠性理论与应用[M].大连:大连理工大学出版社,1996.34-46.
[8] 马宏旺,吕西林.钢筋混凝土框架结构造价与失效概率之间的近似关系研究[J].地震工程与工程震动,2003,23(3):125-131.MAHong-wang,LUXi-lin.Studyonrelationshipbetweenstructuralcostandfailureprobabilityofreinforcedconcreteframes[J].EarthquakeEngineeringandEngineeringVibration,2003,23(3):125-131.
[9] 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,1999.211-227.
[2] 龚思礼.建筑抗震设计[M].北京:中国建筑工业出版社,1994.
[3] GB50011-2001,建筑抗震设计规范[S].
[4] WenYK.Reliabilityandperformance-baseddesign[J]StructuralSafety,2001,23:407-428.
[5] BerteroRD,BerteroVV.Performance-basedseismicengineering:theneedforareliableconceptualcomprehensiveapproach[J].EarthquakeEngineeringandStructuralDynamics,2002,31:627-652.
[6] 沈在康.混凝土结构设计新规范应用讲评[M].北京:中国建筑工业出版社,1993.26-32.
[7] 赵国藩.工程结构可靠性理论与应用[M].大连:大连理工大学出版社,1996.34-46.
[8] 马宏旺,吕西林.钢筋混凝土框架结构造价与失效概率之间的近似关系研究[J].地震工程与工程震动,2003,23(3):125-131.MAHong-wang,LUXi-lin.Studyonrelationshipbetweenstructuralcostandfailureprobabilityofreinforcedconcreteframes[J].EarthquakeEngineeringandEngineeringVibration,2003,23(3):125-131.
[9] 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,1999.211-227.
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