多层钢筋混凝土框架柱震害调查分析与启示
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摘要
针对汶川地震中多层钢筋混凝土框架结构的框架柱震害进行分析,就我国现行规范为实现预期抗震设防目标,对框架柱梁抗弯能力比值以及柱轴压比、箍筋配箍率、纵向钢筋总配筋率等抗震构造措施展开讨论,并与美国IBC2006规范、AC I318-08规范以及欧盟EC8规范的相关规定进行比较,提出关于保证结构实现抗震设防目标的框架柱、梁抗弯能力比值以及最小配箍率、轴压比、纵向钢筋最小总配筋率等抗震措施的建议。
Seismic damages of frame columns in multi-story reinforced concrete buildings caused by the Wenchuan earthquake are analyzed.With regard to the expected seismic design objective specified in the current design code,the discussion mainly focuses on the flexural strength ratio of column to beam,the axial compression ratio of column,and the reinforcement ratios of the stirrups and longitudinal steel bars.These factors are compared with the corresponding clauses in IBC2006,ACI318-08 and EC8.Design suggestions on earthquake resistant measures,which include the adequate flexural strength ratio of column to beam,the minimum stirrup reinforcement ratio,the overall longitudinal reinforcement ratio and the axial compression ratio,are put forward to achieve the expected seismic design objective.
Seismic damages of frame columns in multi-story reinforced concrete buildings caused by the Wenchuan earthquake are analyzed.With regard to the expected seismic design objective specified in the current design code,the discussion mainly focuses on the flexural strength ratio of column to beam,the axial compression ratio of column,and the reinforcement ratios of the stirrups and longitudinal steel bars.These factors are compared with the corresponding clauses in IBC2006,ACI318-08 and EC8.Design suggestions on earthquake resistant measures,which include the adequate flexural strength ratio of column to beam,the minimum stirrup reinforcement ratio,the overall longitudinal reinforcement ratio and the axial compression ratio,are put forward to achieve the expected seismic design objective.
引文
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[3]GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001(GB 50011—2001 Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2001(in Chinese))
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[7]Eurocode 8:Design of structures for earthquake resistance-Part1:general rules,seismic actions,design rules forbuilding,foundations and retaining structures[S].London:Thomas Telford,2005
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[9]2006 International building code[S].United States:Inter-national Code Council,Inc.,2006
[10]ACI 318-08 building code requirements for structural concreteand commentary[S]
[11]韦锋.钢筋混凝土框架和框架-剪力墙结构非弹性地震反应性态的识别[D].重庆:重庆大学,2005(Wei Feng.Verifications of inelastic seismic response performance ofreinforced concrete frame and frame-wall structures[D].Chongqing:Chongqing University,2005(in Chinese))
[12]BS EN 1998-1:2004 Eurocode 8:Design of structures forearthquake resistance-Part1:general rules,seismic actionsand rules for buildings[S]
[2]林旭川,潘鹏,叶列平,等.汶川地震中典型RC框架结构的震害仿真与分析[J].土木工程学报,2009,42(5):13-20(Lin Xuchuan,Pan Peng,Ye Lieping,et al.Analysis on damage mechanism of a typical RC frame inWenchuan earthquake[J].China Civil EngineeringJournal,2008,42(5):13-20(in Chinese))
[3]GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001(GB 50011—2001 Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2001(in Chinese))
[4]GB/T18208.3—2000地震现场工作第三部分:调查规范[S].北京:中国标准出版社,2000(GB/T 18208.3—2000 Post-earthquake field works—Part 3:Code for fieldsurvey[S].Beijing:Standards Press of China,2000(inChinese))
[5]王晓青,王龙,王岩,等.汶川8.0级大地震应急遥感震害评估研究[J].震灾防御技术,2008,3(3):251-258(Wang Xiaoqing,Wang Long,Wang Yan,et al.Study onthe damage assessment of Wenchuan Ms8.0 earthquakebased on remote sensing imagery[J].Technology forEarthquake Disaster Prevention,2008,3(3):251-258(inChinese))
[6]Comite Euro-International du Beton.Seismic design of rein-forced concrete structures for controlled inelastic response[M].London:Thomas Telford,1998
[7]Eurocode 8:Design of structures for earthquake resistance-Part1:general rules,seismic actions,design rules forbuilding,foundations and retaining structures[S].London:Thomas Telford,2005
[8]韦锋,李英民,傅剑平,等.对我国钢筋混凝土框架抗震性态控制效果的识别[J].土木工程学报,2008,41(4):8-16(Wei Feng,Li Yingmin,Fu Jianping,et al.Verification of seismic performance control effects ofreinforced concrete frames in China[J].China CivilEngineering Journal,2008,41(4):8-16(in Chinese))
[9]2006 International building code[S].United States:Inter-national Code Council,Inc.,2006
[10]ACI 318-08 building code requirements for structural concreteand commentary[S]
[11]韦锋.钢筋混凝土框架和框架-剪力墙结构非弹性地震反应性态的识别[D].重庆:重庆大学,2005(Wei Feng.Verifications of inelastic seismic response performance ofreinforced concrete frame and frame-wall structures[D].Chongqing:Chongqing University,2005(in Chinese))
[12]BS EN 1998-1:2004 Eurocode 8:Design of structures forearthquake resistance-Part1:general rules,seismic actionsand rules for buildings[S]
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