低配筋剪力墙双边抗震加固试验研究
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摘要
北京前三门地区有一些建于上个世纪70年代的鱼骨式剪力墙混凝土建筑。该建筑修建时间较早,受经济与技术条件限制,剪力墙混凝土强度低,配筋率不满足现行建筑抗震规范要求。北京市建筑设计研究院提出了外套式加固方案,该方案具有不入户,节能保温,增大使用面积等优点。为了检验外套式加固方案的性能,本文设计了2个双边加固剪力墙试件与2个未加固试件,对其进行了拟静力试验研究。试验结果表明,加固后墙体承载力明显提高,加固后墙体具有良好的延性。
A group of reinforced concrete buildings which were constructed during 1970s are still used in Qiansanmen area of Beijing.The structure form of these buildings is fishbone shear wall.Limited by the economic and technical conditions,the strength of concrete and reinforcement ratio does not meet the requirements of current seismic code for building structures.A reinforcement method is proposed by Beijing Architecture Design Research Institute,which strengthened the structures from the building outside.This method has some advantages e.g.shortening construction period and enlarging the house area.To investigate the effectiveness of the strengthening method,two strengthened shear walls and two original shear walls are tested in this study.The test results show that the low-reinforced shear walls strengthened from both sides exhibit much higher strength than before,and the ductility is significantly improved.
A group of reinforced concrete buildings which were constructed during 1970s are still used in Qiansanmen area of Beijing.The structure form of these buildings is fishbone shear wall.Limited by the economic and technical conditions,the strength of concrete and reinforcement ratio does not meet the requirements of current seismic code for building structures.A reinforcement method is proposed by Beijing Architecture Design Research Institute,which strengthened the structures from the building outside.This method has some advantages e.g.shortening construction period and enlarging the house area.To investigate the effectiveness of the strengthening method,two strengthened shear walls and two original shear walls are tested in this study.The test results show that the low-reinforced shear walls strengthened from both sides exhibit much higher strength than before,and the ductility is significantly improved.
引文
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[9]过镇海.钢筋混凝土原理[M].北京:清华大学出版社,1998Guo Zhen-hai.Principles of Reinforced Concrete[M].Beijing:Tsinghua University Press,1998(in Chinese)
[10]叶列平,陆新征,马千里,等.屈服后刚度对建筑结构地震响应影响的研究[J].建筑结构学报,2009,(2):17~29Ye Lie-ping,Lu Xin-zheng,Ma Qian-li,et al.Influence of Post Yielding Stiffness to Seismic Response of Building Structures[J].Journal of Building Structures,2009,(2):17~29(in Chinese)
[2]孙立富,高小旺.鱼骨式剪力墙结构抗震性能评估[J].工程抗震与加固改造,2009,(5):118~123Sun Li-fu,Gao Xiao-wang.Seismic Performance Evaluation of the Fish-bone Wall Structure[J].Earthquake Resistant Engineering and Retrofitting,2009,(5):188~123(in Chinese)
[3]郝锐坤,徐培福,黄宝清.底层大空间上层鱼骨式剪力墙结构十二层模型纵向拟动力试验研究[J].建筑科学,1986,(4):9~15Hao Rui-kun,Xu Pei-fu,Huang Bao-qing.Longitudinal Direction Pseudo Dynamic Test Research on a 12-story Fishbone Type Shear Wall Structure Model with Large Space Ground Floor[J].Building Science,1986,(4):9~15(in Chinese)
[4]张培信.高层住宅剪力墙结构抗震加固试验研究[J].工业建筑,1994,(4):24~27Zhang Pei-xin.Experimental Studies of Aseismatic Strengthening on Shear-wall of High-rise House Structure[J].Industrial Construction,1994,(4):24~27(in Chinese)
[5]邓开来,潘鹏,石苑苑,等.老旧住宅中低配筋剪力墙抗震性能试验研究[J].土木工程学报,2012,(S1):213~217Deng Kai-lai,Pan Peng,Shi Yuan-yuan,et al.Quasistatic Test of Reinforced Concrete Shear Wall with Low Concrete Strength and Reinforcement Ratio[J].China Civil Engineering Journal,2012,(S1):213~217(in Chinese)
[6]钱稼茹,吕文,方鄂华.基于位移延性的剪力墙抗震设计[J].建筑结构学报,1999,(3):42~48Qian Jia-ru,Lv Wen,Fang E-hua.Displacement Ductility-based A Seismic Design for Shear Walls[J].Journal of Building Structures,1999,(3):42~48(in Chinese)
[7]李湛.钢筋混凝土结构改造加固设计的特点和应用[J].有色金属设计,2010,(2):36~39Li Zhan.Features of Transformation and Strengthening Design for Reinforced Concrete Structure and Its Application[J].Nonferrous Metals Design,2010,(2):36~39(in Chinese)
[8]潘鹏,邓开来,石苑苑,等.低配筋剪力墙单边抗震加固实验研究[J].工程抗震与加固改造,2013(已录用)Pan Peng,Deng Kai-lai,Shi Yuan-yuan,et al.Experimental Study on Single Side Strengthening of Lowreinforced Shear Wall[J].Earthquake Resistant Engineering and Retrofitting,2013(in publish)(in Chinese)
[9]过镇海.钢筋混凝土原理[M].北京:清华大学出版社,1998Guo Zhen-hai.Principles of Reinforced Concrete[M].Beijing:Tsinghua University Press,1998(in Chinese)
[10]叶列平,陆新征,马千里,等.屈服后刚度对建筑结构地震响应影响的研究[J].建筑结构学报,2009,(2):17~29Ye Lie-ping,Lu Xin-zheng,Ma Qian-li,et al.Influence of Post Yielding Stiffness to Seismic Response of Building Structures[J].Journal of Building Structures,2009,(2):17~29(in Chinese)
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