采用剪力墙体外加固中小学校框架结构抗震性能研究
|
摘要
体外加固具有布置灵活方便、使用功能不中断和整体性容易保证等优点,是中小学框架结构教学楼理想的加固方式。本文把体外加固方法应用于中小学校框架结构校舍的加固,并针对一个不满足抗震要求的四层中小学框架结构采用外加剪力墙的体外加固方法。通过对不同加固方案的加固结构进行弹性和弹塑性地震反应分析,研究地震作用下不同加固方案对结构的抗震性能影响,主要参数为外加剪力墙墙段宽度。数值分析结果表明,外加剪力墙可使原结构各榀框架所受的地震剪力有较大幅度的降低,剪力墙越宽降幅越大,各楼层的位移角也趋于均匀化,增设剪力墙之后结构塑性铰状态相对减缓。通过计算结果的对比分析,提出了外加剪力墙体外加固方法的一些设计建议。
External strengthening has the Advantage of arbitrary adjustment,function witho ut interruption and strong integrity,it is a excellent reinforcement scheme whic h is adopted in frame structure to enhance its seismic performance in middle and primary school.External strengthening with shear wall is applied to a 4-layer frame structure of a school building which could not meet the seismic requireme nts in this paper.Flexibility and elasto-plastic seismic response of the struc ture were analyzed by different reinforcement methods,and seismic behavior of th e structure under different reinforcement was studied,the main parameter is the width of shear wall.The analytical results show that the seismic force of every pin frame retrofitted reduced obviously,the decline is greater as the shear wal l is wider,and angular displacement of the floor tends to uniformity.The devel opments of plastic hinge of retrofitted frame are postponed comparing these of o riginal frame.Based on the analysis results,some design suggestions of external strengthening with shear wall for frame structure is proposed.
External strengthening has the Advantage of arbitrary adjustment,function witho ut interruption and strong integrity,it is a excellent reinforcement scheme whic h is adopted in frame structure to enhance its seismic performance in middle and primary school.External strengthening with shear wall is applied to a 4-layer frame structure of a school building which could not meet the seismic requireme nts in this paper.Flexibility and elasto-plastic seismic response of the struc ture were analyzed by different reinforcement methods,and seismic behavior of th e structure under different reinforcement was studied,the main parameter is the width of shear wall.The analytical results show that the seismic force of every pin frame retrofitted reduced obviously,the decline is greater as the shear wal l is wider,and angular displacement of the floor tends to uniformity.The devel opments of plastic hinge of retrofitted frame are postponed comparing these of o riginal frame.Based on the analysis results,some design suggestions of external strengthening with shear wall for frame structure is proposed.
引文
[1]曲折,叶列平.附加子结构抗震加固方法及其在日本的应用[J].建筑结构,2010,40(5):55-58.
[2]冯远,吴小兵,李从春,等.现浇楼梯对框架结构的抗震影响分析与建议[J].土木工程学报,2010,43(10):54-62.
[3]叶列平,曲哲,马千里,等.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52-67.
[4]BSL2004.The Building Standard Law of Japan[S].Translated by Sansei International Inc.4th ed.Tokyo:The Building Center of Japan,2004.
[5]叶列平.体系能力设计法与基于性态/位移抗震设计[J].建筑结构,2004,34(6):10-14.
[6]Saadet Toker,Ali Ihsan Unay.Re-characterization of architectural style of reinforced concrete building fa-cades by exterior seismic strengthening[J].Building and Environment,2006,41(12):1952-1960.
[7]Yasar Kaltakci M,Hakan Arslan M,Yilmaz Ulku S,et al.A new approach on the strengthening of primary school buildings in Turkey:An application of external shear wall[J].Building and Environment,2008,43(6):983-990.
[8]潘毅,杨成,赵世春,等.基于pushover方法既有结构安全性鉴定[J].西南交通大学学报,2010,45(2):174-178.
[9]黄超,季静,韩小雷,等.基于性能的既有钢筋混凝土建筑结构抗震评估与加固技术研究[J].地震工程与工程振动,2007,27(5):72-79.
[10]张胜,甘明,纪青,等.基于结构位移性能的合肥游泳馆抗震设计[J].建筑结构,2006,36(6):48-51.
[2]冯远,吴小兵,李从春,等.现浇楼梯对框架结构的抗震影响分析与建议[J].土木工程学报,2010,43(10):54-62.
[3]叶列平,曲哲,马千里,等.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52-67.
[4]BSL2004.The Building Standard Law of Japan[S].Translated by Sansei International Inc.4th ed.Tokyo:The Building Center of Japan,2004.
[5]叶列平.体系能力设计法与基于性态/位移抗震设计[J].建筑结构,2004,34(6):10-14.
[6]Saadet Toker,Ali Ihsan Unay.Re-characterization of architectural style of reinforced concrete building fa-cades by exterior seismic strengthening[J].Building and Environment,2006,41(12):1952-1960.
[7]Yasar Kaltakci M,Hakan Arslan M,Yilmaz Ulku S,et al.A new approach on the strengthening of primary school buildings in Turkey:An application of external shear wall[J].Building and Environment,2008,43(6):983-990.
[8]潘毅,杨成,赵世春,等.基于pushover方法既有结构安全性鉴定[J].西南交通大学学报,2010,45(2):174-178.
[9]黄超,季静,韩小雷,等.基于性能的既有钢筋混凝土建筑结构抗震评估与加固技术研究[J].地震工程与工程振动,2007,27(5):72-79.
[10]张胜,甘明,纪青,等.基于结构位移性能的合肥游泳馆抗震设计[J].建筑结构,2006,36(6):48-51.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心