消能支撑加固底部框架砌体房屋的弹塑性地震反应分析
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摘要
本文采用弹塑性时程分析方法,对底部框架多层砌体房屋在不同烈度罕遇地震作用下进行了抗震性能评估;研究了在底部框架内增设消能外包混凝土无粘结钢支撑对房屋抗震性能的影响;对增设消能支撑加固方案和增设抗震墙加固方案进行了对比分析。分析结果表明,在底层框架砌体房屋的底层增设消能支撑可显著降低底层框架的最大层间位移,控制结构的塑性损伤,提高结构的抗震性能。增设消能支撑加固方案与增设抗震墙加固方案相比,结构加固更合理、更易实施。
This paper evaluates the seismic performance of brick masonry buildings with piloti-story under seldom occurred earthquakes by nonlinear time history analysis, and investigates the effect on seismic performance of the building by retrofitting piloti-story with energy-absorpting unbonded steel braces encased in concrete, and compare the analytical results of two kinds of retrofitting methods, that is, retrofitting piloti-story with unbonded steel braces and with RC shear wall. As a result, the retrofitting piloti-story with unbonded steel braces can reduce the displacement response of the story, control the damage of the structure, and improve the seismic performance of the building. Retrofitting piloti-story with unbonded steel braces is more reasonable and easier to construct than with RC shear wall.
This paper evaluates the seismic performance of brick masonry buildings with piloti-story under seldom occurred earthquakes by nonlinear time history analysis, and investigates the effect on seismic performance of the building by retrofitting piloti-story with energy-absorpting unbonded steel braces encased in concrete, and compare the analytical results of two kinds of retrofitting methods, that is, retrofitting piloti-story with unbonded steel braces and with RC shear wall. As a result, the retrofitting piloti-story with unbonded steel braces can reduce the displacement response of the story, control the damage of the structure, and improve the seismic performance of the building. Retrofitting piloti-story with unbonded steel braces is more reasonable and easier to construct than with RC shear wall.
引文
[1]日本建築学會．1995年兵庫県南部地震铁筋コンクミリ-ト造建築物の被害調查報告書(第Ⅳ編共同住宅)[R]．日本建築學會，1997．
[2]張翠萍，山川哲雄．台湾集集地震によゐ建築物被害と台湾·沖縄の課題[A]．琉球大学工学部紀要[C]．2000，59：23-38．
[3]SHAMIM A S，GRACE Y．Seismic behavior of concrete columnsConfined with steel and fiber-reinforced polymer[J]．ACIStructural Journal，2002，99(1)：72-80．
[4]赵彤，刘明国，张景明．抗震加固方法在国外的若干新发展[J]．建筑结构，2001，(3)：26-29．
[5]#12
[6]龚思礼．建筑抗震设计手册[M]．北京：中国建筑工业出版社，2002．
[7]DARWIN D，PECKNOLD D A．Analysis of RC shear panels under cyeHc loadings[J]．Journal of Structural Division，ASCE，1976，102(ST2)：355-369．
[8]VECCHIO F J，COLLINS M P．The response of reinforced concrete to in-plane shear and normal stress[R]．Pubheation No．81-03，Department of Civil Engineering，University of Toronto，1982．
[9]吕西林，金国芳，吴晓涵．钢筋混凝土结构非线性有限元理论与应用[M]．上海：同济大学出版社，1997．
[10]#12
[11]#12
[12]SAENZ L P．Discussion of equation for the stress-strain curve of concrete by Desayi and Krishnan[J]．Journal of ACI，1964， 61(9)：1229-1235．
[13]#12
[14]GB 50011-2001 建筑抗震设计规范[S]．
[2]張翠萍，山川哲雄．台湾集集地震によゐ建築物被害と台湾·沖縄の課題[A]．琉球大学工学部紀要[C]．2000，59：23-38．
[3]SHAMIM A S，GRACE Y．Seismic behavior of concrete columnsConfined with steel and fiber-reinforced polymer[J]．ACIStructural Journal，2002，99(1)：72-80．
[4]赵彤，刘明国，张景明．抗震加固方法在国外的若干新发展[J]．建筑结构，2001，(3)：26-29．
[5]#12
[6]龚思礼．建筑抗震设计手册[M]．北京：中国建筑工业出版社，2002．
[7]DARWIN D，PECKNOLD D A．Analysis of RC shear panels under cyeHc loadings[J]．Journal of Structural Division，ASCE，1976，102(ST2)：355-369．
[8]VECCHIO F J，COLLINS M P．The response of reinforced concrete to in-plane shear and normal stress[R]．Pubheation No．81-03，Department of Civil Engineering，University of Toronto，1982．
[9]吕西林，金国芳，吴晓涵．钢筋混凝土结构非线性有限元理论与应用[M]．上海：同济大学出版社，1997．
[10]#12
[11]#12
[12]SAENZ L P．Discussion of equation for the stress-strain curve of concrete by Desayi and Krishnan[J]．Journal of ACI，1964， 61(9)：1229-1235．
[13]#12
[14]GB 50011-2001 建筑抗震设计规范[S]．
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