预制板现浇混凝土叠合层加固砌体教学楼的抗震性能分析
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摘要
针对2008年"5·12"汶川地震中砌体结构教学楼大量倒塌这一惨痛教训,总结了实际工程中砌体结构房屋的整体性缺陷以及常用的加固方法;采用通用有限元分析软件ANSYS建立了一个典型砌体结构教学楼(预制多孔板装配式楼盖)的数值模型,施加经修正后的汶川地震波,并利用有限元时程分析方法,分析了使用现浇混凝土叠合层加固前后该砌体结构教学楼在汶川地震波下的响应,重点对比了结构的模态、变形以及应力水平。结果表明:现浇混凝土叠合层可以使墙体的变形得到有效约束,横墙和纵墙的加速度基本一致,墙体变形以及最大应力均得到减小,这说明增设现浇混凝土叠合层是一种有效的加固预制板楼盖的方法。
Considering agreat number of buildings collapsed in"5·12"Wenchuan Earthquake in2008,several integrity defects of existing masonry structures and common strengthening methods were summarized.A general finite element analysis software ANSYS was used to build an numerical model of a typical masonry teaching building with precast reinforced concrete(RC)slabs,and Wenchuan earthquake wave was input on this model.By applying finite element timehistory analysis method,the responses under seismic waves for masonry teaching buildings strengthened by cast-in-place RC layer before and after strengthening were analyzed,moreover,the structural modal,deformation and stress level were mainly compared.The results show that cast-in-place RC layer will effectively restrain the deformation of walls,thus the accelerations of cross and longitudinal walls match well,and the deformation and maximum stress of walls are reduced.This indicates that adding cast-in-place RC layer is an effective method for strengthening precast RC slabs.
Considering agreat number of buildings collapsed in"5·12"Wenchuan Earthquake in2008,several integrity defects of existing masonry structures and common strengthening methods were summarized.A general finite element analysis software ANSYS was used to build an numerical model of a typical masonry teaching building with precast reinforced concrete(RC)slabs,and Wenchuan earthquake wave was input on this model.By applying finite element timehistory analysis method,the responses under seismic waves for masonry teaching buildings strengthened by cast-in-place RC layer before and after strengthening were analyzed,moreover,the structural modal,deformation and stress level were mainly compared.The results show that cast-in-place RC layer will effectively restrain the deformation of walls,thus the accelerations of cross and longitudinal walls match well,and the deformation and maximum stress of walls are reduced.This indicates that adding cast-in-place RC layer is an effective method for strengthening precast RC slabs.
引文
[1]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.Civil and Structural Groups of Tsinghua University,Southwest Jiaotong University and Beijing Jiaotong University.Analysis on Seismic Damage of Buildings in the Wenchuan Earthquake[J].Journal of Building Structures,2008,29(4):1-9.
[2]黄冲.汶川地震后砌体结构震害调查与震害分析[D].上海:同济大学,2011.HUANG Chong.Site Investigation and Seismic Analysis of Masonry Structures About the Wenchuan Earthquake[D].Shanghai:Tongji University,2011.
[3]王庄,李遇春.既有中小学砌体结构校舍抗震加固研究[J].土木工程学报,2010,43(增):436-441.WANG Zhuang,LI Yu-chun.Study of Seismic Strengthening of Masonry Structure of Existing School Building[J].China Civil Engineering Journal,2010,43(S):436-441.
[4]GB 50011—2010,建筑抗震设计规范[S].GB 50011—2010,Code for Seismic Design of Building[S].
[5]张杰.加层改造砌体房屋的抗震鉴定与加固研究[D].武汉:华中科技大学,2004.ZHANG Jie.The Study on the Seismic Evaluation and Strengthening Method on the Added and Renovated Stories Masonry Structure Building[D].Wuhan:Huazhong University of Science&Technology,2004.
[6]朱坤.农宅开洞墙体抗震加固措施及有限元仿真分析[D].北京:北京交通大学,2011.ZHU Kun.Reinforcement Measures for Wall of Rural House with Opening and Finite Element Analysis[D].Beijing:Beijing Jiaotong University,2011.
[7]李欣.砌体抗震加固中抗剪承载力研究[D].北京:北方工业大学,2011.LI Xin.Research on Shear Capacity of Strengthened Masonry Structures[D].Beijing:North China University of Technology,2011.
[8]王静.学校多层砌体房屋抗震鉴定问题的研究[D].南昌:南昌大学,2009.WANG Jing.The Appraisal of Multi-story Masonry Building of School Based on the Seismic Performance[D].Nanchang:Nanchang University,2009.
[9]骆光威.多层砌体结构房屋震后鉴定及加固研究[D].成都:西南交通大学,2011.LUO Guang-wei.The Study on the Appraisal and Strengthening of Multi-story Masonry Buildings After Earthquake[D].Chengdu:Southwest Jiaotong University,2011.
[10]JGJ 116—98,建筑抗震加固技术规程[S].JGJ 116—98,Technical Specification for Seismic Strengthening of Building[S].
[11]爱德华·L·威尔逊.结构静力与动力分析——强调地震工程学的物理方法[M].北京金土木软件技术有限公司,中国建筑标准设计研究院,译.北京:中国建筑工业出版社,2006.WILSON E L.Static&Dynamic Analysis of Structures:Emphasis on Physical Methods of Earthquake Engineering[M].Translated by Civil King Software Technology Co.,Ltd,China Institute of Building Standard Design&Research.Beijing:China Architecture&Building Press,
[2]黄冲.汶川地震后砌体结构震害调查与震害分析[D].上海:同济大学,2011.HUANG Chong.Site Investigation and Seismic Analysis of Masonry Structures About the Wenchuan Earthquake[D].Shanghai:Tongji University,2011.
[3]王庄,李遇春.既有中小学砌体结构校舍抗震加固研究[J].土木工程学报,2010,43(增):436-441.WANG Zhuang,LI Yu-chun.Study of Seismic Strengthening of Masonry Structure of Existing School Building[J].China Civil Engineering Journal,2010,43(S):436-441.
[4]GB 50011—2010,建筑抗震设计规范[S].GB 50011—2010,Code for Seismic Design of Building[S].
[5]张杰.加层改造砌体房屋的抗震鉴定与加固研究[D].武汉:华中科技大学,2004.ZHANG Jie.The Study on the Seismic Evaluation and Strengthening Method on the Added and Renovated Stories Masonry Structure Building[D].Wuhan:Huazhong University of Science&Technology,2004.
[6]朱坤.农宅开洞墙体抗震加固措施及有限元仿真分析[D].北京:北京交通大学,2011.ZHU Kun.Reinforcement Measures for Wall of Rural House with Opening and Finite Element Analysis[D].Beijing:Beijing Jiaotong University,2011.
[7]李欣.砌体抗震加固中抗剪承载力研究[D].北京:北方工业大学,2011.LI Xin.Research on Shear Capacity of Strengthened Masonry Structures[D].Beijing:North China University of Technology,2011.
[8]王静.学校多层砌体房屋抗震鉴定问题的研究[D].南昌:南昌大学,2009.WANG Jing.The Appraisal of Multi-story Masonry Building of School Based on the Seismic Performance[D].Nanchang:Nanchang University,2009.
[9]骆光威.多层砌体结构房屋震后鉴定及加固研究[D].成都:西南交通大学,2011.LUO Guang-wei.The Study on the Appraisal and Strengthening of Multi-story Masonry Buildings After Earthquake[D].Chengdu:Southwest Jiaotong University,2011.
[10]JGJ 116—98,建筑抗震加固技术规程[S].JGJ 116—98,Technical Specification for Seismic Strengthening of Building[S].
[11]爱德华·L·威尔逊.结构静力与动力分析——强调地震工程学的物理方法[M].北京金土木软件技术有限公司,中国建筑标准设计研究院,译.北京:中国建筑工业出版社,2006.WILSON E L.Static&Dynamic Analysis of Structures:Emphasis on Physical Methods of Earthquake Engineering[M].Translated by Civil King Software Technology Co.,Ltd,China Institute of Building Standard Design&Research.Beijing:China Architecture&Building Press,
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