砌体结构体外预应力抗震加固计算方法研究
|
摘要
利用砌体剪-压复合受力的相关性所带来的抗剪潜力,提出了采用体外预应力法对砌体结构进行抗震加固。通过整体张拉通长设于砌体墙外部两侧全高范围内的预应力筋对墙体施压,改善了结构自身内在的抗震性能。据库仑强度理论,以典型的四层砌体教学楼结构为例,讨论了该种抗震加固设计的简化计算方法。同时,考虑到结构各楼层各位置墙体受压状况的不同,提出了采用"预应力分级键"对预应力筋进行分级张拉的策略,实现了按照各墙体所需来施加对应大小的压应力,从而将原结构的有利因素充分调动起来为抗震加固服务,必要时还需设置柔性斜拉杆。
According to the shear strength increase of the masonry material due to the correlation of shear-compression of masonry structures,seismic retrofit method with external prestressed tendons for masonry structures is put forward for the first time.After exerting the compression on the masonry walls by stretching prestressed tendons located on both sides of the entire walls in the vertical direction from bottom to the top,the internal seismic resistant performance of masonry structures is improved.Based on the classic Coluomb friction law,a typical four floors masonry school building is adopted as an example to present the accurate calculating process for this kind of seismic retrofit method.The result shows that different seismic retrofit methods should be applied to the masonry walls under different stress states,for some prestressed tendons should be stretched step by step to satisfy the seismic requirement,while some walls should be equipped with cross flexible members to hold the remaining earthquake loads.
According to the shear strength increase of the masonry material due to the correlation of shear-compression of masonry structures,seismic retrofit method with external prestressed tendons for masonry structures is put forward for the first time.After exerting the compression on the masonry walls by stretching prestressed tendons located on both sides of the entire walls in the vertical direction from bottom to the top,the internal seismic resistant performance of masonry structures is improved.Based on the classic Coluomb friction law,a typical four floors masonry school building is adopted as an example to present the accurate calculating process for this kind of seismic retrofit method.The result shows that different seismic retrofit methods should be applied to the masonry walls under different stress states,for some prestressed tendons should be stretched step by step to satisfy the seismic requirement,while some walls should be equipped with cross flexible members to hold the remaining earthquake loads.
引文
[1]林玮,李巨文.多层砌体房屋抗震加固方法述评[J].地震工程与工程振动,2006,26(6):144-146.
[2]施楚贤.砌体结构理论与设计[M].北京:中国建筑工业出版社,2003.
[3]苏小卒.砌体结构设计[M].上海:同济大学出版社,2002.
[4]刘桂秋,施楚贤,黄靓.对砌体剪-压破坏准则的研究[J].湖南大学学报,2007,34(4):19-23.
[5]骆万康,朱希诚,廖春盛.砌体抗剪强度研究的回顾与新的计算方法[J].重庆建筑大学学报,1995,17(4):41-48.
[6]Curtin W G.Brick diaphragm walls-development,application,design and future development[J].The Structural Engineer,1980,58A(2):41-48.
[7]骆万康,王天贤.预应力抗震砖墙抗裂与承载力及其计算方法的试验研究[J].建筑结构,1995(4):24-32.
[8]骆万康,王天贤.预应力抗震砖墙构造柱中的钢筋应变问题[J].重庆建筑工程学院学报,1995,17(1):14-23.
[9]骆万康,王天贤,廖春盛,等.预应力开洞砖墙抗震性能的试验研究[J].建筑结构,1998(4):12-16.
[10]孙伟民,胡晓明,郭樟根,等.预应力砌体抗震性能的试验研究[J].建筑结构学报,2003,24(6):25-31.
[11]宋彧，周乐伟，原国华．砌体结构预应力斜拉筋加固抗震性能试验研究［J].兰州理工大学学报,2008,34(5):118-121.
[12]叶燕华,孙伟民.预应力砌体的研究应用及发展[J].南京建筑工程学院学报,2000(4):51-57.
[13]王艳晗,张春锋,吕志涛.预应力砌体结构的应用和研究[J].工业建筑,2003,33(8):42-44.
[14]洪峰,王绍博.砌体结构抗震抗剪强度分析[J].地震工程与工程振动,2000,20(3):28-33.
[15]中国建筑东北设计研究院.GB50003—2001砌体结构设计规范[S].北京:中国建筑工业出版社,2001.
[16]中国建筑科学研究院.GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[17]马人乐,卞永明,吕兆华,等.高强螺栓液压张拉器在高耸结构工程建设中的应用[J].特种结构,2008,25(2):1-2.
[18]马人乐,蒋璐,梁峰,等.体外预应力加固砌体结构振动台试验研究[J].建筑结构学报,2011,32(5):92-99.
[2]施楚贤.砌体结构理论与设计[M].北京:中国建筑工业出版社,2003.
[3]苏小卒.砌体结构设计[M].上海:同济大学出版社,2002.
[4]刘桂秋,施楚贤,黄靓.对砌体剪-压破坏准则的研究[J].湖南大学学报,2007,34(4):19-23.
[5]骆万康,朱希诚,廖春盛.砌体抗剪强度研究的回顾与新的计算方法[J].重庆建筑大学学报,1995,17(4):41-48.
[6]Curtin W G.Brick diaphragm walls-development,application,design and future development[J].The Structural Engineer,1980,58A(2):41-48.
[7]骆万康,王天贤.预应力抗震砖墙抗裂与承载力及其计算方法的试验研究[J].建筑结构,1995(4):24-32.
[8]骆万康,王天贤.预应力抗震砖墙构造柱中的钢筋应变问题[J].重庆建筑工程学院学报,1995,17(1):14-23.
[9]骆万康,王天贤,廖春盛,等.预应力开洞砖墙抗震性能的试验研究[J].建筑结构,1998(4):12-16.
[10]孙伟民,胡晓明,郭樟根,等.预应力砌体抗震性能的试验研究[J].建筑结构学报,2003,24(6):25-31.
[11]宋彧，周乐伟，原国华．砌体结构预应力斜拉筋加固抗震性能试验研究［J].兰州理工大学学报,2008,34(5):118-121.
[12]叶燕华,孙伟民.预应力砌体的研究应用及发展[J].南京建筑工程学院学报,2000(4):51-57.
[13]王艳晗,张春锋,吕志涛.预应力砌体结构的应用和研究[J].工业建筑,2003,33(8):42-44.
[14]洪峰,王绍博.砌体结构抗震抗剪强度分析[J].地震工程与工程振动,2000,20(3):28-33.
[15]中国建筑东北设计研究院.GB50003—2001砌体结构设计规范[S].北京:中国建筑工业出版社,2001.
[16]中国建筑科学研究院.GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[17]马人乐,卞永明,吕兆华,等.高强螺栓液压张拉器在高耸结构工程建设中的应用[J].特种结构,2008,25(2):1-2.
[18]马人乐,蒋璐,梁峰,等.体外预应力加固砌体结构振动台试验研究[J].建筑结构学报,2011,32(5):92-99.
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