配置斜筋的单排配筋混凝土低矮剪力墙动力性能试验研究
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摘要
在单排配筋混凝土低矮剪力墙的墙体或底部配置斜筋,可限制墙体斜裂缝开展,提高剪力墙的基底抗剪切滑移能力,改善其抗震性能。为了解不同斜筋布置形式对其动力性能与地震损伤破坏机理的影响,进行了3个不同配筋形式的混凝土低矮剪力墙模型振动台试验,包括1个普通单排配筋混凝土剪力墙,1个墙体内配置45°斜筋的单排配筋混凝土剪力墙,1个墙体底部配置45°斜筋的单排配筋混凝土剪力墙。在试验基础上,分析了3个剪力墙模型在弹性、开裂及弹塑性损伤破坏等不同受力阶段的自振特性与地震反应,比较了其破坏形态和加速度、位移时程反应。研究结果表明,配置斜筋能有效地提高单排配筋混凝土低矮剪力墙的抗震能力。
For the low-rise concrete shear wall with single layer of web reinforcement, the configuration of the inclined steel bars in the web or at the bottom of wall can limit horizontal shear slip at the bottom construction joints and development of diagonal cracks on the wall,resulting in the seismic performance of wall improved. In order to investigate the influence of different arrangement of inclined steel bars on the dynamic performance and seismic damage mechanism of wall, three shaking table tests of low-rise concrete shear wall models with different reinforcement arrangements were carried out, including a wall only with single layer web reinforcement,a wall with single layer of web reinforcement and 45° inclined steel bars in the web, and a wall with single layer of web reinforcement and 45° inclined steel bars at the bottom. Based the test, the dynamic characteristics,dynamic response and failure mode of each model under elastic and elastic-plastic deformation stages were compared and analyzed. The results show that the configuration of inclined steel bars can effectively improve the seismic capacity of low-rise concrete shear wall with single layer of web
reinforcement.
For the low-rise concrete shear wall with single layer of web reinforcement, the configuration of the inclined steel bars in the web or at the bottom of wall can limit horizontal shear slip at the bottom construction joints and development of diagonal cracks on the wall,resulting in the seismic performance of wall improved. In order to investigate the influence of different arrangement of inclined steel bars on the dynamic performance and seismic damage mechanism of wall, three shaking table tests of low-rise concrete shear wall models with different reinforcement arrangements were carried out, including a wall only with single layer web reinforcement,a wall with single layer of web reinforcement and 45° inclined steel bars in the web, and a wall with single layer of web reinforcement and 45° inclined steel bars at the bottom. Based the test, the dynamic characteristics,dynamic response and failure mode of each model under elastic and elastic-plastic deformation stages were compared and analyzed. The results show that the configuration of inclined steel bars can effectively improve the seismic capacity of low-rise concrete shear wall with single layer of web
reinforcement.
引文
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[2]宋良瑞.民用住宅建筑结构变化趋势分析与探讨[J].工程经济,2015(18):261-261(Song Liangrui.Analysis and discussion on change trend of civilian residential building’s structure[J].Building Economy,2015(18):261-261(in Chinese))
[3]曹万林,殷伟帅,杨兴民,等.双向单排配筋中高剪力墙抗震性能试验研究[J].地震工程与工程振动,2009,29(1):103-108(Cao Wanlin,Yin Weishuai,Yang Xingmin,et al.Experimental study on seismic performance of medium-height RC shear wall with bi-directional single row of steel bars[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(1):103-108(in Chinese))
[4]曹万林,张建伟,孙天兵,等.双向单排配筋高剪力墙抗震试验及计算分析[J].建筑结构学报,2010,31(1):16-22(Cao Wanlin,Zhang Jianwei,Sun Tianbing,et al.Experiment and analysis on seismic performance of high-rise RC Shear wall with bi-directional single layer of steel bars[J].Journal of Building Structures,2010,31(1):16-22(in Chinese))
[5]Carrillo J,Lizarazo J M,Bonett R.Effect of lightweight and low-strength concrete on seismic performance of thin lightly-reinforced shear walls[J].Engineering Structures,2015,93:61-69
[6]夏昊,黄小坤,孔慧,等.低轴压比单排双向配筋混凝土剪力墙结构性能试验研究[J].工程抗震与加固改造,2012,34(3):69-75(Xia Hao,Huang Xiaokun,Kong Hui,et al.Experimental research on structural behaviors of the RC shear wall with bi-directional single layer reinforcement under low axial force ratio[J].Earthquake Resistant Engineering and Retrofitting,2012,34(3):69-75(in Chinese))
[7]张建伟,李琬荻,曹万林,等.斜筋配置对单排配筋低矮墙抗震性能影响试验[J].哈尔滨工业大学学报,2017,49(6):28-34(Zhang Jianwei,Li Wandi,Cao Wanlin.et al.Experimental study on the influence of different inclined reinforcements collocation on seismic performance of low-rise concrete shear wall with single row of steel bars[J].Journal of Harbin Institute of Technology,2017,49(6):28-34(in Chinese))
[8]张建伟,杨兴民,曹万林,等.带斜筋单排配筋低矮剪力墙的抗震性能[J].工程力学,2016,33(增1):125-132(Zhang Jianwei,Yang Xingmin,Cao Wanlin,et al.Seismic performance of low-rise shear wall with single layer of web reinforcement and inclined steel bars.[J].Engineering Mechanics,2016,33(S1):125-132(in Chinese))
[9]张建伟,曹万林,殷伟帅.简化边缘构造的单排配筋中高剪力墙抗震性能试验研究[J].土木工程学报,2009(12):99-104(Zhang Jianwei,Cao Wanlin,Yin Weishuai.Study on seismic performance of mid-rise RCshear wall with single row of steel bars and simplified boundary elements[J].China Civil Engineering Journal,2009(12):99-104(in Chinese))
[10]GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010(GB 50010-2010 Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[11]GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50011-2010 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[12]Zhang Jianwei,Dong Hongying,Cao Wanlin,et al.Shaking table tests of low-rise shear walls made of recycled aggregate concrete[J].Structural Engineering International,2016,26(1):62-73
[13]苏启旺,许浒,吴昊,等.砖砌体结构层间位移角的探讨[J].土木工程学报,2013(增1):111-116(Su Qiwang,Xu Hu,Wu Hao,et al.Research on inter-story displacement angle of brick masonry structures[J].China Civil Engineering Journal,2013(S1):111-116(in Chinese))