耗能梁段与RC框架梁连接节点的滞回性能试验
|
摘要
为研究耗能梁段与RC框架梁连接节点的抗震性能,进行了5个足尺耗能梁段与RC框架梁连接节点的低周往复加载试验,获得了连接节点的滞回曲线、承载力、变形、延性、刚度退化及耗能等。结果表明:结构胶可增强U型外包钢同RC框架梁之间的整体性,提高节点的承载力和刚度,但后期RC框架梁易出现剪切破坏。随着高强螺杆数量的增加及直径的增大,U型外包钢连接节点的承载力和刚度均呈增大趋势。总体上,U型外包钢连接节点的滞回曲线捏缩,耗能能力一般。为确保U型外包钢连接节点抗震性能的可靠性,高强螺杆应可靠传递水平剪力和弯矩,避免在整个受力过程中高强螺杆剪断失效。
In order to investigate the seismic behavior of joints between energy dissipation beam segment and RC frame beam,the low- cycle loading test of five full- scale specimens of joint between RC frame beam and energy dissipation beam segment was carried out,and the hysteretic curves,bearing capacity,deformation,ductility,stiffness degradation and energy dissipation of the test specimens were obtained. The results reveal that structural glue can enhance the connection integrity between RC frame beam and U- shaped encased steel connection,and increase the bearing capacity and stiffness of connection,but lead to shear failure mode of RC frame beam at last stage easily. With the increase of the quantity and diameter of high- strength bolts,the bearing capacity and stiffness of connection joints exhibit an increasing trend. In general,this connection joints have the pinched hysteretic curves and moderate energy dissipation capacity. To ensure the reliability of seismic behavior of U- shape steel connection joints,the high- strength bolts should transfer lateral shear and moment reliably,and avoid the shear fracture during the loading process.
In order to investigate the seismic behavior of joints between energy dissipation beam segment and RC frame beam,the low- cycle loading test of five full- scale specimens of joint between RC frame beam and energy dissipation beam segment was carried out,and the hysteretic curves,bearing capacity,deformation,ductility,stiffness degradation and energy dissipation of the test specimens were obtained. The results reveal that structural glue can enhance the connection integrity between RC frame beam and U- shaped encased steel connection,and increase the bearing capacity and stiffness of connection,but lead to shear failure mode of RC frame beam at last stage easily. With the increase of the quantity and diameter of high- strength bolts,the bearing capacity and stiffness of connection joints exhibit an increasing trend. In general,this connection joints have the pinched hysteretic curves and moderate energy dissipation capacity. To ensure the reliability of seismic behavior of U- shape steel connection joints,the high- strength bolts should transfer lateral shear and moment reliably,and avoid the shear fracture during the loading process.
引文
[1]Abou-Elfath H,Ghobarah A.Behaviour of reinforced concrete frames rehabilitated with concentric steel bracing[J].Canadian Journal of Civil Engineering,2000,27:433–44.
[2]Ghobarah A,Abou-Elfath H.Rehabilitation of a reinforced concrete frames using eccentric steel bracing[J].Engineering Structures,2001,23:745–55.
[3]杨禹丞,于安林,赵宝成.循环荷载作用下RC框架内填Y型钢支撑的试验研究[J].苏州科技学院学报(工程技术版),2010,23(2):41-45.Yang Yucheng,Yu Anlin,Zhao baocheng.Experimental study on RC frames with Y-eccentrically brace under cyclic loading[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(2):41-45.(in Chinese)
[4]何绪杰,于安林,方有珍.RC框架内填Y型偏心钢支撑的有限元分析[J].苏州科技学院学报(工程技术版),2010,23(1):34-39.He Xujie,Yu Anlin,Fang Youzhen.Finite element analysis of RC frames with Y-eccentrically brace[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(1):34-39.(in Chinese)
[5]赵宝成,于安林,蒋思成,王军良.Y形偏心钢支撑RC框架结构滞回性能试验研究[J].地震工程与工程振动,2013,33(1):47-53.Zhao Baocheng,Yu Anlin,Jiang Sicheng,Wang Junliang.Experimental investigation of Y-eccentrically steel braced RC frames energy-dissipation[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(1):47-53(in Chinese)
[6]薛黎明.内填Y型偏心钢支撑混凝土框架拟动力试验研究[D].苏州:苏州科技学院,2011.Xue Liming.The pseudo-dynamic testing and research of RC frames strengthened with Y-eccentrically brace[D].Suzhou:Suzhou University of Science and Technology,2011.(in Chinese)
[7]顾伟良,于安林,方有珍.偏心钢支撑混凝土框架结构的节点加固研究[J].苏州科技学院学报(工程技术版),2010,23(3):54-58.Gu Weiliang,Yu Anlin,Fang Youzhen.Joint reinforcement of eccentric steel bracing concrete frame structures[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(3):54-58.(in Chinese)
[8]赵宝建,于安林,钱善青.高层混凝土框架Y型支撑结构支撑布置非线性分析[J].苏州科技学院学报(工程技术版),2011,24(2):19–23.Zhao Baojian,Yu Anlin,Qian Shanqing.Nonlinear analysis on brace arrangement of high-rise reinforced concrete frames with Y-eccentrically braces[J].Journal of Suzhou University of Science and Technology Engineering and Technology),2011,24(2):19–23.(in Chinese)
[9]王军良.Y型钢支撑加固多层RC框架试验研究与非线性分析[D].苏州:苏州科技学院,2012.Wang Junliang.The experimental investigation and nonlinear analysis of multistory RC frames retroffitting with Y-steel braces[D].Suzhou:Suzhou University of Science and Technology,2012.(in Chinese)
[10]FEMA273.NEHRP commentary on the guidelines for the rehabilitation of buildings[R].Washington:Federal Emergency Management Agency,1996.
[2]Ghobarah A,Abou-Elfath H.Rehabilitation of a reinforced concrete frames using eccentric steel bracing[J].Engineering Structures,2001,23:745–55.
[3]杨禹丞,于安林,赵宝成.循环荷载作用下RC框架内填Y型钢支撑的试验研究[J].苏州科技学院学报(工程技术版),2010,23(2):41-45.Yang Yucheng,Yu Anlin,Zhao baocheng.Experimental study on RC frames with Y-eccentrically brace under cyclic loading[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(2):41-45.(in Chinese)
[4]何绪杰,于安林,方有珍.RC框架内填Y型偏心钢支撑的有限元分析[J].苏州科技学院学报(工程技术版),2010,23(1):34-39.He Xujie,Yu Anlin,Fang Youzhen.Finite element analysis of RC frames with Y-eccentrically brace[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(1):34-39.(in Chinese)
[5]赵宝成,于安林,蒋思成,王军良.Y形偏心钢支撑RC框架结构滞回性能试验研究[J].地震工程与工程振动,2013,33(1):47-53.Zhao Baocheng,Yu Anlin,Jiang Sicheng,Wang Junliang.Experimental investigation of Y-eccentrically steel braced RC frames energy-dissipation[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(1):47-53(in Chinese)
[6]薛黎明.内填Y型偏心钢支撑混凝土框架拟动力试验研究[D].苏州:苏州科技学院,2011.Xue Liming.The pseudo-dynamic testing and research of RC frames strengthened with Y-eccentrically brace[D].Suzhou:Suzhou University of Science and Technology,2011.(in Chinese)
[7]顾伟良,于安林,方有珍.偏心钢支撑混凝土框架结构的节点加固研究[J].苏州科技学院学报(工程技术版),2010,23(3):54-58.Gu Weiliang,Yu Anlin,Fang Youzhen.Joint reinforcement of eccentric steel bracing concrete frame structures[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2010,23(3):54-58.(in Chinese)
[8]赵宝建,于安林,钱善青.高层混凝土框架Y型支撑结构支撑布置非线性分析[J].苏州科技学院学报(工程技术版),2011,24(2):19–23.Zhao Baojian,Yu Anlin,Qian Shanqing.Nonlinear analysis on brace arrangement of high-rise reinforced concrete frames with Y-eccentrically braces[J].Journal of Suzhou University of Science and Technology Engineering and Technology),2011,24(2):19–23.(in Chinese)
[9]王军良.Y型钢支撑加固多层RC框架试验研究与非线性分析[D].苏州:苏州科技学院,2012.Wang Junliang.The experimental investigation and nonlinear analysis of multistory RC frames retroffitting with Y-steel braces[D].Suzhou:Suzhou University of Science and Technology,2012.(in Chinese)
[10]FEMA273.NEHRP commentary on the guidelines for the rehabilitation of buildings[R].Washington:Federal Emergency Management Agency,1996.
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