Seismic performance testing of reinforcement concrete frames strengthened with Y-eccentrically brace
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摘要
Two single-storey single-span reinforcement concrete (RC) frame structures strengthened with Y-eccentrically brace were designed and manufactured to be 1/3 scale. The pseudo-dynamic testing method was used to study the mechanical characteristics and the seismic performance under El-Centro earthquake action with different peak acceleration adjusted by China's Code for Seismic Design of Buildings. The test results indicate that RC frame structures strengthened with Y-eccentrically steel brace present perfect seismic performance under strong earthquake action owing to the good ductility, strong bearing capability and fine energy absorbing capability provided by energy dissipation element and high lateral stiffness provided by diagonal braces. The seismic performance is also affected by the length of outsourcing steel at the joint between energy dissipation element of eccentric steel brace and RC frame beam. The joint should be considerably designed to make sure that shear failure can firstly occur in energy dissipation element.
Two single-storey single-span reinforcement concrete (RC) frame structures strengthened with Y-eccentrically brace were designed and manufactured to be 1/3 scale. The pseudo-dynamic testing method was used to study the mechanical characteristics and the seismic performance under El-Centro earthquake action with different peak acceleration adjusted by China's Code for Seismic Design of Buildings. The test results indicate that RC frame structures strengthened with Y-eccentrically steel brace present perfect seismic performance under strong earthquake action owing to the good ductility, strong bearing capability and fine energy absorbing capability provided by energy dissipation element and high lateral stiffness provided by diagonal braces. The seismic performance is also affected by the length of outsourcing steel at the joint between energy dissipation element of eccentric steel brace and RC frame beam. The joint should be considerably designed to make sure that shear failure can firstly occur in energy dissipation element.
Two single-storey single-span reinforcement concrete (RC) frame structures strengthened with Y-eccentrically brace were designed and manufactured to be 1/3 scale. The pseudo-dynamic testing method was used to study the mechanical characteristics and the seismic performance under El-Centro earthquake action with different peak acceleration adjusted by China's Code for Seismic Design of Buildings. The test results indicate that RC frame structures strengthened with Y-eccentrically steel brace present perfect seismic performance under strong earthquake action owing to the good ductility, strong bearing capability and fine energy absorbing capability provided by energy dissipation element and high lateral stiffness provided by diagonal braces. The seismic performance is also affected by the length of outsourcing steel at the joint between energy dissipation element of eccentric steel brace and RC frame beam. The joint should be considerably designed to make sure that shear failure can firstly occur in energy dissipation element.
引文
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[2] Keith DH, Popov EP. Characteristics of eccentrically braced frames [J]. Journal of Structural Engineering [ISSN 0733-9445], 1984, 110: 340-353.
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[5] Yu AL, Zhao BC, Li RD, et al. Experimental study on hysteretic behavior of K and Y-eccentrically braced steel frames [J]. Building Structure [ISSN 1002-848X], 2010 (4): 9-12. (In Chinese) 于安林,赵宝成,李仁达,等.K形和Y形偏心支撑钢钢框架滞回性能试验研究[J].建筑结构[ISSN 102- 848X],2010(4):9-12.
[6] Yu AL, Zhao BC, Li RD, et al. Experimental study on effect of link beam web depth-thickness ratio on energy-dissipation of Y-shaped eccentrically bracedsteel frames [J]. Journal of Earthquake Engineering and Engineering Vibration [ISSN 1671-3664], 2009, 29(6): 143-148. (In Chinese). 于安林,赵宝成,李仁达,等.耗能段腹板高厚比对Y型 偏心支撑钢框架滞回性能影响的试验研究[J].地震工程与工程振动[ISSN 1671-3664].2009,29(6):143-148.
[7] Aristizabal-Ochoa JD. Disposable knee bracing: improvement in seismic design of steel frames [J]. Journal of Structural Engineering [ISSN 0733-9445], 1986, 112(7): 1544-1552.
[8] Balendra T, Yu CY, Xiao Y. An economical structural system for wind and earthquake loads[J]. Engineering Structures [ISSN 0141-0296], 2001, 23(5): 491-501.
[9] Mofid M, Khosravi P. Non-linear analysis of disposable knee bracing [J]. Computers & Structures [ISSN 0045-7949], 2000, 75(1): 65-72.
[10] Sam MT, Balendra T, Liaw CY. Earthquake-resistant steel frames with energy dissipating knee elements [J]. Engineering Structures [ISSN 0141-0296], 1995, 17(5): 334-343.
[11] William MS, Blakeborough A, Clement D, et al. Seismic behavior of knee braced frames [J]. Proceedings of the Institution of Civil Engineers: Structures and Buildings [ISSN 0965-0911], 2002, 152(2): 147-155.
[12] Hakuno M, Shidowara M, Hara T. Dynamic destructive test of a cantilevers beam controlled by analog-computer [J]. Transactions of the Japan Society of Civil Engineering [ISSN], 1969, 171: 1-9.
[13] Tian SZ, Zhao T. Research on seismic pseudodynamic test [J]. World Information on Earthquake Engineering [ISSN 1007-6069], 2001, 17(4): 60-66. (In Chinese). 田石柱,赵桐.抗震拟动力试验技术研究[J].世界地震工程[ISSN 1007-6069],2001,17(4):60-66.
[14] Qiu FW. Numerical integration algorithm in pseudodynamic testing [J]. Journal of Haerbin Architecture and Civil Engineering Institute [ISSN 1006-6780], 1994, 27(3): 120-127. (In Chinese). 邱法维.拟动力实验中的数值积分方法[J].哈尔滨建筑工程学院学报[ISSN 1006-6780],1994,27(3):120- 127.
[15] National Standard Building Undermine Design Specification Management Group of the People’s Republic of China. GB50011-2010 Code for seismic design of buildings [S]. Beijing: China Architecture & Building Press, 2010. (In Chinese). 国家标准建筑抗震设计规范管理组.GB50011-2010 建筑抗震设计规范[S].北京:中国建筑工业出版社, 2010.
[2] Keith DH, Popov EP. Characteristics of eccentrically braced frames [J]. Journal of Structural Engineering [ISSN 0733-9445], 1984, 110: 340-353.
[3] Qian JR, Chen MS, Zhang TS, et al. The pseudo- dynamic testing of eccentrically braced steel frames [J]. Earthquake Resistance Engineering [ISSN 1002-8412], 1992(1): 15-18. (In Chinese). 钱稼茹,陈茂盛张天申,等.偏心支撑钢构架拟动力地震反应试验研究[J].工程抗震与加固改造[ISSN 1002-8412],1992 (1):15-18.
[4] Yu AL. The seismic performance testing of EK and Y braces [J]. Journal of Xi’an University of Architecture and Technology [ISSN 1006-7930], 1990, 22(3): 253- 260. (In Chinese). 于安林.EK形、Y形支撑的抗震性能试验研究[J].西安建筑科技大学学报[ISSN 1002-848X],1990,22(3): 253-260.
[5] Yu AL, Zhao BC, Li RD, et al. Experimental study on hysteretic behavior of K and Y-eccentrically braced steel frames [J]. Building Structure [ISSN 1002-848X], 2010 (4): 9-12. (In Chinese) 于安林,赵宝成,李仁达,等.K形和Y形偏心支撑钢钢框架滞回性能试验研究[J].建筑结构[ISSN 102- 848X],2010(4):9-12.
[6] Yu AL, Zhao BC, Li RD, et al. Experimental study on effect of link beam web depth-thickness ratio on energy-dissipation of Y-shaped eccentrically bracedsteel frames [J]. Journal of Earthquake Engineering and Engineering Vibration [ISSN 1671-3664], 2009, 29(6): 143-148. (In Chinese). 于安林,赵宝成,李仁达,等.耗能段腹板高厚比对Y型 偏心支撑钢框架滞回性能影响的试验研究[J].地震工程与工程振动[ISSN 1671-3664].2009,29(6):143-148.
[7] Aristizabal-Ochoa JD. Disposable knee bracing: improvement in seismic design of steel frames [J]. Journal of Structural Engineering [ISSN 0733-9445], 1986, 112(7): 1544-1552.
[8] Balendra T, Yu CY, Xiao Y. An economical structural system for wind and earthquake loads[J]. Engineering Structures [ISSN 0141-0296], 2001, 23(5): 491-501.
[9] Mofid M, Khosravi P. Non-linear analysis of disposable knee bracing [J]. Computers & Structures [ISSN 0045-7949], 2000, 75(1): 65-72.
[10] Sam MT, Balendra T, Liaw CY. Earthquake-resistant steel frames with energy dissipating knee elements [J]. Engineering Structures [ISSN 0141-0296], 1995, 17(5): 334-343.
[11] William MS, Blakeborough A, Clement D, et al. Seismic behavior of knee braced frames [J]. Proceedings of the Institution of Civil Engineers: Structures and Buildings [ISSN 0965-0911], 2002, 152(2): 147-155.
[12] Hakuno M, Shidowara M, Hara T. Dynamic destructive test of a cantilevers beam controlled by analog-computer [J]. Transactions of the Japan Society of Civil Engineering [ISSN], 1969, 171: 1-9.
[13] Tian SZ, Zhao T. Research on seismic pseudodynamic test [J]. World Information on Earthquake Engineering [ISSN 1007-6069], 2001, 17(4): 60-66. (In Chinese). 田石柱,赵桐.抗震拟动力试验技术研究[J].世界地震工程[ISSN 1007-6069],2001,17(4):60-66.
[14] Qiu FW. Numerical integration algorithm in pseudodynamic testing [J]. Journal of Haerbin Architecture and Civil Engineering Institute [ISSN 1006-6780], 1994, 27(3): 120-127. (In Chinese). 邱法维.拟动力实验中的数值积分方法[J].哈尔滨建筑工程学院学报[ISSN 1006-6780],1994,27(3):120- 127.
[15] National Standard Building Undermine Design Specification Management Group of the People’s Republic of China. GB50011-2010 Code for seismic design of buildings [S]. Beijing: China Architecture & Building Press, 2010. (In Chinese). 国家标准建筑抗震设计规范管理组.GB50011-2010 建筑抗震设计规范[S].北京:中国建筑工业出版社, 2010.
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