损伤方钢管混凝土框架加固后滞回性能试验与理论研究
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摘要
为了研究损伤方钢管混凝土结构加固后的抗震性能,基于一榀三层两跨的损伤方钢管混凝土框架加固后的拟静力试验,分析了反复水平荷载作用下框架的滞回性能,并根据滞回曲线进一步得出了框架顶层骨架曲线及相应的恢复力模型,研究了钢管混凝土框架的延性、强度与刚度的退化等性能。采用非线性有限元分析方法,将恢复力模型应用到混凝土弹性模量退化方程中,并对试验进行了数值模拟。结果表明:理论分析结果与试验结果吻合较好。
In order to study the aseismic behavior of concrete-filled rectangular tubular repaired structure, the hysteretic behavior under cyclic loading is analyzed based on a quasi-static test of a two-span, three-storey concrete-filled rectangular steel tubular repaired frame (CRSTRF). Based on the hysteretic curve, the top layer framework curve and the corresponding resilience model are obtained. The ductility characteristics, stiffness and strength degeneration are studied. Nonlinear finite element method is adopted in applying the resilience model to the degeneration equation of concrete elastic module and the numerical simulation of the test is carried out. The results show that a good agreement is reached between the theoretical analysis and available experimental results.
In order to study the aseismic behavior of concrete-filled rectangular tubular repaired structure, the hysteretic behavior under cyclic loading is analyzed based on a quasi-static test of a two-span, three-storey concrete-filled rectangular steel tubular repaired frame (CRSTRF). Based on the hysteretic curve, the top layer framework curve and the corresponding resilience model are obtained. The ductility characteristics, stiffness and strength degeneration are studied. Nonlinear finite element method is adopted in applying the resilience model to the degeneration equation of concrete elastic module and the numerical simulation of the test is carried out. The results show that a good agreement is reached between the theoretical analysis and available experimental results.
引文
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[5]Nakanishi K,Kitada T,Nakai H.Experimental study on deterioration of ultimate strength and ductility of damage concrete filled steel box columns[A].Proceedings of the4th ASCCS International Conference on Steel-Concrete Composite Structures[C].Kosice,1994.127~130.
[6]王铁成.方钢管混凝土框架在低周反复荷载作用下的非线性有限元分析[J].地震工程与工程振动,2004,24(4):82~85.Wang Tiecheng.Nonlinear finite element analysis of concreted-filled rectangular tubular frame under low-reversed cyclic loading[J].Earthquake Engineering and Engineering Vibration,2004,24(4):82~85.(in Chinese)
[7]Susantha K A S,Ge Hanbin,Tsutomu Usami.Uniaxial stress-strain relationship of concrete confined by various shaped steel tubes[J].Engineering Structures,2001,23(10):1331~1347.
[8]Chaboche J L.Constitutive equations for cyclic plasticity and cyclic viscoplasticity[J].International Journal of Plasticity,1989,5(3):247~302.
[9]Chaboche J L.On some modifications of kinematic hardening to improve the description of ratcheting effects[J].International Journal of Plasticity,1991,7(7):661~678.
[10]Shkir Khalil H.Pushout strength of concrete-filled steel hollow sections[J].The Structure Engineer,1993,71(13):230~233.
[2]蔡绍怀.现代钢管混凝土结构[M].北京:人民交通出版社,2003.Cai Shaohuai.Modem concrete-filled steel pipe structures[M].Beijing:China Communications Press,2003.(in Chinese)
[3]钟善桐.高层钢管混凝土结构[M].哈尔滨:黑龙江科学技术出版社,1999.Zhong Shantong.Concrete-filled steel pipe of high rise building[M].Harbin:Science and Technology Press of Heilongjiang,1999.(in Chinese)
[4]吕西林,陆伟东.反复荷载作用下方钢管混凝土柱的抗震性能试验研究[J].建筑结构学报,2000,21(2):2~11.Lu Xilin,Lu Weidong.Seismic behavior of concrete-filled rectangular steel tubular columns under cyclic loading[J].Journal of Building Structures,2000,21(2):2~11.(in Chinese).
[5]Nakanishi K,Kitada T,Nakai H.Experimental study on deterioration of ultimate strength and ductility of damage concrete filled steel box columns[A].Proceedings of the4th ASCCS International Conference on Steel-Concrete Composite Structures[C].Kosice,1994.127~130.
[6]王铁成.方钢管混凝土框架在低周反复荷载作用下的非线性有限元分析[J].地震工程与工程振动,2004,24(4):82~85.Wang Tiecheng.Nonlinear finite element analysis of concreted-filled rectangular tubular frame under low-reversed cyclic loading[J].Earthquake Engineering and Engineering Vibration,2004,24(4):82~85.(in Chinese)
[7]Susantha K A S,Ge Hanbin,Tsutomu Usami.Uniaxial stress-strain relationship of concrete confined by various shaped steel tubes[J].Engineering Structures,2001,23(10):1331~1347.
[8]Chaboche J L.Constitutive equations for cyclic plasticity and cyclic viscoplasticity[J].International Journal of Plasticity,1989,5(3):247~302.
[9]Chaboche J L.On some modifications of kinematic hardening to improve the description of ratcheting effects[J].International Journal of Plasticity,1991,7(7):661~678.
[10]Shkir Khalil H.Pushout strength of concrete-filled steel hollow sections[J].The Structure Engineer,1993,71(13):230~233.
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