配高强纵筋的混凝土墩柱的地震损伤模型
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摘要
本文在引入表征高强钢筋数量的预应力度的基础上考虑最大变形和累积能量耗损的非线性组合,提出了适应于配有高强纵筋的混凝土墩柱的地震损伤模型。为验证该模型的正确性,采用有限元软件ANSYS模拟了配有不同数量的高强纵筋混凝土墩柱的滞回曲线、裂缝发展过程以及破坏情况,通过与Hindi和Sexsmith建议的混凝土墩柱的破坏等级相对照,验证了所提模型的正确性。通过将所提的损伤模型与现有的几种典型的混凝土墩柱的损伤模型作比较分析表明,所提的地震损伤模型比其它的地震损伤模型更能准确地表达配有高强纵筋的混凝土墩柱的损伤特征,与实际更相符合。
In this paper,the seismic damage model of the improved Park-Ang seismic damage is proposed on the basis of considering prestressing degree and nonlinear combination of maximum deformation and accumulated energy dissipation for elements. To verify the improved model,the finite element software ANSYS was used to simulate the process of development of the cracks and the damage level of concrete piers which equipped with different amount of high-strength longitudinal reinforcement. The validity of the improved model was verified by study on the damage index curve and the results show that the improved seismic damage model is better and more consistent with the actual than the existing seismic damage model and it can accurately describe damage index of concrete piers with high-strength longitudinal reinforcement.
In this paper,the seismic damage model of the improved Park-Ang seismic damage is proposed on the basis of considering prestressing degree and nonlinear combination of maximum deformation and accumulated energy dissipation for elements. To verify the improved model,the finite element software ANSYS was used to simulate the process of development of the cracks and the damage level of concrete piers which equipped with different amount of high-strength longitudinal reinforcement. The validity of the improved model was verified by study on the damage index curve and the results show that the improved seismic damage model is better and more consistent with the actual than the existing seismic damage model and it can accurately describe damage index of concrete piers with high-strength longitudinal reinforcement.
引文
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[13]陈鑫,阎石,李兵,等.高强钢筋高强混凝土柱损伤模型试验研究[J].工程力学,2013,30(增):154-158.CHEN Xin,YAN Shi,LI Bing,et al.Experimental study on damage model for HSC columns[J].Engineering mechanics,2013,Vol.30 suppl:154-158.(in Chinese)
[14]姜荣斌.预应力混凝土桥墩抗震性能研究[D].大连理工大学,2012.JIANG Rong-bin.Study on Seismic Performance of PRC Bridge Pier[D].Dalian:Dalian University of Technology,2012.(in Chinese)
[15]孙治国,王东升,司炳君,等.采用预应力筋进行RC桥墩地震损伤控制的试验研究[J].土木工程学报,2014,47(1):107-116.SUN Zhiguo,WANG Dongsheng,SI Bingjun,et al.Experimental research on the seismic damage control techniques for RC bridge piers by using prestressing tendons[J].Civil Engineering Journal,2014,47(1):107-116.(in Chinese)
[16]王全凤,郑济坤,周博,等.基于滞回耗能的HRBF500 RC柱抗震性能研究[J].土木工程学报,2013,46(11):22-28.WANG Quanfeng,ZHENG Jikun,ZHOU Bo,et al.Study on seismic behavior of HRBF500 RC column based on hysteretic energy[J].Civil Engineering Journal,2013,46(11):22-28.(in Chinese)
[2]Bertero R D,Bertero V V.Performance-based seismic engineering:the need for a reliable conceptual comprehensive approach[J].Earthquake Engineering and Structure Dynamics,2002,31(3):627-652.
[3]Kim T H,Lee K M,Chung Y S,et al.Seismic Damage Assessment of Reinforced Concrete Bridge Columns[J].Earthquake Structures,2005,27(4):576-592.
[4]郑山锁,侯丕吉,李磊.RC剪力墙地震损伤试验研究[J].土木工程学报,2012,45(2):51-59.ZHENG Shansuo,HOU Piji,LI Lei.Experimental study on seismic damage RC shear walls[J].Civil Engineering Journal,2012,45(2):51-59.(in Chinese)
[5]曾磊,许成祥,郑山锁.型钢高强高性能混凝土框架节点地震损伤模型[J].工程抗震与加固改造,2013,35(2):56-61.ZENG Lei,XU Chengxiang,ZHENG Shansuo.Earthquake damage model of SR high-strength high performance concrete frame joints[J].Earthquake Resistant Engineering and Retrofitting,2013,35(2):56-61.(in Chinese)
[6]梁岩,罗小勇.耐久性损伤钢筋混凝土结构抗震分析参数研究[J].建筑结构,2013,43(8)69-73.LIANG Yan,LUO Xiaoyong.Durability parameters analysis of seismic damage for reinforced concrete structures[J].Architectural structure,2013,43(8)69-73.(in Chinese)
[7]Hindi R A,Sexsmith R G.Inelastic damage analysis of reinforced concrete bridge columns based on degraded monotonic energy[J].ASCE Journal of Bridge Engineering,2004,9(4):326-332.
[8]Powell G H,Allahabadi R.Seismic damage prediction by deterministic methods:Concept and procedures[J].Earthquake Engineering and Structural Dynamics,1988,16:719-734.
[9]Krawinkler H,Zohrei M.Cumulative damage in steel structures subjected to earthquake ground motion[J].Computers and structures.198316(14):531-541.
[10]Park YJ.,Ang A.H.,Mechanistic Seismic Damage Model for Reinforced Concrete[J].Journal of Structural Engineering,2000,126:869-878.
[11]王东升,冯启民,王国新.考虑低周疲劳寿命的改进Park-Ang地震损伤模型[J].土木工程学报,2004,37(11):41-49.WANG Dongsheng,FENG Qimin,WANG Guoxin.Improved Park-Ang earthquake damage model Considering low cycle fatigue life[J].Civil Engineering Journal,2004,37(11):41-49.(in Chinese)
[12]Zatar W A,Mutsuyoshi H.Residual displacements of concrete bridge piers subjected to near field earthquakes[J].ACI Structural Journal,2002,99(6):740-749.
[13]陈鑫,阎石,李兵,等.高强钢筋高强混凝土柱损伤模型试验研究[J].工程力学,2013,30(增):154-158.CHEN Xin,YAN Shi,LI Bing,et al.Experimental study on damage model for HSC columns[J].Engineering mechanics,2013,Vol.30 suppl:154-158.(in Chinese)
[14]姜荣斌.预应力混凝土桥墩抗震性能研究[D].大连理工大学,2012.JIANG Rong-bin.Study on Seismic Performance of PRC Bridge Pier[D].Dalian:Dalian University of Technology,2012.(in Chinese)
[15]孙治国,王东升,司炳君,等.采用预应力筋进行RC桥墩地震损伤控制的试验研究[J].土木工程学报,2014,47(1):107-116.SUN Zhiguo,WANG Dongsheng,SI Bingjun,et al.Experimental research on the seismic damage control techniques for RC bridge piers by using prestressing tendons[J].Civil Engineering Journal,2014,47(1):107-116.(in Chinese)
[16]王全凤,郑济坤,周博,等.基于滞回耗能的HRBF500 RC柱抗震性能研究[J].土木工程学报,2013,46(11):22-28.WANG Quanfeng,ZHENG Jikun,ZHOU Bo,et al.Study on seismic behavior of HRBF500 RC column based on hysteretic energy[J].Civil Engineering Journal,2013,46(11):22-28.(in Chinese)
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