基于ABAQUS的新型柱-板式结构抗震性能研究
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摘要
为研究新型柱-板式空心高墩的抗震性能,以某铁路桥为工程背景,取其主墩第三阶段为研究对象,根据相似理论原理以1∶10的比例,在ABAQUS中分别建立沿空心墩纵向和横向的一个缩迟模型及横向构件对应的框架模型进行低周反复加载的非线性有限元分析,分析其滞回曲线、骨架曲线、延性、破坏特征等抗震性能.结果表明:柱-板式结构在柱和板的共同作用下,使结构的强度、刚度、延性等都比框架结构大有提高.在加载过程中先以板的剪切破坏为主,当板发生破坏后柱开始屈服进入塑性状态发生弯曲破坏.因此可得出结论:柱-板相互作用明显提高了结构的抗震性能,而且在地震作用下先通过板的破坏耗散能量,在板完全破坏前柱仍有相当大的刚度和强度,能够在强烈地震作用下保护桥墩的主体结构不发生破坏,从而提高整个桥梁结构的安全性和整体性.
In order to improve the seismic performance of new column-plate structure,the nonlinear finite element analysis is made with the reduplicated loading of low period for the hollow pier's transverse and longitudinal reduced scale model and the transverse structure's corresponding framework model in ABAQUS. This model is based on the third stage of one railway's bridge with the principle of similarity taking the ratio of 1 ∶ 10. By analysis of the seismic performance of hysteretic curve,skeleton curve,ductility and failure characteristic,etc.,it shows that due to the combined effects of the column and plate,the strength,stiffness,ductility ratio of column-plate structure are greatly improved compared to the corresponding framework structure. During the loading process,at first the plates are damaged,and then the columns began to yield and enter the plastic state. So it can be concluded that the combined effects of the column and plate can greatly improve the seismic performance of column-plate structure. If there is an earthquake,the energy can be firstly dissipated by the plates,becaused columns still have considerable strength and stiffness before the plates is damaged completely,which can protect the main structure of the piers too,so the performance of safety and integrity of the whole structure under the high intense is improved.
In order to improve the seismic performance of new column-plate structure,the nonlinear finite element analysis is made with the reduplicated loading of low period for the hollow pier's transverse and longitudinal reduced scale model and the transverse structure's corresponding framework model in ABAQUS. This model is based on the third stage of one railway's bridge with the principle of similarity taking the ratio of 1 ∶ 10. By analysis of the seismic performance of hysteretic curve,skeleton curve,ductility and failure characteristic,etc.,it shows that due to the combined effects of the column and plate,the strength,stiffness,ductility ratio of column-plate structure are greatly improved compared to the corresponding framework structure. During the loading process,at first the plates are damaged,and then the columns began to yield and enter the plastic state. So it can be concluded that the combined effects of the column and plate can greatly improve the seismic performance of column-plate structure. If there is an earthquake,the energy can be firstly dissipated by the plates,becaused columns still have considerable strength and stiffness before the plates is damaged completely,which can protect the main structure of the piers too,so the performance of safety and integrity of the whole structure under the high intense is improved.
引文
[1]罗征,李建中.低周往复荷载下空心矩形墩抗震性能试验研究[J].振动与冲击,2013,32(8):184-188.
[2]刘林.高墩大跨铁路桥梁抗震设计与减震控制研究[D].北京:北京交通大学,2004.
[3]杨少军.高风压.高地震区大跨连续钢构高墩设计与分析[J].桥梁建设,2007(2):47-50.
[4]Hines EM,Restrepo J I,Seible F.Force-displacement characterization of well-confined bridge piers[J].ACI Structural Journal,2004,101(4):537-547.
[5]Hines EM,Dazio A,Seible F.Seismic performance of hollow rectangular reinforced concrete piers with highlyconfined corner elements[R].PhaseⅢ:web crushing tests.California:University of California,San Diego,2001.
[6]张劲,王庆阳,胡守营,等.ABAQUS混凝土损伤塑性模型参数验证[J].建筑结构,2008,382(8):127-130.
[2]刘林.高墩大跨铁路桥梁抗震设计与减震控制研究[D].北京:北京交通大学,2004.
[3]杨少军.高风压.高地震区大跨连续钢构高墩设计与分析[J].桥梁建设,2007(2):47-50.
[4]Hines EM,Restrepo J I,Seible F.Force-displacement characterization of well-confined bridge piers[J].ACI Structural Journal,2004,101(4):537-547.
[5]Hines EM,Dazio A,Seible F.Seismic performance of hollow rectangular reinforced concrete piers with highlyconfined corner elements[R].PhaseⅢ:web crushing tests.California:University of California,San Diego,2001.
[6]张劲,王庆阳,胡守营,等.ABAQUS混凝土损伤塑性模型参数验证[J].建筑结构,2008,382(8):127-130.
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