锈蚀钢筋混凝土桥墩滞回性能的数值模拟
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摘要
基于钢筋混凝土桥墩低周反复荷载试验结果,利用ANSYS有限元分析软件,建立桥墩的有限元计算模型,并对其进行承载力验证及低周反复荷载试验下全过程的非线性有限元分析,与相应试验结论吻合较好。通过施加温度场模拟钢筋锈胀力对混凝土桥墩的作用,进一步研究钢筋锈蚀后桥墩在不同锈蚀率下滞回曲线、骨架曲线以及桥墩耗能能力。分析比较表明:用温度场模拟钢筋锈胀力对混凝土桥墩的作用可以取得令人满意的结果。本方法可供锈蚀桥墩的抗震性能研究参考。
Based on the low-cycle reversed loading tests,reinforce bridge piers were modeled with ANSYS software and the low-cycle reversed loading tests were non-linearly simulated.The calculated hysteretic curves of the finite element mode by analysis were also agreed well with experimental results.The corrosion effect of steel bar to bridge pier were simulated by temperature field.The hysteretic curves,skeleton curves,and energy dissipation capacity of the bridge piers in different corrossion rate were obtained.It is shows that temperature field simulation can be used satisfactorily to the corrosion effect of steel bar.This method has guiding significance to the seismic research of corroded reinforced concrete members.
Based on the low-cycle reversed loading tests,reinforce bridge piers were modeled with ANSYS software and the low-cycle reversed loading tests were non-linearly simulated.The calculated hysteretic curves of the finite element mode by analysis were also agreed well with experimental results.The corrosion effect of steel bar to bridge pier were simulated by temperature field.The hysteretic curves,skeleton curves,and energy dissipation capacity of the bridge piers in different corrossion rate were obtained.It is shows that temperature field simulation can be used satisfactorily to the corrosion effect of steel bar.This method has guiding significance to the seismic research of corroded reinforced concrete members.
引文
[1]惠云玲,李荣,林志坤.混凝土基本构件钢筋锈蚀前后性能试验研究[J].工业建筑,1997,27(6):14-18.
[2]金伟良,赵羽习.混凝土结构耐久性[M].北京:科学出版社,2002.
[3]赵羽习,金伟良.混凝土锈胀时刻钢筋锈蚀率的数值分析方法[J].浙江大学学报:工学版,2008,42(6):1080-1084.
[4]司炳君,李宏男,王东升,等.基于位移设计的钢筋混凝土桥墩抗震性能试验研究(I):拟静力试验[J].地震工程与工程振动,2008,28(1):123-129.
[5]GB 50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[6]徐善华.混凝土结构退化模型与耐久性评估[D].西安:西安建筑科技大学,2002.
[7]司炳君,孙治国.利用ANSYS模拟桥墩滞回性能的建模方法[J].武汉理工大学学报,2007(6):76-79.
[8]倪诗格.结构试验中屈服变形的确定方法[J].工业建筑,1996,26(8):45-50.
[2]金伟良,赵羽习.混凝土结构耐久性[M].北京:科学出版社,2002.
[3]赵羽习,金伟良.混凝土锈胀时刻钢筋锈蚀率的数值分析方法[J].浙江大学学报:工学版,2008,42(6):1080-1084.
[4]司炳君,李宏男,王东升,等.基于位移设计的钢筋混凝土桥墩抗震性能试验研究(I):拟静力试验[J].地震工程与工程振动,2008,28(1):123-129.
[5]GB 50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[6]徐善华.混凝土结构退化模型与耐久性评估[D].西安:西安建筑科技大学,2002.
[7]司炳君,孙治国.利用ANSYS模拟桥墩滞回性能的建模方法[J].武汉理工大学学报,2007(6):76-79.
[8]倪诗格.结构试验中屈服变形的确定方法[J].工业建筑,1996,26(8):45-50.
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