杨志坚, 王文进, 康谷贻. 往复荷载作用下预应力高强混凝土管桩延性分析[J]. 工程力学, 2016, 33(增刊): 107-112. DOI: 10.6052/j.issn.1000-4750.2015.05.S047
引用本文: 杨志坚, 王文进, 康谷贻. 往复荷载作用下预应力高强混凝土管桩延性分析[J]. 工程力学, 2016, 33(增刊): 107-112. DOI: 10.6052/j.issn.1000-4750.2015.05.S047
YANG Zhi-jian, WANG Wen-jin, KANG Gu-yi. ANALYSIS ON THE DUCTILITY OF PRESTRESSED HIGH STRENGTH CONCRETE PILE UNDER CYCLIC LOADING[J]. Engineering Mechanics, 2016, 33(增刊): 107-112. DOI: 10.6052/j.issn.1000-4750.2015.05.S047
Citation: YANG Zhi-jian, WANG Wen-jin, KANG Gu-yi. ANALYSIS ON THE DUCTILITY OF PRESTRESSED HIGH STRENGTH CONCRETE PILE UNDER CYCLIC LOADING[J]. Engineering Mechanics, 2016, 33(增刊): 107-112. DOI: 10.6052/j.issn.1000-4750.2015.05.S047

往复荷载作用下预应力高强混凝土管桩延性分析

ANALYSIS ON THE DUCTILITY OF PRESTRESSED HIGH STRENGTH CONCRETE PILE UNDER CYCLIC LOADING

  • 摘要: 为了研究预应力高强混凝土管桩的曲率延性,采用OpenSees对管桩在往复荷载作用下的滞回性能进行了有限元分析。有限元分析结果与试验结果吻合较好,模型能较好的反映管桩的滞回性能。在此基础上,对管桩在往复荷载作用下的位移延性和曲率延性进行了分析,结果表明,PHC管桩的滞回曲线捏缩比较严重,位移延性系数大于2.0;在7度设防地区应将管桩使用时的最大曲率控制在0.01 m-1以内;在8度设防地区应使用时,应保证管桩的极限曲率大于0.03 m-1。现有的PHC管桩的极限曲率在0.01 m-1以上,曲率延性系数在2.8以上,但不满足大震时的曲率延性要求,需要改善其延性。

     

    Abstract: To study the curvature ductility of a Prestressed High Strength Concrete Pile (PHC pile), the hysteretic performance of a PHC pile was analyzed with OpenSees under cyclic loading. The comparison between analytical and experimental results shows that the model is capable of accurately describing the cyclic behavior of a PHC pile. Finite element analysis was conducted to study the displacement ductility and curvature ductility of a PHC pile. The results indicated that the hysteretic loops pinched, and that the displacement ductility was bigger than 2.0. The maximum curvature of PHC piles should be controlled below 0.01 m-1, used in engineering for a magnitude 7 earthquake, and the ultimate curvature of a PHC pile should be bigger than 0.03 m-1, utilized in engineering for a magnitude 8 earthquake. The ultimate curvature of an existing PHC pile is bigger than 0.01 m-1, and the curvature ductility is above 2.8. It does not satisfy the curvature ductility demand of a major earthquake, and it needs to be improved.

     

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