【作者】 杨志坚； 王文进； 康谷贻；

【Author】 YANG Zhi-jian;WANG Wen-jin;KANG Gu-yi;School of Civil Engineering, Shenyang Jianzhu University;China Petroleum Pipeline Engineering Corporation;School of Civil Engineering, Tianjin University;

【机构】 沈阳建筑大学土木工程学院； 中国石油天然气管道工程有限公司； 天津大学建筑工程学院；

【摘要】 为了研究预应力混凝土管桩的曲率延性,采用Open Sees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。现有的PHC管桩的极限曲率在0.01/m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。更多还原

【Abstract】 To study the curvature ductility of Prestressed High Strength Concrete Pile( PHC pile), the hysteretic performance of PHC pile was analyzed with Open Sees under cyclic loading. Comparison between analytical and experimental results shows that the model is capable of accurately describing the cyclic behavior of PHC pile. Finite element analysis was conducted to study the displacement ductility and curvature ductility of PHC pile. The results indicate that the hysteretic loops pinched, and the displacement ductility was bigger than 2.0. The max curvature of PHC piles should be controlled below 0.01/m used in engineering for a magnitude 7 earthquake, the ultimate curvature of PHC pile should be bigger than 0.03/m used in engineering for a magnitude 8 earthquake. The ultimate curvature of existing PHC pile is bigger than 0.01/m, the curvature ductility is above 2.8. It does not satisfy the curvature ductility demand of major earthquake, which needs to be improved.更多还原