不同高强预应力管桩抗震性能的试验对比  

SEISMIC PERFORMANCE OF DIFFERENT PRESTRESSED HIGH STRENGTH CONCRETE PIPE PILES

作　　者：王铁成[1,2] 王文进[1] 赵海龙[1,2] 杨志坚[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《工业建筑》2014年第7期84-89,共6页Industrial Construction

摘　　要：工程中常采用填芯,掺加钢纤维以及配置非预应力筋等方式来增强预应力混凝土管桩的抗弯承载力,但是这些改进后的管桩在地震荷载作用下的受力性能还不明确。通过三组试件的低周往复加载试验,分别从滞回耗能延性和承载力等几个方面研究预应力混凝土管桩(PHC管桩)、预应力钢纤维高强混凝土管桩(SFPHC管桩)、添加普通钢筋的预应力高强混凝土管桩(PRC管桩)的抗震性能以及填芯对管桩抗震性能的影响。试验结果表明:添加普通钢筋能够很好地改善PHC管桩的抗震性能。填芯能够提高PHC和SFPHC管桩在往复荷载作用下的承载力并能增强PRC管桩的耗能能力。各类填芯管桩的延性相对于未填芯管桩均有明显的改善。The flexural bearing capacity of prestressed concrete pipe pile was enhanced by filling , steel fiber and nonprestressed steel bar in engineering , but the mechanical property of improved prestressed concrete pipe pile under earthquake was not clear .Based on the test results of three groups of specimens under low-cyclic loading , the hysteretic energy dissipation , ductility and bearing capacity of prestressed high strength concrete pipe pile （ PHC pile）, prestressed high strength concrete pile reinforced with steel fiber （SFPHC pile） and prestressed high strength concrete pipe pile reinforced with nonprestressed steel bar （ PRC pile） were studied respectively and the impact on the seismic performance of such pile was studied .It was shown that the seismic performance of PHC pipe pile could be improved with configuring of nonprestressed steel bar and the bearing capacity of PHC and SFPHC pipe piles under low-cyclic loading could be improved and the energy dissipation of PRC piles could be enhanced with filled in the core from the test results .The ductility of filled pipe pile had a significant improvement compared with unfilled pipe pile .

关 键 词：管桩 往复荷载 延性 抗震性能 

分 类 号：TU473.1[建筑科学—结构工程] TU435[建筑科学—土工工程]