折线先张法预制工字梁张拉台座结构的数值模拟  

Numerical simulation of tensioning pedestal structure with precast I-beam in fold-line pre-tensioning method

作　　者：王海军 蒋杨樊 刘伟 谢仔杰 陈岭 Wang Haijun;Jiang Yangfan;Liu Wei;Xie Zijie;Chen Ling(School of Architecture&Civil Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China;Basic Company of the Eighth Bureau of China Construction,Ningbo 315400,China)

机构地区：[1]黑龙江科技大学建筑工程学院,哈尔滨150022 [2]中建八局一公司基础公司,浙江宁波315400

出　　处：《黑龙江科技大学学报》2023年第6期882-888,共7页Journal of Heilongjiang University of Science And Technology

摘　　要：针对已有折线先张法张拉台座所存在的设计缺陷与耗材严重等问题,结合在建某特大桥引桥预制工字梁施工,设计了一套改进的适用于折线先张法预制工字梁的新型张拉台座——桩板式张拉台座,研究其张拉端结构,通过有限元软件Midas FEA NX建立桩板式张拉台座张拉端结构模型,分析了其在预制张拉过程中的受力及变形情况,设计了桩板式张拉台座张拉端与抗拔桩焊接结构。结果表明,给出的桩板式张拉台座张拉端各杆件承载力,以及变形均满足现场施工及规范设计要求。This paper aims to address the design defects and severe consumables of the existing tensioning pedestal with fold-line pre-tension method.Combined with the construction of prefabricated I-beam of the approach bridge of a super-large bridge in construction,the study presents an improved new tensioning pedestal-pile plate tensioning pedestal suitable for the prefabricated I-beam of the fold-line pre-tensioned method,which involves studying its tensioning end structure;performing a structural model of the tension end in the pile plate tension platform by finite element software Midas FEA NX;analyzing its stress and deformation in the process of precast tension;and designing a tension end of the pile plate tension platform and a welding part of the uplift pile.The calculation results show that the proposed bearing capacity and deformation of each end at the tension end of the pile-plate tension pedestal can meet the requirements of field construction and standard design.

关 键 词：折线先张法 预制工字梁 张拉台座 

分 类 号：TU375[建筑科学—结构工程]