钢管混凝土拱桥施工过程力学特性研究与优化-桥梁与隧道工程专业论文.docxVIP

摘要 浙江大学硕士学位论文2006 5 摘 要 本文针对钢管混凝土拱桥的研究现状以及存在问题，结合湖州市九九桥工程 实例，对钢管混凝土拱桥施工过程力学性分析、系梁预应力张拉、吊杆张拉优化 与施工控制等方面作了一定的研究分析。 根据实际施工情况建立施工过程模拟平面有限元模型，进行钢管混凝土拱桥 施工过程仿真分析，分析施工过程中结构的受力性能，预测施工过程中的应力和 变形的发展情况，并给实际施工监控提供依据和理论指导。 分析施工过程中系梁预应力张拉对结构力学性能的影响，并以施工过程中最 大应力最小为目标优化了系粱预应力张拉工序。 建立钢管混凝土拱桥吊杆张拉力优化模型，采用最小弯曲能量法进行施工过 程和成桥状态吊杆张拉力的优化，并分析吊杆张拉力优化后桥梁结构的受力性 能。 结合施工力学思想，对施工过程中吊杆张拉施工控制进行研究，考虑吊杆张 拉相互影响、支架自动卸落等因素建立有限元模型，运用影响矩阵法计算吊杆张 拉以及内力调整的一次张拉至目标值的初始张拉力。并对比分析旌工中常用的张 拉顺序，得出最优的吊杆张拉顺序。 关键词：钢管混凝土拱桥施工过程仿真分析预应力张拉吊杆张拉施工 控制优化  Abs订act 浙江大学硕士学位论文2006．5 Abstract In orderto study actual时of Concrete一矗lled steel Tubular arch嘶dge and ttle questions，based on me eng曲eering of‘‘JIU JIU BRIDGE nq HUZHOU CITY” sⅡ1lctllre aIlalysis during the constrIlction procedllre，constn】ction of pre-sn_ess on collar beam a11d c伽trol of tension in suspender and conn．ol of me construction for Concrete锄led Stcel Tubular arch晰dge have been studied in tllis paper First，Pl柚e model of Concrete一61led Steel Tubulaf arch bridge啪s set up by finite element analysis sofhvare for bridge structm_e to aIlalyze structm℃d11ring the cons仃uction pmcedurc．Based on me structure’s a11alysis of the constlllction，the development of stress a11d displacemem during construction was predicted to proVide direction fbr actIlal construction． Second，the ef传ct of pre—s订ess on collar be啪was stndied．Base on tlle study， cons廿uction procedure of the p∞·stress on collar beam was optimiZed，and{he target ofoptimization aimed at minimizing血e maxim眦s信ess dlmng constnlction． Third，the model of optimization for suspenders’tension如Concrete—fillcd Steel Tubular盯ch bridge w嬲set up．Suspenders’tension in nnished state a11d d证ng me constmction was optimized by Least Bend Energy Theoretic．And t11e p印er锄alyzcd stmcture pe由Ⅱnallce of C0ncrete—filled steel Tubmar arch撕dge when suspenderS’ tension was optimized． Finally’according to t圭1e idea of tlle con蛐nlction mechanics，nle paper also researched on tIle course of stretching suspender of Concrete—filled Steel Tubular arch brid