钢管混凝土拱桥灌注施工仿真分析-桥梁与隧道工程专业论文.docxVIP

西安建筑科技大学硕 士学位论文 of different construction，has compared with electing the comparat ively rational order of pouring into from it; Consider because arched bridge store installation error in，use material itself store defect in and load the d巳viation of theμint of application in construction etc，it is not in tbe ideal linear state to join thc rib，so，in order to go still one step further to study the stability that the arcbed bridgc is pouring into the course， this text non-linear geome位y non-linear to consider material and material and geometry double non-linear factor analyze bucking to construction strucωre of arched bridge of ωurse; We k.now our country is that an earthquake occ旧 frequently in the area，the impact 00 structure of the bridge of earthquake functionωnt be ignored ，study different stage of pouring into and earthquake 缸nction earthquake of arched bridge respond，can m出t for construction by chance，bappen suddenly state offer benefìcial help in the course at the coupling，prevcnt trouble before it happens，so，出js text tries to study and pours into the response of the arched bridge iu eartbquake function happens sudden]y C出es in the ∞urse，0能r the reference basis for antidetonatioo of resisting shock of the construcbon course. Keywords: Stee] pipe concretes arched bridge，construction stage，Perfusion，non-linear， flexure，Dynarnic Analysis 西安建筑科技大学顿 士学位论文 目录 i绪论……………·……………… 1 1.1 拱桥的发展历史及铜管混凝 土拱桥在我国的应用… 1 l.1.1拱桥的发展历史……. 1 1.1.2钢管混凝土拱桥简介及其在我国的发展历程…………3 1.2 课题的提出及本文研究的内 容 …·…… ……6 l.2.1本文研究的目的………………………… 6 1.2.2本文研究的主要内容………..… 6 2 铜管混凝土拱桥灌注顺序的优化研究 …………8 2.1 工程概况…… 8 2.2 建立各灌注阶段的线性有限元模型……… 9 2.2.1 单元的选用………………… 9 2.2.2 计算假定及整体模型…...: 12 2.3 钢管混凝土拱桥灌注顺序分析 ，14 2.3.1 灌注顺序对拱肋变形的影响 ……………·…16 2.3.2 灌注顺序对拱肋应力的影响…………20 2.3.3灌注顺序特征值稳定系数的影响…..…24 2.3.4分析结果及结论…… 26 2.4 本章小结………….. ………27 3 制管混凝土拱桥非线性分析…… 28 3.1结构非线性分析概述…………………..…28 3.2 材料非线性问题的有限单 元法概述…..…………30 3.2.1弹塑性问题的增量方程…·……………31 3.2.2 弹塑性问题的增量有限元格式 … 31 3.3 几何非线性问题的有限 单元法概述