胶合木拱桥静力性能全桥模型试验与数值分析研究  

Study of Full-bridge model test and numerical analysis of static performance

作　　者：王解军[1] 屈波 王智丰[1] 占雪芳[1] WANG Jiejun;QU Bo;WANG Zhifeng;ZHAN Xuefang(College of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,Hunan,China;Hunan Zhongda Design Institute CO.LTD.,Changsha 410075,Hunan,China)

机构地区：[1]中南林业科技大学土木工程学院,湖南长沙410004 [2]湖南中大设计院有限公司,湖南长沙410075

出　　处：《中南林业科技大学学报》2018年第8期109-115,共7页Journal of Central South University of Forestry & Technology

基　　金：国家国际科技合作专项"大跨重型工程木结构材料制造及应用技术研究"(2014DFA53120);国家林业公益性行业科研专项(201304504-3);中南林业科技大学青年科学研究基金重点项目(QJ2012003A)

摘　　要：落叶松胶合木是我国自产加工的工程材,开展了一座落叶松胶合木人行拱桥的静力模型试验与有限元数值分析。模型比例1/3,模拟跨径38.07 m的实际木结构拱桥。模型拱肋、横撑、拱上框架及桥面板等主要构件均采用落叶松胶合木及钢板螺栓连接,连接件与支座采用Q235钢。对制作模型桥木材,进行了顺纹拉、压试验和抗弯弹性模量与泊松比试验。考虑结构配重、人群荷载及拱肋控制截面最不利受力,分9个工况加载,测试拱肋的应变与位移。采用有限元软件,针对木拱桥模型,建立有限元模型进行数值分析。试验与分析结果表明,落叶松胶合木拱桥的强度与刚度满足我国木结构设计规范要求,证明了落叶松胶合木可以用于实际工程。Larch plywood is our country Engineering materials for self-production and processing, In this paper, a static model test and finite element numerical analysis of pedestrian arch bridge of larch plywood are carried out. The actual wood arch bridge with a span of 38.07 meters is simulated, and its model ratio is 1 / 3 of the original bridge. The main components of the model arch rib, transverse brace, arch flame and bridge panel are all connected by the larch wood and steel plate bolt, and the connecting piece and the support are Q235 steel. The tensile and compressive tests, bending modulus of elasticity and Poisson＇s ratio test were carried out on the model bridge timber. Considering the structural counterweight, the crowd load and the most unfavorable force of the arch rib control section, and the strain and displacement of the arch rib are tested by 9 working conditions. Finite element software is used to analyze the finite element model for the wooden arch bridge model. The results of experiment and analysis show that the strength and rigidity of larch plexus arch bridge meet the requirements of wood structure design in China, and it is proved that larch wood can be used for practical engineering.

关 键 词：落叶松胶合木 拱桥 静力性能 模型试验 有限元分析 

分 类 号：S781.2[农业科学—木材科学与技术]