竹胶板—混凝土组合桥面板PBL连接件试验研究

发布时间：2018-06-07 23:56

本文选题：竹胶板-混凝土组合桥面板 + B-PBL剪力连接件　；参考：《东南大学》2015年硕士论文

【摘要】：竹材是一种绿色环保型建筑材料,在土木工程建筑领域具有广阔的发展前景,其以竹胶板为主的系列产品现已被广泛应用于车辆、建筑、造船等领域,但目前竹胶板应用于组合桥面板方向的研究还处于起步阶段。国内近年开发出一种将竹材板竖向排列并通过张拉预应力筋形成叠合板的应力层压式竹胶板结构,以应力层压式竹胶板作为基层,与上层混凝土组合成复合桥面板,简称竹胶板-混凝土组合桥面板,它能有效地改善混凝土桥面板的受力。国外对于木-混凝土组合结构的研究已相当成熟,竹胶板具备与木板相似的物理力学性质,因此竹胶板-混凝土组合桥面板的研究可借鉴于国外学者对木-混凝土组合结构的系列研究。竹胶板-混凝土组合桥面板的研究首要解决的重点是两者之间的界面连接问题,连接的好坏直接决定着组合结构的力学性能,所以本文着重研究竹胶板-混凝土组合桥面板的剪力连接件设计及其相关力学性能。研究采用竹胶板-混凝土-竹胶板组合形式立方体推出件,连接方式为部分竹胶板伸入混凝土中,并穿插钢筋的PBL连接件形式。本文研究对象为竹胶板-混凝土组合桥面板的剪力连接件,主要做了如下试验研究工作：1)文献阅读,竹材物理力学性能整理。本文研究前,大量阅读国外对于木-混凝土组合结构剪力连接件的研究论文,结合钢-混凝土组合结构PBL连接件研究,提出三种单向竹胶板-混凝土组合桥面板B-PBL连接件形式。文中所采用的竹材物理力学性能是综合马雪媛等人所做的竹胶板物理力学性能试验成果得到的。2)三类B-PBL连接件推出件推出试验的ABAQUS数值模拟针对本文提出的三种竹胶板-混凝土组合桥面板B-PBL连接件形式,利用ABAQUS有限元软件分别建立推出试验有限元模型,初步模拟室内推出试验,计算得到三类B-PBL连接件的极限承载力和抗剪滑移刚度,为后续室内试验提供仪器选择的参考和试件尺寸的确定,同时预估各类试件可能发生的破坏形式。3)三类B-PBL连接件推出件的推出试验研究根据既定推出件尺寸制作推出件实体模型,进行室内推出试验。试验研究三种B-PBL连接件形式对应试件的极限承载力、相对滑移值和破坏形式,以获得三类B-PBL连接件的抗剪承载力和滑移模量,并与前述有限元模型分析的结果进行对比分析。4)双向竹胶板-混凝士组合桥面板B-PBL连接件ABAQUS数值模拟在前述单向竹胶板-溉凝土组合推出件有限元模型初步模拟和室内推出试验的基础上,对双向竹胶板-混凝土组合推出件B-PBL连接件进行深入的有限元模型分析,分析竹胶板材料特性的变化、连接钢筋直径的变化、连接竹胶板厚度的增大、凹口深度的增大等对相应连接件试件的承载力和抗剪刚度的影响。在竹胶板自身不被剪切破坏的情况下,三类B-PBL连接件均表现出非常高的抗剪承载力和滑移模量,试验研究表明竹胶板-混凝土组合桥面板中不宜使用单向竹胶板,而应改为双向竹胶板。
[Abstract]:Bamboo is a green and environment-friendly building material. It has a broad development prospect in the field of civil engineering and building. Its series of products mainly with bamboo board are now widely used in vehicles, buildings, shipbuilding and other fields. But at present, the research on the application of bamboo board to the direction of composite bridge deck is still in its infancy. In recent years, a kind of development has been developed in China. The bamboo board is arranged vertically and the stress layer bamboo board structure of the laminated plate is formed by tensioning prestressing tendons. The stress layer pressure bamboo board is used as the base, and the upper concrete is combined into a composite bridge panel, which is referred to as the bamboo board concrete composite bridge panel. It can effectively improve the stress of the concrete bridge deck. The research on the composite structure has been quite mature, the bamboo board has the physical and mechanical properties similar to the wood board, so the study of the bamboo board concrete composite bridge panel can be studied by the foreign scholars on the series of wood concrete composite structures. The key to the study of the study of the bamboo board concrete composite bridge panel is the interface connection between the two. The quality of the connection directly determines the mechanical properties of the composite structure, so this paper focuses on the study of the design and related mechanical properties of the shear connectors of the bamboo board concrete composite bridge deck. In this paper, the research object is the shear connector of the bamboo board concrete composite bridge deck. The main research work is as follows: 1) literature reading and the physical and mechanical properties of bamboo. Before this study, a large number of foreign research papers on shear connectors for wood concrete composite structures were read, combined with steel mixing. 1 Study on the PBL connection of the composite structure of the condensing soil, three kinds of unidirectional bamboo board concrete composite bridge deck B-PBL connections are put forward. The physical and mechanical properties of the bamboo materials used in this paper are the.2 of the results of the physical and mechanical performance test of the bamboo plywood made by Ma Xueyuan et al.) the ABAQUS numerical simulation of the introduction test of the three kind of B-PBL connecting piece According to the three kinds of bamboo board concrete composite bridge deck B-PBL connection form proposed in this paper, the finite element model of the launch test is established by ABAQUS finite element software. The initial simulation test is carried out in the laboratory, and the ultimate bearing capacity and the shear slip stiffness of the three kinds of B-PBL connectors are calculated, which provide the reference for the selection of the instrument for the follow-up laboratory test. The determination of the size of the test and test parts, and the prediction of the possible failure forms of various types of specimens.3) the launch test of the three kind of B-PBL connector is studied. The solid model is made according to the size of the established parts, and the experiment is carried out indoors. The ultimate bearing capacity, the relative slip value and the relative slip value of the corresponding specimens of the three kinds of B-PBL connectors are tested and studied. The shear strength and the slip modulus of the three types of B-PBL connectors were obtained, and the results were compared with the results of the previous finite element model analysis (.4). The numerical simulation of the B-PBL connector of the two-way bamboo board and the coagulant composite bridge panel was carried out by the numerical simulation of the finite element model of the one direction bamboo board and the irrigated soil assembly. On the basis of the experiment, the finite element model analysis is carried out on the B-PBL connector of the two-way bamboo board concrete combination piece. The change of the material characteristics of the bamboo board, the change of the diameter of the steel bar, the increase of the thickness of the bamboo board, the increase of the depth of the concave mouth, and the influence of the bearing capacity and the shear stiffness of the corresponding fittings are analyzed. Under the condition that the bamboo board itself is not destroyed by shear, the three types of B-PBL connectors show very high shear capacity and slip modulus. The experimental study shows that the one-way bamboo board should not be used in the bamboo board concrete composite bridge deck, but it should be changed into two way bamboo board.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U446

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