木框架新型节点形式及其对结构性能的影响

发布时间：2018-05-31 06:05

本文选题：木结构 + 新型节点　；参考：《东南大学》2014年硕士论文

【摘要】：连接节点影响到结构的整体性能,木结构由于自身的特点其连接节点对结构的影响更为显著,因此连接节点的设计是木结构设计中最关键的内容。随着技术的进步,木结构开始向大跨度、多层方向发展,因此需要设计具有较高承载力且延性性能良好的节点才能满足结构的要求。木材-钢填板螺栓连接节点延性性能较差且具有较低的抗弯承载力,当受到如地震作用时,节点可能承受弯矩作用,从而节点过早破坏,因为节点的抗弯承载力受到木材较低的横纹抗拉强度及顺纹抗剪强度的限制,因此,为了避免木梁柱螺栓-钢填板节点的脆性破坏,采取—些改进方法具有重要的工程实际价值。本文在木材-钢填板螺栓连接节点的基础上设计了两种新型的木节点,通过对比木材-钢填板螺栓节点研究新型节点的破坏机理和力学性能,并根据Johansen屈服模式推导了新型节点的承载力计算公式,主要内容可以分为以下几个部分；本文首先进行胶合木材的材性试验,为节点承载力计算提供材性指标。进行了木材-钢填板螺栓连接节点及两组新型节点的低周反复试验,研究木材-钢填板螺栓连接节点及新型节点的破坏机理及力学性能。分析了木材-钢填板螺栓连接节点及新型节点的承载力计算方法,其计算结果与试验值吻合良好。研究了半刚性节点结构计算的基本理论,并结合算例分析半刚性节点对结构性能的影响。
[Abstract]:The connection node affects the overall performance of the structure, and the connection joint has a more significant impact on the structure because of its own characteristics, so the design of the connection joint is the most important content in the design of the wood structure. With the development of technology, the wood structure begins to develop in the direction of long span and multi-story, so it is necessary to design the joints with high bearing capacity and good ductility to meet the requirements of the structure. With poor ductility and low flexural bearing capacity of lumber-steel bolted connection joints, the joints may suffer bending moment when subjected to earthquake, thus the joints will be destroyed prematurely. Because the flexural capacity of the joints is limited by the low transverse tensile strength of wood and the shear strength along the grain, therefore, in order to avoid the brittle failure of Liang Zhu bolt-steel filler joints, It is of great practical value to adopt some improved methods. In this paper, two new types of wood joints are designed on the basis of bolted connections of lumber and steel fillers. The failure mechanism and mechanical properties of the new joints are studied by comparing the bolt joints with steel fillers. According to the Johansen yield model, the calculation formula of the bearing capacity of the new joint is derived. The main contents can be divided into the following parts. Firstly, the timber property test of glued wood is carried out in order to provide the timber index for the calculation of the bearing capacity of the joint. The failure mechanism and mechanical properties of lumber steel stud bolted joints and two new types of joints were studied in this paper. The calculation method of the bearing capacity of the bolted joint and the new joint is analyzed. The calculated results are in good agreement with the experimental values. The basic theory of semi-rigid joint structure calculation is studied, and the effect of semi-rigid joint on structure performance is analyzed with an example.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9

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