拔榫状态下透榫节点连接性能研究

发布时间：2018-04-04 20:03

本文选题：榫卯节点连接　切入点：拔榫　出处：《河北联合大学》2014年硕士论文

【摘要】：古建筑木结构是通过榫卯之间相互连接组成的整体，榫卯连接之间的稳固和安全对古建筑木结构整体的稳固与安全起到重要作用。现存古建筑木结构大多都有一定的残损，而拔榫就是古建筑木结构中最常见的残损状态，为了准确把握拔榫对木结构整体稳定性的影响，本文通过试验和有限元分析方法进行探究。采用古建筑木结构中最常见的连接形式—透榫作为研究对象。为了排除其他残损对木结构榫卯节点连接的影响，本次试验采用的材料为全新的樟子松木材。试验试件的制做，按照《清式营造则例》中大式建筑尺寸，建立缩尺比例为1:2的四个拔榫量分别为0mm、15mm、25mm、35mm的一榀构架模型；柱顶采用一次性施加20kN的集中荷载；构架竖向荷载施加在额枋三分点处，采用分步逐级加载直到构架破坏。通过对其进行竖向分级加载试验，得出节点主要的破坏形式、跨中P-△曲线、位移转角曲线等。根据试验数据发现：构架的破坏点为榫卯连接处，破坏形式为弯、剪复合破坏，拔榫能降低榫卯连接构架的承载力和变形能力。最后用ADINA有限元软件进行模拟分析，并验证试验结果的正确性；模型的尺寸按照试验试件模型尺寸大小建立，模型的个数为四个，设置方式为3-D Solid模型，并通过20个时间步进行分步加载；分析结果表明：用ADINA有限元模拟分析的结果与试验结果基本是一致的，这也验证了试验结果的真实可信。通过对不同拔榫状态下的透榫榫卯节点连接性能试验和ADINA有限元模拟分析对比发现不同拔榫对结构整体性能的影响，，及变化规律。可以为古建筑木结构修葺与加固提供参考，也可以为新建仿古木结构建筑的设计提供参考。
[Abstract]:The ancient wooden structure building is integrated by the mutual connection between the composition of the tenon, stability and safety of mortise and tenon connection between the stability and safety of the whole ancient wooden structures play an important role. The existing ancient timber structure mostly have some damage, but the most common is the ancient wooden building pull tenon structure damage the state, in order to accurately grasp the tenon pull effect on the stability of the overall structure of wood, this paper explored through experiments and finite element analysis method.
The ancient wooden building in the most common form of mortise connection as the research object. In order to eliminate the influence of other damage to the wooden structure tenon connection node, using the test materials for the new wood. Sylvestris specimen making, in accordance with the "Qing style architecture to create a large size rule", the establishment of the scale is four 1:2 Stubbs mortise respectively 0mm, 15mm, 25mm, a framework model of 35mm; use capitals concentrated load one-time application of 20kN; frame vertical load exerted on the architrave three points, by step-by-step loading until failure. Through the vertical frame of the graded loading test, that the failure the form of the main nodes in P- Delta, cross curve, displacement curve. According to the test data: the failure point framework for tenon joint damage in the form of bending, shear, pull tenon mortise and tenon connection structure can reduce The bearing capacity and deformation capacity. The simulation with ADINA finite element analysis software, and verify the correctness of test results; the size of the model according to the test specimen size, the number of models is four, set for the 3-D Solid model, and step loading through 20 time steps; the analysis results show that the use of ADINA finite element simulation analysis results and the experimental results are basically consistent, which proved the test result is credible.
Found that the impact on the overall performance of different pull tenon structure by mortise tenon mortise joints of different state pull tenon connection performance test and ADINA finite element simulation analysis and comparison, and changes in the law. Can provide reference for the repair and reinforcement of wooden structure of ancient buildings, but also can provide a reference for the design of new antique wooden buildings.

【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU366.2

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