燕尾榫间缝隙对八等材木构架承载性能影响分析

发布时间：2018-03-22 02:11

本文选题：古建筑木结构　切入点：燕尾榫　出处：《太原理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：木结构建筑是中国古建筑的典型代表,其历史悠久、结构复杂多样、抗震性能优越,是中国古代工匠的智慧结晶,具有极高的文物价值、社会价值和科学价值。榫卯连接是中国木结构建筑的灵魂所在,同时榫卯节点的破坏也是木结构常见震害之一,所以研究榫卯连接对古建筑木结构的保护和修缮具有重要意义。本文通过有限元软件进行模拟分析,对不同位置燕尾榫缝隙的木构架承载性能开展了分析研究。文章对榫卯连接的种类、受力机理及破坏形态进行了归纳总结。以《营造法式》作为规范,建立了八等材燕尾榫木构架模型,利用有限元软件进行数值模拟分析,研究了燕尾榫间缝隙对八等材木构架承载性能的影响。分别以无缝、端缝、侧缝和端侧缝燕尾榫木构架为研究对象,在竖向配重下水平方向施加静力往复荷载,研究了木构架的抗侧移刚度及滞回耗能性能。在不同竖向配重作用下,同种缝隙燕尾榫木构架性能不同。在水平静力往复荷载作用下,得到了木构架的滞回曲线、骨架曲线、摩擦耗能曲线和拔榫量。结果表明随着竖向配重的增大,燕尾榫木构架的滞回曲线“捏缩”现象越明显,抗侧移刚度和摩擦耗能越大。在相同竖向配重作用下,不同缝隙燕尾榫木构架性能不同。木构架的性能优劣从整体上呈现“无缝燕尾榫端缝燕尾榫侧缝燕尾榫端侧缝燕尾榫”的规律,其中侧缝对木构架抗侧移刚度、抗震等性能的损伤远大于端缝。燕尾榫缝隙的存在降低了木构架的承载性能,采取木板填充缝隙的方法建立新的木构架模型。数值模拟结果表明修缮后的木构架性能远大于带缝隙模型,并且与无缝模型接近。建立了柱根糟朽木构架模型,通过糟朽模型与完好模型的对比,分析柱根糟朽对木构架承载性能的影响。
[Abstract]:Wood structure architecture is a typical representative of ancient Chinese architecture. It has a long history, complex structure, excellent seismic performance, is the wisdom of ancient Chinese artisans, and has a high value of cultural relics. Social value and scientific value. Tenon joint is the soul of Chinese wood structure, and the destruction of joint is one of the common earthquake damage of wood structure. Therefore, it is of great significance to study the tenon and joint connection for the protection and repair of the ancient building wood structure. In this paper, the finite element software is used to simulate and analyze, This paper analyzes and studies the load-bearing performance of wood frame with dovetail tenon in different positions. This paper summarizes the types, mechanical mechanism and failure form of tenon and joint. In this paper, the model of Eight-grade wood frame with tenon and tenon is established, and the influence of the gap between tenon and tenon on the load-bearing performance of the truss is studied by using the finite element software. In this paper, the lateral joint and the end-side joint with dovetail tenon wooden frame are studied. Under the vertical counterweight, static reciprocating load is applied in the horizontal direction, and the lateral stiffness and hysteretic energy dissipation performance of the wood frame are studied. Under different vertical counterweights, the lateral stiffness and hysteretic energy dissipation of the wood frame are studied. Under horizontal static reciprocating load, hysteretic curve, skeleton curve, friction energy dissipation curve and tenon quantity of wood frame are obtained. The results show that the hysteretic curve, the skeleton curve, and the tongue-drawing quantity of the same type of slotted tenon and tenon frame are obtained under horizontal static reciprocating load. The results show that with the increase of vertical counterweight, The more obvious the "pinch" phenomenon of hysteretic curve of dovetail tenon wood frame is, the greater the anti-lateral stiffness and friction energy are. Under the same vertical counterweight, The performance of wood frame is different from that of slotted dovetail tenon. The performance of wood frame presents the rule of "seamless dovetail end joint and side joint dovetail tenon", in which the lateral joint is resistant to lateral displacement stiffness of wood frame. The damage of seismic and other properties is much greater than that of end seam. The existence of dovetail joint reduces the bearing capacity of wood frame. A new wood frame model was established by using plank filling method. The results of numerical simulation show that the performance of the repaired wood frame is much larger than that of the seamless model, and is close to the seamless model. Through the comparison between the rotten model and the intact model, the influence of post root rot on the bearing capacity of wood frame was analyzed.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU366.2

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