拔榫状态下的古建筑木结构透榫节点试验

为了准确把握节点拔榫与木构架力学性能的关系，进而为整体结构的安全性评价提供依据。本文按照《清式营造则例》大式建筑的尺寸，建立了缩尺比为1：2的四个不同拔榫程度的一榀透榫构架模型，通过对其进行竖向加载试验，得出了节点主要破坏形式、跨中P—A曲线，根据试验数据，分析了透榫半刚性连接特性和不同拔榫下榫卯节点的受力过程，并首次提出了榫卯连接受力过程分为铰接和刚接两个阶段。研究结果，可为古建筑研究者在进行类似结构分析及修缮加固中提供参考依据。

Experimental Study on Dovetail Joint in Historic Timber Buildings Under the State of Out of Mortise

In order to accurately grasp the node tenon＇s relationship with timber frame mechanical properties, which provide the basis for safety evaluation of the whole structure of. Clear pattern construction, this paper, in accordance with the cases of big architecture size, set up four different scale of 1：2 ratio of tenon pull degree of cross through the tenon structure model, through carries on the vertical loading test, the main failure forms, across nodes in the P -delta curve, according to the experimental data, was analyzed through tenon semi-rigid connection properties and pull out the stress of the tenon mortise and tenon joint nodes under process, and put forward the mortise and tenon joint connection for the first time loading process is divided into articulated and just answer in two stages. The results of the study, researchers for ancient buildings in similar structure analysis and repair reinforcement to provide reference basis.