柱-枋、梁-檩等榫卯节点、斗拱、斗拱-柱头连接节点、柱脚节点等是古建木构的关键节点，对结构整体特性起着决定性作用。对关键节点进行受力性能分析，建立适用于结构整体分析的等效有限元模型是准确分析结构整体受力性能和评估结构状态的前提。本项目拟针对目前研究成果尚不多见的平摆浮搁柱脚节点及斗拱-柱头连接节点开展节点受力性能及其等效有限元模型方面的研究。首先建立能够反映这两类关键节点受力状态、摇摆机理以及节点中各组成部件承力类型、传力机制和破坏模式的力学概念模型，清晰描述节点在整体结构中的力学作用；而后基于节点精细化有限元模型和足尺模型试验对节点受力性能、关键参数以及组成部件间的连接关系进行深入分析；最后建立能够较精准地反映这两类连接节点整体受力特性及各组成部件接触面实验特征的节点等效有限元模型，并确定模型参数与节点参数之间的定量关系，为古建木构整体分析提供计算依据。

Mortise-tenon, Dougong, Dougong-column cap joint and column foot joint are the critical joints of ancient timber structure, and they play important roles in the structural overall performance. Mechanical properties and equivalent finite element models of the critical joints are quite important to the analysis of structural overall performance and structural state assessment. This project will focus on two kinds of critical joints which are floating column foot joint and Dougong-column cap joint, of which research results are still rare at present. Firstly, establish the mechanical conceptual models which can descript the stress state and swing mechanism of the joints as well as force type, transmission mechanism and failure mode of the joint constituent components. Secondly, based on the refined finite element model and full scale model tests, mechanical properties of the joints, critical parameters which mostly influence the property of the joints and connections between the joint constituent components will be analyzed deeply. Finally, establish the equivalent finite element models which can descript the mechanical characteristics of the joints and the experimental characteristics of the contacts between the joint constituent components. The quantitative relationship between model parameters and joint parameters should also be determined. The obtained equivalent finite element model can provide basis for the overall structural analysis.