Performance Degradation Research on Loosen Penetrated Mortise-Tenon Joints in Ancient Timber Architecture

LIU Yuanchang; LI Xianxu; DONG Jinshuang; LI Xiang

doi:10.12326/j.2096-9694.2025016

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Performance Degradation Research on Loosen Penetrated Mortise-Tenon Joints in Ancient Timber Architecture
1.Hainan State Farms Jiangong Construction Group Co.，Ltd，Haikou 570206，Hainan，China
2.College of Civil Engineering and Architecture，Hainan University，Haikou 570228，Hainan，China
3.College of Marine Science and Engineering，Hainan University，Haikou 570228，Hainan，China
Vol. 39, Issue 4, Pages: 59-67(2025)
DOI： 10.12326/j.2096-9694.2025016
稿件说明：

移动端阅览

刘渊长,李先旭,董金爽等.古建筑木结构松动透榫节点力学性能退化研究[J].木材科学与技术,2025,39(04):59-67. DOI： 10.12326/j.2096-9694.2025016.

LIU Yuanchang,LI Xianxu,DONG Jinshuang,et al.Performance Degradation Research on Loosen Penetrated Mortise-Tenon Joints in Ancient Timber Architecture[J].Chinese Journal of Wood Science and Technology,2025,39(04):59-67. DOI： 10.12326/j.2096-9694.2025016.

摘要

为研究古建筑木结构残损节点力学性能，以透榫节点为研究对象，设计4个不同松动程度的透榫节点，对其施加低周反复荷载，获得其弯矩-转角滞回曲线，对其滞回特性、骨架曲线、强度退化及承载能力与变形性能等进行分析。结果表明：各透榫节点的破坏类型均为弯曲破坏；试件滞回曲线呈“Z”形，捏缩效应明显；随着控制位移增大，试件存在显著的强度降低现象；随着松动程度的增大，透榫节点滞回曲线包围的面积降低，耗能能力减弱，极限弯矩逐渐减小，而转角逐渐增大。利用ABAQUS对松动透榫节点进行数值模拟分析，随着松动程度的增大，节点的承载力及抗侧刚度均降低。由试验结果可知，松动程度在5%~10%时，透榫节点破坏特征、滞回性能及力学性能退化较明显，建议将松动程度5%~10%作为加固的临界范围。

Abstract

In order to study the mechanical properties of ancient timber architecture damaged mortise-tenon joints

loosen damage type was selection

and the degradation laws of the penetrated mortise-tenon joints was studied. Four transparent mortise-tenon joints with different loosen rates were designed

and the bending moment-angle hysteresis curves were obtained by applying low cyclic loads. Hysteresis characteristics

skeleton curves

strength degradation

bearing capacity and deformation performance were analyzed. The experimental results indicate that the bending failure occurs in all the joints. The hysteresis curve of the specimen is “Z” shape

and the pinching effect is significant. With the increase of control displacement

the strength of the specimen decreases significantly. With the increase of the loosen rate

the area surrounded by the hysteresis curve of the joint decreases

the energy dissipation capacity weakens

the ultimate bending moment decreases gradually

and the angle increases gradually. Based on experimental investigations

numerical simulation analysis of the mortise-tenon joints was conducted using ABAQUS software to examine the effects of loosen degree on their mechanical performance. The results demonstrate that with the progression of loosen degree

both the load-bearing capacity and lateral stiffness exhibit degradation. According to experimental research results

it is recommended to define a loosening degree of 5%~10% as the critical threshold range for reinforcement decision-making.

关键词

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references

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