摘要
为保护古建筑,采用理论计算与有限元模拟相结合的方法,研究了故宫太和殿三次间正身顺梁榫头下沉的原因和加固方法。考虑采用两种不同的加固方案,建立相应的计算简图和有限元模型,进行静力分析。基于分析结果,获得了加固前正身顺梁的变形及主要内力的分布特征;基于文物保护原则,对现有的两种不同加固方案进行了合理筛选。结果表明:太和殿三次间正身顺梁榫头下沉的主要原因与该位置拉、弯、剪应力过大密切相关,采取附加柱子支顶的方法对下部结构有不利影响,而钢木组合体系的加固方法更合理且满足文物保护要求。
To protect Chinese ancient building,by theoretical calculation and finite element simulation,the cause of sinkage and the strengthening method of tenon-mortise joint of the face beam in the 3rd part of Taihe Palace in the Forbidden City were studied.Two strengthening methods were considered,by which the calculation diagrams and the finite element models for the beam were built and the static analysis was carried out.Based on the analysis results,displacement and stress distributions of the face beam before strengthening were obtained.Based on the laws of cultural relics protection,two strengthening methods were discussed and the more suitable one was selected.Results show that the main cause of sinkage of the face beam tenon relates closely to the over great values of bending,tension and shear stresses at the tenon-mortise joint position.The method that strengthens tenon-mortise joint by additional columns under the face beam may bring adverse effects to the substructure,However,the method of using steel-wood composite system to strengthen the joint is more suitable,which meets the demand of cultural relics protection.
出处
《防灾减灾工程学报》
CSCD
北大核心
2016年第1期92-98,共7页
Journal of Disaster Prevention and Mitigation Engineering
基金
故宫博物院科研项目(KT2007-4)资助
关键词
榫卯节点
破坏分析
加固方案
钢木组合体系
故宫太和殿
tenon-mortise joint
breakage analysis
strengthening method
steel-wood composite system
Taihe Palace in the Forbidden City
