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为探讨古建筑木结构的有效加固方法,以故宫中和殿某开裂的中金檩为例,采用数值模拟手段,对其加固方案进行了分析。基于该中金檩开裂现状,提出了2种加固方案:辅梁法和附加斜撑法。采用有限元分析程序ANSYS,建立了上述2种加固方案的有限元模型,进行了数值模拟分析,获得了不同加固方案条件下中金檩体系的内力和变形结果。结果表明:辅梁法虽然能改善中金檩的抗弯性能,但中金枋与辅梁相交位置很可能产生受拉破坏,因此该方案不可行;附加斜撑法满足中金檩承重体系的内力和变形要求,因而可满足中金檩加固要求。
In order to explore the effective reinforcement method of the ancient architecture wood structure, taking Zhongchuang, a cracking of Zhonghe Temple in the Forbidden City, as an example, the numerical simulation method is used to analyze its reinforcement plan. Based on the current situation of the gold 檩 cracking, two reinforcement schemes are proposed: the auxiliary beam method and the additional rip brace method. The finite element model of the above two kinds of reinforcement schemes was established by finite element analysis program ANSYS, and the numerical simulation analysis was carried out. The internal forces and deformation results of the gold 檩 system under different reinforcement schemes were obtained. The results show that although the auxiliary beam method can improve the flexural performance of the medium gold 檩, it is likely to be damaged by the tension at the intersection of the medium gold 枋 and the auxiliary beam. Therefore, this solution is not feasible. Internal force and deformation requirements, which can meet the gold 檩 reinforcement requirements.