太昊陵统天殿斗栱竖向荷载作用下应力状态分析

Stress State Analysis with Vertical Loads of Tong Tian Hall's Support in the Tai Hao Mausoleum

淮阳太昊陵统天殿斗栱是豫东地区明清时期斗栱的典型代表,为了指导其修缮与加固,选取统天殿柱头科斗栱建立有限元分析模型,采用接触非线性理论并考虑大变形对其进行受力性能分析。分析结果表明:在承载力极限状态的竖向荷载作用下,斗栱沿荷载作用方向刚度较大,变形较小;斗栱的坐斗、各昂及栱的跨中易发生横纹受压破坏;单才万栱及头昂的跨中受拉区易发生剪切破坏;斗栱中各构件接触面的边缘部位易发生应力集中。研究结果将为统天殿斗栱的修缮设计提供科学依据,并为同类斗栱的修护提供技术参考。

The Tong Tian Hall of Tai Hao Mausoleum was built in the Ming Dynasty in Huaiyang. It is a typical Ming and Qing Dynasties＇ support structure. In order to instruct its renovation program, a finite element model was established based on the measurement data at the Tong Tian Hall in this paper. Nonlinear analyses were performed for its structural performance considering large-deformation. The analysis results indicated that under the vertical load in the ultimate limit state the vertical displacement was small because of higher vertical rigidity. The support and the mid-span are prone to compression failures. Shear failures were observed in the tension area at the mid-span. Moreover, the edge of contact surface among the components were the stress concentration regions, which were prone to local failures.