中国古建筑木结构性能初探

研究了中国古建筑木结构的基本特点,认识到中国古代木结构的基本单元为矩形,构件之间的连接为榫卯连接.利用简单的结构模型,对中国古代木结构的稳定性、在单个构件失效时的非敏感性以及良好的抗震性能做出初步论证.

Structural Carpentry in Qing Dynasty-A Framework for the Hierarchically Modularized Chinese Timber Structural Design

This article, by using mathematical expressions, offers a scientific framework for understanding how the grading system of Qing′s structural carpentry determines the design and construction in the grand style timber architecture.The Qing′s grand style timber structure, which is ready for prefabrication and assembly, is extremely hierarchical oriented and significantly standardized. The general procedure in designing a grand style timber structure is to start with the grade that defines the basic module (dou kou); next comes with the number of bracket set (cuan), the number of longitudinal bays and the number of purlins which affect its plan and cross section; thirdly choose a roof type that determines its longitudinal section and the facade as well. A series of formulae are conducted to help depict the layout, cross sectional roof curvature and special longitudinal treatments in 4 sloped and 9 spined roofs respectively.

古建筑榫卯结构抗震性能

中国古建筑是中华文明的重要组成部分,尤其是木结构古建筑。该类古建筑数量众多且蕴含丰富的历史文化信息,因此,如何珍惜和保护这些古迹,使其免受强震的破坏是我们面临的挑战。在前人研究的基础上,进一步研究了古建筑榫卯节点的动力特性和抗震性能:针对榫卯连接的梁柱构件进行了刚度矩阵的推导;分别对二维和三维古建筑木结构进行了模态分析和地震反应时程分析,对比了榫卯节点与刚接、铰接节点结构抗震性能的差异,得到了榫卯节点具有更好抗震性能的结论;运用谱分析理论,进一步验证了三维榫卯木结构框架的良好抗震性能。