摘要
以山西佛光寺东大殿为代表的唐代殿堂型木结构建筑年代久远,具有极其重要的历史文化价值。已有研究表明柱架层、铺作层和屋架层的水平分层结构使其具有良好的抗震性能,其中柱摇摆在抗震中发挥了重要作用。以唐代殿堂型木构架中的木柱为研究对象,对其在水平荷载作用下的抗侧机理进行了详细分析:考虑摇摆过程中柱头和柱脚受压面应力状态变化及受压区木材的弹塑性变形,将柱摇摆过程划分为六个子状态,分别建立了各子状态的几何方程、平衡方程和接触面应力分布关系;对柱头、柱脚受压面形状变化以及柱头栌斗压力合力作用点和柱脚础石支反力合力作用点的平移过程进行详细分析;建立了摇摆柱抗侧力-柱头水平位移力学模型,并通过与数值计算结果及已有理论模型的对比验证了所提模型的有效性。此外,还对比分析了唐、宋两个历史时期殿堂型木构架因柱架层构造不同而产生的抗侧性能差异。研究成果可为早期古建木构抗震性能及加固研究提供理论基础。
With a long history, palace-style timber structure buildings in Tang Dynasty, which are represented by the East Hall of Foguang Temple in Shanxi province, have significant historical and cultural values. The horizontally layered structure, including the column frame layer, Tou-Kung layer and roof frame layer, has good seismic performance, in which the rocking resistance of the columns plays an important role. Taking a single column of the palace-style timber frames in Tang Dynasty as the research object, the resistance mechanism of the rocking column under horizontal loading was analyzed. The process of the column rocking was divided into six states. The geometric conditions, equilibrium conditions and stress distribution of the contact surface for each state were obtained considering the stress-strain states of the compression surface of the column ends during rocking and that the timber in compression may induce elastic-plastic strain. The change of the shape of the compression surface of the column ends and the translation of the action points of Ludou and stone base were analyzed in detail. A mechanical model of the lateral force resistance and horizontal displacement of the rocking column was established and verified by a comparison with the results from numerical simulation and existing models. The differences of the lateral resistance of the column frames of different structural configurations in Tang and Song Dynasties were also analyzed. The results provide a theoretical basis for the study of the seismic performance and reinforcement of ancient structures in early historical period.
作者
王娟
崔志涵
张熙铭
WANG Juan;CUI Zhi-han;ZHANG Xi-ming(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing 100044,China)
出处
《工程力学》
EI
CSCD
北大核心
2021年第3期60-72,共13页
Engineering Mechanics
基金
国家自然科学基金面上项目(51978038)
高等学校学科创新引智基地计划项目(B13002)。
关键词
木构架
摇摆柱
力学模型
唐代
殿堂型
timber frame
rocking column
mechanical model
Tang Dynasty
palace-style
作者简介
崔志涵(1992−),男,广东人,硕士,主要从事古建筑木结构构架及关键节点力学性能研究(E-mail:16121009@bjtu.edu.cn);张熙铭(1996−),男,河南人,硕士生,主要从事古建筑木结构构架受力性能理论模型研究(E-mail:zhangximing21@163.com);通讯作者:王娟(1982−),女,天津人,副教授,博士,硕导,主要从事古建筑木结构受力性能与结构健康监测研究(E-mail:juanwang@bjtu.edu.cn).
