古建木结构榫卯连接的扁钢加固试验  

Experimental studies on seismic characteristic of strengthened mortise-tenon jointin historical timber buildings

作　　者：姚侃[1,2] 赵鸿铁[1] 薛建阳[1] 李俊华[3] 谢启芳[1] 

机构地区：[1]西安建筑科技大学,西安710055 [2]广州军区空军后勤部机场营房处,广州510052 [3]宁波大学,浙江宁波315211

出　　处：《哈尔滨工业大学学报》2009年第10期220-224,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(59878043);陕西省自然科学基础研究计划项目(98C09)

摘　　要：通过比例为1:3.52的古建木结构模型振动台试验,研究了用Q235扁钢加固榫卯连接节点的加固性能及效果.对模型加固前后的加速度、位移时程响应、自振频率和阻尼比进行了对比分析.结果表明加固后结构刚度略有提高,但符合刚度等效的加固原则,榫卯结构耗能转变为主要依靠扁钢屈服后塑性变形耗能,有效阻止了结构榫卯节点的破坏.从而验证了榫卯连接的扁钢加固方案是可行的,可为古建筑木结构抗震加固提供一种方法.A model was set up according to the actual historical timber building with a scale of 1/3.52 of the prototype structure whose mortise-tenon joints had been consolidated or not.The shaking table experiments were carried out.The dynamic characteristics and the change rules of frequency and damping ratio were tested,and seismic responses of the model were obtained.By comparing and analyzing the characteristics,it is shown that the stiffness change of the strengthened mortise-tenon joint model is consistent the primary model on the whole while the stiffness is increased little. At the same time, the energy dissipation depends on the yield plastic deformation of the armor plate instead of the structure collapse with mortise - tenon. The consolidation scheme is proved to be a useful method for repairing and reinforcing the historical timber buildings.

关 键 词：古建筑木结构 振动台试验 抗震加固 榫卯 动力反应 

分 类 号：TU36[建筑科学—结构工程] TU317