带消能节点的梁柱式木结构民宅的抗震性能  

Seismic performance of frame wooden structure with energy dissipation joints

作　　者：周爱萍[1] 黄东升[1] 

机构地区：[1]南京林业大学土木工程学院,江苏南京210037

出　　处：《江苏大学学报（自然科学版）》2013年第1期81-85,共5页Journal of Jiangsu University：Natural Science Edition

基　　金："十二五"国家科技支撑计划项目(2011BAJ08B04)

摘　　要：以Q235钢制作的消能节点,将规格木材组合成的梁、柱连接成具有较大抗侧刚度的延性框架体系.该结构不使用我国传统木结构的榫卯连接,节点不削弱木构件,故具有更高的承载力;不需要北美轻型木结构体系中的墙体提供抗侧刚度,因而结构布置灵活,且节省材料.对采用该节点的木框架结构示范工程进行了结构分析和足尺节点的拟静力试验.结果表明:节点通过钢板的塑性变形消耗能量,具有良好的耗能能力;在考虑频遇地震作用参与的荷载标准组合作用时,结构的变形能满足现行建筑抗震设计规范的相关要求;在罕遇地震作用时,框架的弹塑性变形集中在消能节点上,层间相对弹塑性角位移小于1/50,达到我国现行规范抗震设防的目标.The wood beams and columns were connected into moment frame system with large lateral stiff- ness and ductility by the energy dissipation joints of Q235 steel. Compared to traditional Chinese wooden structures, the proposed structure has higher loading capacity because no mortise-tenon connection is needed to joint columns and beams without weakened section of wooden members. Compared to the timber structures commonly used in North America, the buildings with the proposed structure are easier to be partitioned and are more economical without wooden shear wall to offer lateral stiffness. The structural a- nalysis of a demo house with the system and the pseudo-static experiments for full scale joints were conducted. The results show that the joints have good capability to consume input energy by steel plastic deformation. The structure deflection can fulfill the requirements of the current code for seismic building design when the normal load combinations with frequency earthquake action were taken into account. Subjected to rare earthquake action, the plastic structure deformations are restricted in the joints with story drift less than 1/50 which is the criteria requirement of the code. The wooden frame with energy dissipation joints can meet the seismic fortification criterion of Chinese code.

关 键 词：木框架结构 消能节点 装配式木结构 拟静力试验 结构抗震 

分 类 号：TU375[建筑科学—结构工程]