木结构销类连接的屈服点和延性定义方法比较  

Comparison of Definition Methods of Ductility and Yield Point of Dowel-type Connection of Timber Structure

作　　者：刘慧芬[1] 何敏娟[1] 高承勇[2] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]上海现代建筑设计(集团)有限公司,200092

出　　处：《特种结构》2015年第3期1-5,106,共6页Special Structures

摘　　要：在抗震设计中,结构的延性是和强度同样重要的指标,常用延性系数表示。而屈服点的合理选择是正确计算延性系数的前提。一般屈服点可以通过破坏试验的荷载~位移曲线得到,但木结构销类连接节点的荷载~位移曲线常常表现出高度的非线性,因此其屈服点难以明确界定。随着对木结构抗震设计的重视,国外学者提出了多种定义木结构销类连接屈服点的方法,但是目前尚无统一的标准方法。本文介绍了Offset法、Y＆K法、CEN法、CSIRO法和K＆C法等五种常用的木结构销类连接屈服点的定义方法,根据其原理对上述方法进行了分类,并结合钢填板木构件普通螺栓梁柱节点和自攻螺钉加强梁柱节点的单调加载试验,对上述方法进行了对比分析,以期为木结构销类连接屈服点的定义提供一定的参考借鉴。The ductility of structure is as important as the strength in the seismic design,and usually represented by ductility ratio.In order to obtain the ductility precisely,the yield point must be defined exactly.Generally,the yield point can be obtained by the load-displacement curve of the destructive test.But for the doweltype connection of timber structure,it is difficult to define the yield point exactly because of the high nonlinearity of load-displacement curve.With more and more researchers pay attention to the seismic design of timber structure,several methods to define yield point have been proposed overseas,but there is no standard definition approach.In this paper,five main definition methods including Offset method,Y＆K method,CEN method,CSIRO method and K＆C method are introduced,and compared in detail via test load-deformation curves of un-reinforced timber-steeltimber bolted connections and reinforced connections.And the applicability of these methods is analyzed,hoping to supply some recommendations for the definition of yield point of dowel-type connection of timber structure.

关 键 词：木结构 销类连接 屈服点 延性 

分 类 号：TU366.2[建筑科学—结构工程] TU352.11