混凝土后锚固群锚中心抗剪性能研究综述  

A Review on Concentric Shear Behavior of Concrete Post-Installed Anchorage Group

作　　者：曹立金[1] 陆洲导[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《结构工程师》2008年第6期144-149,共6页Structural Engineers

摘　　要：后锚固技术在建筑结构加固改造中的应用越来越广泛。在总结国内外研究成果的基础上,首先给出了混凝土中单个锚栓的剪力-变形关系,阐述了后锚固群锚定义、群锚受剪内力计算方法、承载力影响因素。根据未开裂混凝土中群锚破坏模式,包括钢材破坏,边缘混凝土楔形体破坏、混凝土-钢材复合破坏和剪撬破坏,以双锚和四锚为例,讨论了后锚固群锚每种破坏模式的受剪承载力计算方法。Post-installed anchors are widely used in structural strengthening and rehabilitation. Based on the research and experimental data at home and abroad, the load-deformation curve of single post-installed anchor in concrete is described firstly. Then the definition of anchorage group, the distribution of shear load and the factors that influence the shear capacity of the group are presented. The failure modes of anchorage group in non-cracked concrete are provided, including steel failure, concrete edge failure, concrete and steel failure, pryout failure. Based on examples of two-blot and four-blot anchorage group, corresponding methods to predict the ultimate shearing capacity of each failure mode are discussed.

关 键 词：后锚固 锚栓 群锚 抗剪承载力 破坏模式 混凝土 

分 类 号：TU375[建筑科学—结构工程]