钢筋混凝土梁中劈裂粘结破坏及钢筋延伸长度的试验研究  

EXPERIMENTAL STUDY ON SPLITTING BOND FAILURE AND DEVELOPMENT LENGTH OF REINFORCING BARS IN REINFORCED CONCRETE BEAMS

作　　者：滕智明 张合贵 

机构地区：[1]清华大学 [2]北方交通大学

出　　处：《土木工程学报》1989年第2期33-43,共11页China Civil Engineering Journal

摘　　要：本文通过34个外伸梁试验,研究了钢筋在反弯点区段的锚固性能。对粘结破坏特征、破坏机理及其影响因素进行了分析。提出的粘结强度计算公式与国外试验结果作了对比,符合较好。文中还给出了延伸长度计算公式。本研究成果为《混凝土结构设计规范》的修订提供了试验依据。In this paper, the bond behavior of reinforcing bars in the region withinflexion point was investigated through 34 cantilever beam tests. Bond fai-lure characteristics and mechnism as well as their influence factors were ana-lyzed. The equations for computing ultimate bond strength were proposed andtheir computed results were compared with many test data of other investi -gators, A good agreement is found in comparison. A general form of predic-ting formula is presented for computing the development length. Theseresearch achievements provide an experimental basis for revision of ConcreteStructure Design Code.

关 键 词：钢筋混凝土 梁 粘结破坏 延伸长度 

分 类 号：TU375.1[建筑科学—结构工程]