土木工程与管理学报2011，Vol.28Issue(3)：254-258,5.
钢筋混凝土框架强柱弱梁屈服机制问题的分析
Analyses on Strong Column-weak Beam Yielding Mechanism of RC Rrame
摘要
Abstract
During existing earthquake excitations, some reinforced concrete ( RC ) moment-resisting frame systems with cast-in-place slab were very hard to realize ductile yielding mechanism with strong column-weak beam as desired at initial seismic design, and most cracks damage or plastic hinges formed at column ends rather than beam ends. Based on some research results and stipulations provided in design codes, flexural strength contribution of slab located at beam-column joint, definition of ratio about the sum of the nominal moment capacities of the columns at a joint to the sum of the moment capacities of the beams framing into that joint, influence of acting direction of lateral seismic forces, influence of dynamic variation of axial force acting on the column, and the enhanced properties of materials used are analyzed for understanding the factors that prevents a RC moment-resisting frame from forming a structural yielding mechanism. Consider the shortages of existing seismic strengthening methods, an effective means by weakening the negative flexural strength of the beam is provided, which could facilitate forming plastic hinges at beam ends and improve the ductility capacity of a RC moment-resisting frame.关键词
钢筋混凝土框架/强柱弱梁/塑性铰/楼板/延性破坏Key words
RC moment-resisting frames/ strong column-weak beam/ plastic hinge/ slab/ ductile failure分类
建筑与水利引用本文复制引用
敬登虎..钢筋混凝土框架强柱弱梁屈服机制问题的分析[J].土木工程与管理学报,2011,28(3):254-258,5.基金项目
国家自然科学基金(51008070) （51008070）
