摘要
“柱强于梁”、“梁强于柱”和“梁柱等强”的3种情况在单层预应力框架或多层预应力框架的顶层中是可能出现的.通过4榀预应力混凝土框架在竖向荷载下的试验,对三类预应力混凝土框架的极限荷载、正常使用下的变形、位移延性、塑性内力重分布进行了研究.试验分析结果证明,当截面相对受压区高度较小时,这三类预应力框架均能实现完全的塑性内力重分布,具有较好的位移延性,在正常使用荷载下裂缝宽度和挠度均能满足混凝土结构设计规范的要求.
＂Strong column with weak beam＂,＂strong beam with weak column＂ and＂ column ＆ beam with equal strength＂ can be existed in one-storey prestressed concrete frames and the top storey of muir-storey prestressed concrete frames. Through the test of four prestressed concrete frames under vertical load, three kinds of prestressed concrete frames performances are studied, such as ultimate load, deflection, displacement ductility, redistribution of internal force. When the relative height of equivalent compression zone is smaller enough, the test proves that three kinds of prestressed concrete frames can realize full redistribution of internal force and have better displacement ductility, the width of cracks and deflections can satisfy the rules of code for design of concrete structures.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第10期86-90,共5页
Journal of Chongqing University
基金
重庆市自然科学基金资助项目(CSTC
2004BB0058)
关键词
预应力混凝土框架
塑性机构控制
内力重分布
位移延性
次弯矩
prestressed concrete frame
plastic machanism control
redistribution of internal force
displacement ductility
secondary moment
