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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2009, Vol. 28 ›› Issue (3): 501-504.DOI: 10.3969/j.issn.1674-0696.2009.03.07

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轴压力对钢筋混凝土悬臂柱水平侧移的影响

张明1,邓蕾蕾2,李华2,沈蒲生1   

  1. 1.湖南大学土木工程学院,湖南长沙410082;2.中国市政工程西南设计研究院,四川成都610081
  • 收稿日期:2008-11-26 修回日期:2009-03-16 出版日期:2009-06-15 发布日期:2015-04-15
  • 作者简介:张明(1964—),男,浙江诸暨人,教授级高工,博士研究生,从事混凝土结构基本理论及高层建筑结构分析与设 计研究。Email:menghuanling@163.com。
  • 基金资助:
    国家自然科学基金项目( 50378035)

Effect?of?Axial?Pressure?Force?on?Horizontal??Displacement?of?Cantilever?Column

ZHANG Ming1, DENG Lei-lei2, LIHua2, SHEN Pu-sheng1   

  1. 1.?School?of?Civil?Engineering,?Hunan?University,?Hunan?Changsha?410082,?China;?Southwest?Municipal?Engineering?Design?＆?Research?Institute?of?China,?Sichuan?Chengdu?610081,?China
  • Received:2008-11-26 Revised:2009-03-16 Online:2009-06-15 Published:2015-04-15

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摘要： 根据现行规范给出的预应力混凝土受弯构件短期刚度公式和普通受弯构件短期刚度公式,推导出了有轴力 作用下和无轴力作用下的悬臂柱开裂弯矩、开裂前截面刚度和开裂后截面刚度的计算公式;在对钢筋弹性模量与 混凝土弹性模量比、截面配筋率、截面有效高度和整截面高度比以及轴力大小等可影响轴力作用的一些参数因素 进行分析的同时,得到这些因素对轴力作用的影响程度以及各因素间互相作用或制约的影响关系等定性规律。最 后,通过悬臂柱的算例可发现,有些情况下,轴力对构件或结构的侧移可产生明显的有利影响。

关键词: 轴压力, 水平侧移, 悬臂柱, 截面刚度

Abstract: On?the?basis?of?the?short-term?stiffness?formulas?provided?by?the?current?concrete?cedes?for?prestressed?flexural?member?and?normal?flexural?member,?the?formulas?of?cracking?moment,?pre-cracking?section?stiffness?and?post-cracking?section?stiffness?for?the?horizontal?displacement?calculation?of?cantilever?column?which?under?axial?force?action?and?without?axial?force?action?are?deduced.?Some?parameter?factors?which?having?effect?on?the?axial?force?action?are?analyzed,?such?as?the?elastic?modulus?ratio?of?reinforcement?and?concrete,?the?ratio?of?reinforcement,?the?ratio?of?sectional?effective?height?to?sectional?height,?and?the?axial?force?values,?then?some?qualitative?regularities?about?the?impact?of?foregoing?parameters,?the?interaction?relationship?between?foregoing?parameters?and?axial?force?action?are?obtained?at?the?same?time.?Finally,?the?resuits?of?cantilever?columns?show?that?axial?force?has?a?beneficial?impact?on?the?displacement?of?structure?or?member?in?some?cases.

Key words: axial pressure force , horizontal displacement , cantilever column , section stiffness ;

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