用不同规范本构关系分析钢筋混凝土压弯截面  

Reinforced concrete section analysis under biaxial compression and bending with different constitutive laws

作　　者：刁波[1] 叶英华[1] 焦俊婷[1] 郝志宏[1] 

机构地区：[1]北京航空航天大学土木工程系,北京100083

出　　处：《哈尔滨工业大学学报》2005年第6期795-797,共3页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50342015).

摘　　要：建立的钢筋混凝土任意截面梁柱单元材料与几何非线性耦合分析模型,取截面作为梁柱单元积分的高斯点.为研究不同混凝土本构关系对截面分析的影响,分别用我国混凝土结构设计规范、CEB规范以及美国学者建议的混凝土本构关系,对钢筋混凝土双向弯压截面进行分析比较.截面分析表明,3种本构关系对截面极限承载力影响较小,截面弯矩曲率关系曲线的上升段基本吻合,下降段存在差异.3种本构关系的分析结果与试验结果吻合均较好.The cross-section stiffness is taken as the Gauss points of beam-column elements to derive analysis model of reinforced concrete arbitrary cross-sections beam-column element with combined geometric and material nonlinearity. Arbitrary cross-sections are analyzed with different concrete constitutive laws under the action of biaxial bending and compression. The constitutive laws come from Chinese concrete structural design code, CEB model code and American code separately. The cross-section analysis results with different constitutive laws are compared. The differences of the ultimate capacities analyzed with three constitutive laws are small. The ascendant segments of moment-curvature curve are nearly overlapped. There are some differences in the descendant segments of the curve. The analyzed ultimate capacities are all corresponding well with experimental data.

关 键 词：钢筋混凝土 本构关系 双向弯压 材料非线性 

分 类 号：TU375.1[建筑科学—结构工程]