摘要
GB50010-2010《混凝土结构设计规范》对称配筋钢筋混凝土小偏心构件的计算公式较为繁琐,对此,该文提出两种简化方法:修正直线法和简化?法。方法 1基于对小偏心Mu-Nu曲线的修正,计算配筋时无需计算混凝土受压区高度系数?;方法 2将混凝土受压区高度系数?的计算公式简化成了偏心距的一次函数,两种方法计算步骤少且公式简单方便。两种简化方法与试验数据拟合较好,计算所得的钢筋面积与理论解均较为接近,基本满足工程精度的要求,但当轴压力接近平衡轴力Nb时,计算精度稍小,配筋需做适当调整。
In current code, GB 50010-2010, the calculation formula of symmetrically reinforced concrete members under small eccentric compression is complicated and inconvenient to use. This paper presents two simplified methods： updated linear method and Simplified method of ξ. The former method is based on the modification of the small eccentric curve, and thus the calculation of compression depth is not needed; The latter method simplifies the calculation formula of compression depth into linear function with eccentricity. The calculation steps and formulas of both simplified methods are simple and practical. Experimental data are compared with the proposed formulas and good agreement is observed. The calculated reinforcement by the proposed formulas has good accuracy, meeting the requirement of engineering design. The accuracy declines when the compression N is close to the balance compression Nb, in that case, the reinforcement should be properly adjusted.
出处
《工程力学》
EI
CSCD
北大核心
2013年第12期107-114,共8页
Engineering Mechanics
基金
国家自然科学基金项目(51078132)
2009教育部创新团队项目(IRT0917)
关键词
钢筋混凝土
偏压构件
小偏心
受压区高度
简化方法
reinforced concrete
eccentric compression member
small eccentricity
depth of compression
simplified method
