偏压作用下钢骨混凝土桥墩斜截面抗剪承载力研究  

Research of Shear Capacity of SRC Piers under Eccentric Compression

作　　者：高闵 张南[1] 李界全 

机构地区：[1]南京工业大学土木工程学院,江苏南京211800

出　　处：《公路工程》2018年第1期30-35,65,共7页Highway Engineering

基　　金：国家自然科学基金资助(51278243)

摘　　要：为了探索不同偏心距的竖向压力对钢骨混凝土桥墩斜截面抗剪承载力的影响,进行了3根钢骨混凝土桥墩在偏压作用下斜截面抗剪试验。试验研究结果表明:偏心压力对钢骨混凝土桥墩的抗剪承载力有一定的影响,随着偏心距的增大,桥墩斜截面抗剪承载力有所降低。而现有规范在桥墩抗剪承载力的计算中并没有考虑偏压对桥墩抗剪承载力的影响。考虑了偏心压力对桥墩抗剪承载力的影响,提出了一个偏心距影响系数Ψ_e,建立了在偏心压力作用下钢骨混凝土桥墩抗剪承载力的计算公式。为钢骨混凝土桥墩在偏压作用下的斜截面抗剪承载力研究和设计提供一定参考。In order to study the influence of vertical compression loading on the shear capacity of the steel-reinforced concrete(SRC) piers under different eccentric distances,3 specimens were designed for shear test. The results show that the eccentricity has an effect on the shear capacity of the SRC piers.The increasing of the eccentric distances will cause the reduction of the shear capacity of the steel-reinforced concrete(SRC) piers. However the formula in the present code hasn' t considered the effect of the eccentricity on the shear capacity. With the effect of the eccentricity considered,this paper has proposed an eccentricity-influence coefficient Ψ_e and a formula for calculating the shear capacity of the steelreinforced concrete(SRC) piers under eccentric compression. It has provided the references for the design and research of the shear capacity of the steel-reinforced concrete(SRC) piers under eccentric compression.

关 键 词：桥梁工程 钢骨混凝土 桥墩 偏心压力 抗剪承载力 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]