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文章通过不锈钢筋混凝土梁与普通钢筋混凝土梁抗弯、抗剪承载力对比试验,比较了两者的破坏过程和各阶段截面变形规律。不锈钢筋混凝土梁在弹性阶段、开裂阶段、破坏阶段的变形与普通钢筋混凝土梁相似;在弹性阶段和开裂初始阶段,跨中截面应变沿高度近似呈直线分布,与平截面假定基本吻合;但接近破坏荷载时,跨中截面应变沿高度分布平截面假定有一定差别;不锈钢筋混凝土梁、普通钢筋混凝土梁开裂弯矩、极限弯矩的实测值与理论值之比没有明显差别,但不锈钢筋混凝土梁实测极限剪力明显高于普通钢筋混凝土梁。鉴于当前不锈钢筋混凝土梁试验资料较少,现行规范计算结果又偏于保守,可暂按《混凝土结构设计规范(GB50010-2010)》进行计算分析,指导不锈钢筋混凝土结构的设计及施工。
In this paper, by comparing the flexural and shear strength tests of stainless steel reinforced concrete beams and common reinforced concrete beams, the failure process and the deformation rules of the sections at different stages are compared. The deformation of the stainless steel reinforced concrete beam in the elastic phase, the cracking phase and the failure phase is similar to that of the ordinary reinforced concrete beam. In the initial stage of the elastic phase and initial cracking, the strain-span height of the mid-section is almost linearly distributed, There is a certain difference between the assumption of the cross-section strain and the height distribution of the cross-section when the load is damaged. The measured values of the ultimate bending moment and the bending moment of the stainless steel reinforced concrete beam and the ordinary reinforced concrete beam have no significant difference, but the ratio of the stainless steel reinforced concrete The measured ultimate shear strength of beam is obviously higher than ordinary reinforced concrete beam. In view of the current stainless steel reinforced concrete beams less experimental data, the results of the current norms conservative and conservative, but temporarily according to the “Code for Design of Concrete Structures (GB50010-2010)” calculation and analysis to guide the design and construction of stainless steel reinforced concrete structures.