沙漠砂混凝土梁抗剪性能研究  

Study on the shear properties of desert sand concrete beams

作　　者：李志强[1,2] 杨森 曾晓云[1] 杨骏[1] Li Zhiqiang;Yang Sen;Zeng Xiaoyun;Yang Jun(College of Water&Architectural Engineering,Shihezi University,832003,Shihezi,China;Xinjiang Production&Construction Groups Engineering Laboratory for Seismic and Energy Saving Building in High Earthquake Intensity and Cold Zone,832003,Shihezi,China)

机构地区：[1]石河子大学水利建筑工程学院,石河子832003 [2]新疆兵团高烈度寒区建筑抗震节能技术工程实验室,石河子832003

出　　处：《应用力学学报》2020年第5期2134-2140,I0021,共8页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51668053)。

摘　　要：为了研究沙漠砂混凝土梁的抗剪性能,通过15根沙漠砂混凝土梁的抗剪试验,分析了剪跨比、沙漠砂替代率、配筋率、配箍率、加载方式对梁抗剪承载力的影响规律。试验结果表明:沙漠砂混凝土梁的受力破坏过程与普通混凝土梁类似,当λ≤1时,梁常发生斜压破坏;当1.5≤λ≤2.5时,梁常发生剪压破坏;当λ≥3时,梁常发生斜拉破坏;但现行规范中梁抗剪承载力公式不适用于沙漠砂混凝土梁。因此,本文通过引入混凝土抗力系数对普通混凝土梁的抗剪承载力计算公式进行修正,建立了适用于沙漠砂混凝土梁的抗剪承载力计算公式。计算结果表明本文提出的计算公式精度较高,能客观反映沙漠砂混凝土梁的抗剪性能。In order to study the shear properties of desert sand concrete beam, 15 desert sand concrete beams were tested. And the effects of shear span to depth ratio, desert sand replacement ratio, reinforcement ratio, stirrup reinforcement ratio, and loading modes on the shear properties of desert sand concrete beam are investigated. The experimental results indicate that the failure process of desert sand concrete beam was similar to that of ordinary concrete beam. When λ ≤1, the beams fail in diagonal-compression;when 1.5 ≤λ ≤2.5, the beams fail in shear compression, and when λ ≥3, the beams failed in diagonal-tension. However, the shear capacity formula in the current code is not appropriate for desert sand concrete beams. Therefore, the proposed formulas are established for desert sand concrete beam by introducing the resistance coefficient of concrete in the formula for calculating the shear capacity of ordinary concrete beams. The results show that the proposed formula is accurate and reflects the shear strength of concrete beams.

关 键 词：沙漠砂混凝土 抗剪承载力 静力试验 破坏模式 

分 类 号：TU375[建筑科学—结构工程]