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在高强混凝土结构中,配置高强箍筋可以有效地提高构件的承载力和变形性能。通过6根小剪跨比的高强箍筋高强混凝土简支梁的抗剪性能试验,研究了该类构件的破坏过程、破坏形态,分析了箍筋间距、箍筋强度以及平均约束应力等对其受剪承载力的影响。同时,结合国内外大量试验数据,将试验值与采用我国《混凝土结构设计规范》(GB 50010—2002)及日本高强箍筋钢筋混凝土设计指南中的计算值进行了对比。结果表明:高强箍筋和高强混凝土组合更加合理;当平均约束应力小于4时,高强箍筋高强混凝土梁受剪承载力可按我国现行规范公式计算;当平均约束应力大于4时,我国规范计算值偏于不安全,而日本设计指南公式计算值安全储备高,但过于保守;当混凝土等级较低时,配置高强箍筋的混凝土梁按我国现行规范公式计算安全度较低。
In high-strength concrete structures, the configuration of high-strength stirrups can effectively improve the bearing capacity and deformation performance of the components. Through the shear resistance test of six high-strength stirrup concrete beams with high shear strength, the damage process and failure mode of the members were studied. The effects of stirrup spacing, stirrup strength and average restraining stress Shear capacity. At the same time, a large number of experimental data at home and abroad are combined to compare the test values with the calculated values in China’s “Code for Design of Concrete Structures” (GB 50010-2002) and in the design guide for high-strength stirrup reinforced concrete in Japan. The results show that the combination of high-strength stirrups and high-strength concrete is more reasonable. When the average restraining stress is less than 4, the shear capacity of high-strength stirrup reinforced concrete beams can be calculated according to China’s current standard formula. When the average restraining stress is more than 4, However, the value of the safety factor is too high, but the value is too conservative. When the concrete grade is low, the concrete beams with high strength stirrups are less safe to calculate according to China’s current standard formula.