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通过尝试将ECC替换HRB500高强钢筋混凝土梁的受拉区来弥补高强钢筋混凝土梁结构中受拉区裂缝过宽和高强钢筋应力得不到充分发挥的不足,进行了两组共5根梁试件的正截面受弯承载力试验,发现ECC的加入确实能够改善以上缺点,且ECC对叠合梁的受弯承载力和弯曲韧性的影响受尺寸效应的影响。用ABAQUS软件,在第二组试验的基础上,模拟了6根梁试件的正截面受弯破坏试验。通过对提取的应变、应力分析,结合经济性原则,最后认为ECC的适宜浇筑高度在1/4H左右。
By replacing the tension zone of HRB500 high strength reinforced concrete beam with ECC to make up for the insufficient cracks in the tension zone and the stress of high strength steel in high strength reinforced concrete beam structure, two groups of five beam specimens It is found that the addition of ECC can indeed improve the above shortcomings. The influence of ECC on the flexural capacity and flexural toughness of composite beams is affected by the size effect. Using ABAQUS software, based on the second group of tests, the bending damage test of the positive section of six beams was simulated. Through the extraction of the strain, stress analysis, combined with the principle of economy, and finally believe that the appropriate pouring height ECC about 1 / 4H.