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钢筋混凝土深梁一般是指梁的跨度与高度之比(L/H)≤2的简支梁和(L/H)≤2.5的连续梁。此类梁因其高度与跨度接近,故受力性能与一般梁有较大的差异,是现行设计规范(TJ10-74)所欠缺的内容。本专题组自1978年以来,先后进行了三百多个简支深梁的试验与分析工作。这些试验构件的参变量为: 跨高比(L/H)=1～4(大部分为1～2); 剪跨比(a/h_0)=0.2～1.9(大部分为0.5～1.0); 主筋配筋率μ=(0.14～2.85)%; 腹筋配筋率μ_f=(0～1.43)%; 混凝土标号R~S=150～440kg/cm~2。大部分施加集中荷载,小部分均布荷载。现将顶部受荷简支深梁的试验研究成果阐述如下。
Reinforced concrete deep beams are generally referred to as simply supported beams with a ratio of beam span to height (L/H) ≤ 2, and continuous beams with (L/H) ≤ 2.5. Because of the closeness of the height and span of this type of beam, there is a big difference between the performance of the beam and the general beam, which is what the current design code (TJ10-74) lacks. Since 1978, this special group has conducted more than 300 simple and deep beams of experiments and analysis. The parameters of these test components are: the ratio of height to height (L/H) = 1 to 4 (mostly 1 to 2); the shear span ratio (a/h_0) = 0.2 to 1.9 (mostly 0.5 to 1.0); The reinforcement ratio of main reinforcement μ=(0.14~2.85)%; reinforcement ratio of web reinforcement μ_f=(0~1.43)%; concrete marking R~S=150~440kg/cm~2. Most of the application of concentrated loads, a small part of the uniform load. The experimental research results of the simply supported deep beams at the top are described below.