双筋矩形RC梁配筋设计影响因素及变化规律研究

Study on Influencing Factors and Change Laws of Reinforcement Design of Double-ribbed Rectangular RC Beams

依据钢筋混凝土双筋矩形梁正截面受弯承载力计算原理与方法,介绍了双筋矩形RC梁两侧钢筋均未知时配筋设计的计算方法以及适用条件,进一步阐述了影响配筋设计的主要因素有:构件的截面尺寸、材料的强度等级以及构件的受力。通过工程实例对配筋设计的计算方法及各影响因素下配筋面积的变化规律,进行逐一研究。研究结果表明:配筋设计采用近似计算与真实计算的方法,所得结果较为一致;梁截面高度、钢筋及混凝土强度等级、构件上作用弯矩的大小变化,都将引起配筋面积发生改变,且变化趋势及变化幅度不同;当影响因素取值在一定范围内时,对受压区配筋面积无影响,对受拉区配筋面积影响较大。

Based on the calculation principle and method of the flexural capacity of the reinforced concrete double-ribbed rectangular beam,the calculation method and applicable conditions of the reinforcement design on both sides of the double-ribbed rectangular RC beam are introduced,and the influence reinforcement design is further elaborated.The main factors are:the cross-sectional dimension of the component,the strength grade of the material,and the force of the component.Through the engineering example,the calculation method of the reinforcement design and the variation law of the reinforcement area under each influencing factor are studied one by one.The research results show that the reinforcement design adopts the method of approximate calculation and real calculation,and the results are more consistent;the height of the beam section,the strength grade of steel and concrete,and the change of the bending moment of the component will cause the reinforcement area to change,and the trend of change and the range of change are different;when the value of the influencing factor is within a certain range,there is no influence on the area of reinforcement in the compression zone,and the area of reinforcement in the tension zone is greatly affected.