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钢与混凝土联合梁除考虑恒载、外荷载以外,还要考虑混凝土徐变、收缩以及温度的影响。在钢与混凝土联合梁的强度及挠度计算中,视结构物的不同建造方法,可分一个或两个受力阶段进行,兹阐述如下。一、钢与混凝土联合梁的强度计算 (一)垂直荷载作用下的正应力计算钢与混凝土联合梁在垂直荷载作用下所产生的正应力,可按下列公式计算(公式中的符号,正号为拉应力;负号为压应力。要视联合截面中和轴位置而定)。按第一及第二两个受力阶段:
In addition to considering the dead load and external load, the steel-concrete composite beam must also consider the effects of concrete creep, shrinkage and temperature. In the calculation of the strength and deflection of a steel-concrete composite beam, depending on the method of construction of the structure, it can be performed in one or two stages of stress, which are described below. 1. Calculation of strength of steel-concrete composite beams (I) Normal stress under vertical loads The normal stress generated by a combined steel-concrete beam subjected to vertical loads can be calculated according to the following formula (the symbol in the formula, positive sign It is the tensile stress; the negative sign is the compressive stress. It depends on the position of the joint section and the neutral axis). According to the first and second force stages: