一、钢筋与混凝土联合受力的关系式 在钢筋混凝土内分别埋设钢筋计、应变计及无应力计,根据仪器的构造原理和在混凝土中的工作性能,并满足钢筋与混凝土变形相容条件下,考虑钢筋为弹性体,混凝土为弹性徐变体,和钢筋与混凝土线膨胀系数不一致,以及混凝土自生体积变形,湿度变形的影响,推导出钢筋与混凝土联合受力时的关系式为: First, the relationship between steel and concrete joint force Reinforced concrete planters were laid, strain gauges and stress-free meters, according to the construction principle of the instrument and the work performance in concrete, and to meet the conditions of steel and concrete deformation compatible Considering the influence of steel bar as elastic body, concrete as elastic creep body, inconsistency of linear expansion coefficient between steel bar and concrete, as well as the influence of autogenous volume deformation and humidity deformation of concrete, the relation between rebar and concrete is deduced as follows: