一、基本假定美国ACI规范关于受弯构件正截面强度计算的基本假定与我国新修订的《混凝土结构设计规范》的基本假定是相同的,即: 1. 平截面假定,应变沿截面高度呈线性变化; 2. 混凝土开裂前,钢筋应变与其周围 I. Basic assumptions The basic assumptions for the calculation of the normal section strength of the flexural members of the United States ACI Code are the same as the basic assumptions of the newly revised “Code for the Design of Concrete Structures” in China, namely: 1. The flat section assumes that the strain is linear along the height of the section. Change; 2. Before the concrete cracks, the strain of the reinforcement and its surroundings