本报告提出了一种面向设计的方法，用于考虑钢筋混凝土结构的热效应。尽管该方法旨在符合ACI 349附录E的一般规定，但并不限于核电厂结构。讨论了结构在热效应下的一般行为，以及在加固设计中需要考虑的重要问题。讨论了两种类型的结构——框架和轴对称壳。对于框架结构，描述了确定构件开裂程度的基本原理，可以假设构件开裂的程度，以获得开裂结构的热力和力矩。刚度系数和携带系数以图形形式表示，作为构件沿其长度开裂程度和配筋率的函数。裂纹部件的固定端热力矩用以下因素表示: 1） 组件深度上的温度梯度；以及2）由于沿相邻部件轴线的均匀温度变化而产生的端部位移。对于轴对称壳体，归一化裂纹截面热力矩以图形形式表示。这些力矩根据横截面尺寸和横截面上的温度梯度进行归一化。规范化力矩表示为作用在截面上的内部轴向力和力矩以及配筋率的函数。举例说明了图形信息的使用。

This report presents a design-oriented approach for considering thermal effect on reinforced concrete structures. Although the approach is intended to conform to the general provisions of Appendix E of ACI 349, it is not restricted to nuclear power plant structures. The general behavior of structures under thermal effects is discussed together with the significant issues to consider in reinforcement design. Two types of structures - frames and axisymmetric shells - are addressed. For frame structures, a rationale is described for determining the extent of component cracking that can be assumed for purposes of obtaining the cracked structure thermal forces and moments. Stiffness coefficients and carryover factors are presented in graphical form as a function of the extent of component cracking along its length and the reinforcement ratio. Fixed-end thermal moments for cracked components are expressed in terms of these factors for: 1) a temperature gradient across the depth of the component; and 2) end displacements due to a uniform temperature change along the axes of adjacent components. For the axisymmetric shells, normalized cracked section thermal moments are presented in graphical form. These moments are normalized with respect to the cross-sectional dimensions and the temperature gradient across the section. The normalized moments are presented as a function of the internal axial forces and moments acting on the section and the reinforcement ratio.Use of the graphical information is illustrated by examples.