本文着重介绍了高温气冷堆结构中的力学问题。由于高温气冷堆采用石墨作为主要结构材料,因而在高温、高辐照以及氧化气氛中石墨力学特性的研究是本文介绍的重点:诸如石墨在上述工作环境下的物理性质及力学性质,石墨的疲劳特性、石墨的应力分类及破坏准则等。对高温气冷堆压力容器(PCPV)应力分析中混凝土的徐变及开裂问题的研究,本文也做了介绍。 This article highlights the mechanics issues in HTR structures. Because high temperature gas cooled reactor uses graphite as the main structural material, the research on mechanical properties of graphite in high temperature, high irradiance and oxidizing atmosphere is the focus of this article: such as the physical and mechanical properties of graphite in the above working environment, the fatigue properties of graphite , Graphite stress classification and failure criteria. This paper also introduces the concrete creep and cracking in the stress analysis of high temperature gas cooled reactor (PCPV).