高温气冷堆核岛厂房抗震设计研究

RESEARCH ON SEISMIC DESIGN OF NUCLEAR ISLAND BUILDINGS OF HTR-PM

高温气冷堆(HTR-PM)核岛厂房采用钢筋混凝土板壳结构,抗震分类为Ⅰ类(C-I)。以核岛厂房在遭遇极限安全地震动(SL-2)(万年一遇)结构处在基本弹性状态、遭遇运行安全地震动(SL-1)(500年一遇)及其以下时结构处在安全弹性状态作为抗震性能目标。通过对剪力墙进行拟静力试验获得层间位移角限值,并以此做为结构性能控制指标;同时提出核岛厂房地震响应计算方法、钢筋混凝土板壳结构平面内承载力计算式。采用以上抗震性能目标及设计方法对核岛厂房进行了抗震设计。最后,通过振动台试验,证明采用所提的设计方法进行抗震设计的核岛厂房,其结构抗震性能良好,能够满足核安全功能要求。所提的钢筋混凝土板壳结构平面内承载力计算式已被相关标准采纳。

The nuclear island buildings of HTR-PM adopts reinforced concrete slab and shell structure. It is nuclear safety related, and the seismic classification is class I. When the nuclear power plant is subjected to the ultimate safe earthquake(SL-2)(once every 10 000 years), the structure is in the state of basic elasticity, and when it is subjected to the safe earthquake(SL-1)(once every 500 years) or below, the structure is in the state of complete elasticlity. Through the quasi-static tests of shear walls, the limit value of displacement angle was obtained and had been used as the control index of structural performance;at the same time, the calculation method of seismic response of the nuclear island buildings and the calculation formulas of in-plane bearing capacity of reinforced concrete slab shell structure were proposed. The above seismic performance objectives and design methods were adopted in the seismic design of the nuclear island buildings. Finally, through shaking table tests, it was proved that the nuclear island buildings with seismic design method proposed in this paper had good seismic performance and could meet the requirements of nuclear safety function. The calculation formulas of in-plane bearing capacity of reinforced concrete slab and shell structure proposed in this paper had been adopted by relevant standards.