核电厂钢筋混凝土墙平面内抗剪设计方法研究
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摘要
针对核电厂钢筋混凝土墙平面内抗剪设计配筋量较大的问题,对钢筋混凝土墙平面内抗剪设计方法进行了研究;提出了基于单元静力平衡公式的配筋计算方法及基于优化分析的配筋计算方法。研究表明,核电厂混凝土规范给出的平面内抗剪计算公式计算得出的一个单元配筋量是最小的,当钢筋混凝土墙有限元分析划分为多个单元时,按规范公式计算不能得到最经济的配筋;对于有限元分析划分为多个单元的钢筋混凝土墙,一个方向配筋按规范公式计算而另一个方向配筋按单元静力平衡公式计算时,总配筋量小于两个方向都按规范公式计算的情况;如果墙配筋全部单元按静力平衡公式优化计算,总配筋量可进一步减小。
With the concern of over-mount percentage of reinforcement in reinforced concrete of the nuclear power plant,the method of in-plane shear resistance of reinforced concrete walls of nuclear power plant was studied,and the reinforcement calculation method based on the unit static balance formula was proposed as well as the reinforcement calculation method based on optimization analyses. The research shows that the in-plane shear resistance calculation formula given by the nuclear power plant concrete specification is the smallest for a unit of reinforcement. If the finite element analysis of a reinforced concrete wall is divided into multiple units,the most economical reinforcement cannot be obtained according to the specification formula. For reinforced concrete walls divided into multiple units by finite element analysis,one condition is that one direction of reinforcement is calculated according to the normative formula, and the other direction of reinforcement is calculated according to the unit static balance formula. In this condition,the total amount of reinforcement is less than that in the condition where both of two directions of reinforcement are calculated according to the specification formula. If all elements of wall reinforcement are calculated according to the static balance formula,the total amount of reinforcement can be further reduced.
With the concern of over-mount percentage of reinforcement in reinforced concrete of the nuclear power plant,the method of in-plane shear resistance of reinforced concrete walls of nuclear power plant was studied,and the reinforcement calculation method based on the unit static balance formula was proposed as well as the reinforcement calculation method based on optimization analyses. The research shows that the in-plane shear resistance calculation formula given by the nuclear power plant concrete specification is the smallest for a unit of reinforcement. If the finite element analysis of a reinforced concrete wall is divided into multiple units,the most economical reinforcement cannot be obtained according to the specification formula. For reinforced concrete walls divided into multiple units by finite element analysis,one condition is that one direction of reinforcement is calculated according to the normative formula, and the other direction of reinforcement is calculated according to the unit static balance formula. In this condition,the total amount of reinforcement is less than that in the condition where both of two directions of reinforcement are calculated according to the specification formula. If all elements of wall reinforcement are calculated according to the static balance formula,the total amount of reinforcement can be further reduced.
引文
[1]压水堆核电厂核安全有关的混凝土结构设计要求:NB/T 20012—2010[S].北京:原子能出版社,2010.
[2]压水堆核电厂预应力混凝土安全壳设计规范:NB/T20303—2014[S].北京:原子能出版社,2014.
[3]Rules for construction nuclear facility componentsⅢ,code for concrete containments division 2:ACI 359-13[S].New York:The American Society of Mechanical Engineers,2013.
[4]贡金鑫,孙运轮,张乃龙.基于塑性极限理论的核电厂钢筋混凝土墙平面内抗剪研究[J].建筑结构,2018,48(16):44-50.
[5]张乃龙,孙运轮,贡金鑫.基于修正压力场理论的钢筋混凝土单元平面内受剪分析[J].建筑结构,2018,48(16):51-60.
[2]压水堆核电厂预应力混凝土安全壳设计规范:NB/T20303—2014[S].北京:原子能出版社,2014.
[3]Rules for construction nuclear facility componentsⅢ,code for concrete containments division 2:ACI 359-13[S].New York:The American Society of Mechanical Engineers,2013.
[4]贡金鑫,孙运轮,张乃龙.基于塑性极限理论的核电厂钢筋混凝土墙平面内抗剪研究[J].建筑结构,2018,48(16):44-50.
[5]张乃龙,孙运轮,贡金鑫.基于修正压力场理论的钢筋混凝土单元平面内受剪分析[J].建筑结构,2018,48(16):51-60.