AP1000结构模块墙支架连接设计优化研究

Research on the improvement design for the attachment of supports to AP1000 module wall

核岛厂房的一大特点是模块化设计,以钢板-混凝土模块墙结构取代传统的钢筋混凝土结构。正常情况下,模块墙上需要布置大量的OLP型预埋件以连接其它结构构件,如支撑工艺管道、设备、操作平台等。而对于承受较小荷载的支架,采用OLP型预埋件时,安全裕度过大。为优化设计和简化施工,提出将支架直接焊接到模块墙上,通过计算分析验证其可行性,并给出支架许用荷载值的判断公式,该方法优化了支架设计方法,充分发挥了材料的强度,具有较强的工程应用价值。

Background： Modularization is one of the main characteristics for AP 1000 nuclear power plant building. The steel-concrete-steel module wall is used instead of reinforced concrete structure wall. Usually, lots of Overlay Plate Embedments will be installed on the module wall to connect and fasten other structures, such as pipes, equipments and operation platforms. As for many supports taking less design loads, the safety margin is too big when using OLP embedment. Purpose： An improvement design will make sense that the supports with less deisn loads can be welded directly to the module wall instead of embedments. Methods： A finite element analysis based on nuclear-related concrete code is carried out. Results： Through analysis, the equations for the allowable design loads of supports to be welded directly to module wall are provided in this paper. Conclusions： The improvement design is proved feasible. In this way, the strength for steel face plate and studs will be utilized fully and this method will facilitate and simplify the design and construction with considerable engineering application value.