（1 上海核工程研究设计院， 上海 200233； 2 同济大学预应力研究所， 上海 200092; 3 同济大学先进土木工程材料教育部重点实验室， 上海 200092）

［摘要］利用ABAQUS有限元软件，应用塑性损伤混凝土模型和考虑屈服后强度的多段线钢质材料模型，对闸门洞口、加腋区和扶壁等几何非线性因素和预应力筋、普通钢筋和钢衬里在不同区域的差异性进行了精细化建模，对预应力安全壳结构在超设计基准压力下的力学性能进行了数值研究，并给出了各项指标随压力增长的发展规律，以期为预应力安全壳结构内压作用下的承载能力确定、结构设计和安全评定提供一定的指导意义。

［关键词］预应力安全壳； 超设计基准压力； 塑性损伤混凝土模型； 非线性

中图分类号：TU378-2文献标识码：A文章编号：1002-848X(2018)08-0077-06

 

Finite element research on prestressed concrete containment under inner pressure

Xue Rongjun1, Wang Hongliang1, Chu Meng1, Xiong Xueyu2,3, Luo Gang1, Ge Honghui1

(1 Shanghai Nuclear Engineering Research & Design Institute, Shanghai 200233, China; 2 Institute of Prestressed Structures, Tongji University, Shanghai 200092, China; 3 Key Laboratory of  Advanced Civil Engineering  Materials(Tongji University),Ministry of Education, Shanghai 200092, China)

Abstract:The mechanical properties of prestressed concrete containment under pressure exceeding design reference requirement were studied by the finite element software ABAQUS. Concrete damaged plasticity  model and multi-segment line constitutive model of steel considering strength in post-yielding stage were used to establish refined model considering geometric nonlinear factors of strobe holes, haunch region and buttress, as well as the differences of prestressed tendon, common reinforcement and steel backing in different regions. The development laws of all indicators along with the inner pressure increasing were obtained, which could provide some guidance for bearing capacity determination, structural design and safety assessment of prestressed concrete containment under internal pressure in the structure.

Keywords:prestressed concrete containment; pressure exceeding design reference requirement; concrete damaged plasticity model; nonlinear

 

作者简介：薛荣军，助理工程师，Email：rongjunxue@126.com。