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Modular construction mechanics of a European pressurized reactor steel containment liner

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2017年第6期18卷 467-486页

作者： Jia-chuan YAN Xiao-fei JIN Feng QIN Zheng LI Feng FAN Jin-ping OU Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 China School of Civil Engineering Harbin Institute of Technology Harbin 150090 China China construction First Engineering Division Corporation Limited Beijing 101300 China Country Garden Foshan 528312 China China construction Second Engineering Bureau Nuclear Power Plants Branch Shenzhen 518034 China

A European pressurized reactor （EPR） steel containment liner structure is comprised of the cylinder part and the dome part. An introduction of the steel liner structure is presented, followed by studies on the key mechanical features of the construction process using a refined finite element method. The steel liner was divided into several modules and then assembled during construction. Firstly, the equipment structure used to hoist the liner module was optimized, the lifting lug was analyzed using a multi-scale finite element model; the wind speed limit during lifting was also studied. Subsequently, the effect of internal forces during assembly between the liner modules, the lateral pressure of fresh concrete, the non-uniform temperature load, and the wind load on the cylinder module was analyzed. According to the time-varying structural performance during continuous concrete pouring and the hardening construction, an ＂overlapping element and birth-death element＂ technique was adopted to analyze the deformation and stress of the long-span steel dome liner. In addition, the stability-bearing capacities of the dome structure during construction were also studied, which took into consideration the effect of the initial geometrical imperfections and the elasto-plasticity of the material. This study presents a reference in terms of the mechanics of the construction scheme and the safety of such a type of structure.

关键词： Containment construction mechanics Steel liner Overlapping element Birth-death element

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Model Test for Dynamic construction Mechanical Effect of Large-Span Loess Tunnel

引用

Journal of Shanghai Jiaotong university(Science) 2011年第1期16卷 112-117页

作者：何本国朱永全叶朝良张志强 School of Civil Engineering Southwest Jiaotong University School of Civil Engineering Shijiazhuang Tiedao University

It has been a focus of debate for a large time on construction methods for large-span loess *** construction method has much effect on stability of tunnel and construction *** and failure of surrounding rock are quite *** with the large-span loess tunnel of Zhengzhou- Xi'an high-speed passenger rail line in China,large scale model test with geometric proportion 1:20 is applied to study on dynamic mechanical behavior of various construction *** include full-face excavation with support and no support,and benching method with *** is found that pre-deformation and stress accumulation take place ahead of working *** effects of three construction methods are further studied,particularly in terms of tunnel displacement and stress *** is revealed that benching method transfers load to an unexcavated area,limits horizontal deformation,reduces stress concentration effectively,lengthens the distance between location of peak for stress concentration and working face,and consequently increases *** model test results not only supply theoretical foundation for determination of reasonable construction method,but also can act as reference for similar tunnel and underground engineering construction.

关键词： physical model construction method loess tunnel construction mechanics stability

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