Simulation analysis method for temperature stress of mass concrete in raft foundations of nuclear island of nuclear power station

Abstract

The invention discloses a simulation analysis method for temperature stress of mass concrete in raft foundations of a nuclear island of a nuclear power station. The method is capable of calculating the optional position of the raft foundations of the nuclear island, temperature stress at any time of simulation time in order to form a temperature cloud picture and a main stress cloud picture so that temperature control over mass concrete in raft foundations of the nuclear island during the whole pouring process is conveniently carried out and temperature control construction measurements after pouring can be made, and occurrences of harmful cracks can be effectively controlled in order to ensure construction quality of the raft foundations of the nuclear island. The method is capable of simulating the construction process of the mass concrete in the raft foundations of the nuclear island and extracting video-based animation of hydration heat for mass concrete in the raft foundations of the nuclear island in an analysis result such that engineering technicians can directly know changing conditions of temperature stress of the raft foundations of the nuclear island at different phases.During calculations, few intermediate parameters are for temperature stress and calculation workload of temperature stress for the raft foundations of the nuclear island is reduced and the calculation process is simplified. The simulation analysis method is used very conveniently.

Description

technical field [0001] The invention relates to the technical field of nuclear power engineering simulation, in particular to a simulation analysis method for temperature and stress of large-volume concrete of a nuclear island raft foundation of a nuclear power plant. Background technique [0002] As the third-generation mega-kilowatt nuclear power brand, "Hualong One" has adopted effective passive safety measures on the basis of active safety, taking into account the maturity of active and the advantages of passive, and is currently the world's largest nuclear power market. One of the most accepted nuclear power models. [0003] Nuclear power is a safe, clean and economical form of energy, and nuclear safety is the focus of the government and the public. Most of the buildings and structures of the "Hualong One" nuclear power project are reinforced concrete structures, and many of them are large-volume concrete structures. Therefore, ensuring the construction quality of ma...

AI Technical Summary

Problems solved by technology

[0008] 1. The calculation process involves many calculation links such as the adiabatic temperature rise of the nuclear island raft foundation concrete, the equivalent temperature of the concrete shrinkage value, the elastic modulus of the concrete, the temperature rise estimation, the temperature difference calculation, and the temperature stress calculation. heavy workload;

[0009] 2. During the calculation, temperature and stress are usually calculated at several key points on the mass concrete of the nuclear island raft foundation, which cannot fully reflect the distribution of temperature and stress at all parts of the entire nuclear island raft base plate;

[0010] 3. For the nuclear island raft foundation with complex geometry, the position of the key points used to calculate the temperature stress cannot be accurately determined, and it is easy to cause a large deviation between the calculation result and the actual situation when calculating the temperature stress

[0011] 4. It is not conducive for engineering and technical personnel to intuitively judge whether the temperature stress of each part of the nuclear island raft foundation at different times reaches the tensile strength of the concrete, so it cannot effectively judge the location of the cracks in the nuclear island raft foundation

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