Method for simulating large-volume concrete water pipe cooling temperature field
A large-volume concrete and water pipe cooling technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of low calculation efficiency and long processing time
Active Publication Date: 2016-10-12
HOHAI UNIV
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a simulation method for the cooling temperature field of large-volume concrete water pipes, and to solve the technical problems of high time-consuming pre-processing and low calculation efficiency in the solution process of the prior art
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Embodiment 1
[0064] Taking a certain gravity dam as an example, it is known that in two years, the dam section was poured upward from the foundation constraint area to the spillway, and it was poured in 86 times, each pouring block was about 1m high, and the total pouring height was 70m. The temperature field of block and middle block within two years. The calculation of the temperature field during the construction period needs to consider factors such as pouring sequence and water pipe cooling. The dam section is 21 meters wide, and the upper and middle casting blocks are 25m and 38m long. The geometric model of the dam section is as figure 2 . The thermal parameters of the concrete and the foundation are obtained through indoor tests. The adiabatic temperature rise of the concrete is 18.2°C. The rest of the parameters are shown in Table 1. The water pipes are iron pipes, which are arranged in a serpentine shape on the pouring level, and the direction of water flow is changed every t...
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The invention discloses a method for simulating a large-volume concrete water pipe cooling temperature field. The method is characterized by comprising the following steps of 1, dividing a concrete structure and a foundation grid; 2, dividing a water pipe grid; 3, creating a composite unit; 4, defining material attributes; 5, creating a water pipe number; 6, creating a cooling water information file; 7, calculating a foundation temperature field during pouring; and 8, writing a custom unit sub-program to calculate the temperature field: performing calculation by taking the foundation temperature field as an initial temperature field to obtain a temperature field in each pouring stage. According to the method, the overall cooling effect of a cooling water pipe on the large-volume concrete structure can be effectively simulated and the gradient change of the temperature field around the water pipe can be reflected; and water pipe arrangement does not need to be considered during grid division, the node temperature of the water pipe can be obtained while the node temperature of concrete is solved, and an extra iterative step does not need to be added for solving the water pipe temperature during calculation, so that the method has very high preprocessing efficiency and calculation efficiency.
Description
technical field [0001] The invention relates to a method for simulating a temperature field, in particular to an ABAQUS-based method for simulating a large-volume concrete water pipe cooling temperature field, and belongs to the technical field of building structure analysis. Background technique [0002] Temperature stress has an important impact on the early safety of mass concrete, and is one of the main causes of early cracks in mass concrete structures. Arranging cooling water pipes in the mass concrete structure can effectively reduce the temperature rise of the concrete structure, thereby reducing the temperature stress. In engineering calculations, the finite element method is generally used to simulate the early temperature stress field of concrete structures. However, accurately simulating the temperature stress field of a mass concrete structure including cooling water pipes using the finite element method is a very complicated task with many difficulties. First...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/23G06F2119/08
Inventor 董义佳苏超徐超任志明
Owner HOHAI UNIV