Method for calculating mass concrete water pipe cooling temperature field

A large-volume concrete and cooling temperature technology, which is applied in the processing of building materials, construction, building construction, etc., can solve the problems of complex pre-processing and affecting calculation speed, and achieve the effect of simple pre-processing and fast calculation speed

Active Publication Date: 2011-07-27
HOHAI UNIV
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Problems solved by technology

Its disadvantage is that it can only directly calculate the water temperature along the way of the iron pipe. For the water temperature along the way

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  • Method for calculating mass concrete water pipe cooling temperature field
  • Method for calculating mass concrete water pipe cooling temperature field
  • Method for calculating mass concrete water pipe cooling temperature field

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[0035] Specific implementation plan

[0036] The implementation of the technical solution will be further described in detail below in conjunction with the drawings.

[0037] 1. The concept of generalized water pipe nodes:

[0038] Such as figure 1 As shown, the water pipes in the concrete generally use serpentine pipe loops, the vertical spacing of the water pipes is generally equal to the thickness of the pouring layer, and the horizontal spacing is generally 1.5m~3.0m. When calculating with finite element, the calculation area must be meshed first, that is, the calculation model is established. The diameter of the cooling water pipe in large-volume concrete is about 32mm. Compared with the influence area of ​​the water pipe, its volume is negligible and can be regarded as a line in the concrete, which will not greatly affect the accuracy of the calculation result. The nodes in the concrete through which the cooling water pipes pass are defined as generalized water pipe nodes. T...

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Abstract

The invention provides a method for calculating a mass concrete water pipe cooling temperature field. The method comprises the following steps of: first, giving an initial temperature field of concrete, and determining whether a cooling water pipe supplies water or not, calculating directly if the cooling water pipe does not supply water, otherwise performing the following steps: calculating on-way water temperature of the cooling water pipe in the concrete, taking a generalized water pipe node as a common node to synthesize an integral matrix according to the traditional method, adding a formed matrix into the integral matrix, and solving to acquire the concrete water pipe cooling temperature field in the next time step. By adopting the method, water pipe information is concealed in a node of an existing unit, so that the pre-processing workload is reduced; a finite element calculation format and a water pipe on-way water temperature calculation formula of the water pipe cooling temperature field are established, no iteration is required in the calculating process, so that the solving speed is ensured, and temperature changes close to the water pipe can be reflected.

Description

technical field [0001] The invention relates to a method for calculating the cooling temperature field of a large-volume concrete water pipe, and belongs to the technical field of large-volume concrete construction. Background technique [0002] In the construction of mass concrete, the temperature of the early concrete will increase due to the heat release of cement hydration. Can produce the stress of drawing inside the concrete during the cooling stage. In order to control the temperature stress in concrete, cooling water pipes are often buried in mass concrete construction projects to cool down through water. Temperature control is an important measure in the construction process of mass concrete. The difficulty in calculating the water pipe cooling temperature field is that there are many water pipes inside the concrete. If each water pipe is discretized, the number of units in the model will increase dramatically. At the same time, the water temperature in the water...

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Application Information

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IPC IPC(8): E04G21/02
Inventor 朱优平李同春刘晓青赵兰浩牛志伟程井
Owner HOHAI UNIV
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