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The method of determining the pouring temperature for finite element calculation according to the measured value of pouring temperature

A technology of pouring temperature and finite element, applied in calculation, computer-aided design, special data processing application, etc., can solve the problems of finite element analysis result error and inability to guarantee the scientific accuracy of tracking analysis, so as to improve scientific accuracy and guarantee The effect of accuracy

Active Publication Date: 2019-08-13
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0007] Therefore, directly using the pouring temperature value of the measured point as the data basis for the finite element analysis calculation will lead to errors in the finite element analysis results, and cannot guarantee the scientific accuracy of the tracking analysis

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  • The method of determining the pouring temperature for finite element calculation according to the measured value of pouring temperature
  • The method of determining the pouring temperature for finite element calculation according to the measured value of pouring temperature
  • The method of determining the pouring temperature for finite element calculation according to the measured value of pouring temperature

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Embodiment Construction

[0045] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0046] The method for determining the pouring temperature for finite element calculation according to the pouring temperature measurement value disclosed by the present invention includes:

[0047] 1. Heat of hydration temperature rise during pouring.

[0048] The equivalent hydration exotherm time is:

[0049]

[0050] Among them, T c is the initial temperature of the adiabatic temperature rise test block; T 1 It is the time interval from the end of concrete unloading and vibrating to the end of pouring of pavement layer; is the equivalent hydration exothermic time, that is, the time for the adiabatic temperature rise test; Δτ is the pavement interval time.

[0051] The temperature rise caused by the exotherm of hydration is Preferably derived directly from experimental data on the basis of using the equivalent exotherm of hydration time. ...

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Abstract

The invention discloses a method for determining the casting temperature for finite element calculation according to casting-temperature measurement values. On the basis of the actually-measured casting temperature, the hydration-heat-releasing influence factor is removed, and according to finite element data, the ratio between the paving-layer average casting-temperature increment caused by the external environment temperature and the actually-measured casting-temperature increment from spreading vibrating ending and paving-layer casting ending is fit, factors such as the placing temperature, the ratio between the paving-layer average casting-temperature increment caused by the external environment temperature and the actually-measured casting-temperature increment of actually-measured points of a paving layer from concrete spreading vibrating ending to paving-layer casting ending and the paving-layer-average-temperature variable quantity caused by the external environment temperature are synthetically considered, and the sum of the paving-layer average-temperature increments caused by the concrete temperature when spreading vibrating is end and the external environment temperature serve as the casting temperature of finite element calculation. Compared with the method that the actually-measured casting temperature is directly used as the casting temperature of finite element calculation, the calculating result is more accurate, and the scientific accuracy of the tracking simulation analysis result is improved.

Description

technical field [0001] The invention relates to a method for determining the pouring temperature used for finite element calculation according to the pouring temperature measurement value, and belongs to the technical field of water conservancy and hydropower engineering. Background technique [0002] During the concrete pouring construction process, the 1.5-3.0m thick pouring layer needs to be divided into several pavement layers. For example, when the thickness of the pavement layer is 0.3m, for the 1.5m thick pouring layer, it needs to be divided into 5 pavement layers. For upward pouring, set the time interval from the end of concrete closing and vibrating to the end of pouring of pavement layer as T 1 , After closing and pouring of the paving layer, when the upper layer is covered with new concrete, the temperature of the old concrete that has been paved is the pouring temperature. The thickness of the concrete paving layer is generally between 0.3m and 0.5m, and the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/08
Inventor 朱振泱张国新汪娟王振红刘毅侯文倩
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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