JP2011256061A - Apparatus and method for controlling strength of concrete member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for controlling the strength of a concrete member which is capable of predicting the time when the concrete member reaches a prescribed strength.SOLUTION: The apparatus includes a means of numerical analysis which determines the length of the time that the concrete member reaches a prescribed strength by conducting a temperature analysis based on the input information on the shape of the concrete member, the physical properties of the material, the boundary of the surface of the member, the initial temperature of the concrete member, and the environmental temperature around the concrete member, a means of acquiring the atmospheric temperature information which acquires anticipated atmospheric temperature information from the server on the Internet of a temperature information service provider via a communication means, a means of acquiring the temperature information which acquires the information on the surface temperature of the concrete member via communication means, and a means of predicting the time required for developing the prescribed strength which predicts the length of the time that the concrete member reaches the prescribed strength by conducting a temperature analysis by means of numerical analysis using the environmental temperature information acquired by the anticipated atmospheric temperature information by the means of acquiring the atmospheric temperature information as the environmental temperature and the surface temperature information acquired by the means of acquiring the temperature as the initial temperature information.

Description

  The present invention relates to a concrete member strength management apparatus and strength management method.

  Conventionally, the young age strength of the concrete and the effective temperature are in good agreement to enable the estimation of the young age strength of the concrete when the mold is removed with a small deviation without complicated work. The effective temperature of concrete actually placed in the formwork can be measured continuously, and the deviation of the young age strength of the concrete when the formwork is removed becomes smaller and the actual young age A method for estimating the young age strength of concrete is known in which a value close to strength is estimated to improve the accuracy of strength management of the placed concrete (see, for example, Patent Document 1).

  In addition, in order to shorten the cycle time of concrete production and construction, the temperature of the concrete member and the ambient temperature of the place where the concrete member is placed are detected, and whether the temperature of the concrete member has reached the ambient temperature or not. There is known a strength management method for a concrete member that estimates the hardening strength of the concrete member based on the detected ambient temperature when it is determined that the temperature of the concrete member has reached the ambient temperature ( For example, see Patent Document 2).

JP 05-339069 A JP 2009-161420 A

  By the way, when demolding in concrete work, it is necessary to confirm either the progress of a curing period in which sufficient strength is obtained or the expression of a predetermined strength. By using the strength management method described in Patent Document 2, the curing period can be shortened.

  However, since the method for confirming the expression of the predetermined strength according to the conventional technique is to estimate the strength of the concrete member at the present time, know when the mold can be removed (when the predetermined strength is expressed). There is a problem that can not be.

  This invention is made | formed in view of such a situation, and it aims at providing the strength management apparatus and strength management method of a concrete member which can estimate the time when a concrete member expresses predetermined intensity | strength.

  The present invention inputs the shape information of the concrete member, the physical property information of the material, the boundary information on the surface of the member, the initial temperature information of the concrete member, and the external temperature information of the concrete member, and performs a temperature analysis to obtain a predetermined strength. Numerical analysis means for obtaining time until expression, temperature information acquisition means for acquiring predicted temperature information from a server of the temperature information providing service on the Internet via communication means, and the concrete member via the communication means Surface temperature information and temperature information acquisition means to be acquired, and the predicted temperature information acquired by the temperature information acquisition means as the external temperature information, and the surface temperature information acquired by the temperature information acquisition means as the initial temperature information Then, the temperature analysis is performed by the numerical analysis means, and the predetermined intensity generation for predicting the time until the predetermined intensity appears. Characterized in that a time predicting means.

  The present invention inputs the shape information of the concrete member, the physical property information of the material, the boundary information on the surface of the member, the initial temperature information of the concrete member, and the external temperature information of the concrete member, and performs a temperature analysis to obtain a predetermined strength. Numerical analysis means for obtaining time until expression, temperature information acquisition means for acquiring predicted temperature information from a server of the temperature information providing service on the Internet via communication means, and the concrete member via the communication means A strength management method in a concrete member strength management apparatus comprising surface temperature information and temperature information acquisition means for acquiring the predicted temperature information acquired by the temperature information acquisition means as the external temperature information, and the temperature The surface temperature information acquired by the information acquisition means is used as the initial temperature information as the initial temperature information. Run the analysis, characterized by having a predetermined strength development time prediction step of predicting the time to express a predetermined strength.

  According to the present invention, it is possible to accurately predict the strength of concrete, and thus it is possible to implement measures such as heat curing and heat curing for realizing expression of a predetermined strength within a predetermined time. The effect that it becomes possible to manufacture a concrete member efficiently is acquired.

It is a block diagram which shows the structure of one Embodiment of this invention. It is a flowchart which shows the processing operation of the management apparatus 1 shown in FIG. It is explanatory drawing which shows an example of the time schedule of precast concrete construction.

  Hereinafter, a strength management device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment. In this figure, reference numeral 1 denotes a management device that performs temperature management of a concrete member and predicts when the concrete member develops a predetermined strength, and is configured from a personal computer or the like. Reference numeral 2 denotes a precast concrete member (hereinafter referred to as a concrete member) subjected to strength management. Reference numeral 3 is a temperature sensor attached to the concrete member 2 to be strength-managed, and detects the temperature near the surface of the concrete member 2. Reference numeral 4 denotes a temperature data acquisition unit that reads the detection value of the temperature sensor 3, and reads the detection value of the sensor 3 at predetermined time intervals.

  Reference numeral 5 denotes an infrared camera that measures the surface temperature of the mold attached to the concrete member 2. Reference numeral 6 denotes a data collection unit that collects temperature data output from the temperature data acquisition unit 4 and the infrared camera 5. Reference numeral 7 is a temperature information providing server on the Internet that performs a service for providing temperature information every three hours on the current day and the next day for each region. The management device 1, the data collection unit 7, and the temperature information provision server 7 are connected to the network 8, and the management device 1 can perform information communication with each of the data collection unit 6 and the temperature information provision server 7. It is.

  Reference numeral 11 denotes a communication unit that performs information communication with other devices via the network 8. Reference numeral 12 denotes a temperature data acquisition unit that acquires the temperature data of the concrete member 2 by receiving the temperature data transmitted from the data collection unit 6 via the communication unit 11. Reference numeral 13 denotes a temperature data storage unit that stores the temperature data acquired by the temperature data acquisition unit 12. Reference numeral 14 denotes an air temperature information acquisition unit that connects to the air temperature information providing server 7 and acquires air temperature information every 3 hours on the current day and the next day. Reference numeral 16 is a numerical value based on the temperature data of the concrete member 2 stored in the temperature data storage unit 13 and the predicted temperature data of the place where the concrete member 2 stored in the temperature information storage unit 15 is placed. It is a numerical analysis part which estimates the intensity | strength of the concrete member 2 by implementing an analysis.

  Reference numeral 17 denotes a determination unit that determines whether or not the strength estimated by the numerical analysis in the numerical analysis unit 16 has reached a demoldable strength. Reference numeral 18 denotes an analysis information storage unit that stores analysis information obtained by numerical analysis by the numerical analysis unit 16. Reference numeral 19 denotes an input unit for an operator to perform an information input operation, and is configured by a keyboard or the like, for example. Reference numeral 20 denotes a display unit that displays analysis result information output from the numerical analysis unit 16 and determination result information output from the determination unit 17, and is configured of a display device.

  Next, with reference to FIG. 2, the operation | movement which performs the intensity | strength management of the concrete member 2 is calculated | required, calculating | requiring the intensity | strength of a concrete member by numerical analysis during concrete construction. FIG. 2 is a flowchart showing the operation of managing the strength of the concrete member 2. First, when the concrete work on the site A is started (step S1), the operator operates the input unit 19 to set an analysis model and create input data (step S2). Since the analysis model created here uses a known analysis model, detailed description thereof is omitted. The input data for numerical analysis of heat conduction is input by the operator as an initial value. In temperature analysis by unsteady heat conduction analysis, input data includes (1) information on the size and shape of the member, (2) information on material properties (thermal conductivity, specific heat, density), and (3) boundary on the surface of the member (heat It is necessary to input (transfer coefficient) information, (4) member initial temperature information, and (5) external temperature (air temperature) information. Among these, the detected temperature detected by the sensor 3 or the measured value measured by the infrared camera 5 is used as the initial temperature information of the member, and the predicted temperature information provided from the temperature information providing server 7 is used as the external temperature information.

  Next, the operator performs an operation to instruct execution of numerical analysis from the input unit 19. In response to this, the numerical analysis unit 16 performs temperature analysis using the set analysis model data and the input initial value (step S3). Then, the numerical analysis unit 16 stores the temperature analysis result information in the analysis information storage unit 18. The determination unit 17 estimates the concrete strength from the temperature analysis result information stored in the analysis information storage unit 18 (step S4), and determines the time until a predetermined strength is developed from the estimated concrete strength information. Extract (step S5). Subsequently, the temperature data acquisition unit 12 acquires the initial temperature data measured by the temperature data acquisition unit 4 and collected by the data collection unit 6 via the communication unit 11 (step S6).

  Next, concrete is driven in (step S7), and the concrete is cured (step S8). Then, the numerical analysis unit 16 determines whether or not the analysis update time has come (step S9). As a result of this determination, when the analysis update time is reached, the temperature information acquisition unit 14 acquires predicted temperature data from the temperature information providing server 7 and stores it in the temperature information storage unit 15. The numerical analysis unit 16 updates the new input data (step S10), and executes the temperature analysis again (step S11). This temperature analysis is performed using the predicted temperature data for the external temperature, thereby obtaining the estimated intensity of the non-measurement point and the predicted demoldable time. The expected demolding time is obtained by adding the time required to reach a predetermined strength obtained by numerical analysis to the time when concrete is struck. The numerical analysis unit 16 stores temperature analysis result information in the analysis information storage unit 18. The determination unit 17 estimates the concrete strength from the temperature analysis result information stored in the analysis information storage unit 18 (step S12), and determines the time until a predetermined strength is developed from the estimated concrete strength information. Extract (step S13).

  Next, the determination unit 17 determines whether or not f (t) ≧ fn is satisfied (step S14). Here, t is time, f (t) is the concrete strength at time t, and fn is the required compressive strength. That is, it is determined whether the concrete strength at time t exceeds the demolding determination strength. As a result of this determination, if f (t) ≧ fn is not satisfied, the process returns to step S8 and the process is repeated. On the other hand, if f (t) ≧ fn is satisfied, demolding is performed (step S15). Then, the processing operations of Steps S7 to S15 are repeated until all the concrete works at the site A are completed (Step S16).

  In this way, unsteady temperature analysis using predicted temperature information is performed, the temperature change of the member in daily concrete construction is predicted, and the strength change of the member is predicted from the result, so that the predetermined strength required for demolding is reached Therefore, it is possible to take measures such as predicting the time required for removing the mold within the cycle time. Since the prediction process is executed every concrete placement day and is updated several times within each day, the prediction accuracy can be improved.

As described above, the predicted temperature of the concrete member is predicted using the predicted temperature to predict the onset time of the predetermined strength at a plurality of time points before placing the concrete and during the curing period, and the temperature of the concrete member detected by the sensor. Since the information is used for predicting the intensity change thereafter, it is possible to improve the prediction accuracy of the time when demolding is possible. As predicted temperature information, the predicted temperature for each region is used by the temperature information providing service on the Internet according to the construction place, not a general experience value, and thus the accuracy of the external temperature can be improved. Moreover, by predicting the expression time of a predetermined intensity at a plurality of points during the concrete implantation before and curing period, the precast Konkuritoe events time schedule to produce in one day cycle shown in FIG. 3, the time of t ₀ ~t ₅ In addition, if the strength of the member is predicted according to the update of the predicted temperature, the concrete strength can be managed efficiently.

  The strength of the concrete member is obtained by recording a program for realizing the function of the processing unit in FIG. 1 on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. Management processing may be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  It can be applied to applications where it is essential to estimate the strength of concrete members by numerical analysis.

  DESCRIPTION OF SYMBOLS 1 ... Management apparatus, 11 ... Communication part, 12 ... Temperature data acquisition part, 13 ... Temperature data storage part, 14 ... Temperature information acquisition part, 15 ... Temperature information storage part, DESCRIPTION OF SYMBOLS 16 ... Numerical analysis part, 17 ... Determination part, 18 ... Analysis information storage part, 19 ... Input part, 20 ... Display part, 2 ... Concrete member, 3 ... Sensor 4 ... Temperature data acquisition unit, 5 ... Infrared camera, 6 ... Data collection unit, 7 ... Temperature information providing server, 8 ... Network

Claims (2)

By inputting the shape information of the concrete member, the physical property information of the material, the boundary information of the member surface, the initial temperature information of the concrete member and the external temperature information of the concrete member, and performing the temperature analysis, until the predetermined strength is developed Numerical analysis means for obtaining time;
Temperature information acquisition means for acquiring predicted temperature information from a server of the temperature information providing service on the Internet via communication means;
Via the communication means, surface temperature information of the concrete member and temperature information acquisition means for acquiring,
The predicted temperature information acquired by the temperature information acquisition unit is used as the external temperature information, the surface temperature information acquired by the temperature information acquisition unit is used as the initial temperature information, and the temperature analysis is performed by the numerical analysis unit, A strength management apparatus for a concrete member, comprising: a predetermined strength expression time prediction means for predicting a time until the strength of the concrete is developed. By inputting the shape information of the concrete member, the physical property information of the material, the boundary information of the member surface, the initial temperature information of the concrete member and the external temperature information of the concrete member, and performing the temperature analysis, until the predetermined strength is developed Numerical analysis means for obtaining time, temperature information acquisition means for acquiring predicted temperature information from a server of the temperature information providing service on the Internet via communication means, and surface temperature information of the concrete member via the communication means A strength management method in a strength management device for a concrete member provided with temperature information acquisition means for acquiring,
The predicted temperature information acquired by the temperature information acquisition unit is used as the external temperature information, the surface temperature information acquired by the temperature information acquisition unit is used as the initial temperature information, and the temperature analysis is performed by the numerical analysis unit, A strength management method for a concrete member, comprising: a predetermined strength expression time prediction step for predicting a time until the strength of the concrete is developed.

Images