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Method for monitoring compaction of concrete-filled steel tube structure based on piezoelectric intelligent aggregate

A technology of piezoelectric intelligent aggregate and steel pipe concrete, which is applied in the direction of material analysis, measuring devices, and analysis materials through electromagnetic means, can solve the problems of expensive ultrasonic testing equipment, and achieve breakthroughs in damage assessment bottlenecks, rapid monitoring, Simple operation effect

Inactive Publication Date: 2012-06-20
ANGANG CONSTR CONSORTIUM
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Problems solved by technology

In addition, the price of ultrasonic testing equipment is relatively expensive

Method used

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  • Method for monitoring compaction of concrete-filled steel tube structure based on piezoelectric intelligent aggregate
  • Method for monitoring compaction of concrete-filled steel tube structure based on piezoelectric intelligent aggregate
  • Method for monitoring compaction of concrete-filled steel tube structure based on piezoelectric intelligent aggregate

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Embodiment Construction

[0052] The present invention will be described in detail below with reference to the accompanying drawings.

[0053] Such as Figure 4 The way shown, in a 300×300×9000mm 3 9 pieces of piezoelectric intelligent aggregates are pre-embedded in the square steel tube concrete column, and the concrete is poured and maintained naturally.

[0054] Such as figure 2 As shown, the piezoelectric smart aggregate includes PZT sheet, silica gel waterproof layer, shielded wire, shielded joint, fine stone concrete or mortar outer cladding.

[0055] The specific operation steps of the monitoring method in the present embodiment are:

[0056] a. First determine the serial number of the piezoelectric intelligent aggregate. In this example, the serial number is from bottom to top, such as Figure 4 shown.

[0057] b. Take 1 and 2 smart aggregates as an example figure 1 (a) and Figure 4 As shown in (d), first the pulse wave is excited by aggregate 1 and received by aggregate 2, and then ag...

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Abstract

The invention discloses a method for monitoring the compaction of a concrete-filled steel tube structure based on a piezoelectric intelligent aggregate and a sending and receiving interactive approach, belonging to the field of monitoring the compaction status of the concrete-filled steel tube structure. The method comprises the following steps: embedding the piezoelectric intelligent aggregates in pairs in the concrete-filled steel tube structure in advance; excitating the intelligent aggregates through a signal generator; collecting the output signal of the piezoelectric intelligent aggregates corresponding to the inner part of a concrete-filled steel tube through a signal collection system; interchanging two intelligent aggregate functions; repeatedly excitating and signal receiving processes; carrying out analytical processing on the signals acquired at two times, so as to obtain the index of similarity level of the signals acquired at two times; and estimating the compaction status in the concrete-filled steel tube by utilizing the index. The method provided by the invention can be used for rapidly monitoring the compaction status of the concrete-filled steel tube, can be used for accurately finding out the damage position, and has high sensitivity and rapid response, and low price, and is simple in operation.

Description

technical field [0001] The invention relates to a method for monitoring the compactness of concrete in a steel tube concrete structure, and further refers to a method for monitoring the compactness of concrete in a steel tube concrete structure based on a piezoelectric intelligent aggregate and a push-to-retract interaction method. Background technique [0002] Concrete filled steel tube is the main load-bearing system of the structure, and the compactness of the concrete will directly affect the mechanical performance of the structure. [0003] At present, the method of testing the compactness of CFST is ultrasonic method. In this method, the ultrasonic detector is used as the main detection equipment, and the ultrasonic wave velocity is used as the discriminant parameter of the defect. Although this method has been widely used in testing the compactness of CFST, there are still some shortcomings. For example, the detection results are greatly affected by human factors, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 阎石綦宝晖付锦治
Owner ANGANG CONSTR CONSORTIUM
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