CN101354305A - Method and system for monitoring building structure collapse vibration when fire hazard occurs - Google Patents
Method and system for monitoring building structure collapse vibration when fire hazard occurs Download PDFInfo
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- CN101354305A CN101354305A CNA2008100647637A CN200810064763A CN101354305A CN 101354305 A CN101354305 A CN 101354305A CN A2008100647637 A CNA2008100647637 A CN A2008100647637A CN 200810064763 A CN200810064763 A CN 200810064763A CN 101354305 A CN101354305 A CN 101354305A
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Abstract
The invention provides a system and a method for monitoring the collapse vibration of a building structure in a fire. The monitoring system essentially consists of a system for testing vibration characters and relevant software for monitoring the collapse. The system for testing the vibration characters consists of a high-temperature-resistance vibration sensor, a matched signal amplifier and a matched smart signal collecting and processing analyzer. The monitoring software is utility software independently researched and developed and based on C++ Language, which can forecast the functional mode of the building structure according to the parameters of the vibration characters input to the system for testing the vibration characters. Therefore, when a fire happens, the functional mode of the building structure can be know well so that fire-fighting time can be accurately seized for avoiding heavy casualties and property losses. The development of the system can help to know well of the vibration characters of the building structure, caused by the fire, forecast and monitor the collapse of the building and provide important bases for fire-fighting.
Description
(1) technical field
The present invention relates to the building structure technical field of preventing and reducing natural disasters, be specifically related to a kind of building structure collapse vibration when fire hazard supervisory system.
(2) background technology
Along with development of science and technology, the vibration characteristics test that engineering technical personnel can carry out being caused by wind, earthquake equal excitation and the collection and the processing of data.Vibration-testing mainly is by sensor, amplifier and demonstration or recorder, measures the amounts of exercise such as displacement, speed, acceleration of engineering structure its significant points under excitation, thus the duty of solution structure.By momental measurement, can the dynamic characteristic of solution structure, as characterisitic parameters such as natural frequency, natural mode of vibration, damping and dynamic stiffness, for the design of the power of engineering structure provides foundation.But so far, the vibration characteristics of object is tested under the still unmatchful high temperature, and monitors the precedent of building structure duty with it.
(3) summary of the invention
The object of the present invention is to provide a kind of duty that can monitor building structure under the fire preferably, whether the duty that can understand building structure safety, immediately for the fire fighter provides useful information, can in time evacuate the building structure collapse vibration when fire hazard supervisory system of trapped personnel and rescue valuable cargo.
The object of the present invention is achieved like this: the signal acquiring processing system and the monitoring unit that is connected signal acquiring processing system of its involving vibrations sensor, the signal amplification filtering system that connects vibration transducer, connection signal amplification filtering system, signal amplifies filtering system and comprises interconnective signal amplifier and signal filter, signal amplifier connects vibration transducer, signal filter connects signal acquiring processing system, and vibration transducer is arranged on the building structural element.
The present invention also comprises some technical characterictics like this:
1, described building structural element comprises pillar middle part and top, the span centre of beam, and 1/4,1/2 the striding of plate;
2, the bottom of described sensor is provided with heat-barrier material.
Another object of the present invention is to provide a kind of building structure collapse vibration when fire hazard method for supervising.
Method for supervising of the present invention is: at first choose the reference mark of carrying out the vibration characteristics test, the correct vibration transducer of laying, vibration transducer is gathered the building structural element raw data, the data that collect subsequently are through the amplification and the filtration of signal amplifier, signal filter, the entering signal acquisition processing system, obtain vibration parameters, vibration parameters that will record in real time and monitoring means connect at last, decision criteria by monitoring of software inside in the monitoring unit, judge whether safety of building structure, and when danger, send early warning.
Method for supervising of the present invention also has some technical characterictics like this:
When 1, described vibration parameters under the building structure fire that records in real time surpasses each self-corresponding limit value, judge to obtain the building structure conclusion of collapsing;
2, displacement in the described building structural element, the point that distortion is bigger, as the unique point of vibration-testing, the vibration parameters at unique point place comprises amplitude ratio, frequency ratio, damping ratio and acceleration;
3, described vibration transducer carries out technical finesse and protection; treatment measures are: refractory brick is fixed on surface of concrete structure; use cementing agent that vibration transducer is bonded on the refractory brick, will cover with alumina silica refractory around the vibration transducer at last.
The present invention has set up the supervisory system that a cover building structure is collapsed under fire.Quantitative corresponding relation between promptly collapsing according to vibration parameters of setting up and building structure, and utilize vibration test technology, some unique point in the structure is carried out the vibration characteristics test that fire causes, in conjunction with relevant monitoring of software, the duty of predicted entire building structure under fire judges whether safety.
(1) chooses the reference mark of carrying out the vibration characteristics test.Different building elements, the position at its reference mark is different.
When (2) testing, the vibration transducer that normal temperature is used down carries out certain technical finesse and protection, makes its operate as normal at high temperature.
(3) when the vibration parameters under the building structure fire that records in real time surpassed each self-corresponding limit value, building structure was collapsed.
Behavior under the member fire such as the beam of building structure, post, plate is different, but because the vibration characteristics of the member that the fire excitation causes has good regularity.So, by vibration parameters under the monitoring building element fire, can judge the duty of building structure, judge its whether safety, thereby can instruct fire-fighting fire extinguishing work.
The present invention has comprehensively determined the vibration parameters of building structure and the corresponding relation between the structural collapse on a large amount of experimental basis.For determining this relation, the vibration characteristics that needs to cause owing to other excitations in the building structure is filtered, and just can obtain the oscillation phenomenon that real fire excitation causes.Be the relation of reaction structure vibration parameters and building structure duty scientifically, introduced the vibration parameters ratio, be i.e. the ratio of structural vibration intrinsic numeric under structural vibrations intrinsic numeric and each the self-corresponding normal temperature under the fire.Under the fire, when building structure collapses is one of problem of relatively being concerned about of fire fighter, can instruct fire-fighting fire extinguishing work in view of the above.
Technical scheme of the present invention is:
(1) displacement in the building structural element, the point that distortion is bigger are as the unique point of vibration-testing.The vibration parameters at unique point place (amplitude, frequency and damping), reflection are relatively more responsive.These unique points can the integrally-built vibration characteristics of accurate response, and is convenient to arrange vibration transducer.Referring to Fig. 2.
(2) need the vibration transducer that normal temperature uses is down carried out technical finesse and protection, make its operate as normal at high temperature.Referring to Fig. 3.Treatment measures are: refractory brick is fixed on surface of concrete structure, uses cementing agent that vibration transducer is bonded on the refractory brick, will cover with alumina silica refractory around the vibration transducer at last.
The limit value of vibration parameters is input to the monitoring of software of establishment voluntarily when (3) collapsing under the fire that will determine according to great number tested data, as the criterion of building structure duty.
(4) building construction vibration characterisitic parameter that records in real time under the fire and the monitoring of software of working out are voluntarily connected, monitor the duty of building structure in real time.The vibration parameters form of test gained is referring to Fig. 4, Fig. 5.The process flow diagram of monitoring of software is referring to Fig. 6.
This patent belongs to the prevent and reduce natural disasters application technology in field of building structure, is applicable to the vibration characteristics of the building structure that prediction and monitoring fire cause and collapses, and instructs fire-fighting work.Specifically, the application technology that be collection sensor, electronics, signal analysis, structural vibration is theoretical and be programmed in one.
Effect of the present invention: the present invention can monitor the duty of building structure under the fire preferably, and whether the duty that can understand building structure safety, immediately for the fire fighter provides useful information, can in time evacuate trapped personnel and rescue valuable cargo.
(4) description of drawings
Fig. 1 is a building structure collapse vibration when fire hazard supervisory system synoptic diagram;
Fig. 2 is that certain floor measuring point is arranged and measuring point numbering figure;
Fig. 3 is the fixing figure of vibration transducer;
Fig. 4-Fig. 5 is 2 a acceleration diagram, and wherein Fig. 4 is that (130min～150min) is measuring point 2 acceleration change curves (150min～220min) to measuring point 2 acceleration change curves on foot;
Fig. 6 is the process flow diagram of monitoring of software.
(5) embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments:
In conjunction with Fig. 1, the workflow of construction collapse in fire supervisory system as can be known.Vibration transducer 1 is arranged on the floor 2, it records the raw data of vibration characteristics, through signal amplifier, signal filter and signal acquiring processing system, obtain the real-time vibration parameters of building structure, at last vibration parameters Input Monitor Connector software is carried out safe judgement.
1, the present invention implements according to the following steps:
(1) measuring point is arranged.Displacement in the building structural element, the point that distortion is bigger are as the unique point of vibration-testing, shown in position among Fig. 23,4.
(2) vibration characteristics test.Select suitable surveying instrument for use, the vibration characteristics of each unique point is tested, and data are gathered and handled.Vibration transducer is fixing as shown in Figure 3.
(3) the vibration parameters limit value that collapses according to the reflection building structure of Input Monitor Connector software is handled the vibration parameters (referring to Fig. 4, Fig. 5) of real-time input, judges the duty of building structure.
2, concrete operations are as follows:
(1) determines that building structure especially closes on when collapsing and the corresponding relation of vibration parameters at the different operating state under the fire.According to a large amount of test figures, determine this corresponding relation.
(2), determine the unique point of vibration-testing, and carry out the laying of vibration transducer according to the building structure characteristics.Pillar middle part and top, the span centre of beam, and 1/4,1/2 the striding of plate, the vibration characteristics at these positions needs stress test.For adapting to hot environment, need sensor is carried out certain technical finesse.In the bottom of sensor, sizeable heat-barrier material need be set, to protect sensor operate as normal at high temperature.All need be fixed well between heat-barrier material and buildings and heat-barrier material thereof and the sensor, guarantee the condition of following of normal operation of sensor.
(3) test of building construction vibration characteristic.Utilize through the vibration transducer of technical finesse and the signal amplifier and the intelligent signal collection Treatment Analysis instrument of adapted thereof.Instrument is all selected general getting final product on the market for use.The parameter of test is mainly amplitude ratio, frequency ratio, damping ratio and acceleration.
(4) the vibration parameters relation corresponding with the building structure duty, input is the Control Software of establishment voluntarily, as the judgment criterion of prediction building structure duty.
(5) utilize computing machine, the vibration parameters that records in real time in the fire process is continuously judged, draw building structure and whether close on and collapse, and send early warning.
Claims (7)
1, a kind of building structure collapse vibration when fire hazard supervisory system, the signal that it is characterized in that its involving vibrations sensor, connection vibration transducer amplifies filtering system, connects signal acquiring processing system and the monitoring unit that is connected signal acquiring processing system that signal amplifies filtering system, signal amplifies filtering system and comprises interconnective signal amplifier and signal filter, signal amplifier connects vibration transducer, signal filter connects signal acquiring processing system, and vibration transducer is arranged on the building structural element.
2, building structure collapse vibration when fire hazard supervisory system according to claim 1 is characterized in that described building structural element comprises pillar middle part and top, the span centre of beam, and 1/4,1/2 the striding of plate.
3, building structure collapse vibration when fire hazard supervisory system according to claim 1 and 2 is characterized in that the bottom of described sensor is provided with heat-barrier material.
4, a kind of building structure collapse vibration when fire hazard method for supervising according to claim 1, it is characterized in that this method for supervising is: at first choose the reference mark of carrying out the vibration characteristics test, the correct vibration transducer of laying, vibration transducer is gathered the building structural element raw data, the data that collect subsequently are through signal amplifier, the amplification of signal filter and filtration, the entering signal acquisition processing system, obtain vibration parameters, vibration parameters that will record in real time and monitoring means connect at last, decision criteria by monitoring of software inside in the monitoring unit, judge whether safety of building structure, and when danger, send early warning.
5, a kind of building structure collapse vibration when fire hazard method for supervising according to claim 4, when it is characterized in that described vibration parameters under the building structure fire that records in real time surpasses each self-corresponding limit value, judge to obtain the building structure conclusion of collapsing.
6, a kind of building structure collapse vibration when fire hazard method for supervising according to claim 4, it is characterized in that displacement in the described building structural element, the point that distortion is bigger, unique point as vibration-testing, the vibration parameters at unique point place comprises amplitude ratio, frequency ratio, damping ratio and acceleration.
7, a kind of building structure collapse vibration when fire hazard method for supervising according to claim 4; it is characterized in that described vibration transducer carries out technical finesse and protection; treatment measures are: refractory brick is fixed on surface of concrete structure; use cementing agent that vibration transducer is bonded on the refractory brick, will cover with alumina silica refractory around the vibration transducer at last.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100647637A CN101354305A (en) | 2008-06-18 | 2008-06-18 | Method and system for monitoring building structure collapse vibration when fire hazard occurs |
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| CNA2008100647637A CN101354305A (en) | 2008-06-18 | 2008-06-18 | Method and system for monitoring building structure collapse vibration when fire hazard occurs |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445756A (en) * | 2014-09-24 | 2016-03-30 | 株式会社拓普康 | Safety diagnosis system for structure |
| CN106767718A (en) * | 2016-12-21 | 2017-05-31 | 中国矿业大学 | Steel building caves in risk monitoring method in fire |
| CN113965990A (en) * | 2021-10-21 | 2022-01-21 | 应急管理部四川消防研究所 | Indoor positioning device applied to building structure in fire state |
-
2008
- 2008-06-18 CN CNA2008100647637A patent/CN101354305A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445756A (en) * | 2014-09-24 | 2016-03-30 | 株式会社拓普康 | Safety diagnosis system for structure |
| CN106767718A (en) * | 2016-12-21 | 2017-05-31 | 中国矿业大学 | Steel building caves in risk monitoring method in fire |
| CN106767718B (en) * | 2016-12-21 | 2019-06-14 | 中国矿业大学 | Steel building collapsing risk monitoring method in fire |
| CN113965990A (en) * | 2021-10-21 | 2022-01-21 | 应急管理部四川消防研究所 | Indoor positioning device applied to building structure in fire state |
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Open date: 20090128 |