CN112945491A - Monitoring system capable of realizing inspection-free and maintenance-free after shock of damper - Google Patents
Monitoring system capable of realizing inspection-free and maintenance-free after shock of damper Download PDFInfo
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- CN112945491A CN112945491A CN202110345393.XA CN202110345393A CN112945491A CN 112945491 A CN112945491 A CN 112945491A CN 202110345393 A CN202110345393 A CN 202110345393A CN 112945491 A CN112945491 A CN 112945491A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
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Abstract
The invention relates to a monitoring system capable of realizing inspection-free and maintenance-free after an earthquake of a damper, which comprises: the method comprises the following steps: selecting a damper with ductility performance higher than the standard requirement and installing the damper in a building structure; monitoring the deformation of the plurality of dampers during the earthquake; counting data of maximum deformation and accumulated deformation corresponding to a plurality of dampers after the earthquake; converting the accumulated deformation data of the damper to obtain the number of turns of the damper under the designed displacement amplitude, and subtracting the number of turns from the ductility performance of the damper to obtain the ductility allowance of the damper; and when the ductility allowance of the damper is greater than the ductility requirement of the standard specification on the damper and the maximum deformation does not exceed the designed deformation value, determining that the damper is an inspection-free and repair-free damper. The ductility allowance obtained by monitoring the damper can still meet the requirement of the standard specification on the capacity of the damper required by one major earthquake, so that the damper does not need to be disassembled, the damper can be used safely, the maintenance can be avoided, and the waste of manpower and material resources is avoided.
Description
Technical Field
The invention relates to the field of damper monitoring, in particular to a monitoring system capable of realizing maintenance-free after an earthquake of a damper.
Background
In the next place, more and more buildings applying energy dissipation and shock absorption technologies need to be regularly checked and emergently checked. According to 8.7.2 energy dissipation components in JGJ297-2013, the sampling inspection is carried out after disasters such as earthquake (fortification earthquake), strong wind, fire and the like are encountered.
But a number of dissipaters (dissipaters) have been installed at various levels in the building structure, and the dampers must be removed if spot checks are required and sent to a laboratory for testing. The spot check of the post-earthquake damper is a costly and time-consuming task, mainly for the following reasons:
1. the detection cost of the damper is high, and the detection time is long;
2. many dampers are installed in a welding mode, the dampers are troublesome to cut from the original positions, and the dampers are possibly damaged by cutting, so that the reliability of a detection result is influenced; on the other hand, the cutting work can also cause certain damage to the damper connecting piece;
3. for the displacement type damper, the tested test piece cannot be used continuously, so that the product must be reworked;
4. the damper must be reinstalled in situ after detection;
therefore, as the engineering of applying the damping technology is increased, once an earthquake occurs in a certain area, the damper spot check work of the damping technology application project in the area is a difficult task which is time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a monitoring system which can realize the inspection-free and maintenance-free after the damper shakes, and solves the problem that the selective inspection of the damper in the prior art is time-consuming and labor-consuming.
The technical scheme for realizing the purpose is as follows:
the invention provides a monitoring system capable of realizing inspection-free and maintenance-free after an earthquake of a damper, which comprises the following steps:
step S0: selecting a damper with ductility performance higher than the standard requirement and installing the damper in a building structure;
step S1: monitoring the deformation of the plurality of dampers during the earthquake;
step S2: counting data of maximum deformation and accumulated deformation corresponding to the plurality of dampers after the earthquake;
step S3: converting the accumulated deformation data of the damper to obtain the number of turns of the damper under a designed displacement amplitude, and subtracting the number of turns from the ductility performance of the damper to obtain the ductility allowance of the damper;
step S4: and when the ductility allowance of the damper is greater than the ductility requirement of the standard specification on the damper and the maximum deformation does not exceed the designed deformation value, the damper is determined to be a maintenance-free damper.
The invention can realize the monitoring system of the damper after earthquake without inspection and repair, and the further improvement is that the step S1 also comprises the following steps:
obtaining deformation data of each damper of the building structure under the earthquake working condition through calculation and analysis;
and comparing the deformation data of the dampers of the same type and specification, and selecting the damper with large deformation in the same type and specification for monitoring.
The invention can realize the monitoring system of the damper after earthquake without inspection and repair, and the further improvement is that the step S1 also comprises the following steps:
and providing a displacement measuring device, and connecting the displacement measuring device with the damper so as to monitor the displacement difference value of two opposite ends of the damper in real time.
The monitoring system capable of realizing the post-earthquake inspection-free maintenance-free of the damper is further improved in that the displacement measuring device is connected with an emergency power supply or a self-contained power supply of the building structure, and the displacement data of the damper is transmitted to computer equipment.
The invention can realize the monitoring system of the damper after earthquake without inspection and repair, and the further improvement is that the step S1 also comprises the following steps:
before the damper is installed, providing a strain gauge and attaching the strain gauge to the inside of the damper;
providing a strain measuring device, connecting the strain measuring device and the damper after the damper is installed on a building structure, and monitoring the strain of the damper in real time.
The invention can realize the monitoring system of the damper without inspection and repair after the earthquake,
and connecting the strain measuring device with an emergency power supply or a self-contained power supply of the building structure, and transmitting the strain data of the damper to computer equipment.
The invention can realize the beneficial effects of the inspection-free and maintenance-free monitoring system after the damper shakes:
by properly improving the ductility allowance of the damper, when the damage of an earthquake to the damper does not exceed the ductility allowance and the design displacement, the ductility allowance obtained by monitoring the damper can still meet the requirement of the standard specification on the capacity of the damper required by one major earthquake, the damper does not need to be disassembled for random inspection, the safe use can be ensured, the inspection and the repair are not needed, and the waste of manpower and material resources is avoided.
Drawings
Fig. 1 is a schematic view of a displacement monitoring position of a monitoring system capable of realizing post-earthquake inspection-free and repair-free of a damper according to the present invention.
Fig. 2 is a schematic diagram of a strain monitoring position of the monitoring system capable of realizing post-earthquake inspection-free and repair-free of the damper according to the present invention.
Fig. 3 is a plan view of the damper of the monitoring system for post-earthquake maintenance-free monitoring of the damper according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Fig. 1 is a schematic diagram of a displacement monitoring position of the monitoring system capable of realizing post-earthquake inspection and maintenance-free of the damper according to the present invention. Fig. 2 is a schematic diagram of a strain monitoring position of the monitoring system capable of realizing post-earthquake inspection-free and repair-free of the damper according to the present invention. Referring to fig. 1 and 2, the monitoring system capable of realizing post-earthquake maintenance-free monitoring of the damper of the invention comprises the following steps:
step S0: selecting and installing a damper 20 having a ductility performance above specification requirements in the building structure 10;
step S1: monitoring deformation of the plurality of dampers 20 in the earthquake;
step S2: counting data of maximum deformation and accumulated deformation corresponding to the plurality of dampers 20 after the earthquake;
step S3: converting the accumulated deformation data of the damper 20 to obtain the number of turns of the damper under the designed displacement amplitude, and subtracting the number of turns from the ductility performance of the damper 20 to obtain the ductility allowance of the damper 20;
step S4: and when the ductility allowance of the damper 20 is larger than the ductility requirement of the standard specification on the damper and the maximum deformation does not exceed the designed deformation value, the damper 20 is determined to be a maintenance-free damper.
By properly improving the ductility allowance of the damper, when the damage of an earthquake to the damper does not exceed the ductility allowance and the design displacement, the ductility allowance obtained by monitoring the damper can still meet the requirement of the standard specification on the capacity of the damper required by one major earthquake, the damper does not need to be disassembled for random inspection, the safe use can be ensured, the inspection and the repair are not needed, and the waste of manpower and material resources is avoided.
Ductility, refers to the ability of a structure, component, or section of a component to deform from yielding to the point of maximum load bearing capacity or later without a significant reduction in load bearing capacity.
The current standard specification requires that the damper be ductile for 30 cycles of reciprocation at the design displacement amplitude. In this embodiment, the core material having good ductility is selected to improve the ductility performance of the damper up to 40 turns.
Specifically, the cumulative deformation is an aggregate of the deformations of the epicenter individual dampers. Deformation can be measured by displacement or strain. The cumulative displacement is the sum of the displacements of the individual dampers in the epicenter.
The data of the accumulated deformation of the damper 20 is converted to obtain the number of turns of the damper at the designed displacement amplitude. For example, the cumulative deformation data translates to 5 corresponding turns at the design displacement amplitude. Wherein, the conversion mode is as follows: one cycle of the design displacement amplitude is the design displacement x 4(± design displacement sine wave cycles one cycle). Accumulated deformation divided by the displacement of one design displacement cycle as the number of turns
Subtracting the number of turns obtained by the conversion from the ductility performance of the damper 20 to obtain the ductility allowance of the damper 20; namely, the ductility margin is 40-5-35 circles, because 35 circles is more than 30 circles (the ductility requirement of the current standard specification on the damper is 30 circles reciprocating under the designed displacement amplitude), the ductility margin after the damper is shaken can still meet the capacity requirement of the standard specification on the damper after experiencing a large shake, and the damper can be determined to be an inspection-free and repair-free damper.
As a better implementation mode of the monitoring system capable of realizing the post-earthquake inspection-free maintenance-free of the dampers, deformation data of each damper of the building structure under the earthquake working condition are obtained through calculation and analysis; and comparing the deformation data of the dampers of the same type and specification, and selecting the damper with large deformation in the same type and specification for monitoring.
For example, in this embodiment, the deformation data of the dampers of the 4 th floor and the 2 nd floor is large, and the deformation data of the dampers of the 4 th floor and the 2 nd floor can be monitored, so that the smaller deformation data of the dampers of other floors is not required to be monitored, and the workload is reduced. Further, typical dampers are typically located at floors with greater deformation and at locations around the floor level.
As a preferred embodiment of the monitoring system capable of achieving the post-earthquake maintenance-free monitoring of the damper of the present invention, refer to fig. 3, which is a plan view of the damper of the monitoring system capable of achieving the post-earthquake maintenance-free monitoring of the damper of the present invention. Step S1 further includes: depending on the location of the floor plan, the floor mounted dampers 20 at the peripheral locations are selected for monitoring. As shown in connection with fig. 3, the floor 11 is substantially rectangular in plan view. And selecting dampers arranged on the four edges of the floor as measuring points for monitoring. The dampers located in the middle of the floor may not need monitoring, reducing workload.
In most cases, the displacement of the periphery of the same floor 11 of the building structure 10, i.e. the displacement of the damper 20 located at the periphery of the same floor, is large, and the displacement value of the internal damper at the same floor can be basically enveloped, so that the displacement value of the internal damper at the same floor does not need to be monitored, and the workload is reduced.
As a preferred embodiment of the monitoring system capable of achieving post-earthquake maintenance-free of the damper according to the present invention, as shown in fig. 1, step S1 further includes: a displacement measuring device 30 is provided, and the displacement measuring device 30 is connected to the damper 20, thereby monitoring a displacement difference between the upper and lower opposite ends of the damper 20 in real time. The displacement measuring device 30 may be a product of the prior art.
As a preferred embodiment of the monitoring system for realizing the maintenance-free after the damper is shocked, the displacement measuring device 30 is connected with the emergency power supply or the self-contained power supply of the building structure 10, and the displacement data of the damper is transmitted to the computer equipment, so that the real-time monitoring and the query are convenient.
As a preferred embodiment of the monitoring system capable of achieving post-earthquake maintenance-free of the damper according to the present invention, as shown in fig. 2, step S1 further includes: before the damper 20 is installed, providing a strain gauge to attach the strain gauge to the inside of the damper 20; the strain measuring device 40 is provided and the strain of the damper is monitored in real time by connecting the strain measuring device 40 and the damper 20 after the damper 20 is installed in the building structure 10.
Specifically, the strain gauge is an element for measuring strain that is constituted by a sensitive grid or the like. The working principle of the resistance strain gauge is based on the strain effect, that is, when a conductor or a semiconductor material is mechanically deformed under the action of external force, the resistance value of the conductor or the semiconductor material is correspondingly changed, and the phenomenon is called the strain effect.
As a better implementation mode of the monitoring system capable of realizing the maintenance-free after the damper is in an earthquake, the strain measuring device is connected with an emergency power supply or a self-contained power supply of a building structure, and the strain data of the damper is transmitted to computer equipment, so that the real-time monitoring and the query are convenient.
If the earthquake action is met, the real effect of the damper under the earthquake action can be observed through the displacement or strain data of the damper, and the application of the energy-eliminating shock absorption technology is also significant.
The monitoring system capable of realizing the inspection-free and maintenance-free after the damper shakes has the beneficial effects that:
by properly improving the ductility allowance of the damper, when the damage of an earthquake to the damper does not exceed the ductility allowance and the design displacement, the ductility allowance obtained by monitoring the damper can still meet the requirement of the standard specification on the capacity of the damper required by one major earthquake, the damper does not need to be disassembled for random inspection, the safe use can be ensured, the inspection and the repair can be avoided, and the waste of manpower and material resources is avoided.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (6)
1. A monitoring system capable of realizing maintenance-free inspection after an earthquake of a damper is characterized by comprising the following steps:
step S0: selecting a damper with ductility performance higher than the standard requirement and installing the damper in a building structure;
step S1: monitoring the deformation of the plurality of dampers during the earthquake;
step S2: counting data of maximum deformation and accumulated deformation corresponding to the plurality of dampers after the earthquake;
step S3: converting the accumulated deformation data of the damper to obtain the number of turns of the damper under a designed displacement amplitude, and subtracting the number of turns from the ductility performance of the damper to obtain the ductility allowance of the damper;
step S4: and when the ductility allowance of the damper is greater than the ductility requirement of the standard specification on the damper and the maximum deformation does not exceed the designed deformation value, the damper is determined to be a maintenance-free damper.
2. The monitoring system capable of performing post-earthquake maintenance-free of a damper as claimed in claim 1, wherein the step S1 further comprises:
obtaining deformation data of each damper of the building structure under the earthquake working condition through calculation and analysis;
and comparing the deformation data of the dampers of the same type and specification, and selecting the damper with large deformation in the same type and specification for monitoring.
3. The monitoring system capable of performing post-earthquake maintenance-free of a damper as claimed in claim 1, wherein the step S1 further comprises:
and providing a displacement measuring device, and connecting the displacement measuring device with the damper so as to monitor the displacement difference value of two opposite ends of the damper in real time.
4. The monitoring system capable of realizing post-earthquake maintenance-free of the damper as claimed in claim 3,
and connecting the displacement measuring device with an emergency power supply or a self-contained power supply of the building structure, and transmitting the displacement data of the damper to computer equipment.
5. The monitoring system capable of performing post-earthquake maintenance-free of a damper as claimed in claim 1, wherein the step S1 further comprises:
before the damper is installed, providing a strain gauge and attaching the strain gauge to the inside of the damper;
providing a strain measuring device, connecting the strain measuring device and the damper after the damper is installed on a building structure, and monitoring the strain of the damper in real time.
6. The monitoring system capable of realizing post-earthquake maintenance-free of the damper as claimed in claim 5,
and connecting the strain measuring device with an emergency power supply or a self-contained power supply of the building structure, and transmitting the strain data of the damper to computer equipment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117761759A (en) * | 2024-02-22 | 2024-03-26 | 北京赛福思创减震科技股份公司 | Earthquake response monitoring system of earthquake reduction and isolation building |
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| CN117761759B (en) * | 2024-02-22 | 2024-05-07 | 北京赛福思创减震科技股份公司 | Earthquake response monitoring system of earthquake reduction and isolation building |
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