Structural security assessment method and device

Abstract

The invention provides a structure safety assessment method and equipment. The method comprises the following steps: calculating a structure safety assessment threshold value by utilizing a method of combining numerical simulation analysis and monitoring data; the stress state of the most unfavorable stress component is used as a basis for safety assessment of the historical building structure; establishing a relationship between the monitoring data of the non-key monitoring point positions and the stress state of the most unfavorable stress component through a numerical simulation analysis method; decoupling the monitoring data through the modal matrix to obtain an expression of independent deformation of each monitoring point taking the monitoring data as an independent variable; the invention provides a method for carrying out overall structure safety assessment by using non-key point monitoring data.

Description

Technical Field

[0001] The invention relates to a structural safety assessment method and equipment. Background Art

[0002] With the increase of service time and the deterioration of material properties, building structural safety has become a major issue restricting the normal use of historical buildings. Structural health monitoring is the main method to understand the service status of structures and obtain structural safety assessment data.

[0003] Generally speaking, when monitoring the health of building structures, sensors are installed at key locations that affect the safety status of the structure, mainly at the most unfavorable stress-bearing components, locations with maximum deformation, etc. However, due to the high protection requirements for historical buildings, the installation of sensors is restricted by building protection, and the locations where sensors are allowed to be installed are often not key points that affect structural safety. How to conduct overall structural safety assessment based on monitoring data from non-key points has become a major issue in the safety assessment of historical building structures.

[0004] At present, in the field of structural safety assessment of historical buildings, there is no theory and method for using non-critical point monitoring data to conduct structural safety assessment. Summary of the invention

[0005] The purpose of the present invention is to provide a structural safety assessment method and equipment.

[0006] In order to solve the above problems, the present invention provides a structural safety assessment method, comprising:

[0007] According to the requirements of building protection, determine the monitoring points arranged in the subsequent health monitoring of the building structure and the monitoring type corresponding to each monitoring point, wherein the monitoring points include: non-critical points;

[0008] Conduct numerical simulation analysis on the building structure to be evaluated for structural safety, and calculate the initial stress and initial deformation values ​​of each monitoring point in the building structure under the action of the dead load alone;

[0009] Obtain the most unfavorable component of the building structure;

[0010] Based on the most unfavorable component of the building structure, the actual stress value and actual deformation value corresponding to each monitoring point are obtained;

[0011] Based on the actual stress value and actual deformation value corresponding to each monitoring point, and the initial stress value and initial deformation value of each monitoring point, the deformation threshold of each monitoring point at different safety levels in the structural safety assessment is calculated;

[0012] Based on the actual deformation value corresponding to each monitoring point under the action of forced external loads of different magnitudes, the independent deformation expressions of all monitoring points are obtained;

[0013] According to the independent deformation expression of each monitoring point and the deformation threshold of each monitoring point under different safety levels, the safety assessment criterion of each monitoring point is obtained.

[0014] Furthermore, in the above method, the monitoring type includes: one or any combination of vertical deformation, horizontal deformation, axial force, stress and strain.

[0015] Furthermore, in the above method, obtaining the most unfavorable component of the building structure under stress includes:

[0016] Numerical simulation analysis software is used to calculate the current stress and deformation of the building structure under the simultaneous action of dead load and live load. Based on the current stress and deformation of the building structure, the most unfavorable components of the building structure under different working conditions are marked.

[0017] Furthermore, in the above method, the different working conditions refer to a combination of the same dead load and different live loads.

[0018] Furthermore, in the above method, based on the most unfavorable component of the building structure, the actual stress value and the actual deformation value corresponding to each monitoring point are obtained, including:

[0019] In the numerical simulation analysis software, a forced external load corresponding to the monitoring type is applied to each monitoring point, and the different stress states of the most unfavorable component are used as indicators to load the forced external load, so as to determine the magnitude of the forced external load under different stress states of the most unfavorable component; and the actual force value and actual deformation value corresponding to each monitoring point under the action of forced external loads of different magnitudes are obtained.

[0020] Furthermore, in the above method, the different stress states of the most unfavorable component are different percentage values ​​of the ultimate bearing capacity of the most unfavorable component.

[0021] Furthermore, in the above method, different safety levels in the structural safety assessment correspond to different stress states of the most unfavorable components.

[0022] Furthermore, in the above method, based on the actual deformation value corresponding to each monitoring point under the forced external load of different magnitudes, the independent deformation expressions of all monitoring points are obtained, including:

[0023] Based on the actual deformation value corresponding to each monitoring point under the forced external load of different magnitudes, the coupling relationship between the actual deformation values ​​of each monitoring point is obtained, and the inverse matrix of the modal matrix is ​​used to decouple the actual deformation value of each monitoring point to obtain independent deformation expressions for all monitoring points.

[0024] According to another aspect of the present invention, there is further provided a computer-readable storage medium having computer-executable instructions stored thereon, wherein when the computer-executable instructions are executed by a processor, the processor is enabled to: execute any of the methods described above.

[0025] According to another aspect of the present invention, there is also provided a computer device, comprising:

[0026] Processor; and

[0027] A memory arranged to store computer executable instructions, which when executed cause the processor to: perform any of the methods described above.

[0028] Compared with the existing technology, in order to address the problem that there is no method for overall structural safety assessment of historical buildings through monitoring data of non-critical points, the present invention proposes a method for structural safety assessment by combining numerical simulation analysis with monitoring data of non-critical points, providing technical support for structural safety assessment of historical buildings during daily use.

[0029] The present invention is applicable to situations where the sensor installation location is restricted by building protection during structural health monitoring of historical buildings. By adopting the present invention to perform structural safety assessment, the overall safety assessment of the structure can be performed through monitoring data of non-critical locations and numerical simulation analysis calculation results, thereby providing technical support for the safe operation of historical buildings.

[0030] The present invention is applicable to historical buildings where, due to restrictions on building protection requirements, monitoring sensors cannot be arranged at key points that affect structural safety, and overall structural safety assessment can only be performed through monitoring data from non-key points. The present invention provides technical support for structural safety assessment during daily use of historical buildings, thereby ensuring the safe and normal operation of historical buildings.

[0031] Specifically, the present invention achieves the following innovations:

[0032] 1) Calculate the structural safety assessment threshold by combining numerical simulation analysis with monitoring data;

[0033] 2) The stress state of the most unfavorable stress-bearing components is used as the basis for the safety assessment of historical building structures;

[0034] 3) Through the method of numerical simulation analysis, the relationship between the monitoring data of non-critical monitoring points and the stress state of the most unfavorable stress-bearing components is established;

[0035] 4) Decoupling the monitoring data through the modal matrix to obtain the expression of independent deformation of each monitoring point with the monitoring data as the independent variable;

[0036] 5) A method for overall structural safety assessment using non-critical point monitoring data is proposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of a structural safety assessment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1 As shown, the present invention provides a structural safety assessment method, comprising:

[0040] Step S1, according to the building protection requirements, determine the monitoring points arranged in the subsequent health monitoring of the building structure and the monitoring type corresponding to each monitoring point, wherein the monitoring points include: non-critical points;

[0041] Of course, the monitoring points may also include: key points;

[0042] Preferably, the monitoring type includes: one or any combination of vertical deformation, horizontal deformation, axial force, stress and strain; wherein the units of vertical deformation and horizontal deformation can be millimeters or centimeters, and the unit of axial force can be Newtons or kilonewtons; the unit of stress is Pascals or MPa; the unit of strain is ε;

[0043] Step S2, performing numerical simulation analysis on the building structure to be subjected to structural safety assessment, and calculating the initial stress value and initial deformation value of each monitoring point in the building structure under the action of a single dead load.

[0044] Here, the load size and position of the dead load do not change with time; such as the dead weight of the building, reinforced concrete, fixed equipment in the building, etc.

[0045] Step S3, obtaining the most unfavorable stress component of the building structure, including: using numerical simulation analysis software to calculate the current stress condition and current deformation condition of the building structure under the simultaneous action of the dead load and the live load; based on the current stress condition and current deformation condition of the building structure, marking the most unfavorable stress component of the building structure under different working conditions;

[0046] Here, the most unfavorable component under stress refers to the component in the building structure that is most dangerous under stress, that is, the component closest to its ultimate bearing capacity;

[0047] The different working conditions refer to the combination of the same dead load and different live loads;

[0048] Whether live loads occur, their magnitude and their locations all change over time; for example, different people on the floor;

[0049] Step S4, based on the most unfavorable component of the building structure, obtain the actual stress value and actual deformation value corresponding to each monitoring point, including:

[0050] In the numerical simulation analysis software, a compulsory external load corresponding to the monitoring type is applied to each monitoring point respectively, and the different stress states of the most unfavorable component are used as indicators to load the compulsory external load, so as to determine the magnitude of the compulsory external load under different stress states of the most unfavorable component; and the actual force value and actual deformation value corresponding to each monitoring point under the action of the compulsory external load of different magnitudes are obtained;

[0051] Preferably, the different stress states of the most unfavorable component are different percentage values ​​of the ultimate bearing capacity of the most unfavorable component; for example, the different stress states of the most unfavorable component may be 100% of the ultimate bearing capacity, 80% of the ultimate bearing capacity, 60% of the ultimate bearing capacity, and so on.

[0052] Step S5, based on the actual stress value and actual deformation value corresponding to each monitoring point, and the initial stress value and initial deformation value of each monitoring point, calculate the deformation threshold of each monitoring point at different safety levels in the health monitoring of the building structure and the structural safety assessment;

[0053] Preferably, different safety levels in the structural safety assessment correspond to different stress states of the most unfavorable components; for example, one safety level corresponds to one stress state;

[0054] Step S6, based on the actual deformation value corresponding to each monitoring point under the forced external load of different magnitudes, obtaining independent deformation expressions of all monitoring points, including: based on the actual deformation value corresponding to each monitoring point under the forced external load of different magnitudes, obtaining the coupling relationship between the actual deformation values ​​of each monitoring point, and using the inverse matrix of the modal matrix to decouple the actual deformation value of each monitoring point to obtain independent deformation expressions of all monitoring points;

[0055] Step S7, according to the independent deformation expression of each monitoring point and the deformation threshold of each monitoring point under different safety levels, the safety assessment criteria of each monitoring point are obtained to provide technical support for the safe use of historical buildings.

[0056] For example, the independent deformation expression of a monitoring point is a+b, and the deformation threshold of the monitoring point is <=6; then the safety assessment criterion for the monitoring point is: a+b<=6.

[0057] According to another aspect of the present invention, there is further provided a computer-readable storage medium having computer-executable instructions stored thereon, wherein when the computer-executable instructions are executed by a processor, the processor is enabled to: execute any of the methods described above.

[0058] According to another aspect of the present invention, there is also provided a computer device, comprising:

[0059] Processor; and

[0060] A memory arranged to store computer executable instructions, which when executed cause the processor to: perform any of the methods described above.

[0061] In summary, in view of the problem that there is no method for overall structural safety assessment through non-critical point monitoring data in the current structural safety assessment of historical buildings, the present invention proposes a method for structural safety assessment by combining numerical simulation analysis with non-critical point monitoring data, which provides technical support for structural safety assessment during daily use of historical buildings.

[0062] The present invention is applicable to situations where the sensor installation location is restricted by building protection during structural health monitoring of historical buildings. By adopting the present invention to perform structural safety assessment, the overall safety assessment of the structure can be performed through monitoring data of non-critical locations and numerical simulation analysis calculation results, thereby providing technical support for the safe operation of historical buildings.

[0063] The present invention is applicable to historical buildings where, due to restrictions on building protection requirements, monitoring sensors cannot be arranged at key points that affect structural safety, and overall structural safety assessment can only be performed through monitoring data from non-key points. The present invention provides technical support for structural safety assessment during daily use of historical buildings, thereby ensuring the safe and normal operation of historical buildings.

[0064] Specifically, the present invention achieves the following innovations:

[0065] 1) Calculate the structural safety assessment threshold by combining numerical simulation analysis with monitoring data;

[0066] 2) The stress state of the most unfavorable stress-bearing components is used as the basis for the safety assessment of historical building structures;

[0067] 3) Through the method of numerical simulation analysis, the relationship between the monitoring data of non-critical monitoring points and the stress state of the most unfavorable stress-bearing components is established;

[0068] 4) Decoupling the monitoring data through the modal matrix to obtain the expression of independent deformation of each monitoring point with the monitoring data as the independent variable;

[0069] 5) A method for overall structural safety assessment using non-critical point monitoring data is proposed.

[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0071] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0072] Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A structural safety assessment method, characterized in that: include: According to the requirements of building protection, determine the monitoring points arranged in the subsequent health monitoring of the building structure and the monitoring type corresponding to each monitoring point, wherein the monitoring points include: non-critical points; Conduct numerical simulation analysis on the building structure to be evaluated for structural safety, and calculate the initial stress and initial deformation values ​​of each monitoring point in the building structure under the action of the dead load alone; Obtain the most unfavorable component of the building structure; Based on the most unfavorable component of the building structure, the actual stress value and actual deformation value corresponding to each monitoring point are obtained; Based on the actual stress value and actual deformation value corresponding to each monitoring point, and the initial stress value and initial deformation value of each monitoring point, the deformation threshold of each monitoring point at different safety levels in the structural safety assessment is calculated; Based on the actual deformation value corresponding to each monitoring point under the action of forced external loads of different magnitudes, the independent deformation expressions of all monitoring points are obtained; According to the independent deformation expression of each monitoring point and the deformation threshold of each monitoring point under different safety levels, the safety assessment criterion of each monitoring point is obtained.

2. The structural safety assessment method according to claim 1, characterized in that: The monitoring type includes: one or any combination of vertical deformation, horizontal deformation, axial force, stress and strain.

3. The structural safety assessment method according to claim 1, characterized in that: Obtain the most unfavorable components of the building structure, including: Numerical simulation analysis software is used to calculate the current stress and deformation of the building structure under the simultaneous action of dead load and live load. Based on the current stress and deformation of the building structure, the most unfavorable components of the building structure under different working conditions are marked.

4. The structural safety assessment method according to claim 3, characterized in that: The different working conditions refer to the combination of the same dead load and different live loads.

5. The structural safety assessment method according to claim 3, characterized in that: Based on the most unfavorable component of the building structure, the actual stress value and actual deformation value corresponding to each monitoring point are obtained, including: In the numerical simulation analysis software, a forced external load corresponding to the monitoring type is applied to each monitoring point, and the different stress states of the most unfavorable component are used as indicators to load the forced external load, so as to determine the magnitude of the forced external load under different stress states of the most unfavorable component; and the actual force value and actual deformation value corresponding to each monitoring point under the action of forced external loads of different magnitudes are obtained.

6. The structural safety assessment method according to claim 5, characterized in that: The different stress states of the most unfavorable component are different percentage values ​​of the ultimate bearing capacity of the most unfavorable component.

7. The structural safety assessment method according to claim 5, characterized in that: Different safety levels in the structural safety assessment correspond to different stress states of the most unfavorable components.

8. The structural safety assessment method according to claim 1, characterized in that: Based on the actual deformation value corresponding to each monitoring point under the forced external load of different magnitudes, the independent deformation expressions of all monitoring points are obtained, including: Based on the actual deformation value corresponding to each monitoring point under the forced external load of different magnitudes, the coupling relationship between the actual deformation values ​​of each monitoring point is obtained, and the inverse matrix of the modal matrix is ​​used to decouple the actual deformation value of each monitoring point to obtain independent deformation expressions for all monitoring points.

9. A computer-readable storage medium having computer-executable instructions stored thereon, wherein: When the computer executable instructions are executed by a processor, the processor is caused to: perform the method according to any one of claims 1 to 8.

10. A computer device, wherein: include: processor; as well as A memory arranged to store computer executable instructions which, when executed, cause the processor to: perform a method as claimed in any one of claims 1 to 8.

Images