Structural design method adapting to temperature stress of shock insulation super-long structure

Abstract

The invention discloses a structural design method adapting to the temperature stress of a shock insulation super-long structure, and relates to the technical field of constructional engineering, comprising the following steps: step 1, analyzing the parameters of the shock insulation super-long structure; and carrying out structural analysis on the shock insulation super-long structure, wherein geometric parameters, material performance parameters and temperature change range parameters of the structure are determined. By arranging the sliding support and adopting temperature stress release measures such as flexible connection, the influence of temperature change on the structure can be effectively reduced, the temperature stress in the structure is reduced, meanwhile, by optimizing the arrangement of the shock insulation support and adjusting the rigidity of the shock insulation support, the shock insulation support can better adapt to structural deformation caused by temperature change, and the service life of the shock insulation support is prolonged. The shock insulation performance of the structure is improved; effective temperature control measures are adopted in the construction stage, and a long-term monitoring system is established in the use process, so that problems can be found and solved in time, and the safety and reliability of the structure are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and more particularly to a structural design method adapted to the temperature stress of a seismic isolation super-long structure. Background Art

[0002] It is well known that an over-long seismic isolation structure refers to a seismic isolation structure in which the length of the top plate or superstructure of the seismic isolation layer exceeds the length of the expansion joint specified in the corresponding specifications. During the design and construction, the influence of temperature stresses such as seasonal temperature and solar temperature difference on the seismic isolation layer and the superstructure must be considered. The seismic isolation bearing is the main component in the seismic isolation layer, which is allowed to deform without causing damage to the building. In buildings with seismic isolation layers, most of the damage caused by earthquake waves dissipates the seismic wave energy through the deformation of the seismic isolation layer. However, the deformation amplitude of the seismic isolation bearing is limited. If the initial deformation occurs due to factors other than the earthquake, the performance of the seismic isolation bearing will be significantly reduced when an earthquake occurs.

[0003] With the advancement of construction technology, ultra-long structures and seismic isolation techniques have become increasingly widely used in construction projects. However, when these two technologies are combined, the problem of temperature stress becomes particularly prominent. Factors such as temperature fluctuations and concrete shrinkage can easily cause deformation of seismic isolation bearings, thereby affecting the isolation effect and even threatening the safety of the structure. Ultra-long structures are also detrimental to building seismic isolation. Seismic isolation bearings can be significantly deformed not only by temperature fluctuations but also by concrete shrinkage during the pouring process, reducing their performance.

[0004] The Chinese invention patent, application number CN202410300908.8, filed on March 15, 2024, and titled "A Structural Design Method Adapting to Temperature Stress in Super-Long Seismic Isolation Structures," addresses this issue by first completing the construction of the structure below the isolation supports without installing them, thereby preventing deformation of the supports due to temperature changes and concrete shrinkage. The initial construction of the building is then completed in the form of a multi-tower structure, preventing deformation of the supports due to temperature changes and concrete shrinkage above the isolation supports. Furthermore, the temporary multi-tower structure is ensured to be stable and capable of being closed indoors by adjusting the width of the isolation temperature shrinkage band, providing docking structures at the edges of the post-cast multi-tower units, and providing temporary supports. Finally, the structure is closed at the average indoor temperature, preventing deformation of the isolation supports during closing. The combination of these features ensures that the isolation performance of the super-long seismic isolation structure will not be affected by temperature changes and concrete shrinkage during construction and use.

[0005] Existing technologies typically address thermal stress in ultra-long structures by installing expansion joints and post-cast strips. While these methods mitigate the effects of thermal stress to a certain extent, they remain inadequate for seismically isolated, ultra-long structures. For one thing, these methods cannot completely eliminate the impact of thermal stress on the isolation bearings; for another, installing expansion joints can also affect the building's functionality and aesthetics. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a structural design method that adapts to the temperature stress of ultra-long seismic isolation structures.

[0007] To achieve the above object, the present invention provides the following technical solutions: A structural design method adapted to the temperature stress of an ultra-long seismic isolation structure comprises the following steps: Step 1: Parameter analysis of the ultra-long seismic isolation structure; structural analysis of the ultra-long seismic isolation structure is performed, including determining the geometric parameters, material performance parameters and temperature variation range parameters of the structure, and then inputting each parameter into the finite element analysis software to calculate the structure to obtain the stress distribution under temperature variation; Step 2: Layout and adjustment of the ultra-long seismic isolation structure; based on the temperature stress calculation results, designing targeted temperature stress release measures, including setting sliding supports and adopting a flexible connection method, and at the same time adjusting the seismic isolation supports. The arrangement of the seismic isolation bearings is optimized, including increasing the number of seismic isolation bearings and adjusting the stiffness of the seismic isolation bearings; Step three: Construction phase of the super-long seismic isolation structure; Control the temperature during the construction phase to reduce the temperature stress during the concrete pouring process, install the seismic isolation bearings in stages, and integrate the temperature stress adjustment function in the seismic isolation bearings to reduce the impact of temperature stress on the seismic isolation bearings; Step four: Use phase of the super-long seismic isolation structure; Establish a long-term monitoring system to monitor the temperature changes, stress distribution and working status of the seismic isolation bearings in real time, and evaluate and adjust the performance of the structure based on the monitoring results.

[0008] Preferably, in step 2, the flexible connection includes a rubber connection and a spring connection, and is arranged at the connection position of the seismic isolation super-long structure to reduce the transmission of temperature stress.

[0009] Preferably, in step 2, a seismic isolation support filled with magnetorheological fluid is used, and the stiffness of the support is adjusted in real time by changing the magnetic field strength.

[0010] Preferably, in the step 2, the arrangement position of the isolation bearing is optimized, which also includes setting a hydraulic compensation device on the top of the isolation bearing; when it is monitored that the deformation of the isolation bearing due to temperature exceeds 10% of the design limit, the hydraulic compensation device automatically applies a reverse force to compensate for the displacement of the isolation bearing and maintain the stability of the horizontal stiffness of the isolation layer.

[0011] Preferably, in step 2, the number of seismic isolation supports is appropriately increased in areas with greater temperature stress.

[0012] Preferably, in step 4, the monitoring system includes a temperature sensor, a stress sensor, a displacement sensor, etc., which are used to monitor the temperature change, stress distribution and working status of the isolation bearing of the structure in real time.

[0013] Preferably, in the step 2, the stiffness of the seismic isolation support is adjusted according to the distribution of temperature stress, and the stiffness of the seismic isolation support at different positions is adjusted.

[0014] Preferably, in step 4, a fiber Bragg grating temperature sensor and a strain sensor are embedded on the top of the seismic isolation support to monitor temperature changes and structural stress in real time.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by setting sliding supports and adopting temperature stress release measures such as flexible connections, the impact of temperature changes on the structure can be effectively reduced, and the temperature stress inside the structure can be reduced. At the same time, by optimizing the layout of the isolation supports and adjusting the stiffness of the isolation supports, the isolation supports can better adapt to the structural deformation caused by temperature changes and improve the seismic isolation performance of the structure; taking effective temperature control measures during the construction phase and establishing a long-term monitoring system during use can timely discover and solve problems and enhance the safety and reliability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention proposes a flow chart of a structural design method that adapts to the temperature stress of an ultra-long seismic isolation structure. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Please refer to Figure 1As shown, the present invention proposes a structural design method for adapting to the temperature stress of a super-long seismic isolation structure, which includes the following steps: Step 1: Parameter analysis of the super-long seismic isolation structure; structural analysis of the super-long seismic isolation structure, including determining the geometric parameters, material performance parameters and temperature change range parameters of the structure, and then inputting each parameter into the finite element analysis software to calculate the structure to obtain the stress distribution under temperature change; Step 2: Layout and adjustment of the super-long seismic isolation structure; According to the temperature stress calculation results, design targeted temperature stress release measures, including setting sliding supports and adopting flexible connection methods, and at the same time The arrangement of the isolation bearings is optimized, including increasing the number of isolation bearings and adjusting the stiffness of the isolation bearings; Step three: The construction phase of the super-long isolation structure; The temperature during the construction phase is controlled to reduce the temperature stress during the concrete pouring process. At the same time, the isolation bearings are installed in stages, and the temperature stress adjustment function is integrated into the isolation bearings to reduce the impact of temperature stress on the isolation bearings; Step four: The use phase of the super-long isolation structure; A long-term monitoring system is established to monitor the temperature changes, stress distribution and working status of the isolation bearings of the structure in real time, and the performance of the structure is evaluated and adjusted based on the monitoring results.

[0019] In the present invention, in step 2, the flexible connection includes a rubber connection and a spring connection, and is provided at the connection position of the ultra-long seismic isolation structure to reduce the transmission of thermal stress. In step 2, the seismic isolation support filled with magnetorheological fluid is used, and the support stiffness is adjusted in real time by changing the magnetic field strength.

[0020] It should be noted that in the step 2, the layout position of the isolation bearing is optimized, which also includes setting a hydraulic compensation device on the top of the isolation bearing; when it is monitored that the deformation of the isolation bearing due to temperature exceeds 10% of the design limit, the hydraulic compensation device automatically applies a reverse force to compensate for the displacement of the isolation bearing and maintain the horizontal stiffness of the isolation layer. In the step 2, the number of isolation bearings is appropriately increased in areas with greater temperature stress. It should be noted that the specific number of isolation bearings is increased according to the area with greater temperature stress. The purpose of its setting is to be able to perform seismic isolation treatment on areas with greater temperature stress.

[0021] In this embodiment, in step 4, the monitoring system includes a temperature sensor, a stress sensor, and a displacement sensor, etc., which are used to monitor the temperature changes, stress distribution, and working status of the seismic isolation support in real time. A temperature sensor is provided to detect the temperature inside the seismic isolation super-long structure, a stress sensor is provided to detect the stress inside the seismic isolation super-long structure, and a displacement sensor is provided to detect the displacement inside the seismic isolation super-long structure. In this way, by detecting the above three types of data, the stability of the seismic isolation super-long structure during use is improved, and if any data abnormality occurs, the seismic isolation super-long structure can be adjusted in a timely manner.

[0022] In the step 2, the stiffness of the isolation support is adjusted at different positions according to the distribution of temperature stress.

[0023] In the fourth step, a fiber grating temperature sensor and a strain sensor are embedded on the top of the seismic isolation support to monitor temperature changes and structural stress in real time.

[0024] Working principle: Step 1: Parameter analysis of the seismically isolated super-long structure: Structural analysis of the super-long seismic isolation structure is performed, including determining the geometric parameters, material performance parameters, and temperature variation range parameters of the structure. These parameters are then input into finite element analysis software to calculate the structure and determine the stress distribution under temperature changes. Step 2: Layout and adjustment of the extra-long seismic isolation structure. Based on the temperature stress calculation results, design targeted temperature stress relief measures, including setting up sliding supports and adopting flexible connections. At the same time, optimize the layout of the seismic isolation supports, including increasing the number of isolation supports and adjusting the stiffness of the isolation supports. Step 3: Construction of the seismically isolated, ultra-long structure: Temperature control is performed during the construction phase to reduce thermal stress during concrete pouring. Seismic isolation bearings are installed in stages, and temperature stress adjustment functions are integrated into the bearings to reduce the impact of temperature stress on them. Step 4: Use phase of the super-long seismic isolation structure; establish a long-term monitoring system to monitor the temperature changes, stress distribution and working status of the seismic isolation bearings in real time, and evaluate and adjust the performance of the structure based on the monitoring results.

[0025] Although the preferred embodiments of the present invention have been described above, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0026] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A structural design method adapted to the temperature stress of an ultra-long seismic isolation structure, characterized in that: The steps include: Step 1: Parameter analysis of super-long seismic isolation structure Conducting structural analysis on the seismically isolated super-long structure, including determining the structure's geometric parameters, material performance parameters, and temperature variation range parameters. These parameters are then input into finite element analysis software to calculate the structure and determine the stress distribution under temperature variations. Step 2: Layout and adjustment of super-long seismic isolation structures Based on the temperature stress calculation results, targeted temperature stress relief measures are designed, including setting sliding supports and adopting flexible connections. At the same time, the layout of the seismic isolation supports is optimized, including increasing the number of seismic isolation supports and adjusting the stiffness of the seismic isolation supports. Step 3: Construction phase of seismic isolation super-long structure Temperature control during the construction phase was implemented to reduce thermal stress during concrete pouring. Seismic isolation bearings were installed in stages, and temperature stress adjustment functions were integrated into the bearings to reduce the impact of temperature stress on the bearings. Step 4: Use stage of seismic isolation super-long structure Establish a long-term monitoring system to monitor the temperature changes, stress distribution and working status of the seismic isolation bearings of the structure in real time, and evaluate and adjust the performance of the structure based on the monitoring results.

2. A structural design method for adapting to temperature stress of ultra-long seismic isolation structures according to claim 1, characterized in that: In the step 2, the flexible connection includes a rubber connection and a spring connection, and is arranged at the connection position of the seismic isolation super-long structure to reduce the transmission of temperature stress.

3. The structural design method for adapting to the temperature stress of an ultra-long seismic isolation structure according to claim 2 is characterized in that: In the second step, a seismic isolation support filled with magnetorheological fluid is used, and the stiffness of the support is adjusted in real time by changing the magnetic field strength.

4. The structural design method for adapting to the temperature stress of an ultra-long seismic isolation structure according to claim 3 is characterized in that: In the second step, the layout position of the isolation bearing is optimized, which also includes setting a hydraulic compensation device on the top of the isolation bearing; when it is monitored that the deformation of the isolation bearing due to temperature exceeds 10% of the design limit, the hydraulic compensation device automatically applies a reverse force to compensate for the displacement of the isolation bearing and maintain the horizontal stiffness of the isolation layer stable.

5. The structural design method for adapting to the temperature stress of an ultra-long seismic isolation structure according to claim 4 is characterized in that: In the second step, the number of seismic isolation supports is appropriately increased in areas with greater temperature stress.

6. The structural design method for adapting to the temperature stress of an ultra-long seismic isolation structure according to claim 5 is characterized in that: In the step 4, the monitoring system includes temperature sensors, stress sensors, displacement sensors, etc., which are used to monitor the temperature changes, stress distribution and working status of the isolation bearings of the structure in real time.

7. The structural design method for adapting to the temperature stress of an ultra-long seismic isolation structure according to claim 6 is characterized in that: In the step 2, the stiffness of the isolation support is adjusted at different positions according to the distribution of temperature stress.

8. The structural design method for adapting to the temperature stress of an ultra-long seismic isolation structure according to claim 6 is characterized in that: In the fourth step, a fiber grating temperature sensor and a strain sensor are embedded on the top of the seismic isolation support to monitor temperature changes and structural stress in real time.

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