Auxiliary steel frame for overall structure fire resistance test

Abstract

The invention discloses an auxiliary steel frame for a fire resistance test of an integral structure, which comprises a base module, vertical support modules and a longitudinal support module, the vertical support modules are symmetrically arranged, and the two ends of the vertical support modules are respectively matched with the base module and the longitudinal support module; and the vertical supporting modules and the longitudinal supporting modules are modularly connected through adjustable connecting structures. According to the scheme, through the modular design, the steel frame is easy to transport and fast to install, and the test arrangement time is shortened; and meanwhile, by adopting an adjustable structure and diversified combination, different types of fire resistance test requirements are met.

Description

Technical Field

[0001] The invention relates to the technical field of building structure test equipment, and in particular to an auxiliary steel frame used for an integral structure fire resistance test. Background Art

[0002] In the field of construction engineering, the fire resistance of structures is one of the important factors affecting the safety of buildings. The overall structural fire resistance test is a key test method that aims to simulate the stress, deformation and damage of building structures under fire conditions and evaluate their stability and safety in high temperature environments. However, when conducting such tests, it is usually necessary to set up an auxiliary steel frame support structure outside the test structure to ensure that the test detection requirements are met and the test sensors can be in an absolutely static state to facilitate the scientific and accurate acquisition of test data.

[0003] The traditional fire resistance test auxiliary steel frame has the following main problems:

[0004] 1. Heavy weight and inconvenient to move: Traditional auxiliary steel frames are usually made of solid steel. Although they have high strength, they are heavy overall and inconvenient to move.

[0005] 2. Complex assembly and lack of modular design: Traditional steel frames are generally fixed structure designs, lack modular components, and are difficult to flexibly adapt to tested structures of different sizes and forms, reducing the applicability and reuse rate of steel frames.

[0006] (3) Inconvenience in installing sensors: In the fire resistance test of the overall structure, it is necessary to arrange a variety of sensors such as displacement meters, thermometers and stress sensors. However, there is often a lack of fixed positions and protective measures, making it difficult to accurately monitor the thermal deformation and stress conditions of the structure.

[0007] (4) Lack of high temperature protection design: The fire test environment temperature is high, often exceeding the bearing range of the steel frame material, causing the steel frame to deform or be damaged under high temperature, affecting the test support effect. At the same time, traditional steel frames do not use high temperature resistant materials or protective coatings, and are prone to corrosion and aging under high temperature conditions, reducing their service life.

[0008] In summary, the auxiliary steel frame for fire resistance test in the prior art cannot meet the needs of actual fire resistance test well. Therefore, there is a need for an auxiliary steel frame that is lightweight, high-strength, modular, adjustable, easy to install sensors and has high-temperature protection performance to improve the efficiency of the test and the accuracy of the data. Summary of the invention

[0009] In view of the technical problem that the existing fire test auxiliary steel frame has low reliability due to the above-mentioned technical problems, the purpose of the present invention is to provide an auxiliary steel frame for the overall structure fire resistance test, which is a modular, lightweight, high-strength, adjustable and sensor-friendly overall structure fire resistance test auxiliary steel frame, which significantly improves the experimental performance and data reliability of the overall structure fire resistance test and effectively overcomes the problems existing in the prior art.

[0010] In order to achieve the above-mentioned objectives, the present invention provides an auxiliary steel frame for an integral structural fire resistance test, comprising a base module, a vertical support module and a longitudinal support module, wherein the vertical support module is symmetrically arranged and the two ends are respectively coordinated with the base module and the longitudinal support module, and the base module, the vertical support module and the longitudinal support module are modularly connected through an adjustable connection structure.

[0011] Furthermore, the vertical support module is symmetrically arranged and vertically arranged relative to the base module. The vertical support module includes at least one group of vertical support segments. Each group of vertical support segments is stacked and connected. The bottom group of vertical support segments is connected to the base module and locked to the base module through an adjustable connection structure.

[0012] Furthermore, each group of vertical support segments includes a pair of vertical columns and a transverse column, wherein the pair of vertical columns are symmetrically arranged, the transverse column is arranged between the pair of vertical columns and both ends are respectively connected to the ends of the vertical columns. A group of vertical scissor braces is arranged between the pair of vertical columns.

[0013] Furthermore, the transverse column and the vertical scissors brace are retractable structures.

[0014] Furthermore, a plurality of mounting holes for mounting displacement sensors are distributed on the component parts of the vertical support module.

[0015] Furthermore, the longitudinal support module is arranged horizontally relative to the base module and spans above the vertical support module. The longitudinal support module includes at least one group of longitudinal support segments, each group of longitudinal support segments are arranged in sequence and connected, and the longitudinal support segments located at both ends are connected to the vertical support module through an adjustable connection structure.

[0016] Furthermore, each group of longitudinal support segments includes at least one pair of transverse beams and a horizontal beam, the pair of transverse beams are symmetrically arranged, the horizontal beam is arranged between the pair of transverse beams and the two ends are respectively connected to the ends of the transverse beams, and a group of transverse scissors braces are arranged between the transverse beams.

[0017] Furthermore, the horizontal beams and scissor braces in the longitudinal support segment are both retractable structures.

[0018] Furthermore, a plurality of mounting holes for mounting temperature sensors are evenly distributed on the auxiliary steel frame.

[0019] Furthermore, a fireproof layer is provided on the periphery of the auxiliary steel frame.

[0020] The auxiliary steel frame for the fire resistance test of the integral structure provided by the present invention makes the steel frame easy to transport and quickly install through modular design and the application of light and high-strength materials, thereby reducing the test arrangement time.

[0021] Secondly, the structure reserves installation holes specifically for sensors to ensure the accuracy of data collection.

[0022] At the same time, by adopting adjustable structures and diversified combinations, different types of fire resistance test needs can be met.

[0023] In addition, the structure ensures the long-term stability of the steel frame under high temperature conditions through the design of high-temperature resistant coating and protective plate, reducing equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of the overall structure of the auxiliary steel frame used for the overall structure fire resistance test;

[0026] Figure 2 It is a structural schematic diagram of the vertical support module and the longitudinal support module in the auxiliary steel frame after connection and adjustment;

[0027] Figure 3 This is a structural diagram of the base in the base module of the auxiliary steel frame;

[0028] Figure 4 This is a schematic diagram of the structure of the roller in the base module of the auxiliary steel frame;

[0029] Figure 5 This is a structural diagram of the vertical support module in the auxiliary steel frame before extension and retraction;

[0030] Figure 6 This is a schematic diagram of the structure after the vertical support module in the auxiliary steel frame is extended and retracted;

[0031] Figure 7 This is a structural diagram of the longitudinal support module in the auxiliary steel frame before extension and retraction;

[0032] Figure 8 This is a schematic diagram of the structure after the longitudinal support module in the auxiliary steel frame is extended and retracted;

[0033] Fig. 9 This is a schematic diagram of the telescopic structure in this auxiliary steel frame.

[0034] The following is a description of the components in the accompanying drawings:

[0035] 100. Base module 110. Base 120. Roller 200. Vertical support module 210. Vertical support segment 211. Vertical column 212. Horizontal column 2121. Inner sleeve 2122. Outer sleeve 2123. Pin hole 213. Vertical scissors brace 300. Longitudinal support module 310. Longitudinal support segment 311. Horizontal beam 312. Horizontal beam 313. Horizontal scissors brace. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0037] In view of the technical problem that the existing fire test auxiliary steel frame has low reliability due to the above-mentioned technical problems, the present invention provides an auxiliary steel frame for the overall structure fire resistance test, which is a modular, lightweight, high-strength, adjustable and sensor-friendly overall structure fire resistance test auxiliary steel frame, which significantly improves the experimental performance and data reliability of the overall structure fire resistance test.

[0038] The auxiliary steel frame provided by the present invention for the fire resistance test of the integral structure is shown in Figure 1-Figure 2 , which includes a base module 100, a vertical support module 200 and a longitudinal support module 300. The vertical support module 200 is connected to the base module 100 through an adjustable connection structure. The longitudinal support module 300 spans over the vertical support module 200 and is connected to the vertical support module 200 through an adjustable connection structure. The modules form a modular structure through the adjustable connection structure. The connection between the modules is designed to be adjustable and has a quick-release function. It can be flexibly combined according to the test requirements to adapt to the tested structures of different sizes and shapes. The modular design is convenient for transportation, storage and quick installation at the test site, effectively improving the efficiency of the test layout.

[0039] The adjustable connection structure here uses a combination of bolts, locks and slots to ensure fast installation and disassembly while maintaining the stability and security of the connection.

[0040] The base module 100 includes a plurality of bases 110, and the bases 110 are symmetrically arranged. Figure 3 Each base 110 is provided with a connection hole, and the matching connection piece can fix and disassemble the base module 100 and the test area.

[0041] Secondly, the base module 100 can be configured as a mobile support structure, see Figure 4 The position is adjusted by a roller 120 or a slide rail with a locking device, which facilitates flexible arrangement of the experimental site.

[0042] Since the base module 100 is the supporting base of the entire steel frame, the base module 100 is preferably made of high-strength steel or aluminum alloy, which has sufficient heat resistance and strength.

[0043] The end of the base module 100 is provided with a T-shaped slot for connecting with the vertical support module. Figure 5 The vertical support module 200 includes at least one group of vertical support segments 210, each group of vertical support segments 210 is stacked and connected, and the bottom group of vertical support segments 210 is connected to the base module 100 and locked with the base module 100 through an adjustable connection structure.

[0044] Each group of vertical support segments 210 includes a pair of vertical columns 211 and a transverse column 212. The pair of vertical columns 211 are symmetrically arranged, and telescopic slide grooves are provided at the connecting ends of the vertical columns. The transverse column 212 is arranged between the two vertical columns 211, and both ends are respectively connected to the slide grooves at the ends of the vertical columns 211. A group of vertical scissor braces 213 is arranged between the pair of vertical columns 211, and the vertical scissor braces 213 are arranged to increase the overall strength and anti-deformation ability of the steel frame.

[0045] A T-shaped plug-in component is provided at the bottom connection node between the vertical column 211 in the vertical support module 200 and the vertical scissors strut 213, which matches the T-shaped slot on the base module 100. By docking the T-shaped plug-in component at the bottom of the vertical support module 200 with the T-shaped slot on the base module 100, the mating connection between the vertical support module 200 and the base module 100 is achieved.

[0046] Furthermore, the inner wall of the T-slot has a positioning groove, which has a self-locking function after being inserted into place. When the vertical support module 200 is inserted into the T-slot of the base, it is automatically locked to prevent accidental loosening. The combination of the slide groove and the positioning hole ensures that there is no risk of displacement of the connection part after the adjustment is completed, so as to improve the assembly accuracy and stability.

[0047] A lock buckle is arranged around the T-shaped card slot, and when the T-shaped plug-in component at the bottom of the vertical support module is plugged into the T-shaped card slot on the base module, it is locked by the lock buckle.

[0048] At the same time, the slide grooves on the base module 100 cooperate with the bolt holes to adjust the position of the vertical support module 200 to meet the requirements of different test sizes.

[0049] At the connection between the vertical support module 200 and the base module 100, the angle can be fine-tuned by rotating the bottom connection component. The lock and bolt locking are combined to ensure the accurate positioning of the test structure.

[0050] Further, see Figure 6-Figure 7The transverse column 212 in the vertical support segment 210 is a retractable structure, and the connecting end of the transverse column is connected to the slide groove of the vertical column to ensure that the connecting part has good free retractability.

[0051] As an example, the telescopic design of the transverse column 212 is composed of an inner and outer sleeve. The outer sleeve 2122 is fixed to the vertical support column 211 (or other structural members), and the inner sleeve 2121 can slide up and down in the outer sleeve 2122, allowing the length of the transverse column 212 to be adjusted.

[0052] A locking pin hole 2123 is provided between the inner and outer sleeves to ensure that the transverse column 212 has sufficient stability after extension and contraction to prevent displacement during the test.

[0053] An adjustment knob or locking rod is provided at the joint of the inner and outer sleeves. The rotation of the knob can drive the locking pin to precisely mate with the hole to ensure that the transverse column is fixed in the required position. The locking rod is fixed in the locking position by a latch or buckle to ensure that it does not loosen or misalign.

[0054] At the same time, the vertical scissors brace 213 is a telescopic structure, and the connecting end of the vertical scissors brace 213 is connected to the slide groove of the vertical column to ensure that the connecting part has good free telescopic properties. The vertical scissors brace 213 has the same telescopic structure as the horizontal column 212, and is composed of an inner and outer sleeve, so that it can adjust its length according to actual needs.

[0055] In addition to adjusting the longitudinal length, the angle of the vertical scissors support 213 can also be achieved by adjusting the angle knob. The knob cooperates with the angle gear to adjust the angle of the scissors support when rotating, ensuring that the support frame adapts to different geometric shapes in different tests.

[0056] At the same time, a pressure-resistant reinforcement pad is provided at the end of the vertical scissors support 213 to disperse the load and reduce the burden on the node.

[0057] Furthermore, a number of mounting holes are distributed on the component parts of the vertical support module 200. The mounting holes are used to install displacement sensors, which are used to monitor the deformation of the structure under test. The displacement sensors are firmly fixed through the mounting holes to ensure the accuracy of the test data.

[0058] According to the test requirements, the mounting holes are evenly distributed in the key component parts of the vertical support module, such as the beam connection nodes, the middle section and the top area of ​​the vertical column, to ensure that the deformation key points of the measured structure are covered. The mounting holes are standardized circular or elliptical holes with threads or nested grooves designed around the holes for fixed installation.

[0059] A high-performance heat-insulating sleeve is set on the inner wall of the installation hole. Preferably, it can be made of ceramic fiber or high-temperature resistant silicone rubber material. The inner surface of the sleeve is smooth, which is convenient for sensor installation and isolates the direct conduction of high temperature to the sensor.

[0060] At the same time, a fire-resistant coating is applied around the installation hole. Preferably, an inorganic silicate coating can be used to provide additional heat shielding effect to prevent the metal material around the hole from expanding due to high temperature and affecting the sensor positioning.

[0061] The mounting base of the displacement sensor is fixed in the mounting hole by threaded connection or snap-on connection, and the sensor connecting wire is built into the mounting hole to avoid exposure and reduce the risk of high temperature or mechanical damage.

[0062] After installation, the displacement sensor is covered with a heat-insulating protective shell, and the material is preferably a high-temperature resistant composite material (such as a ceramic-based composite material) to ensure the normal operation of the electronic components inside the sensor in a high-temperature environment.

[0063] The longitudinal support module 300 is disposed transversely to the base module 100 and spans over the vertical support module 200 to support and fix the structure. Figure 8 The longitudinal support module 300 includes at least one group of longitudinal support segments 310, each group of longitudinal support segments 310 is arranged in sequence and connected, and the longitudinal support segments 310 located at both ends are connected to the vertical support module 200 through an adjustable connection structure.

[0064] Each set of longitudinal support segments 310 includes at least one pair of transverse beams 311 and a horizontal beam 312. The pair of transverse beams 311 are symmetrically arranged, and the horizontal beam 312 is arranged between the pair of transverse beams 311 and has two ends connected to the ends of the transverse beams 311 respectively.

[0065] A set of transverse scissor braces 313 is provided between the transverse beams 311 , and the transverse scissor braces 313 are provided to increase the overall strength and anti-deformation capability of the steel frame.

[0066] L-shaped slots are designed at both ends of the top transverse beam 311, and adjustable slide rails and plug-in components are set on the top of the vertical support module 200. When connected, the plug-in components are combined with the L-shaped slots, and the horizontal position of the top transverse beam 311 is adjusted through the slide rails. Combined with bolt fixing and lock buckle reinforcement, the shear and bending resistance of the node under the test load is guaranteed.

[0067] Among them, see Fig. 9 The horizontal beam 312 and the transverse scissor support 313 in the longitudinal support segment 310 are both retractable structures, which can be retracted along the support direction. The height and angle of the assembly can be controlled by a knob or a locking rod, thereby ensuring that the steel frame can be adapted to different sizes and shapes of measured structures.

[0068] The telescopic structure of the horizontal beam 312 and the horizontal scissors brace 313 here is the same as the horizontal column 212 and the vertical scissors brace 213 in the above-mentioned vertical support module, and will not be described in detail here.

[0069] The auxiliary steel frame formed by the above-mentioned base module 100, vertical support module 200 and longitudinal support module 300 has temperature sensor installation holes evenly distributed on the surface of each module, which is convenient for measuring the temperature changes of the steel frame and the surface of the measured structure at different heights and positions, ensuring the comprehensiveness of data collection under fire conditions.

[0070] At the same time, in order to facilitate the expansion of test needs, the steel frame reserves multiple spare sensor holes, which can be used to install other sensors such as pressure and stress.

[0071] The setting scheme for the temperature sensor and the backup sensor here is consistent with the setting method of the displacement sensor mentioned above, and will not be described in detail here.

[0072] Secondly, in order to increase the stability of the steel frame in a high temperature environment, it is preferred that the surface of each component is coated with a refractory material, and a high temperature resistant protective plate may be added.

[0073] Among them, the refractory material can preferably be a high-temperature resistant ceramic coating or a special fire-retardant coating, so that the steel frame can maintain structural integrity near a high-temperature fire source and avoid deformation or damage of the steel frame due to high temperature.

[0074] In addition, in order to reduce the weight of the steel frame and ensure its strength in a high temperature environment, the steel frame constructed in this solution is made of high-strength aluminum alloy and composite materials.

[0075] Aluminum alloy has good corrosion resistance and high temperature resistance, which is suitable for the special needs of fire tests. Composite materials such as carbon fiber composite materials not only have high strength, but also show good stability under large temperature fluctuations, ensuring the reliability of the steel frame during the entire test.

[0076] Based on the auxiliary steel frame for the overall structure fire resistance test constructed by the above scheme, the following examples illustrate the assembly steps in specific applications. The assembly process of the steel frame of the present invention is simple and convenient for rapid on-site construction, and includes the following steps:

[0077] (1) Base module layout: Place the base module in a suitable position and adjust its orientation using the rollers. Lock the base module to stabilize it on the ground.

[0078] (2) Vertical support module installation: Insert the vertical support module into the connection part of the base module, and use the adjustable structure to adjust the height and angle to match the structure to be measured.

[0079] (3) Fixing of longitudinal support modules: Connect the longitudinal support modules to the vertical support modules, ensure that they span above the structure, and install quick-release devices to fix the crossbeams.

[0080] (4) Sensor installation: Install the displacement sensor, temperature sensor, etc. into the reserved holes, ensure that the sensor is stably fixed, and connect it to the data acquisition system.

[0081] (5) Inspection and adjustment: Check whether the connection parts of the entire steel frame are firm and whether the sensor is installed properly, and make final height and angle adjustments as needed.

[0082] The present invention provides a convenient, efficient and durable fire resistance test auxiliary steel frame, which significantly improves the experimental performance and data reliability of the overall structure fire resistance test.

[0083] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An auxiliary steel frame for fire resistance test of an integral structure, characterized in that: It includes a base module, a vertical support module and a longitudinal support module. The vertical support module is symmetrically arranged and the two ends are respectively matched with the base module and the longitudinal support module. The base module, the vertical support module and the longitudinal support module are modularly connected through an adjustable connection structure.

2. The auxiliary steel frame for fire resistance test of an integral structure according to claim 1, characterized in that: The vertical support module is symmetrically arranged and vertically arranged relative to the base module. The vertical support module includes at least one group of vertical support segments. Each group of vertical support segments is stacked and connected. The bottom group of vertical support segments is connected to the base module and locked with the base module through an adjustable connection structure.

3. The auxiliary steel frame for fire resistance test of an integral structure according to claim 2, characterized in that: Each group of vertical support segments includes a pair of vertical columns and a transverse column, wherein the pair of vertical columns are symmetrically arranged, and the transverse column is arranged between the pair of vertical columns and the two ends of the transverse column are respectively connected to the ends of the vertical columns. A group of vertical scissor braces is arranged between the pair of vertical columns.

4. The auxiliary steel frame for fire resistance test of an integral structure according to claim 3, characterized in that: The transverse column and the vertical scissors support are retractable structures.

5. The auxiliary steel frame for fire resistance test of an integral structure according to claim 1, characterized in that: A plurality of mounting holes for mounting displacement sensors are distributed on the component parts of the vertical support module.

6. The auxiliary steel frame for fire resistance test of an integral structure according to claim 1, characterized in that: The longitudinal support module is arranged horizontally relative to the base module and spans above the vertical support module. The longitudinal support module includes at least one group of longitudinal support segments. Each group of longitudinal support segments is arranged in sequence and connected. The longitudinal support segments located at both ends are connected to the vertical support module through an adjustable connection structure.

7. The auxiliary steel frame for the fire resistance test of the integral structure according to claim 6, characterized in that: Each group of longitudinal support segments includes at least one pair of transverse beams and a horizontal cross beam. The pair of transverse beams are symmetrically arranged. The horizontal cross beam is arranged between the pair of transverse beams and its two ends are respectively connected to the ends of the transverse beams. A group of transverse scissors struts are arranged between the transverse beams.

8. The auxiliary steel frame for fire resistance test of an integral structure according to claim 7, characterized in that: The horizontal beams and scissors struts in the longitudinal support segments are both retractable structures.

9. The auxiliary steel frame for overall structural fire resistance test according to claim 1, characterized in that: The auxiliary steel frame is evenly distributed with a number of mounting holes for mounting temperature sensors.

10. The auxiliary steel frame for fire resistance test of an integral structure according to claim 1, characterized in that: A fireproof layer is arranged on the periphery of the auxiliary steel frame.

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