Building seismic isolation rubber bearing fire resistance testing machine

Abstract

The present invention discloses a fire resistance performance testing machine for building seismic isolation rubber bearings, which belongs to the technical field of building engineering detection. The machine comprises a gantry, a hydraulic press, a combustion chamber, an upper pier and a lower pier. The gantry is fixedly mounted on a concrete foundation by expansion bolts, the hydraulic press is fixedly mounted on the crossbeam of the gantry, the lower pier is supported on the ground of the combustion chamber, the test seismic isolation rubber bearing is mounted on the lower pier, and the upper pier is mounted on the test seismic isolation rubber bearing. A wellhead is provided on the top of the combustion chamber just below the hydraulic press, an asbestos fireproof layer is laid around the wellhead, a plug is provided in the wellhead, and the plug The plug includes an inner spherical joint bearing and an asbestos fireproof layer wrapped around the periphery and bottom of the spherical joint bearing. At least 4 temperature sensors A, 2 flamethrowers, and a smoke exhaust port are installed in the combustion chamber. The hydraulic press applies a vertical load to the seismic isolation rubber bearing through the plug and the upper pier. The flamethrower simulates combustion, and the temperature sensor A collects the temperature of the combustion chamber in real time during the test process, safely and reliably realizing the fire resistance performance test of the building seismic isolation rubber bearing, providing special equipment for the implementation of the local standard DBJ53 / T-47-2020 "Performance and Inspection Standard of Laminated Rubber Isolation Bearings for Construction Engineering".

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering detection. Background Art

[0002] The national standard does not stipulate the fire resistance performance test of building seismic isolation rubber bearings, but many places need to take fire prevention measures for seismic isolation rubber bearings. For this reason, the Yunnan Provincial Engineering Construction Department has formulated the local standard DBJ53 / T-47-2020 "Performance and Inspection Standards for Laminated Rubber Isolation Bearings in Construction Projects", which stipulates that when the seismic isolation layer has fire prevention requirements, 1. Fire prevention measures do not hinder the deformation of the seismic isolation rubber bearings; 2. Provide a fire resistance test report of the seismic isolation rubber bearing that burns for not less than 3 hours when fire prevention measures are taken under vertical loading; 3. Provide a test report on the vertical mechanical properties and horizontal mechanical properties of the seismic isolation rubber bearing after 3 hours of the burning test, and the change rate of the compression performance and horizontal detection performance shall not exceed 15%.

[0003] Yunnan National Testing Holding Group Co., Ltd., as the national building materials industry seismic isolation product quality supervision and inspection center, has invented a building seismic isolation rubber bearing fire resistance tester to adapt to the application of the new standards. The appearance diagram is attached. Figure 1 and Figure 2 After use, the testing machine can safely and efficiently complete the fire resistance performance test of building seismic isolation rubber bearings. Summary of the Invention

[0004] The purpose of the present invention is to provide a fire resistance performance testing machine for building seismic isolation rubber bearings, so as to realize the fire resistance performance testing of building seismic isolation rubber bearings.

[0005] The fire resistance performance testing machine for building seismic isolation rubber bearings of the present invention comprises a gantry, a hydraulic press, a combustion chamber, an upper pier and a lower pier. The gantry is fixedly mounted on a concrete foundation by expansion bolts. The hydraulic press is fixedly mounted on the crossbeam of the gantry. The hydraulic press is used to apply a vertical load to the seismic isolation rubber bearing. The combustion chamber is located in the door frame of the gantry. The combustion chamber is constructed of refractory materials. A fire door is provided on the front of the combustion chamber. A wellhead is provided on the top of the combustion chamber. A fireproof asbestos layer is laid around the wellhead. A plug is provided, which is located directly below the hydraulic press. The plug includes an inner ball joint support and a fireproof asbestos layer wrapped around the periphery and bottom of the ball joint support. At least 4 temperature sensors A, 2 flamethrowers, and a smoke exhaust port are provided in the combustion chamber; the upper pier and the lower pier are concrete piers, the lower pier is supported on the ground of the combustion chamber, the test seismic isolation rubber support is installed on the lower pier, and the upper pier is installed on the test seismic isolation rubber support. The outer periphery of the upper pier and the lower pier is wrapped with fireproof material.

[0006] When in use, open the fire door, use a forklift or crane to install the lower pier to the floor of the combustion chamber, then install the test seismic isolation rubber bearing on the lower pier, and then install the upper pier on the test seismic isolation rubber bearing. The outer periphery of the upper and lower piers is wrapped with fire-resistant cloth. Close the fire door, start the hydraulic press to press the plug down and apply a vertical load to the seismic isolation rubber bearing. The fireproof asbestos layer of the plug and the fireproof asbestos layer laid around the wellhead are kept sealed. The temperature sensor A is powered on, the flamethrower is ignited, and the temperature changes in the combustion chamber are recorded by each temperature sensor A. The changes in compression during the test are recorded by the downward movement of the hydraulic press piston rod. After three hours of burning, the hydraulic press is unloaded. After the temperature in the combustion chamber drops, open the fire door, take out the upper pier, test seismic isolation rubber bearing, and lower pier in turn, open the fireproof layer of the test seismic isolation rubber bearing, check whether the seismic isolation rubber bearing is intact, and complete the fire resistance test.

[0007] Furthermore, in order to timely monitor the surface temperature of the seismic isolation rubber bearing, more than three temperature sensors B are included. Each temperature sensor B is evenly distributed on the rubber surface of the test seismic isolation rubber bearing, and the connecting cable of the temperature sensor B is wrapped with fireproof material for protection.

[0008] Furthermore, in order to facilitate monitoring of temperature parameters, a controller is also included for collecting measurement values ​​of each temperature sensor A and temperature sensor B.

[0009] Furthermore, in order to detect the plane deviation of the seismic isolation rubber bearing during the test, four compression measuring devices are also included, which are evenly distributed on the periphery of the seismic isolation rubber bearing. The compression measuring device includes a top rod arranged on the lower pier, a sleeve arranged on the upper pier, and a lifting rod arranged in the sleeve. The sleeve is provided with an internal thread, and the lower end of the lifting rod is provided with an external thread that cooperates with the internal thread of the sleeve. The helix angle of the thread is 10°~12°. A groove is provided in the lower half of the lifting rod to divide the lower half of the lifting rod into two halves. After the upper pier, the seismic isolation rubber bearing, and the lower pier are installed as a whole, the top rod is inserted into the sleeve and pressed against the lower end of the lifting rod. When in use, a depth gauge or a laser ranging device is used to measure the height between the top of the lifting rod and the top of the sleeve before and after the test to obtain four compressions of the periphery of the seismic isolation rubber bearing. The four compressions are compared to obtain the plane deviation.

[0010] Furthermore, in order to reliably seal the plug and the wellhead and avoid tearing of the fireproof layer, the fireproof asbestos layer wrapped around the ball joint support is arranged into an arc tooth shape with the same tooth pitch, and the fireproof asbestos layer laid around the wellhead is also arranged into an arc tooth shape with the tooth pitch gradually increasing from bottom to top.

[0011] The fire resistance performance testing machine for building seismic isolation rubber bearings of the present invention comprises a gantry, a hydraulic press, a combustion chamber, an upper pier, and a lower pier. The gantry is fixedly mounted on a concrete foundation by expansion bolts, the hydraulic press is fixedly mounted on the crossbeam of the gantry, the lower pier is supported on the ground of the combustion chamber, the test seismic isolation rubber bearing is mounted on the lower pier, and the upper pier is mounted on the test seismic isolation rubber bearing. A wellhead is provided on the top of the combustion chamber just below the hydraulic press, an asbestos fireproof layer is laid around the wellhead, and a plug is provided in the wellhead. The plug includes an inner ball joint bearing. And the asbestos fireproof layer wrapped around the periphery and bottom of the spherical joint bearing, at least 4 temperature sensors A, 2 flamethrowers, and a smoke exhaust port are installed in the combustion chamber, and the hydraulic press applies vertical load to the seismic isolation rubber bearing through the plug and the upper pier. The flamethrower simulates combustion, and the temperature sensor A collects the temperature of the combustion chamber in real time during the test process, safely and reliably realizing the fire resistance performance test of the building seismic isolation rubber bearing, and providing special equipment for the implementation of the local standard DBJ53 / T-47-2020 "Performance and Inspection Standards of Laminated Rubber Isolation Bearings for Construction Engineering". BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of this embodiment, the following briefly introduces the drawings required for use in the embodiment. The drawings and embodiments do not limit the invention.

[0013] Figure 1 This is a physical stereoscopic diagram of the fire resistance performance testing machine for building seismic isolation rubber bearings of the present invention.

[0014] Figure 2 This is a front view of the fire resistance performance testing machine for building seismic isolation rubber bearings of the present invention.

[0015] Figure 3 This is a structural diagram of an embodiment of a building seismic isolation rubber bearing fire resistance testing machine of the present invention.

[0016] Figure 4 yes Figure 3 Right view of .

[0017] Figure 5 yes Figure 3 The view behind the open fire door.

[0018] Figure 6 yes Figure 5 The view after removing the lower buttress, upper buttress, seismic isolation rubber bearing, and connecting plug.

[0019] Figure 7 yes Figure 5 Cross-sectional view of the middle plug.

[0020] Figure 8 It is a cross-sectional view of the lower buttress, upper buttress, and seismic isolation rubber bearing after being connected as one.

[0021] Figure 9 yes Figure 4 Magnified view of the middle K region.

[0022] Figure 10 yes Figure 8 Magnified view of the middle M region.

[0023] Figure 11 yes Figure 3 View of the fire door.

[0024] Figure 12 yes Figure 11 Right view of .

[0025] Reference numerals: 1, gantry; 2. Combustion chamber; 3. Hydraulic press; 4. Concrete foundation; 5. Fire door; 6. Door lock; 7. Flue; 8. Cable conduit; 9. Fuel delivery pipe; 10. Controller; 11. Upper pier; 12. Seismic isolation rubber bearing; 13. Lower pier; 14. Temperature sensor B; 15. Cable fire protection layer; 21. Refractory brick wall; 22. Wellhead; 23. Connector plug; 24. Fireproof asbestos layer A; 25. Temperature sensor A; 26. Flame thrower; 27. Smoke exhaust port; 28. Ball joint bearing; 29. ​​Fireproof asbestos layer B; 30. Pin; 31. Support ear; 32. Screw; 33. Opening seat; 34. Handwheel; 35. Baffle; 36. Fireproof asbestos layer C; 37. Fireproof asbestos layer D; 38. Casing; 39. Lifting rod; 40. Push rod; 41. Groove; 42. Fireproof sleeve. Implementation Method

[0026] Figures 3 to 12The embodiment of the fire resistance performance testing machine for building seismic isolation rubber bearings of the present invention is shown, which is used for testing the fire resistance performance of seismic isolation rubber bearings 12, including a gantry 1, a hydraulic press 3, a combustion chamber 2, an upper pier 11, and a lower pier 13. The gantry 1 is fixedly mounted on a concrete foundation 4 by expansion bolts, and the hydraulic press 3 is fixedly mounted on the crossbeam of the gantry 1. The hydraulic press 3 is used to apply a vertical load to the seismic isolation rubber bearing 12. The combustion chamber 2 is located in the door frame of the gantry, and the combustion chamber is composed of a refractory brick wall 21. The combustion chamber 2 is constructed of a fireproof asbestos layer A24 on the inside; a fireproof door 5 is provided on the front of the combustion chamber 2, a wellhead 22 is provided on the top of the combustion chamber 2, and a fireproof asbestos layer is laid around the wellhead 22. The fireproof asbestos layer is arranged in an arc tooth shape and the tooth pitch gradually increases from bottom to top. A plug 23 is provided in the wellhead 22. The plug 23 is located just below the hydraulic press 1. The plug 23 includes an inner ball joint support 28 and a fireproof asbestos layer B29 wrapped around the ball joint support 28 and the bottom surface. The fireproof asbestos layer on the side is arranged into an arc tooth shape with the same tooth pitch; 9 temperature sensors A25, 6 flamethrowers 26 and a smoke exhaust port 27 are arranged in the combustion chamber 2, and the temperature sensor A25 is connected to the controller 10 through the cable protection tube 8. The controller 10 is used to collect and display the measurement values ​​of each temperature sensor A25; the upper pier 11 and the lower pier 13 are concrete piers, and the lower pier 13 is supported on the ground of the combustion chamber 2. The seismic isolation rubber bearing 12 is installed on the lower pier 13. The seat 12 is an isolation rubber bearing with fireproof layer protection. Before the fireproof layer is wrapped, the four temperature sensors B14 are evenly distributed on the rubber surface of the isolation rubber bearing 12. The connecting cable of the temperature sensor B14 is wrapped with the cable fireproof protection layer 15. The temperature sensor B14 is also connected to the controller 10, and the measured value is collected and displayed by the controller 10. The upper pier 12 is installed on the isolation rubber bearing 12. The outer periphery of the upper pier is wrapped with a fireproof asbestos layer D37, and the outer periphery of the lower pier is wrapped with a fireproof asbestos layer D36.

[0027] See also Figure 8 and Figure 10In order to detect the plane deviation of the seismic isolation rubber bearing during the test, four compression measuring devices are evenly distributed on the periphery of the seismic isolation rubber bearing 12. The compression measuring device includes a push rod 40 arranged on the lower pier 13, a sleeve 38 arranged on the upper pier 11, and a lifting rod 39 arranged in the sleeve. The sleeve 38 is provided with an internal thread, and the lower end of the lifting rod 39 is provided with an external thread that cooperates with the internal thread of the sleeve. The helix angle of the thread is 10°~12°. A groove 41 is provided in the lower half of the lifting rod 39 to divide the lower half of the lifting rod 39 into two halves. After the upper pier 11, the seismic isolation rubber bearing 12, and the lower pier 13 are installed as a whole, the push rod 40 is inserted into the sleeve 38 and pressed against the lower end of the lifting rod 39; when in use, a depth gauge or a laser ranging device is used to measure the height between the top of the lifting rod 39 and the top of the sleeve 38 before and after the test to obtain four compressions of the periphery of the seismic isolation rubber bearing 12. The four compressions are compared to obtain the plane deviation.

[0028] See also Figure 4 and Figure 9 The fire door 5 has four door locks, which include a pin 30, a support ear 31, a screw 32, an opening seat 33, and a handwheel 34. The support ear 31 is fixedly mounted on the outside of the door frame of the combustion chamber 2, and one end of the screw 32 is rotatably connected to the support ear 31 through the pin 30. The opening seat 33 is fixedly mounted on the outside of the fire door 5, and the screw 32 can be inserted into the opening in the opening seat 33 by rotation. The handwheel 34 is screwed onto the screw and pushes the side of the opening seat 33 to press the fire door 5 against the door frame of the combustion chamber 2; in order to prevent the screw 32 from slipping out of the opening seat 33, a baffle 35 is rotatably mounted on the opening seat 33. When the baffle 35 rotates downward, it can block the outside of the opening of the opening seat 33 to prevent the screw 32 from slipping out of the opening seat 33.

Claims

1. Building seismic isolation rubber bearing fire resistance testing machine, characterized by: It includes a gantry, a hydraulic press, a combustion chamber, an upper pier and a lower pier. The gantry is fixedly installed on a concrete foundation by expansion bolts. The hydraulic press is fixedly installed on the crossbeam of the gantry. The hydraulic press is used to apply vertical load to the seismic isolation rubber bearing. The combustion chamber is located in the door frame of the gantry. The combustion chamber is constructed of refractory materials. A fire door is provided on the front of the combustion chamber. A wellhead is provided on the top of the combustion chamber. A fireproof asbestos layer is laid around the wellhead. A plug is provided in the wellhead. The plug is located directly below the hydraulic press. The plug includes an inner ball joint support and a fireproof asbestos layer wrapped around the periphery and bottom of the ball joint support. At least 4 temperature sensors A, 2 flamethrowers and a smoke exhaust port are provided in the combustion chamber. The upper pier and the lower pier are concrete piers. The lower pier Supported on the ground of the combustion chamber, the test seismic isolation rubber bearing is installed on the lower pier, and the upper pier is installed on the test seismic isolation rubber bearing. The outer periphery of the upper pier and the lower pier is wrapped with fireproof material; it also includes four compression measuring devices evenly distributed on the outer periphery of the seismic isolation rubber bearing, and the compression measuring device includes a top rod arranged on the lower pier, a sleeve arranged on the upper pier, and a lifting rod arranged in the sleeve, the sleeve is provided with an internal thread, and the lower end of the lifting rod is provided with an external thread matching the internal thread of the sleeve, and the helix angle of the thread is 10°~12°. The lower half of the lifting rod is provided with a groove to divide the lower half of the lifting rod into two halves. After the upper pier, seismic isolation rubber bearing and lower pier are installed as a whole, the top rod is inserted into the sleeve and pressed against the lower end of the lifting rod.

2. The fire resistance performance testing machine for building seismic isolation rubber bearings according to claim 1 is characterized by: It also includes three or more temperature sensors B, each of which is evenly distributed on the rubber surface of the test isolation rubber bearing, and the connection cables of the temperature sensors B are wrapped with fireproof materials for protection.

3. The fire resistance performance testing machine for building seismic isolation rubber bearings according to claim 2 is characterized by: The system also includes a controller for collecting measurement values ​​of the temperature sensors A and B.

4. The fire resistance performance testing machine for building seismic isolation rubber bearings according to claim 1 or 2, characterized in that: The fireproof asbestos layer wrapped around the ball joint support is arranged into an arc tooth shape with the same tooth pitch, and the fireproof asbestos layer laid around the wellhead is also arranged into an arc tooth shape with the tooth pitch gradually increasing from bottom to top.

5. The fire resistance performance testing machine for building seismic isolation rubber bearings according to claim 1 or 2, characterized in that: The fire door has four door locks, which include a pin (30), a support ear (31), a screw (32), an opening seat (33), and a hand wheel (34). The support ear (31) is fixedly mounted on the outside of the door frame of the combustion chamber. One end of the screw (32) is rotatably connected to the support ear (31) through the pin (30). The opening seat (33) is fixedly mounted on the outside of the fire door. The screw (32) can be inserted into the opening in the opening seat (33) by rotating. The hand wheel (34) is screwed onto the screw and pushes the side of the opening seat (33) to press the fire door tightly against the door frame of the combustion chamber.

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