CN109357852B - Static force rack and pseudo-static force anti-seismic testing device - Google Patents
Static force rack and pseudo-static force anti-seismic testing device Download PDFInfo
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- CN109357852B CN109357852B CN201811231483.0A CN201811231483A CN109357852B CN 109357852 B CN109357852 B CN 109357852B CN 201811231483 A CN201811231483 A CN 201811231483A CN 109357852 B CN109357852 B CN 109357852B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
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Abstract
本发明公开了一种静力台架及拟静力抗震试验装置，涉及抗震试验技术领域。该静力台架用于将试件固定设置于具有反力墙的试验区域。静力台架包括台座、试件固定组件以及台座固定组件。台座包括座体水平固定部和试件固定部，座体水平固定部位于台座的端部。台座固定组件包括第一固定组件，第一固定组件与座体水平固定部配合，能够将台座和反力墙固定连接，试件固定组件能够将试件固定设置于试件固定部。该静力台架设计合理、固定牢固，能够为试件提供平整场地，且保证为试件提供嵌固端的需求，该静力台架还可以作为可扩展功能需求台架，实用性强。
The invention discloses a static bench and a quasi-static seismic test device, and relates to the technical field of seismic test. The static bench is used to fix the test piece in the test area with the reaction wall. The static bench includes a pedestal, a specimen fixing component and a pedestal fixing component. The pedestal includes a horizontal fixing part of the pedestal body and a fixing part of the test piece, and the horizontal fixing part of the pedestal body is located at the end of the pedestal. The pedestal fixing component includes a first fixing component, the first fixing component cooperates with the horizontal fixing part of the pedestal body and can fixedly connect the pedestal and the reaction wall, and the specimen fixing component can fix the specimen on the specimen fixing part. The static bench has a reasonable design and firm fixation, which can provide a flat site for the test piece and ensure the requirement of providing embedded ends for the test piece.
Description
Technical Field
The invention relates to the technical field of anti-seismic tests, in particular to a static force rack and a pseudo-static force anti-seismic test device.
Background
The standard test conditions specified by the anti-seismic test regulations for the pseudo-static anti-seismic test basically comprise a rolling guide rail, a test jack, a counterforce wall, a static pedestal and a reciprocating actuator.
However, when the existing test room does not satisfy the corresponding test equipment, for example, the test jack and/or the rolling guide rail are lacked, and the anti-seismic performance of the bending, shearing and pressing test piece with the corner at the end is researched, how to design a new rack by using the existing conditions of the test room, satisfy the anti-seismic test conditions, and then perform the anti-seismic test.
Disclosure of Invention
The invention aims to provide a static force bench which can provide a flat field for a test piece, ensure the requirement of providing a built-in end for the test piece and carry out a pseudo-static force anti-seismic test by utilizing the existing test conditions.
The embodiment of the invention is realized by the following steps:
in view of the above, an embodiment of the present invention provides a static force bench for fixing a test piece in a test area having a reaction wall, the static force bench including a pedestal, a test piece fixing assembly, and a pedestal fixing assembly, the pedestal including a pedestal horizontal fixing portion and a test piece fixing portion, the pedestal horizontal fixing portion being located at an end portion of the pedestal;
the pedestal fixing component comprises a first fixing component, the first fixing component is matched with the pedestal horizontal fixing part and can fixedly connect the pedestal with the reaction wall, and the test piece fixing component can fix the test piece on the test piece fixing part.
In addition, the static force rack provided by the embodiment of the invention can also have the following additional technical characteristics:
in an optional embodiment of the invention, the seat horizontal fixing portion comprises a bearing pressing portion and a connecting portion, the connecting portion is provided with a pull rod hole, and the pull rod hole corresponds to an adjusting hole formed in the reaction wall;
first fixed subassembly includes top tight piece and pull rod spare, the one end butt of top tight piece bearing portion, the other end butt the counterforce wall, pull rod spare can wear to locate in proper order the draw bar hole with the regulation hole will the pedestal with counterforce wall fixed connection.
In an optional embodiment of the present invention, the specimen fixing portion is provided with a first fixing hole and a second fixing hole;
the test piece fixing assembly comprises a pressing beam and at least two horizontal limiting assemblies with positioning adjusting pieces, the number of the horizontal limiting assemblies is at least two, the horizontal limiting assemblies are respectively a left side limiting assembly and a right side limiting assembly, the left side limiting assembly is fixedly arranged in the first fixing hole, the right side limiting assembly is fixedly arranged in the second fixing hole, and each positioning adjusting piece can move in an adjusting mode and is used for extruding the test piece;
the pressure beam is located above the test piece fixing part and forms a fixing space for clamping the test piece with the test piece fixing part, and the pressure beam is fixedly connected with the test area through a fixing pull rod.
In an optional embodiment of the present invention, the horizontal position-limiting assembly further comprises a fixing seat, wherein the fixing seat comprises a fixing connection portion and a positioning adjustment portion;
the fixed connecting part is provided with a connecting hole corresponding to the first fixing hole and/or the second fixing hole, and the fixed seat is fixedly connected with the test piece fixing part through a connecting piece;
the positioning adjusting part is provided with an adjusting hole, the positioning adjusting part comprises an adjusting ejector rod and a supporting block, the adjusting ejector rod penetrates through the adjusting hole, and the supporting block is arranged at one end of the adjusting ejector rod and can be abutted to the test piece.
In an optional embodiment of the invention, the pedestal further comprises a pedestal body vertical fixing part, the pedestal body vertical fixing part is provided with a plurality of positioning strip-shaped holes, and the positioning strip-shaped holes correspond to the ground anchor holes of the test area;
the fixed subassembly of pedestal still includes the fixed subassembly of second, the fixed subassembly of second with the cooperation of the vertical fixed part of pedestal can with the pedestal with test area fixed connection.
The invention also provides a pseudo-static anti-seismic test device, which comprises a counterforce wall and a static force rack;
the reaction wall is fixedly arranged in a test area, and the pedestal is fixedly connected with the reaction wall through a first fixing component.
In an optional embodiment of the invention, the pseudo-static anti-seismic testing device further comprises a counterforce loading frame, a first spherical hinge actuator and a second spherical hinge actuator;
the reaction force loading frame is fixedly arranged in the test area, the static force rack is located below the reaction force loading frame, the first end of the first spherical hinge actuator is arranged on the reaction force loading frame, the second end of the first spherical hinge actuator is fixed with the top wall of the column head of the test piece, the first end of the second spherical hinge actuator is fixedly arranged on the reaction wall, and the second end of the second spherical hinge actuator is fixed with the side wall of the column head of the test piece.
In an alternative embodiment of the present invention, the reaction loading frame includes a loading beam, and the first spherical hinge actuator is adjustably disposed below the loading beam;
a plurality of adjusting holes are formed in the reaction wall, and the second spherical hinge actuator is fixedly connected with the reaction wall through the abutting part.
In an optional embodiment of the present invention, the pseudo-static anti-seismic testing apparatus further comprises a conversion head, wherein the conversion head comprises a connection assembly;
coupling assembling includes ball pivot fixing base, test piece column cap mounting and retaining member, the ball pivot fixing base with a plurality of fixed orificess have all been seted up to test piece column cap mounting, the ball pivot fixing base with test piece column cap mounting sets up relatively, and forms and is used for fixing the tight space of clamp of the column cap of test piece, the retaining member passes in proper order the fixed orifices of ball pivot fixing base with the fixed orifices of test piece column cap mounting will the ball pivot fixing base with the column cap fixed connection of test piece.
In an alternative embodiment of the present invention, the number of the connecting assemblies is two, and the first connecting assembly and the second connecting assembly are respectively provided, the first spherical hinge actuator is fixedly connected to the top of the column head of the test piece through the first connecting assembly, and the second spherical hinge actuator is fixedly connected to the side wall of the column head of the test piece through the second connecting assembly.
The embodiment of the invention has the beneficial effects that: reasonable in design, simple structure can provide level and smooth place for the test piece, and guarantees to provide the demand of inlaying the end for the test piece, and the practicality is strong, can satisfy and carry out vertical loading behind cantilever wall, double curvature post and the upper portion change sliding trolley jack.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a static stage provided in embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a prior pseudo-static anti-seismic testing device;
FIG. 3 is a schematic view of the structure of the stage of FIG. 1;
FIG. 4 is a partial schematic view of FIG. 1 at A;
fig. 5 is a schematic structural diagram of a pseudo-static anti-seismic testing device provided in embodiment 2 of the present invention;
FIG. 6 is a schematic structural view of the reaction loading frame in FIG. 5;
FIG. 7 is a schematic structural diagram of the test piece of FIG. 5;
FIG. 8 is a schematic view of the first ball-and-socket actuator of FIG. 5 shown disposed on a load beam;
FIG. 9 is a schematic structural diagram of the transfer head of FIG. 5;
fig. 10 is a calculation diagram of a pseudo-static anti-seismic test.
Icon: 100-a static gantry; 1-a static stage; 2-a reaction frame; 3-a counterforce wall; 4-rolling guide rails; 5-a jack; 6-a reciprocating actuator; 10-a pedestal; 102-a specimen-securing portion; 103-seat body fixing part; 104-a base horizontal fixing part; 105-a load bearing press; 106-pull rod hole; 107-positioning strip-shaped holes; 12-a specimen mount assembly; 121-a compression beam; 125-horizontal stop assembly; 126-a fixed seat; 127-a fixed connection; 128-positioning adjustment; 129-positioning adjustment; 13-a pedestal mounting assembly; 134-a top fastening member; 136-a pull rod member; 20-a pseudo-static anti-seismic test device; 21-a reaction force loading frame; 215-a load beam; 216-pin-shaft holes; 22-a first ball-and-socket actuator; 23-a second ball-and-socket actuator; 24-a floor; 25-test piece; 251-column base; 253-a shaft; 255-column cap; 26-a conversion head; 261-spherical hinge fixing seat; 262-specimen column cap fixture; 263-a retaining member; 265-first connecting component; 266-a gripper arm; 268 — a second connecting assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example 1
Fig. 1 is a schematic structural diagram of a static force bench 100 provided in this embodiment, and fig. 2 is a schematic structural diagram of a conventional pseudo-static anti-seismic testing apparatus, please refer to fig. 1 and fig. 2.
The existing pseudo-static anti-seismic testing device comprises a static pedestal 1, a reaction frame 2, a reaction wall 3, a rolling guide rail 4, a jack 5 and a reciprocating actuator 6.
However, in a specific test, because the corresponding equipment in the test chamber is not complete, such as the jack 5 and the rolling guide rail 4 are often lacked, the pseudo-static anti-seismic test cannot be completed according to the existing test conditions.
In order to study the anti-seismic performance of the bending-shearing-pressing member (with a corner at the end), the design and improvement are needed on the basis of the existing test conditions. The static stage is required to meet the boundary conditions that provide the anchoring for the test piece.
Because usually in the laboratory design, the static rack is as the global design of structure laboratory, can guarantee through reasonable anchor that the static rack does not take place relative slip, when the static rack does not design as global, how to utilize the new static rack of laboratory condition design, make it satisfy the test condition, design promptly and be used for setting up the test piece in the test area who has the reaction wall fixedly.
The specific structure and correspondence of the various components of the static gantry 100 will be described in detail below.
Referring to fig. 1, the static gantry 100 includes a stand 10, a test piece fixing assembly 12, and a stand fixing assembly 13. The pedestal 10 is horizontally arranged in a test area of a test room, is fixedly connected with the reaction wall 3 and the test floor 24 of the test room through the pedestal fixing component 13, fixedly arranges the test piece 25 to be tested on the pedestal 10 through the test piece fixing component 12, and is matched with other equipment of the test room to perform a pseudo-static anti-seismic test.
Fig. 3 is a schematic structural diagram of the pedestal 10, please refer to fig. 3.
Specifically, the pedestal 10 has a rectangular plate-like structure formed by welding plate metals extending in the horizontal direction, and the pedestal 10 includes a specimen-fixing portion 102 and a base-body-fixing portion 103, and the specimen-fixing portion 102 is located on the upper surface of the pedestal 10 and is used for fixing the specimen 25. The seat fixing portion 103 includes a seat horizontal fixing portion 104 and a seat vertical fixing portion, wherein the seat horizontal fixing portion 104 is located at an end portion of the pedestal 10, and the seat vertical fixing portion is distributed along an extending direction of the pedestal 10 and fixed by using an existing ground anchor hole of a laboratory test area.
Optionally, the seat horizontal fixing portion 104 includes a bearing pressing portion 105 and a connecting portion, the connecting portion is provided with a reinforcing rib for increasing strength, the connecting portion is provided with a through pull rod hole 106, the pressing portion is located below the connecting portion, wherein the size and the position of the pull rod hole 106 correspond to an adjusting hole formed in the reaction wall 3, so that a tester adopts the pull rod member 136 to sequentially pass through the pull rod hole 106 and the adjusting hole to perform initial positioning on the pedestal 10 and the reaction wall 3.
Optionally, a plurality of positioning bar-shaped holes 107 are formed in the vertical fixing portion of the base along the length direction of the pedestal 10, the positioning bar-shaped holes 107 are formed through the pedestal 10, the forming positions and the forming sizes of the positioning bar-shaped holes 107 correspond to ground anchor holes of a test area of an existing laboratory, and the pedestal 10 can be fixed on the floor 24 of the test area through fasteners.
Optionally, the test piece fixing portion 102 is provided with a plurality of fixing holes, that is, the fixing holes are used for limiting and fixing the test piece 25 to be tested in the horizontal direction. When the specimen 25 is placed on the specimen-fixing portion 102 of the pedestal 10, the specimen 25 divides the fixing hole of the pedestal 10 into a first fixing hole and a second fixing hole.
In the present embodiment, the specimen fixing portion 102 is an upper surface of the pedestal 10, a fixing hole is opened on the upper surface of the pedestal 10, the seat horizontal fixing portion 104 is located at an end portion of the pedestal 10, the seat vertical fixing portion is disposed along an extending direction of the pedestal 10, and a positioning strip-shaped hole 107 is opened along a height direction of the pedestal 10.
Please continue to refer to fig. 1. The fixed subassembly 13 of pedestal includes the fixed subassembly of first fixed subassembly and second, and the cooperation of the horizontal fixed part 104 of first fixed subassembly and pedestal can realize fixed connection with pedestal 10 and the current reaction wall 3 fixed connection of laboratory, and the fixed subassembly of second cooperates with the vertical fixed part of pedestal, can realize fixed connection with pedestal 10 and the ground anchor eye cooperation in test area.
Optionally, the first fixing assembly includes a top member 134 and a pull member 136, the pull member 136 can sequentially penetrate through the pull rod hole 106 and the adjusting hole of the reaction wall 3, the pedestal 10 and the reaction wall 3 are initially fixed, one end of the top member 134 abuts against the bearing pressing portion 105, the other end abuts against the reaction wall 3, the pedestal 10 is pressed tightly by adjusting the top member 134, so that the pull member 136 is pulled to limit the horizontal displacement of the pedestal 10.
In this embodiment, the tightening member 134 is a mechanical jack, and during assembly, the pedestal 10 corresponds to the reaction wall 3, so that the pull rod hole 106 formed in the horizontal fixing portion 104 of the pedestal corresponds to the adjusting hole of the reaction wall 3, the pull rod member 136 is inserted into the pull rod hole and adjusted to a proper position and screwed, the tightening member 134 is horizontally disposed between the reaction wall 3 and the horizontal fixing portion 104 of the pedestal, the height of the jack 5 is adjusted to tighten the pedestal 10 against the reaction wall 3, so as to achieve the purpose of horizontal fixation, and in an initial state, the mechanical jack is in a tightening state.
The design of the pull rod 136 is to utilize the existing adjusting holes on the reaction wall 3 to ensure that the pedestal 10 does not generate horizontal displacement when the test piece 25 is pushed, and the pull rod 136 adopts a screw rod with high strength, high modulus and large diameter to match with a mechanical jack to ensure that the test piece 25 does not generate displacement when pulled.
Optionally, the second fixing assembly is a plurality of locking pull rods, and the locking pull rods sequentially penetrate into the positioning strip-shaped holes 107 and the ground anchor holes to fix the pedestal 10 with the ground of the test area.
Fig. 4 is a partial schematic view of the static gantry 100 at a, with reference to fig. 1 and 4.
The specimen fixing assembly 12 includes a pressing beam 121 and a horizontal position restricting assembly 125, and the specimen fixing assembly 12 can fix the specimen 25 to the specimen fixing portion 102 of the pedestal 10. The pressing beam 121 is matched with the floor 24 of the test area to fix the test piece 25 from the vertical direction, and the horizontal limiting component 125 is adjustably arranged on the pedestal 10 and used for limiting the two ends of the test piece 25 from the horizontal direction.
Optionally, the horizontal limiting assembly 125 includes a fixing seat 126 and a positioning adjusting member 129, the fixing seat 126 includes a fixing connection portion 127 and a positioning adjusting portion 128, the fixing connection portion 127 is fixed to the specimen fixing portion 102 of the pedestal 10 in a matching manner, the positioning adjusting portion 128 is used for matching with the specimen 25, the fixing connection portion 127 is provided with a connection hole, the connection hole corresponds to the fixing hole, and the fixing connection portion 127 and the specimen fixing portion 102 are fixedly connected through sequentially passing through a connecting member.
The positioning adjusting part 128 is provided with an adjusting hole, the positioning adjusting part 129 comprises an adjusting ejector rod and a supporting block, the adjusting ejector rod is of a rod-shaped structure and is provided with threads, the adjusting ejector rod penetrates through the adjusting hole, the supporting block is fixedly arranged at one end of the adjusting ejector rod and is used for being abutted against one side of the test piece 25, the adjusting ejector rod is locked by the other end of the adjusting ejector rod through a bolt, and the supporting pressure between the fixing seat 126 and the test piece 25 is adjusted through an adjusting bolt.
The number of the horizontal limiting assemblies 125 is at least two, at least one of the horizontal limiting assemblies is arranged on the left side of the test piece 25, at least one of the horizontal limiting assemblies is arranged on the right side of the test piece 25, the horizontal limiting assembly 125 arranged on the left side of the test piece 25 is a left side limiting assembly, and the horizontal limiting assembly 125 arranged on the right side of the test piece 25 is a right side limiting assembly.
Wherein, the left side limit component is fixed to be set up in first fixed orifices, and the right side limit component is fixed to be set up in the second fixed orifices, and every positioning adjustment piece 129 all butts in one side of test piece 25, through adjusting, carries out the crowded tight fixed of test piece 25 from two relative directions, and horizontal limit component 125 limits the displacement of test piece 25 horizontal direction, prevents the horizontal slip.
The position of the horizontal limiting component 125 on the pedestal 10 can be adjusted to meet the loading requirements of test pieces 25 with different sizes, and the pedestal 10 is designed into an expandable form to meet the expansion requirements.
Optionally, the pressing beam 121 is located above the test piece fixing portion 102, the pressing beam 121 is located between the left limiting assembly and the right limiting assembly, the pressing beam 121 and the test piece fixing portion 102 of the pedestal 10 form a fixing space for clamping the test piece 25, through holes are formed in two ends of the pressing beam 121, the pressing beam 121 is fixedly connected with the floor 24 of the test area through a fixing pull rod, the pressing beam 121 restrains the embedded end of the test piece 25, and the test piece 25 is prevented from rotating.
In the present embodiment, the number of the pressing beams 121 is two, and the pressing beams are respectively pressed against both ends of the test piece 25, so that the test piece 25 can be firmly and stably fixed to the pedestal 10, and the pedestal 10 can also be fixedly connected to the reaction wall 3 and the floor 24 of the test area.
The test piece fixing part 102 limits horizontal displacement of the test piece fixing part through the horizontal limiting component 125, the two pressing beams 121 and the fixing pull rod with the pier heads are used for preventing the test piece 25 from rotating, the pier heads of the fixing pull rod are clamped in the ground anchor holes, the fixing pull rod penetrates through the pressing beams 121, and pretightening force can be applied among the test piece 25, the pedestal 10 and the floor 24 through screwing bolts.
The static force rack 100 provided by the embodiment 1 of the invention has the following beneficial effects:
reasonable in design, fixed firm can provide level and smooth place for test piece 25, and guarantees to provide the demand of inlaying the solid end for test piece 25, and this quiet power rack 100 can also regard as expanded function demand rack, satisfies to carry out vertical loading behind cantilever wall, double curvature post and the upper portion change sliding trolley jack.
Example 2
Fig. 5 is a schematic structural diagram of the pseudo-static anti-seismic testing device 20 provided in embodiment 2, and fig. 6 is a schematic structural diagram of the reaction force loading frame 21, please refer to fig. 5 and fig. 6.
The reaction force loading frame 21 is fixedly arranged in an existing test room, the reaction force loading frame 21 is located above the space of the static force table 100, the first spherical hinge actuator 22 is fixedly connected with the reaction force loading frame 21, the second spherical hinge actuator 23 is fixedly connected with the reaction force wall 3, and the first spherical hinge actuator 22 and the second spherical hinge actuator 23 are fixedly connected with a column head 255 of the test piece 25 through the conversion head 26, so that a pseudo-static force anti-seismic test is performed on the test piece 25.
Optionally, a first end of the first spherical hinge actuator 22 is disposed on the reaction loading frame 21, a second end of the first spherical hinge actuator 22 is fixed to the top wall of the column head 255 of the test piece 25, a first end of the second spherical hinge actuator 23 is fixedly disposed on the reaction wall 3, and a second end of the second spherical hinge actuator 23 is fixed to the side wall of the column head 255 of the test piece 25.
The first spherical hinge actuator 22 swings with horizontal displacement when being horizontally loaded, and in order to achieve an ideal condition, the upper end of the first spherical hinge actuator 22 is completely embedded on the counter-force loading frame 21, and the lower end of the first spherical hinge actuator 22 is consistent with the horizontal displacement of the column head 255 of the test piece 25 and rotates with the column head 255.
Optionally, the first spherical hinge actuator 22 is a 150T actuator, which is long (the initial length of the arm rod which is not extended when the arm rod is contracted is about 3.2m), and the actual loading horizontal displacement of the column is generally within 200mm (meeting the loading requirement of most of the test pieces 25 for at least 6%), so that the influence of the swing of the first spherical hinge actuator 22 on the vertical axial force is negligible when the column is loaded; however, the horizontal force bearing capacity of the test piece 25 needs to be recorded in the influence of the swing of the first ball joint actuator 22 according to a basic mechanical calculation model.
Fig. 7 is a schematic structural diagram of the test piece 25, and fig. 8 is a schematic structural diagram of the first spherical hinge actuator 22 disposed on the load beam 215, please refer to fig. 7 and 8.
The test piece 25 sequentially comprises a column base 251, a column body 253 and a column cap 255 from bottom to top, the column base 251 is a fixed part of the test piece 25 and is arranged on the pedestal 10 of the static force rack 100, and the column cap 255 is fixedly connected with the actuator.
Optionally, the reaction loading frame 21 includes a loading beam 215, the loading beam 215 is vertically adjustable relative to the frame body, and the first spherical hinge actuator 22 is horizontally adjustable and disposed below the loading beam 215. The first spherical hinge actuator 22 is disposed on the loading beam 215 through a fixing member, wherein the fixing member is further provided with a pin shaft hole 216, and during fixing and assembling, the pin shaft is disposed at the pin shaft hole 216 to achieve the purpose of anti-sliding.
The second spherical hinge actuator 23 is fixedly connected with the reaction wall 3 through the abutting part, and the reaction wall 3 is provided with a plurality of adjusting holes, so that the corresponding positions of the second spherical hinge actuator 23 and the reaction wall 3 are adjusted according to the structure and the size of a test piece 25 to be tested.
In order to allow the actuators to be connected to the stud 255 of the test piece 25, the switching head 26 is designed to ensure that the horizontal and rotational displacements of the first spherical hinge actuator 22 and the second spherical hinge actuator 23 correspond to the displacement of the test piece 25. Namely, the first spherical hinge actuator 22 and the second spherical hinge actuator 23 are fixedly connected with the column head 255 of the test piece 25 through the conversion head 26, and the column head 255 of the test piece 25 (cantilever column) swings through the first spherical hinge actuator 22 and the second spherical hinge actuator 23.
Fig. 9 is a schematic structural diagram of the transducing head 26, please refer to fig. 9.
The conversion head 26 comprises two connecting assemblies, the two connecting assemblies are mutually matched to form a clamping space for fixing the column head 255, and the conversion head 26 restrains the column head 255 of the test piece 25 so as to apply reciprocating horizontal displacement and vertical displacement.
Each connecting assembly comprises a spherical hinge fixing seat 261, a test piece column head fixing part 262 and a locking part 263, wherein the spherical hinge fixing seat 261 and the test piece column head fixing part 262 are oppositely arranged and provided with a plurality of fixing holes, the spherical hinge fixing seat 261 and the test piece column head fixing part 262 form a clamping space for fixing the column head 255 of the test piece 25, and the locking part 263 sequentially penetrates through the fixing holes of the spherical hinge fixing seat 261 and the fixing holes of the test piece column head fixing part 262 to fixedly connect the spherical hinge fixing seat 261 and the column head 255 of the test piece 25.
In this embodiment, the connecting assemblies are a first connecting assembly 265 and a second connecting assembly 268, the first connecting assembly 265 is vertically disposed, the first spherical hinge actuator 22 is fixedly connected to the top of the column head 255 of the test piece 25 through the first connecting assembly 265, the second connecting assembly 268 is horizontally disposed, and the second spherical hinge actuator 23 is fixedly connected to the side wall of the column head 255 of the test piece 25 through the second connecting assembly 268.
Optionally, the top of the ball hinge fixing seat 261 in the first connecting assembly 265 is oppositely provided with a clamping arm 266, and the purpose of the oppositely provided clamping arm 266 is to prevent the horizontal sliding of the first ball hinge actuator 22 and the test piece stud fixing member 262.
Optionally, the first spherical hinge actuator 22 is disposed between the clamping arms 266, and a gap is formed between the clamping arms 266 and the ear plates of the first spherical hinge actuator 22, in this embodiment, the gap is about 7mm, and the two sides of the ear plates of the first spherical hinge actuator 22 are tightly attached to each other by embedding steel bars, so that the first spherical hinge actuator 22 is stably and non-slidably connected to the spherical hinge fixing seat 261.
The trial stud retainer 262 in the second connecting assembly 268 is an integral fixed plate, being two spaced strips. And the locking member 263 in the first connecting assembly 265 and the locking member 263 in the second connecting assembly 268 are alternately arranged and fixed.
Alternatively, the length of the first ball joint actuator 22 itself is significantly greater than the target horizontal displacement required for loading, thereby ensuring that the axial force remains substantially constant throughout the loading process. The total horizontal bearing capacity of the test piece 25 can be calculated by adding the force of the second ball joint actuator 23 to the horizontal force taking into account the horizontal swinging effect of the first ball joint actuator 22.
The pseudo-static anti-seismic testing device 20 provided by the embodiment 2 adopts the first spherical hinge actuator 22 and the second spherical hinge actuator 23, so that the column cap 255 of the test piece 25 can rotate in actual loading, and the first spherical hinge actuator 22 adopts a hydraulic servo actuator, so that the displacement of the first spherical hinge actuator can be automatically adjusted, and the force can be guaranteed to be unchanged during vertical loading.
The pseudo-static anti-seismic test device 20 provided in this embodiment 2 can meet the requirement of pseudo-static loading, and can calculate the total horizontal force bearing capacity of the test piece 25 by considering a mechanics simplified model, because the first spherical hinge actuator 22 has a certain height from the spherical hinge to the loading center of the column head 255 of the test piece 25, the additional P-D effect and the horizontal force component force caused by vertical horizontal swinging can be calculated, and according to the principle that the column bottom bending moment is equivalent, the influence of swinging can be equivalent to the horizontal force, and the horizontal force generated by the second spherical hinge actuator 23 can be used as the total horizontal force bearing capacity of the test piece 25, and the calculation shows that the influence of swinging on the axial force is small, so the influence on the vertical axial force can be ignored, and the calculation diagram is shown in fig.
During the loading process, keeping the force P applied by the first spherical hinge actuator 22 constant, and gradually increasing the second spherical hinge actuator 23 to the target displacement Δ 2 or the target force F1, the correction formula at this moment is as follows:
axial force correction (negligible effect):
correcting horizontal force:
in the formula:
the horizontal force generated by the influence of the vertical MTS horizontal component force;
P(Δ1-Δ2)/h0horizontal forces generated for the vertical MTS additional P-DETA effect; f1Horizontal force at horizontal MTS.
In the embodiment, the reaction wall 3 is made of reinforced concrete, the bottom shearing force of the reaction wall 3 is 400T, and the bending moment is 3000 Tm; the static force platform frame is 100 in the ground anchor hole, 8.6m in width, 15m in length and 6t/m in allowable vertical load2The anti-pulling force of the anchor hole is 50T/anchor bolt (M60 anchor bolt), the anti-pulling force of the anchor groove is 50T/M, and the thickness of the counter-force wall is 2.4M; the first spherical hinge actuator 22 is 150T, and the second spherical hinge actuator 23 is 50T; the reaction force loading frame 21 is 200T, the maximum clear height of the reaction force loading frame 21 can be 6.1m, and the distance between the middle part of the loading beam 215 and the reaction force wall 3 is about 4.4 m; the 150T first ball-and-socket actuator 22 is operatively connected to the load beam 215 at a central portion thereof, and initially does not extend a length of about 3.2 m.
This embodiment 2 realizes cantilever column test piece 25 pseudo-static anti-seismic test through utilizing two actuators, and reaction loading frame 21 provides vertical counter-force, and reaction wall 3 provides horizontal counter-force, and vertical counter-force is applyed to first spherical hinge actuator 22, and it is rotatable to guarantee test piece 25's column cap 255 simultaneously, satisfies cantilever column cap 255 free rotation's demand, and horizontal counter-force is applyed to second spherical hinge actuator 23, guarantees cantilever column cap 255 rotation demand.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A static force rack is used for fixedly arranging a test piece in a test area with a reaction wall and is characterized by comprising a pedestal, a test piece fixing assembly and a pedestal fixing assembly, wherein the pedestal comprises a pedestal horizontal fixing part, a pedestal vertical fixing part and a test piece fixing part;
the pedestal fixing assembly comprises a first fixing assembly and a second fixing assembly, the first fixing assembly comprises a top member and a pull rod member, one end of the top member is abutted against the bearing abutting portion, the other end of the top member is abutted against the reaction wall, the pull rod member is respectively matched with the connecting portion and the reaction wall and can fixedly connect the pedestal and the reaction wall, the second fixing assembly is matched with the vertical fixing portion of the seat body, and the vertical fixing portion of the seat body is provided with a plurality of positioning strip-shaped holes corresponding to the ground anchor holes of the test area; the second fixing assembly is a locking pull rod, the locking pull rod sequentially penetrates through the positioning strip-shaped hole and the ground anchor hole, and the pedestal can be fixedly connected with the test area;
the test piece fixing component comprises a pressing beam and a horizontal limiting component, the pressing beam is positioned above the test piece fixing part and forms a fixing space for clamping the test piece with the test piece fixing part, the horizontal limiting component is fixedly connected with the test piece fixing part through a connecting piece, the test piece fixing component can fixedly arrange the test piece on the test piece fixing part, and the pressing beam is fixedly connected with the test area through a fixing pull rod;
the test piece fixing part is provided with a first fixing hole and a second fixing hole;
the horizontal limiting assemblies comprise at least two positioning adjusting parts and a fixing seat, the number of the horizontal limiting assemblies is at least two, the horizontal limiting assemblies are respectively a left side limiting assembly and a right side limiting assembly, the left side limiting assembly is fixedly arranged in the first fixing hole, the right side limiting assembly is fixedly arranged in the second fixing hole, each positioning adjusting part can move in an adjusting mode and is used for extruding the test piece, and the fixing seat comprises a fixed connecting part and a positioning adjusting part;
the fixed connecting part is provided with a connecting hole corresponding to the first fixing hole and/or the second fixing hole, and the fixed seat is fixedly connected with the test piece fixing part through a connecting piece;
the positioning adjusting part is provided with an adjusting hole, the positioning adjusting part comprises an adjusting ejector rod and a supporting block, the adjusting ejector rod penetrates through the adjusting hole, and the supporting block is arranged at one end of the adjusting ejector rod and can be abutted to the test piece.
2. A static force rack as claimed in claim 1 wherein said connecting portion is formed with a pull rod hole corresponding to an adjustment hole formed in said reaction wall;
the pull rod piece can wear to locate in proper order pull rod hole with the regulation hole will the pedestal with counterforce wall fixed connection.
3. A pseudo-static anti-seismic test device, comprising a counterforce wall and the static bench of claim 1 or 2;
the reaction wall is fixedly arranged in a test area, and the pedestal is fixedly connected with the reaction wall through a first fixing component.
4. A pseudo-static earthquake-proof test device according to claim 3, further comprising a counter-force loading frame, a first spherical hinge actuator and a second spherical hinge actuator;
the reaction force loading frame is fixedly arranged in the test area, the static force rack is located below the reaction force loading frame, the first end of the first spherical hinge actuator is arranged on the reaction force loading frame, the second end of the first spherical hinge actuator is fixed with the top wall of the column head of the test piece, the first end of the second spherical hinge actuator is fixedly arranged on the reaction wall, and the second end of the second spherical hinge actuator is fixed with the side wall of the column head of the test piece.
5. The pseudo-static earthquake-proof test device according to claim 4, wherein the counter-force loading frame comprises a loading beam, and the first spherical hinge actuator is adjustably arranged below the loading beam;
a plurality of adjusting holes are formed in the reaction wall, and the second spherical hinge actuator is fixedly connected with the reaction wall through the abutting part.
6. A pseudo-static earthquake-proof test device according to claim 4, further comprising a conversion head, wherein the conversion head comprises a connection assembly;
coupling assembling includes ball pivot fixing base, test piece column cap mounting and retaining member, the ball pivot fixing base with a plurality of fixed orificess have all been seted up to test piece column cap mounting, the ball pivot fixing base with test piece column cap mounting sets up relatively, and forms and is used for fixing the tight space of clamp of the column cap of test piece, the retaining member passes in proper order the fixed orifices of ball pivot fixing base with the fixed orifices of test piece column cap mounting will the ball pivot fixing base with the column cap fixed connection of test piece.
7. A pseudo-static anti-seismic testing device according to claim 6, wherein the number of the connecting assemblies is two, and the two connecting assemblies are respectively a first connecting assembly and a second connecting assembly, the first spherical hinge actuator is fixedly connected with the top of the column head of the test piece through the first connecting assembly, and the second spherical hinge actuator is fixedly connected with the side wall of the column head of the test piece through the second connecting assembly.
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| CN110274820B (en) * | 2019-07-29 | 2024-03-12 | 山东建筑大学 | Test piece fixing device for static test is planned to frame roof beam bending point |
| CN110657931A (en) * | 2019-08-22 | 2020-01-07 | 广西大学 | A loading device for seismic performance test of vertical members under eccentric tension |
| CN110657932A (en) * | 2019-08-22 | 2020-01-07 | 广西大学 | A loading device for the seismic performance test of vertical members with combined tension and shear action |
| CN111103108B (en) * | 2020-01-10 | 2021-12-31 | 济南三越测试仪器有限公司 | Pseudo-static multifunctional test system |
| CN111487325B (en) * | 2020-05-09 | 2020-12-01 | 徐州鑫宇源工程机械科技有限公司 | Porous material sound insulation anti-seismic performance detection equipment |
| CN111595575B (en) * | 2020-06-28 | 2021-07-20 | 武汉理工大学 | Actuator parallel loading test device |
| CN114279667B (en) * | 2022-03-07 | 2022-07-12 | 成都理工大学 | Pseudo-static anti-seismic testing device and method for wallboard joint |
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| CN202110061U (en) * | 2011-06-14 | 2012-01-11 | 西安建筑科技大学 | A multifunctional quasi-static test device |
| CN102706734B (en) * | 2012-06-14 | 2014-06-18 | 北京工业大学 | Loading test device and method of asymmetric lateral-force-resisting structure |
| CN103884528A (en) * | 2014-03-20 | 2014-06-25 | 河海大学 | Beam-end loaded plane frame joint pseudo-static test loading device |
| CN204064275U (en) * | 2014-08-27 | 2014-12-31 | 广州大学 | A kind of New Displacement Transducer conversion and multiplying arrangement |
| CN204679269U (en) * | 2015-06-12 | 2015-09-30 | 中国人民解放军理工大学 | A kind of pseudo static testing device |
| CN104913918A (en) * | 2015-06-12 | 2015-09-16 | 中国人民解放军理工大学 | Pseudo-static test device |
| CN105575229B (en) * | 2016-01-27 | 2017-10-20 | 大连理工大学 | A kind of multilayer, multispan Static Model horizontal addload and guider |
| CN206038456U (en) * | 2016-09-28 | 2017-03-22 | 中国矿业大学 | Quiet power experimental apparatus is planned to wall body that adds carrier band window |
| CN107132034B (en) * | 2017-05-09 | 2019-06-07 | 昆明理工大学 | A kind of underground structure pseudo static testing device and method |
| CN107167368B (en) * | 2017-05-16 | 2023-03-10 | 华侨大学 | A kind of quasi-static test device and its implementation method for concrete columns subjected to non-surrounding fire |
| CN108088672B (en) * | 2017-11-29 | 2019-06-28 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of aircraft nose landing gear outer cylinder suspension joint slow test fixture |
| CN107966357B (en) * | 2017-12-11 | 2023-08-18 | 哈尔滨工业大学 | A pseudo-static test device and method for a reinforced concrete column without a base |
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