CN112064547A - Force transmission type damping energy consumption concrete structure anti-collision device and anti-collision method - Google Patents
Force transmission type damping energy consumption concrete structure anti-collision device and anti-collision method Download PDFInfo
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- CN112064547A CN112064547A CN202010787289.1A CN202010787289A CN112064547A CN 112064547 A CN112064547 A CN 112064547A CN 202010787289 A CN202010787289 A CN 202010787289A CN 112064547 A CN112064547 A CN 112064547A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
- E01F15/141—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands for column or post protection
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
- E01F15/145—Means for vehicle stopping using impact energy absorbers
- E01F15/146—Means for vehicle stopping using impact energy absorbers fixed arrangements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- Structural Engineering (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a force transmission type damping energy consumption concrete structure anti-collision device and an anti-collision method, wherein the force transmission type damping energy consumption concrete structure anti-collision device comprises a plurality of force transmission type damping energy consumption units which are arranged in a linear type, an arc shape or a circular shape; each force transmission type damping energy consumption unit comprises a collision system, a constraint system, a power conversion system and a bottom plate; the collision system comprises a collision plate, a dowel bar and a compression damper; the restraint system comprises a sleeve, and the power conversion system comprises a crank, a rotating shaft, a diagonal draw bar and a tension damper; the position of the rotating shaft is fixed, the crank is sleeved on the rotating shaft, one end of the crank is hinged with the dowel bar, and the other end of the crank is hinged with the diagonal draw bar; the middle part of the diagonal draw bar is provided with a tension damper, and the bottom end of the diagonal draw bar is hinged with a bottom plate; the bottom plate is installed in the foundation. According to the invention, the horizontal impact force received by the collision system is transmitted to the bottom plate through the power conversion system, the compression damping and the tension damping buffer and absorb energy in the force transmission process, finally the impact energy is transmitted to the ground, and the concrete structure is protected from the impact force, so that the purpose of protecting the concrete structure is achieved.
Description
Technical Field
The invention relates to an anti-collision device, in particular to a force transmission type damping energy consumption concrete structure anti-collision device and an anti-collision method.
Background
The collision accidents of vehicles to various piers are high in occurrence frequency, a large amount of economic loss and casualties are directly or indirectly caused, and more challenges are provided for the safety of the engineering entity after the collision.
Therefore, it is very important to consider the engineering technology to reinforce and protect the concrete structure with the requirement of collision avoidance, and how to greatly reduce the impact damage of the impact force of the collision to the concrete structure is a consensus of the vast engineering technicians.
At present, most of anti-collision design ideas are concentrated on arranging a buffering layer and an energy dissipation layer, and collision energy is absorbed through damping materials or foam concrete and the like. However, the anti-collision structure and the waterproof structure have the following defects and need to be improved:
1. the anticollision material all coats and sets up in concrete structure's periphery, and concrete structure still bears the main part as the collision, and the anticollision material only plays certain buffering, energy dissipation effect. When a large-volume object (such as an automobile truck and the like) impacts a concrete structure, the impact force is far greater than the buffering and energy dissipation effects of the anti-collision material, so that the concrete structure can be damaged by impact to a certain degree, and the reliable support of the upper concrete structure is influenced.
2. When the concrete structure is damaged by impact, the repairing process is complex, difficult and fussy.
3. Most of the existing anti-collision materials are easy to age and have short service life due to organic materials (rubber) in the components.
4. In order to avoid the impact damage of the concrete structure, the thickness of the anti-collision material needs to be increased for increasing the buffer force, so that the anti-collision material on the periphery of the concrete structure is too thick to occupy the space of a road or a navigation channel.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a force transmission type damping energy consumption concrete structure anti-collision device and an anti-collision method.
In order to solve the technical problems, the invention adopts the technical scheme that:
a force transmission type damping energy consumption concrete structure anti-collision device comprises a plurality of force transmission type damping energy consumption units.
The force transmission type damping energy dissipation units are arranged on the periphery of the concrete member in a linear type, an arc shape or a circular shape, and the anti-collision plates in the two adjacent force transmission type damping energy dissipation units are spliced.
Each force transmission type damping energy consumption unit comprises a collision system, a restraint system, a power conversion system and a bottom plate.
The impact system includes an impact plate, a dowel bar, and a compression damper. The front of the collision plate is used for directly bearing collision impact force, the middle of the back of the collision plate is connected with the head end of the dowel bar, and the tail of the dowel bar is provided with compression damping.
The restraint system comprises a sleeve, the sleeve is coaxially sleeved on the periphery of the middle part of the dowel bar, and the position of the sleeve is fixed. The dowel bar can slide horizontally in the sleeve.
The power conversion system comprises a crank, a rotating shaft, a diagonal draw bar and a tension damper. The pivot position is fixed, and the suit is rotated in the middle part of crank in the pivot, and the one end of crank is articulated mutually with the tail end of dowel steel, and the other end of crank is articulated mutually with the top of oblique pull rod, and the middle part installation of oblique pull rod is pulled the damping, and the bottom of oblique pull rod articulates on the bottom plate.
The bottom plate is installed in a foundation adjacent to the concrete structure.
The collision system also comprises a plurality of collision plate inclined struts, one end of each collision plate inclined strut is connected with the back of the collision plate, and the other end of each collision plate inclined strut is connected to the dowel bar.
The sleeve is sleeved on the periphery of the dowel bar between the inclined strut of the collision plate and the compression damping. The restraint system also includes a metal piece, a first sleeve diagonal brace and a second sleeve diagonal brace. And two sides of the sleeve are respectively provided with a metal piece, each metal piece is connected with the bottom plate through a sleeve inclined strut I, and each metal piece is also connected with the rotating shaft through a sleeve inclined strut II.
The axial length of the sleeve is 20mm-60 mm. The inner diameter of the sleeve is 1.2-1.5 times of the outer diameter of the dowel bar.
The collision plate sequentially comprises an ECC composite material, damping rubber and a steel plate from the front to the back.
The crank between the dowel bar and the rotating shaft forms a crank force arm I with a length of l1. The difference between the diagonal draw bar and the rotating shaft is formed as a crank arm II with a length of l2. Then l2/l1∈[1.5,2]。
The collision plate is a plane plate or a curved plate. The elevation of the upper flange of the collision plate is 1.0-1.5 m, and the elevation of the lower flange is 0.10-0.20 m.
A force-transmission type damping energy-consumption concrete structure anti-collision method comprises the following steps:
step 1, assembling a force transmission type damping energy consumption unit: and assembling each force transmission type damping energy consumption unit, and after the assembly is finished, performing horizontal impact test on each force transmission type damping energy consumption unit.
Step 3, impacting: when a striker impacts one or a plurality of adjacent transmission type damping energy consumption units of the anti-collision device, the collision plate directly bears collision impact force, and the collision impact force drives the transmission rod to horizontally move along the sleeve and simultaneously drives the crank to rotate. In the process of force transmission, collision impact force is buffered and absorbed through damping rubber, compression damping and hand-pulling damping in sequence, and finally impact energy is transmitted to the ground through a steel support anchored with the bottom plate.
And 4, replacing the force transmission type damping energy consumption unit: after the impact, when a certain force transmission type damping energy consumption unit is damaged or the horizontal impact test is unqualified, the certain force transmission type damping energy consumption unit is replaced by the force transmission type damping energy consumption unit qualified in the horizontal test in the step 1.
In the step 2, when the concrete structure is a square pier or a square column, the force transmission type damping energy consumption units are linearly arranged on the periphery of an easily-impacted area of the concrete structure. When the concrete structure is a circular pier or a circular column body, the force transmission type damping energy consumption units are circularly and coaxially arranged on the periphery of the concrete structure. When the concrete structure is a 90-degree arc corner, the force transmission type damping energy consumption units are arranged on the periphery of the concrete structure in an arc shape, and the central angle is 100-150 degrees.
In step 3, the rotation amplitude of the crank is controlled to be 45-60 degrees.
The invention has the following beneficial effects:
1. according to the invention, the horizontal impact force received by the collision system is transmitted to the bottom plate through the power conversion system, the compression damping and the tension damping buffer and absorb energy in the force transmission process, finally the impact energy is transmitted to the ground, and the concrete structure is protected from the impact force, so that the purpose of protecting the concrete structure is achieved, and important facilities are protected better.
2. All components of the anti-collision device can be prefabricated in a factory and assembled on site, and modular assembly is realized. In the event of a collision, the partially damaged component can be quickly removed and replaced with a factory preform.
3. Most of the existing anti-collision devices are concentrated on arranging buffer layers, and the impact on the structure is reduced by using modes of damping energy dissipation and the like, but most of the damping is easy to age and short in service life due to organic materials (rubber) in the components.
4. The anti-collision device can meet the anti-collision requirements of common piers, military facilities, emergency channels and viaduct piers, and is difficult and complicated in later maintenance compared with the existing damping material anti-collision facilities, and the device is simple and exquisite in maintenance, updating and application.
5. The height of the upper edge and the lower edge of the collision plate from the ground is properly expanded according to the position size requirement of QC/T487 and 1999 automobile bumpers, so that the impact force of various automobile collisions can be timely transmitted to the ground.
6. The collision inclined strut, the sleeve inclined strut and the rotating shaft inclined strut all adopt triangular stable structures, and sufficient strength and rigidity are provided for the device to cope with collision.
7. The three-layer design of the collision plate can fully transmit impact force, and high-damping rubber in the collision plate can be protected through the ECC composite material on the outer surface, so that the service life of the collision plate is prolonged.
Drawings
Fig. 1 shows a schematic structural diagram of a force-transmitting damping energy-consuming concrete structure anti-collision device of the invention.
Fig. 2 shows an enlarged bottom schematic view of fig. 1.
Fig. 3 shows a schematic structural diagram of the force-transferring damping energy-dissipating unit according to the present invention.
Fig. 4 shows a top view of the power transmission type damping energy dissipation unit of the present invention.
Fig. 5 shows a right side view of the power transmission type damping energy dissipation unit of the present invention.
Fig. 6 shows a schematic size diagram of the power transmission type damping energy dissipation unit of the present invention.
FIG. 7 shows a schematic of the power conversion system and restraint system of the present invention.
FIG. 8 shows a schematic of the power conversion system of the present invention.
Figure 9 shows an enlarged view of a portion of the restraint system of the present invention.
Fig. 10 shows a close-up view of the crank bearing of the present invention.
FIG. 11 is an enlarged view of a portion of the crank and shaft of the present invention.
Fig. 12 shows a schematic of the dowel and compression damping of the present invention.
Fig. 13 shows a schematic view of the diagonal member of the present invention.
Figure 14 shows a schematic view of a wedge-shaped hinge base according to the invention.
FIG. 15 shows a schematic view of the splicing of the impact plate of the present invention.
Fig. 16 shows a schematic diagram of the cranking in the present invention.
FIG. 17 shows a schematic of the power conversion in the present invention.
FIG. 18 shows an example of the linear arrangement of the force-transmitting damping dissipating units according to the present invention.
Fig. 19 shows an example of the force-transmitting damping dissipating units of the present invention arranged in an arc shape.
Fig. 20 shows an example of the circular arrangement of the force-transmitting damping dissipating units according to the present invention.
Among them are:
10. a collision system; 11. a collision plate; 12. a collision plate diagonal brace; 13. a dowel bar; 14. pressure damping; 15. a dowel bar hinges a ball; an ECC composite; 112. damping rubber; 113. a steel plate;
20. a restraint system; 21. a sleeve; 22. a sleeve is obliquely supported; 23. a metal member; 24. a second sleeve inclined strut;
30. a power conversion system;
31. a crank; 32. a rotating shaft; 33. a rotating shaft inclined strut; 34. a diagonal member; 341. hinging the inclined pull rod with a ball; 35. damping in tension; 36. a bearing;
40. a base plate; 41. a wedge-shaped hinged support; 42. a bolt group;
50. a force transmission type damping energy consumption unit; 60. a concrete structure; 70. an anti-collision device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
As shown in fig. 1 and 2, a force-transferring damping energy-consuming concrete structure anti-collision device, referred to as an anti-collision device 70 for short, includes a plurality of force-transferring damping energy-consuming units 50.
As shown in fig. 2, 18, 19 and 20, the force-transmission damping energy-dissipating units are arranged in a straight line, arc or circle on the periphery of the concrete member.
As shown in fig. 3, 4 and 5, each of the power transmission type damping and dissipating units includes a collision system 10, a restraint system 20, a power conversion system 30 and a base plate 40.
The impact system includes an impact plate 11, impact plate struts 12, a dowel bar 13, and a compression damper 14.
The front surface of the collision plate is used to directly receive collision impact force, and the collision plate preferably includes an ECC composite 111, a damping rubber 112, and a steel plate 113 in this order from the front surface to the rear surface.
The ECC composite 111 is preferably an ultra-high toughness fiber-reinforced cement-based composite, the damping rubber 112 is preferably a high damping rubber, the damping ratio is preferably not less than 10%, and further preferably the damping ratio ζ ∈ [ 10%, 16% ].
The ECC composite material can effectively prevent the aging of high-damping rubber in the collision plate and prevent the corrosion of the steel plate. Meanwhile, the high-damping rubber buffers impact force at the moment of collision, and a flexible protective layer is provided for the anti-collision device.
As shown in fig. 15, the anti-collision plates in two adjacent power transmission type damping energy dissipation units are preferably spliced through a C-shaped notch.
The structure of dowel bar, as shown in fig. 12, the head end of dowel bar is preferably connected with the middle of the back of collision plate, the tail end of dowel bar is provided with a dowel bar hinge 15, and the tail of dowel bar in front of the dowel bar hinge ball is provided with a compression damper 14.
The collision plate is also limited in vertical position through a plurality of collision plate inclined struts, preferably four collision plate inclined struts are arranged in the vertical and horizontal directions of the dowel bar respectively, one end of each collision plate inclined strut is connected with the back of the collision plate, and the other end of each collision plate inclined strut is connected to the dowel bar (preferably connected to the middle front end of the dowel bar).
The collision plate is preferably a plane plate or a curved plate, and the like, the elevation of the upper flange and the lower flange of the collision plate 11 is selected and collected [360mm,770mm ] according to the position size requirement of QC/T487-; namely, the elevation of the upper flange of the collision plate is 1.0-1.5 m, and the elevation of the lower flange is 0.10-0.20 m.
As shown in fig. 7 and 9, the restraint system includes a sleeve 21, a sleeve sprag one 22, a sleeve sprag two 24 and a metal piece 23.
The sleeve is coaxially sleeved on the periphery of the middle part of the dowel bar, and preferably sleeved on the dowel bar between the inclined strut of the collision plate and the compression damper.
The sleeve is fixed in position, and the specific fixing method is preferably as follows: the two sides of the outer wall surface of the sleeve are symmetrically provided with a metal piece 23 respectively, each metal piece is connected with a sleeve inclined strut I22 and a sleeve inclined strut II 24 respectively, the other end of the sleeve inclined strut I is fixedly connected to the bottom plate 40, and the other end of the sleeve inclined strut II is fixedly connected to a rotating shaft 32 in the power conversion system.
The axial length of the sleeve is preferably 20mm to 60 mm. The inner diameter of the sleeve is preferably 1.2-1.5 times of the outer diameter of the dowel bar; so that the dowel bar can slide horizontally and freely in the sleeve.
As shown in fig. 7 and 8, the power conversion system includes a crank 31, a rotating shaft 32, a rotating shaft sprag 33, a diagonal draw bar 34, and a tension damper 35.
The position of the rotating shaft is fixed, and two ends of the bottom of the rotating shaft are preferably connected with the bottom plate through two rotating shaft inclined struts.
As shown in fig. 11, the middle part of the crank is preferably rotatably sleeved on the rotating shaft through a bearing 36, and one end of the crank is hinged with the tail end of the dowel bar through a dowel bar hinge ball and a hinge seat.
As shown in fig. 13, two ends of the diagonal member are respectively provided with a diagonal member hinge ball 341. Wherein the hinge ball 341 of the diagonal draw bar at the top end is hinged with the hinge seat at the bottom end of the crank, as shown in fig. 10. The hinge ball 341 of the diagonal member at the top end is hinged with the wedge-shaped hinge base 41 arranged on the bottom plate, as shown in fig. 14.
The strength of the metal used for the dowel bar hinge ball 15 and the diagonal draw bar hinge ball 341 is not lower than the strength of the material of the crank 31 and the wedge-shaped hinge base 41, and Q235, Q345 or higher alloy steel can be adopted.
The tension damper 35 is installed in the middle of the diagonal member, and the compression damper has the same strength as the tension damper, preferably the same strength as the dowel member and the diagonal member, but higher strength than the dowel member and the diagonal member.
The bottom plate is installed in the foundation adjacent to the concrete structure, and is preferably anchored with steel supports embedded in the foundation by means of bolt groups 42.
The crank between the dowel bar and the rotating shaft forms a crank force arm I with a length of l1. The difference between the diagonal draw bar and the rotating shaft is formed as a crank arm II with a length of l2. Then l2/l1∈[1.5,2]。
A force-transmission type damping energy-consumption concrete structure anti-collision method comprises the following steps:
step 1, assembling a force transmission type damping energy consumption unit: and assembling each force transmission type damping energy consumption unit, and after the assembly is finished, performing horizontal impact test on each force transmission type damping energy consumption unit.
The specific preferred assembly method is as follows: a single power transmission type damping energy consumption unit meeting the requirements is prefabricated by a factory according to the requirements, a sample plate with a corresponding size is cut out by selecting proper steel, and then the rotating shaft 32 is fixedly connected with the constraint system 20 and the bottom plate 40 respectively through the rotating shaft inclined strut and the sleeve inclined strut II. Rotating the bearing 36, installing a crank 31 turned out by the machine tool, welding and anchoring a part of a joint needing to be reinforced, and welding the dowel bar 13 and the collision plate 11 together through four collision plate inclined struts 12; the dowel 13 passes through the sleeve 21 and is embedded in the socket of the crank 31 by means of the dowel hinge ball 15. After each device is assembled, the horizontal impact test of the dowel bar 13 is carried out, and each part can be delivered from the factory after being normally operated.
And 2, assembling the anti-collision device.
And (2) according to the shape of the concrete structure to be protected, arranging a plurality of force transmission type damping energy consumption units qualified in the horizontal impact test in the step (1) at the periphery of the concrete structure or the periphery of an area easy to impact in the concrete structure in a linear type, an arc shape or a circular shape to form an anti-collision device. The anti-collision plates in two adjacent power transmission type damping energy consumption units are preferably spliced with each other through the C-shaped clamping grooves. A plurality of steel supports are pre-buried in the foundation adjacent to the concrete structure. All the bottom plates are anchored with the pre-embedded steel supports through the bolt groups.
As shown in fig. 18, when the concrete structure is a square pier or a square column, the force-transferring damping energy-consuming units are arranged in a linear manner on the periphery of the easy-to-impact region of the concrete structure.
As shown in fig. 20, when the concrete structure is a circular pier or a circular column, the force-transferring damping energy-consuming units are circularly and coaxially arranged on the periphery of the concrete structure.
As shown in fig. 19, when the concrete structure is a 90 ° arc corner, a plurality of force-transmitting damping energy-consuming units are arranged at the periphery of the concrete structure in an arc shape, and the central angle is 100 ° to 150 °.
And step 3, impacting.
When a striker impacts one or more adjacent power transmission type damping energy consumption units of the anti-collision device, the collision plate directly bears collision impact force (also called horizontal impact force F)0) And the collision impact force drives the dowel bar to horizontally move along the sleeve and simultaneously drives the crank to rotate. In the process of force transmission, collision impact force is buffered and absorbed through damping rubber, compression damping and hand-pulling damping in sequence, and finally impact energy is transmitted to the ground through a steel support anchored with the bottom plate.
As shown in fig. 16 and 17, the rotation amplitude phi of the crank is preferably controlled to be 30-90 degrees, and further preferably 45-60 degrees, and each force-transmission type damping energy-consumption unit is subjected to a horizontal impact force F by the collision system 100The impact force is transmitted to the bottom plate by the mechanical motion of the diagonal draw bar 34 driven by the rotation of the crank 31 when being transmitted to the power conversion system 3040, the compression damping 14 and the tension damping 35 buffer and absorb energy in the process of force transmission, and finally the force is transmitted to the ground through the steel support mutually riveted with the bottom plate 40, so that the purpose of protecting the concrete structure is achieved.
Fig. 17 shows a force analysis diagram of power conversion system 30. Then in the process of force transmission:
the strength of the material of the dowel bar 13 should satisfy:
fyA1≥F0max
wherein: f. ofy: the strength of the dowel bar material;
A1: is the minimum cross-sectional area of the dowel bar;
F0max: the maximum horizontal impulse force borne by the dowel bar.
The material strength of the diagonal draw bar 34 should satisfy:
fyA2≥F1max
wherein: f. ofy: the strength of the diagonal draw bar material;
A2: the minimum cross-sectional area of the diagonal member;
F1max: the maximum tensile force borne by the diagonal draw bar.
The dimensional proportions of the crank 31 are:
wherein: l is32The longitudinal length of the upper rotating power arm is defined, and the upper rotating arm refers to an arm hinged with the dowel bar;
L33the lower rotating arm is the longitudinal length of the lower rotating arm and is the arm hinged with the diagonal draw bar.
The crank 31 should partially satisfy:
that is F0maxl1＝F1maxl2
σc≤fyAnd sigmat≤fy
fy≤fy5
l2/l1∈[1.5,2]
Wherein: l1The length of the upper rotating power arm;
l2the length of the lower rotating power arm is defined, and the lower rotating power arm is a labor-saving force arm;
phi is the rotation amplitude of the crank;
fy5the material strength of compression damping or tension damping is the same as that of the compression damping and the tension damping;
fythe material strength of the dowel bar or the diagonal draw bar is the same;
σcthe pressure stress applied to the dowel bar;
σtthe tensile stress applied to the diagonal draw bar.
In fig. 16, L25 represents the actual length of the crank lower power arm, i.e. L2, L251, L252 represent the horizontal projection length of the rotation amplitude of the crank lower power arm respectively; l24 represents the length of the horizontal projection of the amplitude of rotation of the rotary arm on the crank.
The size proportion of each part of the force-transmission damping energy-consumption unit is shown in fig. 6, and the actual length of the lower power-transmission arm of the crank 31 is assumed to be L, i.e. L ═ L2The proportion of the sizes of the parts is as follows:
the above letters are respectively expressed as follows:
l1: a collision plate longitudinal length; l11: longitudinal projection of the top impact plate diagonal brace; l12: longitudinal projection of the bottom impact plate diagonal brace; l2: the horizontal length of the impact plate to the right edge of the crank (the horizontal length of the device as a whole); l21: the horizontal projection length of the impact plate diagonal brace; l22: the distance from the inclined strut node of the collision plate to the sleeve; l23: horizontal distance between sleeve and crank, L24: the horizontal projection length of the rotation amplitude of the rotary arm on the crank; l5: the horizontal length of the floor; l3: the overall height of the device; l31: distance from the transfer rod axis to the upper edge of the impact plate; l34: the length of the longitudinal projection of the diagonal draw bar in a static state; l35: the thickness of the bottom plate. Through the design of the size, the size proportion relation among all parts of the device can be conveniently understood, for the limited length among the inclined strut nodes such as L22, the reason is that the collision among all parts can not occur when the inclined strut nodes rotate, and the proportion of all the parts is determined by calculating the motion trail before and after the rotation, so that the flexibility of the rotation is ensured.
When the scale of FIG. 6 is used, the rotation of the crank 31 in the power conversion system 30 is analyzed, and φ is 60 as shown in FIG. 16, the optimal ratio of the components is as follows:
length of upper rotating power arm is taken as l1Assuming that the horizontal direction of the dowel bar is the X axis and the vertical direction perpendicular to the X axis is the Y axis, the swing amplitude Deltay of the upper rotating power arm on the Y axis1And amplitude deltax on the X-axis1Respectively as follows:
taking the length l of the lower power-down arm2Then the swing amplitude delta Y of the lower power-rotating arm on the Y axis2And amplitude deltax on the X-axis2Respectively as follows:
the swing amplitude Deltay of the crank on the Y axis and the swing amplitude Deltax on the X axis are respectively
Δ y above1、Δy2And Δ Y each represents a projection length of the corresponding portion in the Y-axis direction, and when the rotation angles are the same, the projection lengths are different because the vertical rotational arms are different in length.
And 4, replacing the force transmission type damping energy consumption unit: after the impact, when a certain force transmission type damping energy consumption unit is damaged or the horizontal impact test is unqualified, the certain force transmission type damping energy consumption unit is replaced by the force transmission type damping energy consumption unit qualified in the horizontal test in the step 1. Each force transmission type damping energy consumption unit can be prefabricated and assembled in a modularized mode in a factory according to requirements, and therefore time is saved.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (10)
1. The utility model provides a biography power formula damping power consumption concrete structure buffer stop which characterized in that: the damping energy dissipation device comprises a plurality of force transmission type damping energy dissipation units; the force transmission type damping energy consumption units are arranged on the periphery of the concrete member in a linear, arc or circular manner, and the anti-collision plates in two adjacent force transmission type damping energy consumption units are spliced;
each force transmission type damping energy consumption unit comprises a collision system, a constraint system, a power conversion system and a bottom plate;
the collision system comprises a collision plate, a dowel bar and a compression damper; the front surface of the collision plate is used for directly bearing collision impact force, the middle part of the back surface of the collision plate is connected with the head end of the dowel bar, and the tail part of the dowel bar is provided with a compression damper;
the constraint system comprises a sleeve, the sleeve is coaxially sleeved on the periphery of the middle part of the dowel bar and is fixed in position; the dowel bar can horizontally slide in the sleeve;
the power conversion system comprises a crank, a rotating shaft, a diagonal draw bar and a tension damper; the position of the rotating shaft is fixed, the middle part of the crank is rotatably sleeved on the rotating shaft, one end of the crank is hinged with the tail end of the dowel bar, the other end of the crank is hinged with the top end of the diagonal draw bar, the middle part of the diagonal draw bar is provided with a tension damper, and the bottom end of the diagonal draw bar is hinged on the bottom plate;
the bottom plate is installed in a foundation adjacent to the concrete structure.
2. The force-transmitting damping energy-consuming concrete structure anti-collision device according to claim 1, characterized in that: the collision system also comprises a plurality of collision plate inclined struts, one end of each collision plate inclined strut is connected with the back of the collision plate, and the other end of each collision plate inclined strut is connected to the dowel bar.
3. The force-transmitting damping energy-consuming concrete structure anti-collision device according to claim 2, characterized in that: the sleeve is sleeved on the periphery of the dowel bar between the inclined strut of the collision plate and the compression damper; the restraint system also comprises a metal piece, a sleeve diagonal brace I and a sleeve diagonal brace II; and two sides of the sleeve are respectively provided with a metal piece, each metal piece is connected with the bottom plate through a sleeve inclined strut I, and each metal piece is also connected with the rotating shaft through a sleeve inclined strut II.
4. The force-transmitting damping energy-consuming concrete structure anti-collision device according to claim 1, characterized in that: the axial length of the sleeve is 20mm-60 mm; the inner diameter of the sleeve is 1.2-1.5 times of the outer diameter of the dowel bar.
5. The force-transmitting damping energy-consuming concrete structure anti-collision device according to claim 1, characterized in that: the collision plate sequentially comprises an ECC composite material, damping rubber and a steel plate from the front to the back.
6. The force-transmitting damping energy-consuming concrete structure anti-collision device according to claim 1, characterized in that: the crank between the dowel bar and the rotating shaft forms a crank force arm I with a length of l1(ii) a The difference between the diagonal draw bar and the rotating shaft is formed as a crank arm II with a length of l2(ii) a Then l2/l1∈[1.5,2]。
7. The force-transmitting damping energy-consuming concrete structure anti-collision device according to claim 1, characterized in that: the collision plate is a plane plate or a curved plate; the elevation of the upper flange of the collision plate is 1.0-1.5 m, and the elevation of the lower flange is 0.10-0.20 m.
8. A force transmission type damping energy consumption concrete structure anti-collision method is characterized in that: the method comprises the following steps:
step 1, assembling a force transmission type damping energy consumption unit: assembling each force transmission type damping energy consumption unit, and after the assembly is finished, performing horizontal impact test on each force transmission type damping energy consumption unit;
step 2, assembling the anti-collision device: according to the shape of the concrete structure to be protected, arranging a plurality of force transmission type damping energy consumption units qualified in the horizontal impact test in the step 1 at the periphery of the concrete structure or the periphery of an area easy to impact in the concrete structure in a linear type, an arc shape or a circular shape to form an anti-collision device; the anti-collision plates in two adjacent power transmission type damping energy consumption units are spliced with each other; a plurality of steel supports are pre-buried in the foundation adjacent to the concrete structure; all the bottom plates are anchored with the pre-embedded steel supports through bolt groups;
step 3, impacting: when a striker impacts one or a plurality of adjacent force transmission type damping energy consumption units of the anti-collision device, the collision plate directly bears collision impact force, and the collision impact force drives the force transmission rod to horizontally move along the sleeve and simultaneously drives the crank to rotate; in the process of force transmission, collision impact force is buffered and absorbed through damping rubber, compression damping and hand-pulling damping in sequence, and finally impact energy is transmitted to the ground through a steel support anchored with the bottom plate;
and 4, replacing the force transmission type damping energy consumption unit: after the impact, when a certain force transmission type damping energy consumption unit is damaged or the horizontal impact test is unqualified, the certain force transmission type damping energy consumption unit is replaced by the force transmission type damping energy consumption unit qualified in the horizontal test in the step 1.
9. The force-transmitting damping energy-consuming concrete structure anti-collision method according to claim 8, characterized in that: in the step 2, when the concrete structure is a square pier or a square column, a plurality of force transmission type damping energy consumption units are linearly arranged on the periphery of an easily-impacted area of the concrete structure; when the concrete structure is a circular pier or a circular column, the force transmission type damping energy consumption units are circularly and coaxially arranged on the periphery of the concrete structure; when the concrete structure is a 90-degree arc corner, the force transmission type damping energy consumption units are arranged on the periphery of the concrete structure in an arc shape, and the central angle is 100-150 degrees.
10. The force-transmitting damping energy-consuming concrete structure anti-collision method according to claim 8, characterized in that: in step 3, the rotation amplitude of the crank is controlled to be 45-60 degrees.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445451A (en) * | 2021-06-25 | 2021-09-28 | 南京科邦复合材料有限公司 | Anti-impact energy absorption protective guard for passenger car and manufacturing method thereof |
| CN113846590A (en) * | 2021-10-10 | 2021-12-28 | 北京工业大学 | Aluminum alloy corrugated plate-ECC plate combined anti-collision guardrail |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999036630A1 (en) * | 1998-01-13 | 1999-07-22 | Bcc Baltic Construction Company Ab | Crash barrier especially for roads and bridges |
| KR100537357B1 (en) * | 2005-09-09 | 2005-12-16 | 주식회사 서영엔지니어링 | Vehicles anti-clash apparatus for pier safeguard |
| CN205934700U (en) * | 2016-08-08 | 2017-02-08 | 衢州市仲汇劳保用品有限公司 | Bridge girder and pier passageway guiding device |
| CN206204886U (en) * | 2016-11-02 | 2017-05-31 | 西安中交土木科技有限公司 | A kind of fixed flexible protection device for also serving as construction cofferdam |
| CN111021283A (en) * | 2020-01-16 | 2020-04-17 | 沈阳促晋科技有限公司 | Hinge type high-damping anti-collision concrete support column |
| CN210596983U (en) * | 2019-03-22 | 2020-05-22 | 中国市政工程中南设计研究总院有限公司 | Multi-functional highway pier protector |
| CN210886902U (en) * | 2019-10-14 | 2020-06-30 | 辽宁建筑职业学院 | Anti-collision device for road and bridge |
-
2020
- 2020-08-07 CN CN202010787289.1A patent/CN112064547B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999036630A1 (en) * | 1998-01-13 | 1999-07-22 | Bcc Baltic Construction Company Ab | Crash barrier especially for roads and bridges |
| KR100537357B1 (en) * | 2005-09-09 | 2005-12-16 | 주식회사 서영엔지니어링 | Vehicles anti-clash apparatus for pier safeguard |
| CN205934700U (en) * | 2016-08-08 | 2017-02-08 | 衢州市仲汇劳保用品有限公司 | Bridge girder and pier passageway guiding device |
| CN206204886U (en) * | 2016-11-02 | 2017-05-31 | 西安中交土木科技有限公司 | A kind of fixed flexible protection device for also serving as construction cofferdam |
| CN210596983U (en) * | 2019-03-22 | 2020-05-22 | 中国市政工程中南设计研究总院有限公司 | Multi-functional highway pier protector |
| CN210886902U (en) * | 2019-10-14 | 2020-06-30 | 辽宁建筑职业学院 | Anti-collision device for road and bridge |
| CN111021283A (en) * | 2020-01-16 | 2020-04-17 | 沈阳促晋科技有限公司 | Hinge type high-damping anti-collision concrete support column |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445451A (en) * | 2021-06-25 | 2021-09-28 | 南京科邦复合材料有限公司 | Anti-impact energy absorption protective guard for passenger car and manufacturing method thereof |
| CN113846590A (en) * | 2021-10-10 | 2021-12-28 | 北京工业大学 | Aluminum alloy corrugated plate-ECC plate combined anti-collision guardrail |
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|---|---|
| CN112064547B (en) | 2021-08-10 |
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