CN110485628B - Concrete flexural member with prestressed aluminum alloy plate and bending-resistant reinforcing method - Google Patents
Concrete flexural member with prestressed aluminum alloy plate and bending-resistant reinforcing method Download PDFInfo
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- CN110485628B CN110485628B CN201910623139.4A CN201910623139A CN110485628B CN 110485628 B CN110485628 B CN 110485628B CN 201910623139 A CN201910623139 A CN 201910623139A CN 110485628 B CN110485628 B CN 110485628B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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Abstract
The application relates to a concrete flexural member with a prestressed aluminum alloy plate and a bending-resistant reinforcing method. Firstly, adopting bar-implanted type post-anchoring connection, fixing the lower edge of the aluminum alloy plate in a tensioned area of the side surface of the flexural member in a certain curvature, namely a convex mode, and fixing the end part of the aluminum alloy plate; then, the upper edge of the aluminum alloy plate is fixed and flattened by using the bar planting type rear anchoring connection. The upward prestress is applied to the bent component in the process of flattening the aluminum alloy plate, so that the bending deformation of the bent component is recovered, and the ductility and the deformability of the component are maintained and even improved while the bending bearing capacity is improved. This application has adopted to plant behind the muscle formula anchor to be connected and has transmitted the shear force between roof beam side aluminum alloy plate and the member main part that bends, can directly transmit the aluminum alloy plate internal force to the concrete member inside, the crab-bolt has certain shear deformation ability in addition, can realize the shear force internal force redistribution between each crab-bolt, avoids appearing stress concentration.
Description
Technical Field
The application relates to a flexural member, in particular to a concrete flexural member with a prestressed aluminum alloy plate and a bending-resistant reinforcing method.
Background
With the development of smelting technology, the cost of aluminum alloy is continuously reduced in recent years, the strength is continuously improved to be close to the level of building steel, and the specific strength (the ratio of the strength to the density) is more obviously higher than that of the steel. In addition, the aluminum alloy has no corrosion problem of steel, is resistant to chloride ion corrosion, and can be used for special occasions such as concrete prepared by seawater and sea sand, concrete buildings in coastal environments and the like.
The reinforcing method of the reinforced concrete flexural member which is most widely applied at present mainly comprises a beam bottom steel bonding method and a carbon fiber bonding method. The two methods can play a good role in reinforcing the beam with lower reinforcement ratio, but can cause the damage of the extra reinforcement on the beam with higher reinforcement ratio, and the brittle peeling is often generated at the end part of the steel plate or the carbon fiber sheet.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a concrete flexural member with a prestressed aluminum alloy plate and a bending-resistant reinforcing method, the aluminum alloy plate is fixed on the side surface of the reinforced concrete flexural member by using the bar-implanted rear anchoring technology, the joint work of the aluminum alloy plate and the flexural member main body is ensured by using the bar-implanted rear anchoring technology, upward prestress is applied to the flexural member in the fixing process of the aluminum alloy plate, the flexural deformation of the flexural member is recovered, and the ductility and the deformability of the member are kept or even improved while the flexural bearing capacity is improved.
In order to achieve the above object, the present application provides the following technical solutions:
a concrete flexural member with a prestressed aluminum alloy plate comprises a flexural member main body, a beam side aluminum alloy plate and a rib-embedded type rear anchoring connection;
the two beam side aluminum alloy plates are respectively covered on the compression area to the tension area of the two side surfaces of the beam side of the main body of the flexural member and are fixed through bar-implanted rear anchoring connection, and the beam side aluminum alloy plates apply upward prestress to the main body of the flexural member in the fixing process, so that the flexural deformation of the main body of the flexural member can be recovered, and the ductility and the deformability of the member can be kept or even improved while the flexural bearing capacity is improved.
Further, the lower edge of the aluminum alloy plate at the beam side is fixed in a tension area of the flexural member main body through bar-implanted type rear anchoring connection with a certain curvature;
the left end and the right end of the aluminum alloy plate on the beam side are fixedly connected with the bent member main body through bar-embedded type rear anchoring;
the upper edge of the beam side aluminum alloy plate is connected, flattened and fixed in a pressed area of the bent component main body through bar planting type rear anchoring, and the beam side aluminum alloy plate generates lifting force on the original bent component in the flattening process, so that the deformation of the beam side aluminum alloy plate is recovered, and the stress is reduced.
Furthermore, the bar-implanted rear anchoring connection comprises an anchor bolt;
corresponding anchor bolt holes are formed in the two beam side aluminum alloy plates and the bent component main body, and anchor bolts penetrate through the anchor bolt holes of the two beam side aluminum alloy plates and the bent component main body and connect the two beam side aluminum alloy plates and the bent component main body.
In this application, the bar formula back anchor connection is planted in roof beam side aluminum alloy plate adoption and is connected and fixed, can adopt the crab-bolt that link up or not link up according to actual roof beam width: when non-through anchor bolts are adopted between the anchor bolt holes and the anchor bolts, bar planting glue needs to be poured; when the through anchor bolt is adopted, glue is not injected, and extra confining pressure can be provided for concrete in the compression area.
Furthermore, the bar planting type rear anchoring connection also comprises bar planting glue;
gaps between anchor bolts and anchor bolt holes at the aluminum alloy plate at the beam side and gaps between anchor bolts and anchor bolt holes at the main body of the flexural member are filled with bar planting glue.
Furthermore, the rib-implanted rear anchoring connection also comprises a screw cap, a sealing washer and a glue injection washer; and both ends of the anchor bolt are sequentially sleeved with a glue injection gasket, a sealing gasket and a screw cap from inside to outside so as to inject the bar planting glue and fasten the aluminum alloy plate on the beam side.
Furthermore, the gap between the glue injection gasket and the anchor bolt is also filled with the bar planting glue.
Further, a stiffening rib is arranged on the pressure side of the bending member main body.
Furthermore, stiffening ribs are welded or anchored at the upper edge of the aluminum alloy plate at the beam side; alternatively, the aluminum corner is anchored at the upper edge of the aluminum alloy plate on the beam side.
The application also discloses a bending-resistant reinforcing method of the concrete flexural member with the prestressed aluminum alloy plate, which comprises the following steps:
s1, covering two beam side aluminum alloy plates on compression zones to tension zones of two side surfaces of a main beam side of a flexural member respectively;
s2, fixing the lower edge of the aluminum alloy plate at the beam side in a certain curvature manner in tension areas at the front side and the rear side of the bent member main body through rib-implanted rear anchoring connection;
s3, connecting and fixing the left end and the right end of the aluminum alloy plate on the beam side and the bent member main body through bar planting type rear anchoring;
s4, the upper edge of the aluminum alloy plate on the beam side is connected, flattened and fixed in a pressed area of the bent member main body through bar planting type rear anchoring, and the aluminum alloy plate on the beam side generates lifting force on the bent member main body in the flattening process, so that the deformation of the aluminum alloy plate is recovered, and the stress is reduced.
Further, the process of fixing by the bar planting type rear anchoring connection comprises the following steps:
sequentially passing an anchor bolt through anchor bolt holes of a first beam side aluminum alloy plate, a bent component main body and a second beam side aluminum alloy plate, and respectively extending two ends of the anchor bolt to the outer sides of the first beam side aluminum alloy plate and the second beam side aluminum alloy plate;
a glue injection gasket, a sealing washer and a screw cap are sleeved at two ends of the anchor bolt from inside to outside in sequence;
and filling gaps between anchor bolts and anchor bolt holes at the aluminum alloy plate at the beam side, gaps between anchor bolts and anchor bolt holes at the main body of the flexural member and gaps between glue injection gaskets and anchor bolts by using bar planting glue.
Compared with the prior art, the beneficial effect of this application lies in:
(1) the aluminum alloy plate is fixed on the side surface of the reinforced concrete flexural member by using the bar-implanted type post-anchoring technology, the joint work of the aluminum alloy plate and the main body of the flexural member is ensured by using the bar-implanted type post-anchoring technology, upward prestress is applied to the flexural member in the fixing process of the aluminum alloy plate, so that the flexural deformation of the flexural member is recovered, the interface stripping between a reinforcing medium and the original concrete member can be effectively avoided, the deformation of the original concrete member can be recovered by lifting the aluminum alloy plate in the fixing process of the side surface of the flexural member, and the ductility and the deformation capability of the member are kept or even improved while the flexural bearing capacity is improved.
(2) This application reinforcement technique has adopted anchor bolt after planting the muscle formula to transmit the shear force between aluminum alloy plate and the concrete component to can directly transmit the aluminum alloy plate internal force to the concrete component inside, the crab-bolt has certain shear deformation ability in addition, can realize the redistribution of shear force between each crab-bolt, avoids appearing stress concentration phenomenon.
(3) The method can be widely applied to reinforcement and transformation of structures such as buildings and bridges and post-disaster repair of earthquakes, fires and the like.
Drawings
Fig. 1 is a schematic front structural view provided in an embodiment of the present application;
FIG. 2 is a schematic top-view construction diagram provided in an embodiment of the present application;
fig. 3 is a schematic front construction diagram provided in an embodiment of the present application;
FIG. 4 is a schematic side view of the construction provided in the embodiments of the present application;
FIG. 5 is a schematic side view of an embodiment of the present disclosure;
FIG. 6 is a schematic structural view of a tendon-implanted posterior anchor connection provided in accordance with an embodiment of the present disclosure;
fig. 7 is a schematic outer surface view of the glue injection gasket according to the embodiment of the present disclosure;
fig. 8 is a schematic view of an inner surface of the glue injection gasket according to the embodiment of the present application;
wherein: 1. the beam side aluminum alloy plate 2 is connected with the embedded rib type rear anchoring part 3, a stiffening rib 21, a nut 22, a sealing washer 23, a glue injection washer 25, embedded rib glue 27, an anchor bolt 28 and a bending member main body.
Detailed Description
The present application will now be described in detail with reference to the drawings and specific examples. The present example is implemented on the premise of the technical solution of the present application, and a detailed implementation and a specific operation process are given, but the scope of the present application is not limited to the implementation operation process described below.
This application can the wide application in the reinforcement transformation of structures such as building, bridge and repair after disasters such as earthquake, conflagration, utilize anchor technique behind the planting muscle formula to be connected roof beam side aluminum alloy plate 1 and concrete flexural member main part 28 fixedly, guarantee the combined operation of roof beam side aluminum alloy plate 1 and concrete flexural member main part 28 through anchor technique behind the planting muscle formula. The beam side aluminum alloy plate 1 applies upward prestress to the bending member main body 28 during the fixing process, so that the bending deformation of the bending member main body 28 is recovered, and the ductility and the deformability of the member are maintained or even improved while the bending bearing capacity is improved.
As shown in fig. 1 to 8, a concrete flexural member with a prestressed aluminum alloy plate includes a flexural member main body 28, two beam-side aluminum alloy plates 1 and two bar-embedded rear anchor connections 2, wherein the two beam-side aluminum alloy plates 1 are respectively disposed on the front and rear side surfaces of the flexural member main body 28 and are fixed by the bar-embedded rear anchor connections 2.
In the present application, the beam-side aluminum alloy panel 1 covers a large area of the beam-side from the compression zone to the tension zone, and the compression side may be provided with the stiffener 3, and the stiffener 3 may be welded or anchored at the upper edge of the beam-side aluminum alloy panel 1, or the beam-side aluminum alloy panel 1 may be installed while anchoring the corner aluminum as the stiffener to prevent the beam-side aluminum alloy panel 1 from buckling under compression.
In the application, the lower edge of the beam side aluminum alloy plate 1 is fixed on the tension area of the flexural member main body 28 through the bar-embedded type rear anchoring connection 2 with a certain curvature, namely in a mode that the lower side of the beam side aluminum alloy plate 1 is tightly attached to the flexural member main body 28 and the upper side is convex; the left end and the right end of the beam side aluminum alloy plate 1 and the bent component main body 28 are also fixed through the bar-embedded rear anchoring connection 2; the upper edge of the beam side aluminum alloy plate 1 is flattened and fixed in a pressed area of the bent component main body 28 through the bar-embedded rear anchoring connection 2, and the beam side aluminum alloy plate 1 generates lifting force on the original bent component in the flattening process, so that the deformation of the beam side aluminum alloy plate is recovered, and the stress is reduced.
In this application, anchor is connected 2 after planting the muscle formula and is all seted up corresponding anchor bolt hole on crab-bolt 27, planting the muscle glue 25, roof beam side aluminum alloy plate 1 and the member main part 28 that bends, places crab-bolt 27 back in the anchor bolt hole, fills the space between roof beam side aluminum alloy plate 1 department crab-bolt 27 and the anchor bolt hole and the space between the member main part 28 department crab-bolt 27 that bends and the anchor bolt hole through planting the muscle glue 25.
Further, the bar-planting type rear anchoring connection 2 further comprises a screw cap 21, a sealing washer 22 and a glue injection washer 23, wherein the glue injection washer 23, the sealing washer 22 and the screw cap 21 are sleeved at two ends of the anchor bolt 27 from inside to outside in sequence so as to inject bar-planting glue and fasten the beam-side aluminum alloy plate 1; meanwhile, the gap between the glue injection gasket 23 and the anchor bolt 27 is also filled with the bar planting glue 25.
Further, the glue injection gasket 23 is provided with a fine hole for the inflow of the bar-planting glue 25.
The application also provides a method for reinforcing the concrete flexural member with the prestressed aluminum alloy plate, which comprises the following steps:
s1, covering two beam side aluminum alloy plates (1) on compression zones to tension zones of two side surfaces of a beam side of a bending member main body (28) respectively;
s2, fixing the lower edge of the aluminum alloy plate 1 at the beam side in a tension area at the front side and the rear side of the flexural member main body 28 through the rib-implanted rear anchoring connection 2 in a certain curvature mode, namely in a mode that the lower side of the aluminum alloy plate 1 at the beam side is tightly attached to the flexural member main body 28 and the upper side of the aluminum alloy plate 1 protrudes outwards;
s3, fixing the left end and the right end of the aluminum alloy plate 1 on the beam side and the bent member main body 28 through the bar-implanted rear anchoring connection 2;
s4, flattening and fixing the upper edge of the aluminum alloy plate 1 on the beam side in the compression area of the bent member main body 28 through the rib-implanted rear anchoring connection 2, and lifting the bent member main body 28 by the aluminum alloy plate 1 on the beam side in the flattening process, so that the deformation of the bent member main body is recovered, and the stress is reduced.
Further, the process of fixing by the bar-implanted rear anchor connection 2 comprises:
sequentially penetrating an anchor bolt 27 through anchor bolt holes of the first beam side aluminum alloy plate 1, the bent component main body 28 and the second beam side aluminum alloy plate 1, and enabling two ends of the anchor bolt to respectively extend to the outer sides of the first beam side aluminum alloy plate 1 and the second beam side aluminum alloy plate 1;
a glue injection gasket 23, a sealing gasket 22 and a screw cap 21 are sleeved at two ends of the anchor bolt 27 from inside to outside in sequence;
the gap between the anchor bolt 27 and the anchor bolt hole at the beam-side aluminum alloy plate 1, the gap between the anchor bolt 27 and the anchor bolt hole at the bent member main body 28, and the gap between the glue injection washer 23 and the anchor bolt 27 are filled with the bar planting glue 25.
Further, the embedded bar glue 25 can be used for filling the gap between the anchor bolt 27 and the anchor bolt hole at the glue injection gasket 23.
In this application, the bar formula back anchor is connected 2 and is connected and fixed to roof beam side aluminum alloy plate 1 adoption, can adopt according to actual roof beam width and link up or the crab-bolt 27 that does not link up: when the non-through anchor bolt 27 is adopted between the anchor bolt hole and the anchor bolt, the bar planting glue 25 needs to be poured; the through anchor bolts 27 may also be used without glue injection and may provide additional confining pressure to the concrete in the pressure zone.
Taking the common simply supported reinforced concrete beam shown in fig. 1 as an example, holes are drilled on two side surfaces of the aluminum alloy plate 1 on the beam side and the main body 28 of the flexural member according to the designed hole positions of the anchor bolts 27. After drilling holes, placing an aluminum alloy plate 1 at the beam side, firstly fixing the lower edge of the aluminum alloy plate 1 at the beam side at the tension side of the beam in a certain curvature, namely a convex mode by adopting a bar-implanted type rear anchoring connection 2, and fixing the end part of the aluminum alloy plate 1 at the beam side; then, fixing the upper edge of the aluminum alloy plate 1 at the beam side on the beam compression side according to the same method, and flattening; in order to prevent the local buckling of the compression zone of the beam-side aluminum alloy plate 1, a stiffening rib 3 may be welded to the compression edge, or an angle aluminum may be anchored as a stiffening rib while the beam-side aluminum alloy plate 1 is installed.
The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present application.
Claims (6)
1. The utility model provides a take concrete flexural member of prestressing force aluminum alloy board which characterized in that:
comprises a flexural member main body (28), a beam side aluminum alloy plate (1) and a bar-planted type rear anchoring connection (2);
the two beam-side aluminum alloy plates (1) are respectively covered on the compression area to the tension area of the two side surfaces of the beam side of the flexural member main body (28) and are fixed through the bar-implanted rear anchoring connection (2), and the beam-side aluminum alloy plates (1) apply upward prestress to the flexural member main body (28) in the fixing process, so that the flexural deformation of the flexural member main body (28) can be recovered, and the ductility and the deformability of the member can be kept or even improved while the flexural bearing capacity is improved; the lower edge of the beam side aluminum alloy plate (1) is fixed in a tension area of a flexural member main body (28) through a rib-embedded rear anchoring connection (2) with a certain curvature;
the left end and the right end of the beam side aluminum alloy plate (1) are fixed with the bent member main body (28) through the bar-embedded rear anchoring connection (2);
the upper edge of the beam side aluminum alloy plate (1) is flattened and fixed in a pressed area of the bending member main body (28) through the bar-embedded rear anchoring connection (2), and the beam side aluminum alloy plate (1) generates lifting force on the original bending member in the flattening process, so that the deformation of the beam side aluminum alloy plate is recovered, and the stress is reduced;
the bar-implanted rear anchoring connection (2) comprises an anchor bolt (27);
corresponding anchor bolt holes are formed in the two beam side aluminum alloy plates (1) and the bent component main body (28), and an anchor bolt (27) penetrates through the anchor bolt holes of the two beam side aluminum alloy plates (1) and the bent component main body (28) and connects the two beam side aluminum alloy plates (1) and the bent component main body (28);
the bar-embedded rear anchoring connection (2) also comprises a screw cap (21), a sealing washer (22) and a glue injection washer (23);
both ends of the anchor bolt (27) are sleeved with a glue injection gasket (23), a sealing gasket (22) and a screw cap (21) in sequence from inside to outside;
the bar planting type rear anchoring connection (2) also comprises bar planting glue (25);
gaps between anchor bolts (27) and anchor bolt holes at the beam side aluminum alloy plate (1), gaps between anchor bolts (27) and anchor bolt holes at the bent component main body (28) and gaps between glue injection gaskets (23) and anchor bolts (27) are filled through bar planting glue (25);
fixing an aluminum alloy plate on the side surface of a reinforced concrete flexural member by using a bar-implanted post-anchoring technology, ensuring the joint work of the aluminum alloy plate and a flexural member main body by using the bar-implanted post-anchoring technology, applying upward prestress to the flexural member in the fixing process of the aluminum alloy plate, and recovering the bending deformation of the flexural member, thereby not only avoiding the interface peeling between a reinforcing medium and the original concrete member, but also recovering the deformation of the original concrete member by lifting the aluminum alloy plate in the fixing process of the side surface of the flexural member, and maintaining or even improving the ductility and the deformation capability of the member while improving the flexural bearing capacity; the reinforcing technology adopts the bar-embedded rear anchoring bolt to transmit the shearing force between the aluminum alloy plate and the concrete component, so that the internal force of the aluminum alloy plate can be directly transmitted into the concrete component, in addition, the anchor bolts have certain shearing deformation capacity, the redistribution of the shearing force among the anchor bolts can be realized, and the stress concentration phenomenon is avoided;
specifically, the lower side of the aluminum alloy plate (1) on the beam side clings to the bent member main body (28) and the upper side protrudes outwards, and the aluminum alloy plate is fixed in a tension area of the bent member main body (28) through the rib-implanted type rear anchoring connection (2), so that upward prestress is applied to the bent member in the fixing process of the aluminum alloy plate.
2. The concrete flexural member with prestressed aluminum alloy slabs according to claim 1, characterized in that: the anchor bolt (6) adopts a non-through anchor bolt.
3. The concrete flexural member with prestressed aluminum alloy slabs according to claim 1, characterized in that: the pressure receiving side of the bending member main body (28) is provided with a stiffening rib (3).
4. The concrete flexural member with prestressed aluminum alloy slabs according to claim 3, characterized in that: a stiffening rib (3) is welded or anchored at the upper edge of the beam side aluminum alloy plate (1);
or the upper edge of the aluminum alloy plate (1) on the beam side is anchored with angle aluminum.
5. A bending-resistant reinforcing method for a concrete flexural member with a prestressed aluminum alloy plate is characterized by comprising the following steps of: the method comprises the following steps:
s1, covering two beam side aluminum alloy plates (1) on the compression area to the tension area of two side surfaces of the beam side of the bending member main body (28) respectively;
s2, fixing the lower edge of the aluminum alloy plate (1) at the beam side at the tension areas of two sides of the flexural member main body (28) through the bar-embedded rear anchoring connection (2) with a certain curvature;
s3, fixing the left end and the right end of the aluminum alloy plate (1) at the beam side and the bent member main body (28) through the bar-embedded type rear anchoring connection (2);
s4, flattening and fixing the upper edge of the aluminum alloy plate (1) on the beam side in the compression area of the bent component main body (28) through bar-embedded rear anchoring connection (2), wherein the aluminum alloy plate (1) on the beam side generates lifting force on the bent component main body (28) in the flattening process, the deformation of the bent component main body is recovered, and the stress is reduced.
6. The buckling-reinforcing method of a concrete flexural member with a prestressed aluminum alloy plate, according to claim 5, characterized in that: the process of fixation by means of a tendon-implanted posterior anchoring connection (2) comprises:
sequentially enabling anchor bolts (27) to penetrate through anchor bolt holes of the first beam side aluminum alloy plate (1), the bent component main body (28) and the second beam side aluminum alloy plate (1), and enabling two ends of the anchor bolts to respectively extend to the outer sides of the first beam side aluminum alloy plate (1) and the second beam side aluminum alloy plate (1);
a glue injection gasket (23), a sealing gasket (22) and a screw cap (21) are sleeved at two ends of the anchor bolt (27) from inside to outside in sequence;
gaps between anchor bolts (27) and anchor bolt holes at the beam side aluminum alloy plate (1), gaps between anchor bolts (27) and anchor bolt holes at the bent member main body (28) and gaps between glue injection gaskets (23) and anchor bolts (27) are filled with bar planting glue (25).
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| CN201910623139.4A CN110485628B (en) | 2019-07-11 | 2019-07-11 | Concrete flexural member with prestressed aluminum alloy plate and bending-resistant reinforcing method |
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| AU2114995A (en) * | 1994-10-19 | 1996-05-15 | Dpd, Inc. | Shape-memory material repair system and method of use therefor |
| KR100686535B1 (en) * | 2005-02-25 | 2007-02-26 | 안철승 | Method of manufacturing and construction melthod of preflex composite beem by division mode |
| CN201276790Y (en) * | 2008-10-10 | 2009-07-22 | 万水 | Wave-shaped plate web girder |
| DE102013200678A1 (en) * | 2013-01-17 | 2014-07-17 | Bayerische Motoren Werke Aktiengesellschaft | Energy absorption structure for a vehicle |
| CN105937307A (en) * | 2016-06-07 | 2016-09-14 | 江西赣粤高速公路股份有限公司 | Prestress-steel-wire-rope-bending-shearing-reinforced concrete T beam and reinforcing method thereof |
| CN108149943A (en) * | 2017-11-23 | 2018-06-12 | 同济大学 | A kind of Reinforced Concrete Members with Flexure anti-bend reinforced with anchor steel |
| CN207714794U (en) * | 2018-01-08 | 2018-08-10 | 济南大学 | A kind of anti-bend reinforced device of carbon cloth for reinforced beam |
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