CN212641179U - Connecting joint structure of rear steel longitudinal beam and old concrete cross beam - Google Patents
Connecting joint structure of rear steel longitudinal beam and old concrete cross beam Download PDFInfo
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- CN212641179U CN212641179U CN202021561999.4U CN202021561999U CN212641179U CN 212641179 U CN212641179 U CN 212641179U CN 202021561999 U CN202021561999 U CN 202021561999U CN 212641179 U CN212641179 U CN 212641179U
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Abstract
The invention relates to a connecting node structure of a rear longitudinal steel beam and an old concrete beam, which comprises an outer-coated steel plate, finish-rolled twisted steel and implanted steel, wherein the outer-coated steel plate is uniformly distributed outside the two longitudinal side surfaces of the old concrete beam, a plurality of longitudinal through holes are formed in the top edge and the bottom edge of the outer-coated steel plate at intervals along the transverse direction, the outer-coated steel plates on the two sides are locked by nuts after the two ends of the finish-rolled twisted steel respectively penetrate through the corresponding longitudinal through holes on the two sides, a plurality of steel-planting holes are formed in the middle of the outer-coated steel plate, the steel-planting holes on the old concrete beam are provided with drill holes coaxial with the steel-planting holes, the inner ends of the implanted steel are inserted into the drill holes through the steel-planting holes, the end part of the rear longitudinal steel beam is welded with the outer side surface of the outer-coated steel plate, an epoxy mortar, and the rear steel longitudinal beam, the outer steel plate and the old concrete beam are stressed together, so that the bearing capacity of the longitudinal and transverse beam nodes is improved.
Description
Technical Field
The invention relates to a connecting node structure of a rear steel longitudinal beam and an old concrete cross beam.
Background
The suspension bridge way in the middle and lower arch bridge built in the early stage is mainly made of concrete cross beams due to economic consideration, and the running way plate is directly placed on the top surface of the concrete cross beam or a small support on the top surface, so that a floating running system is formed. Because longitudinal connection is lacked among the cross beams, the suspension bridge system has poor integrity and small rigidity, the structure deforms and vibrates greatly under the action of a vehicle, and the structural comfort is deficient; meanwhile, under the action of earthquake, the transverse bridge direction and the longitudinal bridge direction can swing, and the robustness is weak. Once the hanger rod is broken, the bridge is easy to fall off, causing serious accidents. Therefore, in recent years, large longitudinal beam connections are often arranged between cross beams of the rear arch bridge.
China is a big country of arch bridges and a large number of arch bridges of the through type exist. The concrete cross beams in the bridge suspension bridge way system lack connection, so that the structural comfort degree and the risk resistance are improved, the service life of the bridge is prolonged, and the technical problem of key consideration in engineering reconstruction is solved. The steel longitudinal beams are additionally arranged between the cross beams to solve the problem effectively, but the structural reliability of the connecting nodes between the new and old longitudinal cross beams is the key for ensuring the integral stress of the structure.
Disclosure of Invention
The invention provides a connecting node structure of a rear steel longitudinal beam and an old concrete cross beam.
The invention adopts the scheme that a connecting node structure of a rear steel longitudinal beam and an old concrete cross beam comprises an outer-coated steel plate, finish-rolled deformed steel bars and implanted steel bars, wherein the outer-coated steel plate is uniformly distributed outside the two longitudinal side surfaces of the old concrete cross beam, a plurality of longitudinal through holes are arranged at intervals along the transverse direction on the top edge and the bottom edge of the outer-coated steel plate, the outer-coated steel plates at the two sides are locked by nuts after the two ends of the finish-rolled deformed steel bars respectively penetrate through the corresponding longitudinal through holes at the two sides, the finish-rolled deformed steel bars are positioned outside the top edge and the bottom edge of the old concrete cross beam, a plurality of connecting angle steels parallel to the finish-rolled deformed steel bars are arranged at intervals along the transverse direction between the top edge and the bottom edge of the outer-coated steel plates at the two sides, the two ends of the connecting angle steels are welded with the outer-coated steel plates at the, the inner of the implanted steel bar penetrates through the implanted steel bar hole to be inserted into the drill hole, epoxy mortar is injected into a gap between the outer wrapping steel plate and the outer surface of the old concrete beam at high pressure, the end part of the steel longitudinal beam is welded with the outer side surface of the outer wrapping steel plate, the top edge and the bottom edge of the old concrete beam are poured with an epoxy mortar layer to be filled, and the finish-rolled threaded steel bar and the connecting angle steel are wrapped in the epoxy mortar layer.
Further, it has the steel sheet of putting more energy into to establish the welding of steel longeron tip and outsourcing steel sheet junction after, the steel sheet of putting more energy into sets up a plurality of at junction circumference equipartition, and the welding of vertical welding has the angle steel of putting more energy into in outsourcing steel sheet lateral surface middle part, lies in the steel sheet of putting more energy into and the angle steel welding of putting more energy into between steel longeron and the angle steel of.
Furthermore, the outer side surfaces of the top end and the bottom end of the outer steel plate are flush with the outer side surface of the epoxy mortar layer at the same side.
Furthermore, the middle part of the inner side surface of the outer coated steel plate protrudes outwards to form a groove for accommodating the old concrete beam.
Furthermore, the implanted steel bars are welded with the outer steel plate and bonded with the old concrete beam through chemical binders.
Compared with the prior art, the invention has the following beneficial effects: simple structure, construction convenience establishes the common atress of steel longeron, outsourcing steel sheet and old concrete beam after, has improved vertical and horizontal beam node bearing capacity.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a general layout of a configuration of connected nodes;
FIG. 2 is a node elevation of the implementation structure of FIG. 1;
FIG. 3 is a node side view of the implementation of FIG. 1;
fig. 4 is a node plan view of the implementation structure of fig. 1.
In the figure: 1-a steel stringer; 2-wrapping a steel plate; 3-finish rolling the twisted steel; 4-stiffening steel plates; 5-stiffening angle steel; 6, implanting steel bars; 7-epoxy mortar layer; 8-connecting angle steel; 9-old concrete beam.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in figures 1-4, a connecting node structure of a rear steel longitudinal beam and an old concrete beam comprises an outer-coated steel plate 2, finish-rolled twisted steel 3 and embedded steel 6, wherein the outer-coated steel plate is uniformly distributed on the outer side of two longitudinal side surfaces of the old concrete beam 9, a plurality of longitudinal through holes are formed in the top edge and the bottom edge of the outer-coated steel plate at intervals along the transverse direction, the outer-coated steel plates on the two sides are locked by nuts after the two ends of the finish-rolled twisted steel respectively penetrate through the corresponding longitudinal through holes on the two sides, the finish-rolled twisted steel is positioned on the outer sides of the top edge and the bottom edge of the old concrete beam, a plurality of connecting angle steels 8 parallel to the finish-rolled twisted steel are arranged between the top edge and the bottom edge of the outer-coated steel plate on the two sides at intervals along the transverse direction, the two ends of the connecting angle steels are welded with the outer, the inner of implantation reinforcing bar passes in the bar planting hole inserts the drilling, and epoxy mortar is poured into to the gap department high pressure between outsourcing steel sheet and the old concrete crossbeam surface, establishes the welding of steel longeron tip and outsourcing steel sheet lateral surface after, and the top edge and the bottom edge of old concrete crossbeam pour epoxy mortar layer 7 and fill and level, and finish rolling twisted steel and angle connector parcel are in the epoxy mortar in situ.
In this embodiment, establish the welding of steel longeron tip and outsourcing steel sheet junction after with and have stiffening steel plate 4, stiffening steel plate sets up a plurality of at junction circumference equipartition, and vertical welding has stiffening angle steel 5 along outsourcing steel sheet lateral surface middle part, and stiffening steel plate and the stiffening angle steel welding that are located between steel longeron and the stiffening angle steel strengthen node strength and rigidity.
In this embodiment, all flush with the epoxy mortar layer lateral surface of homonymy on outsourcing steel sheet top, bottom lateral surface.
In this embodiment, the angle steel is used for enhancing the connection strength and rigidity between two outer steel plates, the stiffening angle steel and part of the angle steel form the outer steel plates into a ring and stiffen, the node strength and rigidity are further enhanced, and the angle steel is wrapped in the epoxy mortar layer.
In this embodiment, the outsourcing steel sheet medial surface middle part evagination forms the recess of holding old concrete beam.
In the embodiment, the implanted steel bars are welded with the outer steel plate and bonded with the old concrete beam through chemical bonding agents.
The construction steps are as follows:
step 1: removing the sidewalk slab on the concrete beam, measuring the actual distance between the beams, prefabricating a steel longitudinal beam and an externally-wrapped steel plate in a factory, reserving longitudinal through holes at the upper edge and the lower edge of the externally-wrapped steel plate, reserving a rib planting hole in the middle of the externally-wrapped steel plate, and welding a stiffening steel plate and a stiffening angle steel at the joint of the end part of the steel longitudinal beam and the externally-wrapped steel plate to form a whole;
step 2: erecting the integral temporary hoisting formed in the step 1 on a preset position of a concrete beam;
and step 3: penetrating the finish-rolled twisted steel bars through the reserved holes on the upper and lower edges of the outer-coated steel plates, and then connecting and locking the outer-coated steel plates on two sides of the concrete beam through nuts;
and 4, step 4: a plurality of connecting angle steels parallel to the finish rolling threaded steel bars are arranged between the top edge and the bottom edge of the outer wrapping steel plate at intervals along the transverse direction, and two ends of each connecting angle steel are welded with the outer wrapping steel plate at the same side;
and 5: drilling holes on the concrete beam according to the designed position, inserting the inner ends of the implanted steel bars into the drilled holes through the implanted steel bar holes, welding the implanted steel bars with the outer steel plate, and bonding the implanted steel bars with the old concrete beam by using a chemical binder;
step 6: injecting epoxy mortar into a gap between the outer steel plate and the concrete beam at high pressure;
and 7: pouring epoxy mortar on the upper and lower edges of the concrete beam, and wrapping the finish rolling threaded ribs and the connecting angle steel;
and 8: and installing the sidewalk plate again in place to complete the construction of the connecting joint.
If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a after establish steel longeron and old concrete beam's connected node structure which characterized in that: the steel bar-embedded type concrete beam comprises an outer-wrapped steel plate, finish-rolled twisted steel bars and embedded steel bars, wherein the outer-wrapped steel plate is uniformly arranged outside two longitudinal side surfaces of an old concrete beam, a plurality of longitudinal through holes are formed in the top edge and the bottom edge of the outer-wrapped steel plate at transverse intervals, two ends of the finish-rolled twisted steel bars penetrate through the corresponding longitudinal through holes in the two sides respectively and then are locked by nuts, the finish-rolled twisted steel bars are positioned outside the top edge and the bottom edge of the old concrete beam, a plurality of connecting angle steels parallel to the finish-rolled twisted steel bars are arranged between the top edge and the bottom edge of the outer-wrapped steel plate in the transverse intervals, two ends of the connecting angle steels are welded with the outer-wrapped steel plates at the same side, a plurality of embedded steel bar holes are formed in the middle of the outer-wrapped steel plate, drilling holes coaxial with the embedded steel bar holes are formed in the embedded steel bars, and the end part of the rear steel longitudinal beam is welded with the outer side surface of the outer steel plate, an epoxy mortar layer is poured on the top edge and the bottom edge of the old concrete beam for filling, and the finish-rolled twisted steel and the connecting angle steel are wrapped in the epoxy mortar layer.
2. The connection node structure of the rear steel longitudinal beam and the old concrete cross beam according to claim 1, characterized in that: establish the welding of steel longeron tip and outsourcing steel sheet junction after, the steel sheet of putting more energy into sets up a plurality of at junction circumference equipartition of putting more energy into, and vertical welding has stiffening angle steel, the steel sheet of putting more energy into that lies in between steel longeron and the stiffening angle steel welds with stiffening angle steel along vertical welding outsourcing steel sheet lateral surface middle part.
3. The connection node structure of the rear steel longitudinal beam and the old concrete cross beam according to claim 1, characterized in that: the outer side surfaces of the top end and the bottom end of the outer-coated steel plate are flush with the outer side surface of the epoxy mortar layer at the same side.
4. The connection node structure of the rear steel longitudinal beam and the old concrete cross beam according to claim 1, characterized in that: the middle part of the inner side surface of the outer wrapping steel plate protrudes outwards to form a groove for accommodating the old concrete beam.
5. The connection node structure of the rear steel longitudinal beam and the old concrete cross beam according to claim 1, characterized in that: the implanted steel bars are welded with the outer steel plate and bonded with the old concrete beam through chemical binders.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021561999.4U CN212641179U (en) | 2020-07-31 | 2020-07-31 | Connecting joint structure of rear steel longitudinal beam and old concrete cross beam |
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| CN202021561999.4U CN212641179U (en) | 2020-07-31 | 2020-07-31 | Connecting joint structure of rear steel longitudinal beam and old concrete cross beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749121A (en) * | 2020-07-31 | 2020-10-09 | 福州大学 | Connecting joint structure of rear steel longitudinal beam and old concrete cross beam and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749121A (en) * | 2020-07-31 | 2020-10-09 | 福州大学 | Connecting joint structure of rear steel longitudinal beam and old concrete cross beam and construction method |
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