CN111305049B - Self-resetting energy-consumption connecting structure of swinging pier-tie beam - Google Patents
Self-resetting energy-consumption connecting structure of swinging pier-tie beam Download PDFInfo
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- CN111305049B CN111305049B CN202010133257.XA CN202010133257A CN111305049B CN 111305049 B CN111305049 B CN 111305049B CN 202010133257 A CN202010133257 A CN 202010133257A CN 111305049 B CN111305049 B CN 111305049B
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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
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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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
- E01D2101/30—Metal
- E01D2101/34—Metal non-ferrous, e.g. aluminium
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Abstract
A self-resetting energy-dissipation connecting structure of a swing pier-tie beam belongs to the technical field of disaster prevention and shock absorption of bridge engineering structures. The steel-clad plate is composed of a swinging pier, a tie beam, a steel base plate, a steel sleeve and a Shape Memory Alloy (SMA) rod. The two ends of the tie beam are provided with an inner steel sleeve and an outer steel sleeve which are welded with the groove steel plate, and the groove steel plate is directly butted with the convex groove steel plate and is connected with the convex groove steel plate through an SMA rod. When the earthquake is small, the structure can improve the stability of the swing pier, so that the structure is kept in an elastic range; when the earthquake is large, the bridge pier is lifted away from the bridge pier, so that the bridge pier-bridge pier node is prevented from being damaged, and meanwhile, the SMA rods are lengthened to dissipate earthquake energy and provide self-resetting capability. Therefore, the structure can improve the stability of the swing pier, limit the earthquake reaction of a bridge structure and the plastic damage of the pier-tie beam node, and solve the problems that the damage and the damage of the connection node of the swing pier and the traditional cast-in-place tie beam are serious and the residual deformation is large after the earthquake action.
Description
Technical Field
The invention relates to the technical field of toughness earthquake resistance of bridge engineering, in particular to a self-resetting energy-consumption connecting structure of a swing pier-tie beam, which has small damage and easy repair of a bridge structure under the action of an earthquake.
Background
China is located between the Pacific earthquake zone and the Eurasian earthquake zone, most regions of China are earthquake zones, particularly western regions of China are strong earthquake zones, and earthquake activities are frequent. The bridge is the pivot engineering of traffic lifeline, and its construction cost is high, in case suffer earthquake to destroy, will lead to huge economic loss, and the post-earthquake restoration is extremely difficult. The number of casualties directly happening on the bridge is not large, but due to economic loss and inestimable casualties caused by damage and interruption of traffic life lines, rescue workers cannot be timely in place, and a lot of people are not rescued in time to aggravate earthquake disasters. Meanwhile, the large bridge damaged is difficult to repair, and the production and life of a disaster area and the reconstruction work after the disaster are seriously influenced. The current bridge anti-seismic design is mainly based on ductile anti-seismic design of hysteretic performance of a reinforced concrete bridge pier, but repair of damage and damage of a bridge pier plastic hinge area is difficult. Therefore, the swinging pier concept is generated at the same time, but for the double-column type or multi-column type swinging pier adopting the tie beam, the swinging of the pier under the earthquake action can cause the serious damage of the tie beam and the pier node area, and the expectation that the swinging pier limits the earthquake damage can not be really realized. Aiming at the problems, the invention provides a self-resetting energy-consumption connecting structure of a swing pier-tie beam, which applies the swing structure idea to the connecting interface of the pier and the tie beam. The connection structure can effectively release bending moment of a swinging pier-tie beam node area and dissipate earthquake energy, avoids plastic deformation of the swinging pier-tie beam node, effectively controls the reaction of the swinging pier in the earthquake, and really achieves the aim of toughness earthquake-resistant design of the bridge.
Disclosure of Invention
In order to overcome the defects, the invention provides a self-resetting energy-consumption connecting structure of a swinging pier-tie beam, wherein a groove steel base plate of the tie beam is directly butted with an inner side convex groove steel base plate of the pier and is connected only through a shape memory alloy rod, so that a swinging interface is formed between the tie beam and the pier, and the shape memory alloy rod is axially deformed along with the swinging interface. Therefore, under the action of earthquake, when the bridge pier swings, the plastic damage of the tie beam-bridge pier node is limited in the swinging interface, and meanwhile, the shape memory alloy bar provides energy consumption and self-resetting capability, so that the anti-seismic toughness of the double-column type swinging bridge pier with the tie beam is really realized.
In order to achieve the purpose, the invention provides a self-resetting energy-consumption connecting structure of a swing pier-tie beam, which mainly comprises a swing pier (1), a tie beam (2), a groove steel base plate (3), an outer steel sleeve (4), an inner steel sleeve (5), an inner convex steel base plate (6), an outer steel base plate (7), a shape memory alloy rod (8) and a screw cap (9); the bridge structure is characterized in that a tie beam (2) is arranged between the two swing piers (1), and the end parts of the swing piers (1) and the tie beam (2) are connected by adopting a groove steel base plate (3), an outer steel sleeve (4), an inner steel sleeve (5) and an inner side convex steel base plate (6), wherein the inner side convex steel base plate (6) is a steel plate with a convex part at the center of one side surface, the groove steel base plate (3) is a steel plate with a groove at the center of one side surface, the inner side convex steel base plate (6) is embedded into the swing piers (1) and is in butt contact with the tie beam (2), and the convex part extends out of a plane in butt contact with the swing piers; at the butt joint of each rocking pier (1) and the corresponding tie beam (2), a groove steel base plate (3) is fixed to the end part of the tie beam (2), and the groove is outward, so that the groove of the groove steel base plate (3) is matched with the protrusion of the protrusion steel base plate (6) at the inner side; the other side surface of the groove steel base plate (3) is provided with an outer steel sleeve (4) and an inner steel sleeve (5) which are coaxially nested and are axially vertical to the groove steel base plate (3), the outer steel sleeve (4) is embedded into the surface of the tie beam (2) and is coaxial with the tie beam (2), and the inner steel sleeve (5) and the tie beam (2) are coaxially inserted into the tie beam (2); an outer steel base plate (7) is arranged on the other side of the swing pier (1), namely the outer steel base plate (7) and the inner convex steel base plate (6) are arranged on two opposite sides of the swing pier (1), and the shape memory alloy rod (8) sequentially penetrates through the outer steel base plate (7), the inner convex steel base plate (6), the swing pier (1) and the groove steel base plate (3) and is fixed together by nuts (9) through the outer steel base plate (7), the inner convex steel base plate (6), the swing pier (1) and the groove steel base plate (3).
The groove steel backing plate (3) is directly butted with the inner side convex steel backing plate (6) and is only connected through the shape memory alloy rod (8).
The outer steel sleeve (4) and the inner steel sleeve (5) are both connected with the groove steel backing plate (3) in a welding mode and are used as local permanent templates to be poured together with beam concrete.
Further, the shape memory alloy rod (8) is located in a reserved hole channel (10) of the swing pier (1), the groove steel base plate (3), the inner side convex groove steel base plate (6) and the outer side steel base plate (7) and is screwed on the groove steel base plate (3) and the outer side steel base plate (7) through a screw cap (9), and the reserved hole channel (10) is arranged outside the diameter of the outer steel sleeve (4).
The axial lengths of the outer steel sleeve (4) and the inner steel sleeve (5) are the same, and 2 times of the axial length of the inner steel sleeve (5) is smaller than that of the tie beam (2).
The diameter of the groove steel backing plate (3) is larger than that of the inner steel sleeve (5) and smaller than that of the outer steel sleeve (4).
The invention has the beneficial effects that:
the self-resetting energy-consumption connecting structure of the swinging pier and the tie beam has the remarkable effect of improving the anti-seismic toughness of the pier-tie beam joint, and is mainly embodied in the following points:
1. the groove steel backing plate of the tie beam is directly butted with the convex groove steel backing plate at the inner side of the pier and is connected with the pier only through the shape memory alloy rod, so that a swinging interface is formed between the tie beam and the pier, and the shape memory alloy rod axially deforms along with the swinging interface. Therefore, under the action of earthquake, when the bridge pier swings, the plastic damage of the tie beam-bridge pier node is limited in the swinging interface, and meanwhile, the shape memory alloy bar provides energy consumption and self-resetting capability, so that the anti-seismic toughness of the double-column type swinging bridge pier with the tie beam is really realized.
2. The invention is easy to realize, has wide application range, can limit the earthquake damage and damage of the double-column type swing pier-tie beam node, basically can ensure that the structure is kept in the elastic range, and theoretically can directly recover the traffic function without repairing after the earthquake. Therefore, the invention has good social and economic benefits and is worth popularizing and applying.
Drawings
Fig. 1 is a schematic front view of a self-resetting energy-consuming connection structure of a rocking pier-tie beam;
fig. 2 is a schematic cross-sectional view a-a of a self-resetting energy-consuming connection structure of a rocking pier-tie beam.
Fig. 3 is a schematic cross-sectional view of a self-resetting energy-consuming connection structure of a rocking pier-tie beam.
Fig. 4 is a schematic cross-sectional view of a self-resetting energy-consuming connection structure of a rocking pier-tie beam.
Fig. 5 is a schematic cross-sectional view of a self-resetting energy-consuming connection structure of a rocking pier-tie beam.
Description of reference numerals:
1-rocking pier; 2, tying a beam; 3, a groove steel backing plate; 4-outer steel sleeve; 5-inner steel sleeve; 6, protruding a steel backing plate on the inner side; 7-outer steel backing plate; 8-a shape memory alloy rod; 9-a screw cap; 10-reserving a pore channel.
Detailed Description
On the basis of the double-column type swinging pier with the tie beam, the connecting surface of the tie beam and the pier is designed into a swinging interface, and the connecting surface is only connected through the shape memory alloy rod, so that the damage and the damage of a swinging pier-tie beam node under the action of an earthquake are limited, the dissipation capability and the self-resetting function are provided, and the anti-seismic toughness of the double-column type swinging pier with the tie beam is really realized. The structure is mainly used in the shock absorption technology of bridge engineering and river crossing engineering with higher requirement on anti-seismic toughness.
Fig. 1, fig. 2, fig. 3 and fig. 4 are specific implementation examples of a self-resetting energy-consuming connection structure of a rocking pier-tie beam, and the structure mode mainly comprises a rocking pier 1, a tie beam 2, a groove steel liner plate 3, an inner side convex steel liner plate 6 and a shape memory alloy rod 8. Fig. 5 shows a shape memory alloy rod 8 connecting a rocking pier 1 and a tie beam 2 by a nut 9.
When the invention is applied to the double-column type swinging pier with the tie beam, the two ends of the tie beam 2 are provided with the groove steel backing plates 3 which are directly butted with the inner side convex steel backing plate 6 arranged on the swinging pier 1 and are connected through the shape memory alloy rod 8. The outer steel sleeve 4 and the inner steel sleeve 5 are both connected with the groove steel backing plate 3 in a welding mode and are poured together with concrete as a local permanent template. The shape memory alloy rod 8 penetrates through the reserved hole channels 10 of the swing pier 1, the groove steel base plate 3, the inner side convex steel base plate 6 and the outer side steel base plate 7 and is anchored on the groove steel base plate 3 and the outer side steel base plate 7 through the screw caps 9.
When an earthquake occurs, the plastic deformation of the swinging pier-tie beam node is concentrated on the grooves and the convex groove steel base plates to form a swinging section, and the bending moment of the node is released. The shape memory alloy rod can assist the pier to dissipate earthquake energy, and can be used as a fuse element to be firstly damaged to effectively protect the pier, the damage is easy to find after the earthquake, the replacement time is short, and meanwhile, the self-resetting capability is provided. Therefore, the self-resetting energy-consumption connecting structure of the swinging pier and the tie beam can limit the plastic damage and the damage of the swinging pier, and plays a role in dissipating earthquake energy and providing self-resetting energy. The bridge structure applying the self-resetting energy-consumption connecting structure of the swing pier-tie beam can basically ensure that the structure is kept in an elastic range under the action of normal use load and accidental earthquake load, theoretically, the traffic function can be directly recovered without repairing after the earthquake, and the bridge structure is worthy of popularization and application in practical engineering.
Claims (5)
1. A self-resetting energy-consumption connecting structure of a swing pier-tie beam mainly comprises a swing pier (1), a tie beam (2), a groove steel base plate (3), an outer steel sleeve (4), an inner steel sleeve (5), an inner side convex steel base plate (6), an outer side steel base plate (7), a shape memory alloy rod (8) and a screw cap (9); the bridge structure is characterized in that a tie beam (2) is arranged between the two swing piers (1), and the end parts of the swing piers (1) and the tie beam (2) are connected by adopting a groove steel base plate (3), an outer steel sleeve (4), an inner steel sleeve (5) and an inner side convex steel base plate (6), wherein the inner side convex steel base plate (6) is a steel plate with a convex part at the center of one side surface, the groove steel base plate (3) is a steel plate with a groove at the center of one side surface, the inner side convex steel base plate (6) is embedded into the swing piers (1) and is in butt contact with the tie beam (2), and the convex part extends out of a plane in butt contact with the swing piers; at the butt joint of each rocking pier (1) and the corresponding tie beam (2), a groove steel base plate (3) is fixed to the end part of the tie beam (2), and the groove is outward, so that the groove of the groove steel base plate (3) is matched with the protrusion of the protrusion steel base plate (6) at the inner side; the other side surface of the groove steel base plate (3) is provided with an outer steel sleeve (4) and an inner steel sleeve (5) which are coaxially nested and are axially vertical to the groove steel base plate (3), the outer steel sleeve (4) is embedded into the surface of the tie beam (2) and is coaxial with the tie beam (2), and the inner steel sleeve (5) and the tie beam (2) are coaxially inserted into the tie beam (2); an outer steel base plate (7) is arranged on the other side of the swing pier (1), namely the outer steel base plate (7) and the inner convex steel base plate (6) are positioned on two opposite sides of the swing pier (1), a shape memory alloy rod (8) sequentially penetrates through the outer steel base plate (7), the inner convex steel base plate (6), the swing pier (1) and the groove steel base plate (3), and the outer steel base plate (7), the inner convex steel base plate (6), the swing pier (1) and the groove steel base plate (3) are fixed together by adopting a nut (9);
the groove steel backing plate (3) is directly butted with the inner side convex steel backing plate (6) and is only connected through the shape memory alloy rod (8).
2. A self-restoring energy-dissipating connecting structure of a rocking pier-tie beam according to claim 1, wherein the outer steel sleeve (4) and the inner steel sleeve (5) are welded to the recessed steel pad plate (3) and cast together with the beam tie concrete as a local permanent formwork.
3. The self-resetting energy-consuming connection structure of the rocking pier-tie beam according to claim 1, characterized in that the shape memory alloy rod (8) is positioned in the reserved hole (10) of the rocking pier (1), the groove steel backing plate (3), the inner side convex groove steel backing plate (6) and the outer side steel backing plate (7) and is screwed on the groove steel backing plate (3) and the outer side steel backing plate (7) by the screw cap (9), and the reserved hole (10) is outside the diameter of the outer steel sleeve (4).
4. A self-resetting energy-consuming connection structure of a rocking pier-tie beam according to claim 1, wherein the axial lengths of the outer steel sleeve (4) and the inner steel sleeve (5) are the same, and 2 times of the axial length of the inner steel sleeve (5) is less than that of the tie beam (2).
5. A self-resetting energy-consuming connection structure of a rocking pier-tie beam according to claim 1, wherein the groove diameter of the groove steel shim plate (3) is larger than the diameter of the inner steel sleeve (5) and smaller than the diameter of the outer steel sleeve (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010133257.XA CN111305049B (en) | 2020-03-01 | 2020-03-01 | Self-resetting energy-consumption connecting structure of swinging pier-tie beam |
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| CN202010133257.XA CN111305049B (en) | 2020-03-01 | 2020-03-01 | Self-resetting energy-consumption connecting structure of swinging pier-tie beam |
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| CN111305049A CN111305049A (en) | 2020-06-19 |
| CN111305049B true CN111305049B (en) | 2021-07-02 |
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Citations (7)
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|---|---|---|---|---|
| JP2011080293A (en) * | 2009-10-08 | 2011-04-21 | Kajima Corp | Seismic response controlled bridge pier |
| CN103422576A (en) * | 2013-09-10 | 2013-12-04 | 南京工业大学 | Reinforcement and energy dissipation damping device for wood structure mortise and tenon joint |
| CN103603431A (en) * | 2013-10-15 | 2014-02-26 | 南京工业大学 | Assembled timber structure beam column bar planting node |
| CN104452566A (en) * | 2014-10-22 | 2015-03-25 | 大连海事大学 | Swing self-reset bridge bent frame with ductility replaceable collar beam and installation method thereof |
| CN206570676U (en) * | 2016-12-15 | 2017-10-20 | 同济大学 | A kind of queen post Self-resetting power consumption bridge pier of the replaceable steel coupling beam of band |
| CN108222263A (en) * | 2017-12-22 | 2018-06-29 | 同济大学 | A kind of wooden frame beam column Self-resetting node based on marmem bolt |
| CN109853737A (en) * | 2019-01-17 | 2019-06-07 | 西安建筑科技大学 | A kind of recoverable energy consumption timber structure beam-column joint |
-
2020
- 2020-03-01 CN CN202010133257.XA patent/CN111305049B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011080293A (en) * | 2009-10-08 | 2011-04-21 | Kajima Corp | Seismic response controlled bridge pier |
| CN103422576A (en) * | 2013-09-10 | 2013-12-04 | 南京工业大学 | Reinforcement and energy dissipation damping device for wood structure mortise and tenon joint |
| CN103603431A (en) * | 2013-10-15 | 2014-02-26 | 南京工业大学 | Assembled timber structure beam column bar planting node |
| CN104452566A (en) * | 2014-10-22 | 2015-03-25 | 大连海事大学 | Swing self-reset bridge bent frame with ductility replaceable collar beam and installation method thereof |
| CN206570676U (en) * | 2016-12-15 | 2017-10-20 | 同济大学 | A kind of queen post Self-resetting power consumption bridge pier of the replaceable steel coupling beam of band |
| CN108222263A (en) * | 2017-12-22 | 2018-06-29 | 同济大学 | A kind of wooden frame beam column Self-resetting node based on marmem bolt |
| CN109853737A (en) * | 2019-01-17 | 2019-06-07 | 西安建筑科技大学 | A kind of recoverable energy consumption timber structure beam-column joint |
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| CN111305049A (en) | 2020-06-19 |
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