CN104594208A - Seismic hardening device for bending-shear-torsion RC component - Google Patents
Seismic hardening device for bending-shear-torsion RC component Download PDFInfo
- Publication number
- CN104594208A CN104594208A CN201410785120.7A CN201410785120A CN104594208A CN 104594208 A CN104594208 A CN 104594208A CN 201410785120 A CN201410785120 A CN 201410785120A CN 104594208 A CN104594208 A CN 104594208A
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- Prior art keywords
- bending
- component
- twisting
- pier
- bridge pier
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- 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
Abstract
The invention relates to a seismic hardening device for a bending-shear-torsion RC component. The seismic hardening device is characterized in that a group of concave-convex steel fiber reinforced concrete prefabricated shell wall sections are fixedly mounted in a plastic hinge region of the bending-shear-torsion component (pier) needing to be reinforced (to be reinforced); meanwhile, an unbonded longitudinal steel bar is arranged in each reserved hole of each prefabricated shell wall section, high-damping materials are arranged in gaps between the sections, and the unbonded longitudinal steel bars are reliably and fixedly connected with the bending-shear-torsion component (pier) needing to be reinforced at the two ends of the plastic hinge region.
Description
Technical field
The present invention relates to a kind of bending and twisting RC component anti-seismic strengthening device, be applicable to the seismic hardening of bending and twisting component, belong to civil engineering aseismatic reinforcement field.
Background technology
From seismic profile feature, China is positioned at the position that crosses of the world two violent earthquake structural belt, and a lot of area is subject to the frequently potential threat of violent earthquake.Bridge, as the multi-purpose project of transportation lifeline, once suffer seismic damage, will cause huge economic loss, and repairs extremely difficult after shake.Over nearly 40 years, due to the lesson of earthquake disaster, scholars is attached great importance to bridge earthquake resistance, carried out and studied widely.China's Tangshan Earthquake in 1976, U.S. Loma Prieta in 1989 earthquake, U.S. Northbridge in 1994 earthquake, nineteen ninety-five Japan Kobe earthquake, the Chi-Chi Earthquake in China Taiwan in 1999, China's Wenchuan earthquakes in 2008 etc. all cause the serious damage of the means of transportation such as bridge, cause huge difficulty, make lives and properties suffer very huge loss to earthquake relief work.
Bridge pier is as the main lateral resistant member of bridge, and in macroseism, damage is in various degree very common.To not waiting the irregular bridges such as high pier, the Skew Girder Bridge of unequal span and curve bridge, under geological process, its stress is complicated: skew bridge causes the twisting action of bridge pier due to the collision of bridge superstructure; Curved Beam Bridge is due to the existence of curvature, and the deviation of gravity center bridge pier of superstructure, additional bending moment effect is obvious, also will produce moment of torsion simultaneously.Therefore the bridge pier of the irregular bridge such as Skew Bridge and curve bridge usually suffers under geological process is complicated applied force state that is curved, that cut, turn round compound action, and all can produce the coupling of multiple effect due to multi-component earthquake excitation, place motion and bridge pier constraint restriction etc., all can cause bridge pier under bending and twisting compound action, produce complicated damaged pattern.Therefore, the focus that the seismic strengthening technology of bridge pier ductile ability and method are current field of civil engineering research is improved.
The major technique that current bridge pier is reinforced has: concrete section increment reinforcement means, steel plate outsourcing reinforcing method, FRP series composite materials reinforcing method etc.The most important defect of above method is exactly likely cause areas of plasticity hinge position transfer and without remarkable antitorque reinforcement ability, cause the pier column seismic damage change in location after reinforcing, if carry out reinforcing to pier column entirety can cause economic waste.
Steel fibrous concrete (SFC) is a kind of novel heterogeneous composite material that the short steel fibre mixing random distribution in ordinary concrete (RC) is formed.Compared with plain concrete, steel fibrous concrete has more superior physical and mechanical properties: the modulus of elasticity that (1) is higher and higher tension, resistance to compression, bending resistance are drawn, shear strength; (2) remarkable shock resistance; (3) cracking resistance and anti-fatigue performance excellence; (4) obviously deformation performance can be improved; (5) good toughness; (6) wear-resistant have change with freeze-thawing resistant; (7) intensity and weight ratio increase, and material cost performance is high, has superior application prospect and economy.Utilize steel fibrous concrete to carry out seismic hardening, can not only overcome ordinary concrete along with intensity increases the defect that its fragility also strengthens, and can improve the anti-seismic performance of required strenthening member (or structure) higher.
On the comprehensive basis analyzing the problems referred to above, propose patent of the present invention, for the bridge pier of the irregular RC bridge of China typical case, a kind of bending and twisting RC component anti-seismic strengthening device is provided, concrete pattern is the concavo-convex prefabrication casing wall for steel fiber concrete of segmentation, and object is that the anti-seismic performance for improving component (or structure) provides reliable technical measures with the ability resisting earthquake disaster.
Summary of the invention
The object of this invention is to provide a kind of bending and twisting RC component anti-seismic strengthening device, utilize that the dispersion of the concavo-convex steel fibrous concrete of segmentation is out of shape, the energy dissipation capacity of antitorque characteristic, high-strength performance and its inner unbonded reinforcement, required anti-seismic performance of reinforcing bending and twisting component (bridge pier etc.) can be increased substantially; The intersegmental high damping material added of adjacent housing wall in shell wall intersegmental generation relative displacement time play power consumption effect, effectively can prevent the too early surrender of unbonded reinforcement; Utilize the concavo-convex steel fibrous concrete of prefabricated segmentation, there is the fast and advantage easily of strengthening construction speed.
For achieving the above object, invention is achieved by the following technical programs.
Bending and twisting RC component anti-seismic strengthening device, the i.e. concavo-convex prefabrication casing wall for steel fiber concrete of segmentation, its composition comprises: the one group of prefabricated shell wall section being fixedly mounted on the bending and twisting component areas of plasticity hinge that need reinforce, each prefabricated shell wall section has the hole that one group of hoop spread configuration indulges muscle, soap-free emulsion polymeization longitudinal reinforcement is arranged inside the hole that vertical muscle is set, arrange high damping material in intersegmental gap, soap-free emulsion polymeization longitudinal reinforcement has with the bending and twisting component that need reinforce at areas of plasticity hinge two ends and is reliably fixedly connected with.
Advantage of the present invention.
The object of concavo-convex prefabrication casing wall for steel fiber concrete segmentation prevents from reinforcing the rear former areas of plasticity hinge upper and lower side premature rupture breakage by bending and twisting component, and former areas of plasticity hinge position changes, and can make full use of the high-strength performance of steel fibrous concrete.
The concavo-convex object of subsection prefabrication casing wall for steel fiber concrete makes reinforcing be highly resistant to moment of torsion by bending and twisting component when suffering curved, complicated applied force state that is that cut, turn round compound action afterwards.
Arrange the longitudinal reinforcement of soap-free emulsion polymeization in the concavo-convex prefabrication casing wall for steel fiber concrete of segmentation, object provides different intersegmental closing force, plays power consumption effect at failure limit state.
The high damping material arranged in intersegmental gap plays power consumption effect when the intersegmental generation relative displacement of shell wall, effectively can prevent the too early surrender of unbonded reinforcement.
The present invention can increase substantially anti-seismic performance that is curved, that cut, turn round compound action lower member, and has the fast and advantage easily of strengthening construction speed.
accompanying drawing illustrates (for bridge pier).
Fig. 1 is overall schematic three dimensional views of the present invention.
Fig. 2 is bending and twisting RC component anti-seismic strengthening device schematic three dimensional views of the present invention.
Fig. 3 is that territory, Pier of the present invention reinforces schematic three dimensional views.
Fig. 4 is that bridge pier top of the present invention reinforces schematic three dimensional views.
Fig. 5 is the intersegmental seam crossing schematic three dimensional views of SFC shell wall of the present invention.
Fig. 6 is the anti-seismic performance curve comparison diagram of the bridge pier that the bridge pier adopting the present invention to reinforce and the employing Enlargement of Section with same size and arrangement of reinforcement are reinforced.
detailed description of the invention.
Needing bending and twisting component (bridge pier) areas of plasticity hinge of reinforcing (namely waiting to reinforce), fixedly mount one group of concavo-convex prefabrication casing wall for steel fiber concrete section, inside each prefabricated shell wall section preformed hole, arrange soap-free emulsion polymeization longitudinal reinforcement simultaneously, in intersegmental gap, high damping material is set, and soap-free emulsion polymeization longitudinal reinforcement is had with the bending and twisting component (bridge pier) that need reinforce at areas of plasticity hinge two ends is reliably fixedly connected with.
Device mounting method (for reinforced bridge pier).
Position bottom territory, Pier and pier, the shock resistance reached is needed according to needing reinforced bridge pier, comprise bending resistance, shearing resistance, anti-twisting property etc., determine that the section of segmentation concavo-convex steel fibrous concrete shell wall section is high, wall thickness and shell wall height overall, and quantity, the diameter of unbonded reinforcement in shell wall.
Bending and twisting component (bridge pier) the concrete cover dabbing (emphasis is areas of plasticity hinge concrete cover) of reinforcing (namely waiting to reinforce) will be needed; bar planting on reinforced bridge pier basis simultaneously (soap-free emulsion polymeization namely arranged in shell wall indulges muscle), this soap-free emulsion polymeization is indulged bottom muscle will have reliable connection with pier footing.
The concavo-convex prefabrication casing wall for steel fiber concrete of one set of segmentation is installed in territory, Pier, and high damping material is set in intersegmental gap, then adopt high-intensity fine stone concrete or mortar to build reinforcement by connection bridge pier and the concavo-convex prefabrication casing wall for steel fiber concrete of segmentation.
The unbonded reinforcement stretched from the prefabricated shell wall preformed hole of segmentation concavo-convex steel fibrous concrete section, extend to pier coping portion (or certain altitude), realized the connection of itself and reinforced bridge pier by cast-in-place ordinary concrete or steel anchor, thus ensure that the unbonded reinforcement in the concavo-convex prefabrication casing wall for steel fiber concrete of segmentation has reliable fixed constraint on bridge pier top.
Consolidation effect calculates checking.
Two bridge piers of ABAQUS software comparative analysis same size and arrangement of reinforcement are adopted to carry out the model of reduced scale according to the ratio of 1:5, one adopts bending and twisting RC component anti-seismic strengthening device to reinforce, another adopts Enlargement of Section to reinforce, ordinary concrete strength grade is C40, and Strength of Steel Fiber Reinforced Concrete grade is C100.In the unidirectional loading of two bridge pier pier jacking row, horizontal movement is from 0 to 0.03m, as shown in Figure 6, as seen from the figure, the anti-seismic performance of the bridge pier adopting bending and twisting RC component anti-seismic strengthening device to reinforce is better than the bridge pier adopting Enlargement of Section to reinforce to the anti-seismic performance curve obtained.
Claims (1)
1. a bending and twisting RC component anti-seismic strengthening device, it is characterized in that: needing to reinforce bending and twisting component (bridge pier) areas of plasticity hinge of (namely waiting to reinforce), fixedly mount one group of concavo-convex prefabrication casing wall for steel fiber concrete section, inside each prefabricated shell wall section preformed hole, arrange soap-free emulsion polymeization longitudinal reinforcement simultaneously, in intersegmental gap, high damping material is set, and soap-free emulsion polymeization longitudinal reinforcement is had with the bending and twisting component (bridge pier) that need reinforce at areas of plasticity hinge two ends is reliably fixedly connected with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410785120.7A CN104594208A (en) | 2014-12-18 | 2014-12-18 | Seismic hardening device for bending-shear-torsion RC component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410785120.7A CN104594208A (en) | 2014-12-18 | 2014-12-18 | Seismic hardening device for bending-shear-torsion RC component |
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| Publication Number | Publication Date |
|---|---|
| CN104594208A true CN104594208A (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410785120.7A Pending CN104594208A (en) | 2014-12-18 | 2014-12-18 | Seismic hardening device for bending-shear-torsion RC component |
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| CN (1) | CN104594208A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351113A (en) * | 2016-08-28 | 2017-01-25 | 防灾科技学院 | Earthquake control system of high-speed railway bridge |
| CN107816700A (en) * | 2017-11-29 | 2018-03-20 | 宁波市鄞州龙腾工具厂 | A kind of high thermal stability lampshade |
| CN107843206A (en) * | 2017-12-20 | 2018-03-27 | 中铁二院工程集团有限责任公司 | A kind of bridge pier curvature displacement test device and method of testing |
| CN110468745A (en) * | 2019-09-02 | 2019-11-19 | 长沙理工大学 | A kind of bridge pier fastening device and its construction method |
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| JPH1150673A (en) * | 1997-08-04 | 1999-02-23 | Ohbayashi Corp | Reinforcing structure for concrete structure |
| JP3686386B2 (en) * | 2002-03-26 | 2005-08-24 | 三菱重工業株式会社 | Panel for floating pier, steel shell for floating pier, and method for manufacturing floating pier |
| CN202116975U (en) * | 2011-05-17 | 2012-01-18 | 中国地震局工程力学研究所 | Subsection prefabrication casing wall for steel fiber concrete |
| CN202482780U (en) * | 2012-03-01 | 2012-10-10 | 陈兴冲 | Carbon fiber anti-seismic structure for reinforcing bridge pier |
| CN102979042A (en) * | 2012-12-03 | 2013-03-20 | 河海大学 | Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device |
-
2014
- 2014-12-18 CN CN201410785120.7A patent/CN104594208A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1150673A (en) * | 1997-08-04 | 1999-02-23 | Ohbayashi Corp | Reinforcing structure for concrete structure |
| JP3686386B2 (en) * | 2002-03-26 | 2005-08-24 | 三菱重工業株式会社 | Panel for floating pier, steel shell for floating pier, and method for manufacturing floating pier |
| CN202116975U (en) * | 2011-05-17 | 2012-01-18 | 中国地震局工程力学研究所 | Subsection prefabrication casing wall for steel fiber concrete |
| CN202482780U (en) * | 2012-03-01 | 2012-10-10 | 陈兴冲 | Carbon fiber anti-seismic structure for reinforcing bridge pier |
| CN102979042A (en) * | 2012-12-03 | 2013-03-20 | 河海大学 | Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351113A (en) * | 2016-08-28 | 2017-01-25 | 防灾科技学院 | Earthquake control system of high-speed railway bridge |
| CN106351113B (en) * | 2016-08-28 | 2018-04-17 | 防灾科技学院 | A kind of high-speed railway bridge seismic Damage control system |
| CN107816700A (en) * | 2017-11-29 | 2018-03-20 | 宁波市鄞州龙腾工具厂 | A kind of high thermal stability lampshade |
| CN107843206A (en) * | 2017-12-20 | 2018-03-27 | 中铁二院工程集团有限责任公司 | A kind of bridge pier curvature displacement test device and method of testing |
| CN107843206B (en) * | 2017-12-20 | 2023-09-15 | 中铁二院工程集团有限责任公司 | Bridge pier curvature displacement testing device and method |
| CN110468745A (en) * | 2019-09-02 | 2019-11-19 | 长沙理工大学 | A kind of bridge pier fastening device and its construction method |
| CN110468745B (en) * | 2019-09-02 | 2024-02-09 | 长沙理工大学 | Pier reinforcing device and construction method thereof |
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Application publication date: 20150506 |