CN102494945A - Test apparatus for endurance of flexural member under load-environment coupling - Google Patents
Test apparatus for endurance of flexural member under load-environment coupling Download PDFInfo
- Publication number
- CN102494945A CN102494945A CN2011103631755A CN201110363175A CN102494945A CN 102494945 A CN102494945 A CN 102494945A CN 2011103631755 A CN2011103631755 A CN 2011103631755A CN 201110363175 A CN201110363175 A CN 201110363175A CN 102494945 A CN102494945 A CN 102494945A
- Authority
- CN
- China
- Prior art keywords
- pulling force
- reinforced concrete
- flexure
- force muscle
- concrete members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention which relates to a test apparatus for mechanical properties of a flexural member under the continuous load action belongs to the civil engineering field, wherein the test apparatus is especially suitable for occasions for testing the endurance of a reinforced concrete flexural member under the environment-load coupling action. The test apparatus comprises the reinforced concrete flexural member, a tension rib, anchoring parts and circular shaft loading rods, the anchoring parts are symmetrically arranged on two ends of the pulling force rib, the circular shaft loading rods are symmetrically arranged on the pulling force rib, and the middle horizontal segment of the pulling force rib is in parallel with the top surface of the reinforced concrete flexural member. The apparatus of the invention, which has the advantages of simple structure, convenient operation, no restriction by the size of the member, no need of pairing or bunching combination, and high strength, can satisfy loading needs of any load ratio.
Description
Technical field
The present invention relates to the test unit of flexural member mechanical property under a kind of lasting load action, be particularly useful for studying the occasion of Reinforced Concrete Members with Flexure endurancing under environment and load coupling, belong to field of civil engineering.
Background technology
Xoncrete structure is work under certain load action all, and stand multiple factor couplings such as sclerosis, infiltration, freeze thawing, chemical erosion, and the concrete durability achievement under a large amount of no load actions is the residing virtual condition of reflect structure rationally.Since half a century; Xoncrete structure causes the accident of results in premature failure, the lost of life to be on the increase owing to permanance is not enough, and especially Important Project such as dam, road, bridge, harbour and high-rise do not reach accident that design period just destroys and happen occasionally and cause tremendous economic to lose and casualties.Therefore, system carries out the permanance of xoncrete structure, member under dual or the effect of multiple-disruption factor and a great science and technology and the theoretical difficult problem that the military service performance study is current field of civil engineering.The permanance of studying xoncrete structure, member under complex environment effect and the load coupling must at first propose a cover and can consider the endurance test system that a plurality of factors act on simultaneously.
At present, the action of long-term load of Reinforced Concrete Members with Flexure under normal operating condition mainly simulated through lifting jack loading, hanging basket carry and lever load mode.There is following problem in these test units: the one, and loading needs reaction frame; Device is complicated; Institute takes up space bigger, can't put into existing simulated acceleration test equipment, like residing working environments of simulation practical structures such as freezing-thawing test machine, carbonization case, artificial environment simulation boxes; The 2nd, the member mostly prior art is to make up in groups is through the reaction frame load application; The residue bearing capacity that records member must shed to hold and carry a device and carry out slow test then; Like the disclosed technology of patent CN 201681017U; When member being carried out the ultimate bearing capacity test, will lay down the lasting load that is applied, microfracture, strain and the amount of deflection etc. that unloading back load causes are most of can be recovered, therefore; In fact measurement result does not take into full account the influence that continues load action, reflection be the result under the unloaded state; The 3rd, the scantling that the prior art charger is suitable for is very little, is primarily aimed at the small specimen test of material level, is 100 * 100 * 400mm like the maximum suitable sample dimensions of the disclosed technology of patent CN 101275982B.
Summary of the invention
The objective of the invention is to solve the shortcoming of existing flexural member action of long-term load simulation test device; A kind of simple in structure, easy to operate, advantages of small volume is provided, does not account for test space, and the test unit that changes of the Reinforced Concrete Members with Flexure life-cycle military service performance that can consider environment and load coupling simultaneously and residue bearing capacity.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention is a kind of charger that flexural member continues load action of simulating; Comprise Reinforced Concrete Members with Flexure, pulling force muscle, anchoring piece and circular shaft loading bar; The anchoring piece symmetry is fixed on the two ends of pulling force muscle; The circular shaft loading bar is symmetricly set on the pulling force muscle, and the by-level section of pulling force muscle is parallel to the end face of Reinforced Concrete Members with Flexure.
Pulling force muscle of the present invention balanced configuration is in the both sides of Reinforced Concrete Members with Flexure, and the two ends of pulling force muscle are anchored in the lower area of flexural member both sides respectively with anchoring piece, and the by-level section of pulling force muscle is higher than the end face of Reinforced Concrete Members with Flexure.
Pulling force muscle of the present invention balanced configuration is in the both sides of Reinforced Concrete Members with Flexure, and the two ends of pulling force muscle are anchored in the lower area of flexural member both sides respectively with anchoring piece, and the by-level section of pulling force muscle is lower than the end face of Reinforced Concrete Members with Flexure.
The oblique symmetry in the both sides of Reinforced Concrete Members with Flexure of the present invention offers oblique reservation through hole; The aperture of oblique reservation through hole is greater than the diameter of pulling force muscle; One of hole brings out mouth on the end face of Reinforced Concrete Members with Flexure; Other end outlet is in the lower position of side, Reinforced Concrete Members with Flexure both ends; The by-level section of described pulling force muscle is higher than the end face of Reinforced Concrete Members with Flexure, and the two ends of pulling force muscle are passed and reserved the lower area that through hole is anchored at side, flexural member both ends.
The present invention also comprises loading bearing with holes, leaves circular groove between wherein.
Be provided with the circular groove keeper between Reinforced Concrete Members with Flexure of the present invention and the circular shaft loading bar.
Reinforced Concrete Members with Flexure of the present invention (1) offers with the identical circular groove of circular shaft loading bar (4) diameter corresponding to the riding position of circular shaft loading bar (4) or is embedded with ironware.
Anchoring piece of the present invention is latch or bolt or weldment.
Pulling force muscle of the present invention is stainless steel steel strand wires or antiseptic high-durability steel wire of process or steel strand wires, and permanance does not reduce under environmental activity.
Circular shaft loading bar of the present invention is stainless steel or antiseptic high-durability steel wire of process or steel strand wires, and permanance does not reduce under environmental activity.
The lasting load of member according to the invention under normal operating condition realized through the power that is fixed on the pulling force muscle of straining on the anchoring piece and passes to the circular shaft loading bar; It is consistent with circular shaft loading bar position to continue the load action position, and the size that continues load action size and position and stretching force is confirmed by testing program.
Beneficial effect of the present invention mainly shows:
1, this charger is simple in structure, easy to operate, does not receive the restriction of scantling size, does not need member to make up in pairs or in groups;
2, not corrosion of charger, intensity are high, can satisfy the loading needs of any loading ratio;
3, do not need reaction frame to apply lasting load to member; The charger volume is little; Form integral body together with test component; Take up space hardly, can make full use of simulation member real work states such as existing durability test device such as freezing-thawing test machine, carbonization case, artificial environment simulation box, the permanance of research member under environment and load coupling;
4, need not unload test; When member being carried out the ultimate bearing capacity test, need not lay down the lasting load that is applied; Can directly carry out Mechanics Performance Testings such as continuous stress-strain, load-amount of deflection, residue bearing capacity to the member (promptly not laying down under the situation of working load) of holding the state of carrying; And the charger of lasting load loads secondary does not have effect of contraction; Can truly reflect load and environment coupled action to the influence of member life-cycle military service performance with the residue bearing capacity, fully the warranty test result discloses the overall process failure mechanism and the Damage and Failure process of reflection member under actual working state of member.
Description of drawings
Fig. 1 continues the structural representation-pulling force muscle balanced configuration of loading embodiment 1 of load in the both sides of Reinforced Concrete Members with Flexure for flexural member; Pulling force muscle horizontal segment is lower than the flexural member end face, and pulling force muscle two ends are anchored in the structural representation of the situation of the lower area of holding about the flexural member both sides respectively;
Fig. 2 continues the structural representation-pulling force muscle balanced configuration of loading embodiment 2 of load in the both sides of Reinforced Concrete Members with Flexure for flexural member; Pulling force muscle horizontal segment is higher than the flexural member end face, and pulling force muscle two ends are anchored in the structural representation of the situation of the lower area of holding about the flexural member both sides respectively.
Fig. 3 is higher than the flexural member end face for structural representation-pulling force muscle horizontal segment that flexural member continues the loading embodiment 3 of load, and the structural representation that preformed hole is anchored at the lower area situation of side, flexural member both ends is passed at pulling force muscle two ends;
Fig. 4 is the structural representation of load and environment coupled action;
The structural representation that Fig. 5 loads for the residue bearing capacity;
Fig. 6 is for loading the bearing diagrammatic cross-section;
Fig. 7 is for loading the bearing elevational schematic view;
Fig. 8 circular groove keeper synoptic diagram;
Among the figure, the 1st, Reinforced Concrete Members with Flexure, the 2nd, pulling force muscle, the 3rd, anchoring piece, the 4th, circular shaft loading bar; The 5th, oblique reservation through hole, the 6th, environmental chamber, the 7th, loading bearing with holes, the 8th, distribute crossbeam; The 9th, force transducer, the 10th, lifting jack, the 11st, reaction frame, the 12nd, circular groove keeper.
Embodiment
Below in conjunction with Figure of description technical scheme of the present invention is done further to specifically describe:
A kind of charger of simulating flexural member 1 lasting load action; Comprise that Reinforced Concrete Members with Flexure 1, pulling force muscle 2, anchoring piece 3, circular shaft loading bar 4, oblique reservation through hole 5, anchoring piece 3 symmetries are fixed on the two ends of pulling force muscle 2; Circular shaft loading bar 4 is symmetricly set on the pulling force muscle 2, and the by-level section of pulling force muscle 2 is parallel to the top surface of the beam of Reinforced Concrete Members with Flexure 1.
The power that the pulling force muscle 2 that the lasting load of member under normal operating condition is fixed on the anchoring piece 3 tension through two ends passes to circular shaft loading bar 4 realizes.It is consistent with circular shaft loading bar 4 positions to continue the load action position, and the size that continues load action size and position and power is confirmed by testing program.
The lasting load action structure of reinforced concrete flexural member 1 has multiple, the structure of following three classics of at present giving an example:
Fig. 1 continues the structural representation of the loading embodiment 1 of load for flexural member; 2 balanced configurations of pulling force muscle are in the both sides of Reinforced Concrete Members with Flexure 1; The by-level section of pulling force muscle 2 is lower than the end face of Reinforced Concrete Members with Flexure 1; Pulling force muscle 2 two ends are anchored in the lower area of flexural member two side ends respectively; Anchoring can be used methods such as latch, bolt or welding, and the power that the pulling force muscle 2 that the lasting load of member under normal operating condition is fixed on the anchoring piece 3 tension through two ends passes to circular shaft loading bar 4 realizes.
Fig. 2 continues the structural representation of the loading embodiment 2 of load for flexural member; 2 balanced configurations of pulling force muscle are in the both sides of Reinforced Concrete Members with Flexure 1; The by-level section of pulling force muscle 2 is higher than the end face of Reinforced Concrete Members with Flexure 1; Pulling force muscle 2 two ends are anchored in the lower area of flexural member two side ends respectively; Anchoring can be used methods such as latch, bolt or welding, and the power that the pulling force muscle 2 that the lasting load of member under normal operating condition is fixed on the anchoring piece 3 tension through two ends passes to circular shaft loading bar 4 realizes.
Fig. 3 continues the structural representation of the loading embodiment 3 of load for flexural member; Pulling force muscle 2 horizontal segments are higher than the flexural member end face; The oblique reservation through hole 5 that Reinforced Concrete Members with Flexure 1 is passed at pulling force muscle 2 two ends is anchored at the lower area of side, flexural member both ends; Anchoring can be used methods such as latch, bolt, ground tackle or welding, and the power that the pulling force muscle 2 that the lasting load of member under normal operating condition is fixed on the anchoring piece 3 tension through two ends passes to circular shaft loading bar 4 realizes.
For preventing that circular shaft loading bar 4 occurrence positions under the effect of pulling force muscle 2 from moving, and can adopt following 3 kinds of solutions:
The one, the riding position of the load action position circular shaft loading bar 4 when making Reinforced Concrete Members with Flexure 1 on Reinforced Concrete Members with Flexure 1 is reserved with the identical circular groove of circular shaft loading bar 4 diameters; The 2nd, when making Reinforced Concrete Members with Flexure 1 in the load action position riding position embedded iron parts of circular shaft loading bar 4, during load to be applied circular shaft loading bar 4 is welded on the embedded iron parts; The 3rd, lay between Reinforced Concrete Members with Flexure 1 and circular shaft loading bar 4 in the load action position and to have circular groove keeper 12; Contact friction force between the bottom surface through circular groove keeper 12 and the end face of Reinforced Concrete Members with Flexure 1 guarantees the fixing of circular groove keeper 12, the synoptic diagram of circular groove keeper 12 such as Fig. 8.
In concrete use, at first according to testing program requirement making flexural member and with member maintenance under standard conditions.After waiting to reach design strength, the design load active position is put and be fixed on to circular shaft loading bar 4; Be placed in pulling force muscle 2 on the circular shaft loading bar 4; By the fixing end of pulling force muscle 2 of anchoring piece 3, the other end of stretch-draw pulling force muscle 2 reaches after the design load with the fixing other end of pulling force muscle 2 of anchoring piece 3, and the size of said pulling force is confirmed by testing program.The lasting load of member is put into artificial environment simulation box 6 with the flexural member of load application after applying and finishing, the actual working state of model configuration.The flexural member (situation shown in Figure 3) that Fig. 4 is load application is put in the structural representation of load and environment coupled action in the environmental chamber 6.Certainly, the flexural member that continues load that applies that is put in the environmental chamber 6 also can be Fig. 1 or the flexural member situation that applies lasting load shown in Figure 2.After waiting to reach design age; From environmental chamber 7, take out flexural member loading bearing 7 with holes is aimed at circular shaft loading bar 6; On circular shaft loading bar 6, distribute crossbeam 8, force transducer 9, lifting jack 10 by shown in Figure 5 the layout successively; Go up at reaction frame 11 (reaction frame 11 also can be pressure or universal testing machine) at last flexural member is applied ultimate load, until structural failure.Fig. 6 is the diagrammatic cross-section of loading bearing 7 with holes, and Fig. 7 is the elevational schematic view of loading bearing 7 with holes, and the structure of loading bearing 7 with holes is shown in Fig. 6 and 7.
Come technical scheme of the present invention is elaborated through a complete concrete embodiment below:
(1) as shown in Figure 3, at first make single reinforcement rectangular reinforced concrete flexural member 1, the sectional dimension of flexural member 1 is b * h=150 * 300mm; Length 3000mm, strength grade of concrete C20 disposes 2 HRB335 reinforcing bars that diameter is 14mm; Protective seam 30mm, symmetry is reserved 2 oblique holes 5, aperture 14mm in flexural member 1/3 position; One of hole brings out mouth in flexural member 1/3 position, and the outlet of the other end in hole is in the lower position of side, flexural member both ends.With the Reinforced Concrete Members with Flexure after the moulding 1 form removal and standard curing room maintenance 28 days two days later.
When (2) acting on two loads, be 12kN, Reinforced Concrete Members with Flexure 1 is applied 50% ultimate load, i.e. 6kN according to the ultimate bearing capacity that calculates Reinforced Concrete Members with Flexure 1 in flexural member 1/3 position.At first 1/3 position on the Reinforced Concrete Members with Flexure 1 is put and be fixed on to 2 circular shaft loading bars 4; With diameter is the oblique reservation through hole 5 that 1 * 7 stainless steel tension of steel strand muscle 2 of 9.5mm penetrates Reinforced Concrete Members with Flexure 1; And place pulling force muscle 2 on the circular shaft loading bar 4, then with the fixing end of pulling force muscle 2 of latch anchoring piece 3, with the other end of punching jack tension pulling force muscle 2; Consider because flexural member its rigidity under environment and load coupling is degenerated and cause stress relaxation; Through calculating flexural member is carried out 5% ultra stretch-draw, reality applies the 27.5kN load to pulling force muscle 2, when stretching force reaches 27.5kN; Held lotus 3 minutes; The fixing anchoring piece 3 of this end of stretch-draw then, so far, the lasting load of flexural member under normal operating condition just is achieved through the power that the pulling force muscle 2 that is fixed on tension on the anchoring piece 3 passes to circular shaft loading bar 4.
(3) after the lasting load of flexural member applies and finishes, member is put into artificial environment simulation box 6, the actual working state of model configuration, as shown in Figure 4.
(4) wait to reach design age after; From environmental chamber 6, take out flexural member; Loading bearing 7 with holes is aimed at circular shaft loading bar 4; On circular shaft loading bar 4, distribute crossbeam 8, force transducer 9, lifting jack 10, go up at reaction frame 11 (reaction frame 11 also can be pressure or universal testing machine) at last flexural member is applied ultimate load, until structural failure by shown in Figure 5 the layout successively.The actual residue bearing capacity that records flexural member is 4.5kN, reduces by 25% than the bearing capacity of not considering environment and load coupling.
At last, it is also to be noted that the flexural member described in the present invention comprises Liang Heban.What more than enumerate only is several specific embodiment of the present invention; Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged; All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (10)
1. simulate the charger that flexural member continues load action for one kind; It is characterized in that; Comprise Reinforced Concrete Members with Flexure (1), pulling force muscle (2), anchoring piece (3) and circular shaft loading bar (4); Described anchoring piece (3) symmetry is fixed on the two ends of pulling force muscle (2), and circular shaft loading bar (4) is symmetricly set on the pulling force muscle (2), and the by-level section of described pulling force muscle (2) is parallel to the end face of Reinforced Concrete Members with Flexure (1).
2. like claims 1 described charger; It is characterized in that; Described pulling force muscle (2) balanced configuration is in the both sides of Reinforced Concrete Members with Flexure (1); The two ends of pulling force muscle (2) use anchoring piece (3) to be anchored in the lower area of flexural member both sides respectively, and the by-level section of described pulling force muscle (2) is higher than the end face of Reinforced Concrete Members with Flexure (1).
3. like claims 1 described charger; It is characterized in that; Described pulling force muscle (2) balanced configuration is in the both sides of Reinforced Concrete Members with Flexure (1); The two ends of pulling force muscle (2) use anchoring piece (3) to be anchored in the lower area of flexural member both sides respectively, and the by-level section of described pulling force muscle (2) is lower than the end face of Reinforced Concrete Members with Flexure (1).
4. like claims 1 described charger; It is characterized in that; The oblique symmetry in both sides of described Reinforced Concrete Members with Flexure (1) offers oblique reservation through hole (5); The aperture of described reservation through hole (5) is greater than the diameter of pulling force muscle (2), and one of hole brings out mouth on the end face of Reinforced Concrete Members with Flexure (1), and other end outlet is in the lower position of Reinforced Concrete Members with Flexure (1) side, both ends; The by-level section of described pulling force muscle (2) is higher than the end face of Reinforced Concrete Members with Flexure (1), and the two ends of pulling force muscle (2) are passed and reserved the lower area that through hole (5) is anchored at side, flexural member both ends.
5. like claims 1 described charger, it is characterized in that, also comprise loading bearing with holes (7), leave circular groove between wherein.
6. like claims 2 or 3 or 4 described chargers, it is characterized in that, be provided with circular groove keeper (12) between described Reinforced Concrete Members with Flexure (1) and the circular shaft loading bar (4).
7. like claims 2 or 3 or 4 described chargers, it is characterized in that described Reinforced Concrete Members with Flexure (1) offers with the identical circular groove of circular shaft loading bar (4) diameter corresponding to the riding position of circular shaft loading bar (4) or is embedded with ironware.
8. like claims 1 or 2 or 3 or 4 described chargers, it is characterized in that described anchoring piece (3) is latch or bolt or weldment.
9. like claims 1 or 2 or 3 or 4 described chargers, it is characterized in that described pulling force muscle (2) is stainless steel steel strand wires or antiseptic high-durability steel wire of process or steel strand wires.
10. like claims 1 or 2 or 3 or 4 described chargers, it is characterized in that described circular shaft loading bar (4) is stainless steel or antiseptic high-durability steel wire of process or steel strand wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110363175.5A CN102494945B (en) | 2011-11-16 | 2011-11-16 | Test apparatus for endurance of flexural member under load-environment coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110363175.5A CN102494945B (en) | 2011-11-16 | 2011-11-16 | Test apparatus for endurance of flexural member under load-environment coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102494945A true CN102494945A (en) | 2012-06-13 |
| CN102494945B CN102494945B (en) | 2014-08-13 |
Family
ID=46186787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110363175.5A Expired - Fee Related CN102494945B (en) | 2011-11-16 | 2011-11-16 | Test apparatus for endurance of flexural member under load-environment coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102494945B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367377A (en) * | 2017-07-14 | 2017-11-21 | 西安建筑科技大学 | Reinforced Concrete Members with Flexure bearing capacity evaluation method based on sound emission Ring-down count |
| CN111089779A (en) * | 2020-01-13 | 2020-05-01 | 中国矿业大学(北京) | Truss anchor cable anchoring performance testing device and using method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275892A (en) * | 2008-03-04 | 2008-10-01 | 东南大学 | Concrete multi-factors durability experimental device under bent tension stress and environment coupled action |
| CN101650285A (en) * | 2009-09-22 | 2010-02-17 | 同济大学 | Fatigue bending machine for concrete material |
| CN201698622U (en) * | 2009-12-14 | 2011-01-05 | 林奇 | External prestressing experiment device |
| CN102169068A (en) * | 2010-12-31 | 2011-08-31 | 扬州大学 | Loading method for concrete member flexural test |
| CN202330164U (en) * | 2011-11-16 | 2012-07-11 | 浙江建设职业技术学院 | Loading device of continuous load effect of flexural member |
-
2011
- 2011-11-16 CN CN201110363175.5A patent/CN102494945B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275892A (en) * | 2008-03-04 | 2008-10-01 | 东南大学 | Concrete multi-factors durability experimental device under bent tension stress and environment coupled action |
| CN101650285A (en) * | 2009-09-22 | 2010-02-17 | 同济大学 | Fatigue bending machine for concrete material |
| CN201698622U (en) * | 2009-12-14 | 2011-01-05 | 林奇 | External prestressing experiment device |
| CN102169068A (en) * | 2010-12-31 | 2011-08-31 | 扬州大学 | Loading method for concrete member flexural test |
| CN202330164U (en) * | 2011-11-16 | 2012-07-11 | 浙江建设职业技术学院 | Loading device of continuous load effect of flexural member |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367377A (en) * | 2017-07-14 | 2017-11-21 | 西安建筑科技大学 | Reinforced Concrete Members with Flexure bearing capacity evaluation method based on sound emission Ring-down count |
| CN107367377B (en) * | 2017-07-14 | 2019-04-02 | 西安建筑科技大学 | Reinforced Concrete Members with Flexure bearing capacity evaluation method based on sound emission Ring-down count |
| CN111089779A (en) * | 2020-01-13 | 2020-05-01 | 中国矿业大学(北京) | Truss anchor cable anchoring performance testing device and using method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102494945B (en) | 2014-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102374950B (en) | Test device for service performance of reinforced column under load and environment coupled action | |
| CN102051858B (en) | Jack loading triangular truss hanging basket and load test construction method thereof | |
| CN107036915A (en) | The experimental rig and method of FRP and Bond Performance Between Concrete are measured under a kind of Impact Load | |
| CN202330164U (en) | Loading device of continuous load effect of flexural member | |
| Zhou et al. | Partially corroded reinforced concrete piers under axial compression and cyclic loading: An experimental study | |
| CN102162774A (en) | Steel-structure distribution-girder-type double-track whole opening box girder static load test device and construction method thereof | |
| Su et al. | Flexural performance of corroded continuous RC beams rehabilitated by ICCP-SS | |
| CN109487709A (en) | The interim rope self-balancing push mode suspension bridge sling replacing underpinning device of side straddle-type | |
| CN205591398U (en) | FRP mesh grid - ECC strip reinforcing reinforced concrete shear wall | |
| CN102494945B (en) | Test apparatus for endurance of flexural member under load-environment coupling | |
| Pan et al. | Coupled effects of corrosion damage and sustained loading on the flexural behavior of RC beams strengthened with CFRP anchorage system | |
| Bindea et al. | Flat slabs with spherical voids. Part II: Experimental tests concerning shear strength | |
| CN202041399U (en) | Dead load testing device for stress of precast beam | |
| Li et al. | Effects of loading rate on reinforced concrete beams | |
| CN202330149U (en) | Test loading device for life-cycle service property of reinforced concrete column | |
| CN207047703U (en) | A kind of beam piece prestressed stretch-draw jack easy device in place | |
| CN201901847U (en) | Jack loading triangular truss hanging basket | |
| CN205352648U (en) | Shear force wall is anti -seismic performance test device under composite action is cut to stretch bending | |
| CN209584874U (en) | The interim rope self-balancing push mode suspension bridge sling replacing underpinning device of side straddle-type | |
| Amir et al. | Flexural strengthening of reinforced concrete beams with textile reinforced concrete (TRC) | |
| CN202989758U (en) | Steel wire rope support structure used on horizontal drawing cable bridge | |
| CN112666022A (en) | Steel-concrete combined beam section bending fatigue test device and method under excitation of frequency modulation simple pendulum | |
| Tao et al. | Seismic response and failure mechanism of ordinary concrete and UHTCC short columns reinforced with negative Poisson's ratio steel bars | |
| CN202849952U (en) | Bent cap pre-stress steel strand stretch-draw hanging basket | |
| CN215629410U (en) | Continuous box girder No. 0 piece pre-compaction construction equipment that encorbelments part |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20181116 |