CN104535427A - Static loading testing method of continuous beam - Google Patents

Static loading testing method of continuous beam Download PDF

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Publication number
CN104535427A
CN104535427A CN201410773870.2A CN201410773870A CN104535427A CN 104535427 A CN104535427 A CN 104535427A CN 201410773870 A CN201410773870 A CN 201410773870A CN 104535427 A CN104535427 A CN 104535427A
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China
Prior art keywords
continuous
test
testing
load sensor
load
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CN201410773870.2A
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Chinese (zh)
Inventor
朱万旭
马聪
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Guangxi University of Science and Technology
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Guangxi University of Science and Technology
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Priority to CN201410773870.2A priority Critical patent/CN104535427A/en
Publication of CN104535427A publication Critical patent/CN104535427A/en
Pending legal-status Critical Current

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Abstract

The invention provides a static loading testing method of a continuous beam. The static loading testing method comprises the steps of assembling a testing device firstly, wherein the testing device comprises a load sensor, a screw jack, an electronic displacement meter, a reaction frame and a hydraulic jack; after connecting the testing device, arranging 70T hydraulic jacks at the midspan position of two spans of the continuous beam respectively for realizing symmetrically vertical loading, wherein the two hydraulic jacks are the same in model, arranging two 30T load sensors at the contact positions of the end parts of the jacks and the reaction frame for measuring the loading magnitudes, and arranging the load sensor under each support for measuring the reaction force value of the support during testing. The static loading testing method of the continuous beam can be used for effectively testing the continuous beam, and the testing result is accurate.

Description

A kind of static loading test method of continuous beam
Technical field
The present invention relates to a kind of static loading test method of continuous beam, belong to field of mechanical technique.
Background technology
In recent years, foreign scholar is mainly that point of penetration has carried out more correlation test research and theoretical analysis with free beam for the utilization of CFRP-PCPs composite reinforcing in xoncrete structure, but then relatively less for the experimental study of CFRP-PCPs composite rebar concrete continuous beam.And the special test figure for CFRP-PCPs composite rebar concrete continuous beam plastic internal force redistribution rule is less, also requires study to the determination of its Study on Moment Modulation of Prestressed value.
Summary of the invention
The invention provides a kind of static loading test method of continuous beam, the above defect can be overcome.
For solving above technical matters, the invention provides following technical scheme: a kind of static loading test method of continuous beam, first assembling test device, this test unit comprises load sensor, screw jack, electron displacement meter, reaction frame, hydraulic jack; After test unit is connected, respectively adopt the hydraulic jack of a 70T at continuous beam two across span centre place, carry out vertical asymmetrical load, two lifting jack models are identical, each jack end and reaction frame touching position are respectively provided with the load sensor of two 30T, be used for measure load apply size; Measured the counter-force value of each bearing of process of the test by the load sensor be arranged on below each bearing, whole process collection is carried out to the reading strain of above load sensor, and test figure is recorded on external computer; Measure two respectively across mid-span deflection value and limit, two ends support settlement value by being arranged in continuous beam two across the electron displacement meter below span centre controlling sections and above bearing cross section, limit, two ends, all displacement meters are all connected by wire and carry out whole process collection; Should first carry out white after continuous beam is in place, be then the mesh lines of 40 × 40mm with spacing is in length and breadth ejected in the side, beam side of print cartridge after white; In process of the test with eject mesh lines for reference, by the development form in comparative observation crack, corresponding fracture width and spacing under real time record load at different levels, and depict carrying out and distribution situation of crack at different levels with on the continuous beam of charcoal pencil after white, finally fracture morphology is depicted and be recorded on corresponding coordinate net ruled paper; Wherein hand-held reading glass is all adopted to observe for the reading of fracture width near each controlling sections of every one-level; The instrument that in test, all relevant datas used measure and record, instrument have all accessed corresponding acquisition system before the test and have gone forward side by side rower calmly.
The static loading test method of this continuous beam that the present invention relates to, in order to study the plastic property of CFRP-PCPs composite rebar concrete continuous beam, prepare 6 composite rebar concrete two span continuous beam test specimens altogether, by experimental study, mainly complete following relevant item work:
(1) the static load mechanical test of 6 CFRP-PCPs composite rebar concrete two span continuous beam is completed.
(2) continuous beam has been carried out observing two across the crack form near each controlling sections of span centre and middle bearing place and the regularity of distribution, load-amount of deflection change curve etc. and made analysis.
(3) at the stress performance in each stage, the change procedure of end reaction and final damage-form, observation and analysis has been carried out to continuous beam.
(4) omnidistance observational record has been carried out to strain values such as the regular reinforcement in continuous beam, CFRP-PCPs composite reinforcing and concrete.
(5) observation and analysis has been carried out to continuous beam plastic internal force redistribution phenomenon.
The static loading test method of this continuous beam that the present invention relates to, can effectively test continuous beam, test findings is accurate.
Accompanying drawing explanation
Fig. 1 is the static loading test structure drawing of device of continuous beam of the present invention;
1 load sensor I; 2 load sensor II; 3 screw jack; 4 electron displacement meters; 5 load sensor III; 6 reaction frames; 7 hydraulic jack.
Embodiment
As shown in Figure 1, first complete according to test unit assembling, this test unit comprises load sensor I1, load sensor II2, load sensor III5, screw jack 3, electron displacement meter 4, reaction frame 6, hydraulic jack 7; After test unit is connected, the hydraulic jack 7 of a 70T is respectively adopted across span centre place at continuous beam two, carry out vertical asymmetrical load, two lifting jack models are identical, each jack end and reaction frame 6 touching position are respectively provided with the load sensor of two 30T, be used for measure load apply size; Measured the counter-force value of each bearing of process of the test by the load sensor be arranged on below each bearing, whole process collection is carried out to the reading strain of above load sensor, and test figure is recorded on external computer; Measure two respectively across mid-span deflection value and limit, two ends support settlement value by being arranged in continuous beam two across the electron displacement meter below span centre controlling sections and above bearing cross section, limit, two ends, all displacement meters are all connected by wire and carry out whole process collection; Should first carry out white after continuous beam is in place, be then the mesh lines of 40 × 40mm with spacing is in length and breadth ejected in the side, beam side of print cartridge after white; In process of the test with eject mesh lines for reference, by the development form in comparative observation crack, corresponding fracture width and spacing under real time record load at different levels, and depict carrying out and distribution situation of crack at different levels with on the continuous beam of charcoal pencil after white, finally fracture morphology is depicted and be recorded on corresponding coordinate net ruled paper; Wherein hand-held reading glass is all adopted to observe for the reading of fracture width near each controlling sections of every one-level; The instrument that in test, all relevant datas used measure and record, instrument have all accessed corresponding acquisition system before the test and have gone forward side by side rower calmly.
Embodiment of the present invention does not form the restriction to the application's scope; within every spirit in the present invention's design and principle, any amendment that one of skill in the art can make, equivalent to replace and improvement etc. all should be included within protection scope of the present invention.

Claims (1)

1. a static loading test method for continuous beam, is characterized in that, first assembling test device, and this test unit comprises load sensor, screw jack, electron displacement meter, reaction frame, hydraulic jack; After test unit is connected, respectively adopt the hydraulic jack of a 70T at continuous beam two across span centre place, carry out vertical asymmetrical load, two lifting jack models are identical, each jack end and reaction frame touching position are respectively provided with the load sensor of two 30T, be used for measure load apply size; Measured the counter-force value of each bearing of process of the test by the load sensor be arranged on below each bearing, whole process collection is carried out to the reading strain of above load sensor, and test figure is recorded on external computer; Measure two respectively across mid-span deflection value and limit, two ends support settlement value by being arranged in continuous beam two across the electron displacement meter below span centre controlling sections and above bearing cross section, limit, two ends, all displacement meters are all connected by wire and carry out whole process collection; Should first carry out white after continuous beam is in place, be then the mesh lines of 40 × 40mm with spacing is in length and breadth ejected in the side, beam side of print cartridge after white; In process of the test with eject mesh lines for reference, by the development form in comparative observation crack, corresponding fracture width and spacing under real time record load at different levels, and depict carrying out and distribution situation of crack at different levels with on the continuous beam of charcoal pencil after white, finally fracture morphology is depicted and be recorded on corresponding coordinate net ruled paper; Wherein hand-held reading glass is all adopted to observe for the reading of fracture width near each controlling sections of every one-level; The instrument that in test, all relevant datas used measure and record, instrument have all accessed corresponding acquisition system before the test and have gone forward side by side rower calmly.
CN201410773870.2A 2014-12-12 2014-12-12 Static loading testing method of continuous beam Pending CN104535427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410773870.2A CN104535427A (en) 2014-12-12 2014-12-12 Static loading testing method of continuous beam

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Application Number Priority Date Filing Date Title
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104949888A (en) * 2015-06-05 2015-09-30 西安建筑科技大学 Multiscale loading device for recycled concrete long-term crack test
CN104949885A (en) * 2015-06-05 2015-09-30 西安建筑科技大学 Loading and measuring device for recycled concrete long-term deformation test
CN105043890A (en) * 2015-08-26 2015-11-11 中铁大桥局武汉桥梁特种技术有限公司 Method for testing dead load stress of concrete bridge
CN105445099A (en) * 2015-12-14 2016-03-30 榆林学院 Experiment apparatus for observing generation and development of concrete cracks
CN106197981A (en) * 2016-08-12 2016-12-07 中国航空工业集团公司沈阳发动机设计研究所 A kind of electromotor auxiliary installs joint finite element analysis charger and method
CN106644330A (en) * 2015-10-29 2017-05-10 中国电力科学研究院 Transformer substation composite material bushing anti-seismic limit bearing capacity parameter calibration method
CN109372826A (en) * 2018-12-13 2019-02-22 中国工程物理研究院化工材料研究所 A kind of linear continuous static loading control method
CN109596437A (en) * 2019-01-14 2019-04-09 中国工程物理研究院化工材料研究所 The loading force Control System Design method of the accurate loading simulator of static(al)
CN109991098A (en) * 2019-03-29 2019-07-09 辽宁工程技术大学 A kind of reconstruction Hollow Slab Beam Bridge field static test assessment method

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CN203849110U (en) * 2014-03-04 2014-09-24 湖南工业大学 Eccentric compression column non-unloading strengthening testing device

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104949888A (en) * 2015-06-05 2015-09-30 西安建筑科技大学 Multiscale loading device for recycled concrete long-term crack test
CN104949885A (en) * 2015-06-05 2015-09-30 西安建筑科技大学 Loading and measuring device for recycled concrete long-term deformation test
CN105043890A (en) * 2015-08-26 2015-11-11 中铁大桥局武汉桥梁特种技术有限公司 Method for testing dead load stress of concrete bridge
CN105043890B (en) * 2015-08-26 2017-11-17 中铁大桥局武汉桥梁特种技术有限公司 The method for testing concrete-bridge dead-load stress
CN106644330A (en) * 2015-10-29 2017-05-10 中国电力科学研究院 Transformer substation composite material bushing anti-seismic limit bearing capacity parameter calibration method
CN106644330B (en) * 2015-10-29 2018-03-30 中国电力科学研究院 A kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter
CN105445099A (en) * 2015-12-14 2016-03-30 榆林学院 Experiment apparatus for observing generation and development of concrete cracks
CN106197981A (en) * 2016-08-12 2016-12-07 中国航空工业集团公司沈阳发动机设计研究所 A kind of electromotor auxiliary installs joint finite element analysis charger and method
CN109372826A (en) * 2018-12-13 2019-02-22 中国工程物理研究院化工材料研究所 A kind of linear continuous static loading control method
CN109372826B (en) * 2018-12-13 2020-03-24 中国工程物理研究院化工材料研究所 Linear continuous static force loading control method
CN109596437A (en) * 2019-01-14 2019-04-09 中国工程物理研究院化工材料研究所 The loading force Control System Design method of the accurate loading simulator of static(al)
CN109596437B (en) * 2019-01-14 2021-04-02 中国工程物理研究院化工材料研究所 Design method of loading force control system of static force accurate loading simulation device
CN109991098A (en) * 2019-03-29 2019-07-09 辽宁工程技术大学 A kind of reconstruction Hollow Slab Beam Bridge field static test assessment method

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