CN203412189U - Corrugated steel web-plate beam structure for improving fatigue resistance - Google Patents
Corrugated steel web-plate beam structure for improving fatigue resistance Download PDFInfo
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- CN203412189U CN203412189U CN201320514621.2U CN201320514621U CN203412189U CN 203412189 U CN203412189 U CN 203412189U CN 201320514621 U CN201320514621 U CN 201320514621U CN 203412189 U CN203412189 U CN 203412189U
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- stiffener
- plate
- fatigue resistance
- wavelike steel
- steel webplate
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Abstract
The utility model discloses a corrugated steel web-plate beam structure for improving fatigue resistance. The corrugated steel web-plate beam structure comprises two flange plates (2) and a corrugated web-plate (1) between the two flange plates (2), wherein the outer side of at least one flange plate (2) is provided with a reinforcing plate (3); the projection of the reinforcing plate (3) on the flange plate (2) is corrugated. The corrugated steel web-plate beam structure disclosed by the utility model has the advantages that due to adoption of the structure, the stress concentration of the flange plates of a steel beam near the inclined section of the corrugated web-plate and the transition part of the inclined section and the flat and straight section of the corrugated web-plate can be effectively relieved, so that the fatigue resistance of the corrugated steel web-plate beam is improved.
Description
Technical field
The utility model relates to building and bridge construction field, specifically a kind of Wavelike steel webplate girder construction that improves fatigue resistance.
Background technology
For build with the welding Wavelike steel webplate beam of bridge under arms the cycle usually bear alternation cyclic reverse loading, be necessary the fatigue safety of Wavelike steel webplate and girder steel frange plate connecting portion to take into full account.Wavelike steel webplate girder steel is mainly welded by corrugated sheet steel and girder steel frange plate.Because Wavelike steel webplate has higher shear buckling intensity, and under longitudinal tensile metamorphosis, there is the free-extension feature that is similar to accordion effect, so the tensile stress that planar moment of flexure produces is mainly born by girder steel frange plate.Textural, the tilting section of Wavelike steel webplate and the direction of longitudinal tension stress are certain angle of cut, and the stress that makes to transmit on steel frange plate flows to this and is subject to certain obstruction, and neighbour attachment weld region again, this place, causes stress raisers thus simultaneously.When this angle of cut is larger, between Wavelike steel webplate tilting section and girder steel frange plate edge, the stress in region is concentrated more outstanding, more easily forms structural fatigue weak part, causes too early generation fatigue failure.
In the application of steel-mixed compound beam, web is connected with the upper and lower bridge deck of concrete, and its connecting portion is most important tectonic position, have good capacity transfer function horizontal shear and the opposing moment of flexure vertical with longitudinal direction longitudinally, to guarantee compound beam safety.Flange-shaped shear connector can provide good supporting capacity with opposing transverse bending moment and longitudinal shear effect, in steel-concrete composite beam by more employing.If Patent Office of the People's Republic of China is in the utility model of an application number 201020185948.6 utility model title < < shear connector > > of 2010.12.15 bulletin, adopt directly on Wavelike steel webplate perforate and on corrugated sheet steel welded flange plate form.But the Fatigue Test Research of recent domestic is found, on the tension girder steel frange plate being connected with Wavelike steel webplate, still easily produce fatigue cracking and affected the fatigue strength of compound beam, and existing method is mainly to guarantee static(al) security intensity, but more do not relate to the fatigue behaviour problem of beam.
Experience shows, because stress is concentrated and caused fatigue crack after germinating, to cause the fatigue cracking at attachment weld place under alternate stress (as: wheel load) effect on the girder steel frange plate being connected with web, harm is large and repair difficulty.In addition,, when the welding of processing and fabricating, if welding itself exists local incomplete fusion part, often easily form natural initial crack and develop into formation of crack, aggravation fatigue cracking.
Utility model content
The utility model provides a kind of Wavelike steel webplate girder construction that improves fatigue resistance, for the larger situation of the Wavelike steel webplate tilting section angle of cut, the frange plate that has solved Wavelike steel webplate beam in the past easily occurs that at corrugated web tilting section and with near the attachment weld place intermediate location of flat segments stress concentrates, and causing fatigue cracking, harm is large and repair difficult; Meanwhile, there is local incomplete fusion part in welding itself, often easily forms natural initial crack and develop into formation of crack, and local outstanding stress is concentrated the problem that causes fatigue cracking aggravation.
The utility model is that technical solution problem is achieved through the following technical solutions: a kind of Wavelike steel webplate girder construction that improves fatigue resistance, comprise two blocks of frange plates and be arranged on two corrugated webs between frange plate, corrugated web comprises longitudinal flat segments and tilting section, the outside of described at least one block of frange plate is provided with stiffener, and described stiffener is projected as waveform on frange plate.Planar under Moment, often the bottom wing listrium with girder steel bears tensile stress, and girder steel frange plate upper stress concentrate position multidigit in corrugated web tilting section and with the intermediate location of flat segments near, thereby easily cause fatigue failure to occur in these regions, after increasing stiffener, when tensile stress stream transmits on girder steel tension frange plate, Wavelike steel webplate and stiffener can carry out layer to shunting to the tensile stress stream in tension frange plate preferably, thereby well alleviating girder steel frange plate concentrates at the tilting section of Wavelike steel webplate and with near the stress intermediate location of flat segments, generally, what corrugated web adopted with frange plate is that weld seam is connected, on frange plate, can form weld seam, stiffener also can be connected by weld seam with frange plate, connected mode can be that angle seam welding can be also butt joint welding, can the employing welding manner identical with the welding of corrugated web and frange plate.
Further, described stiffener is perpendicular to frange plate.Stiffener perpendicular to frange plate after, can realize better tensile stress layer to shunting.
Further, projection and the corrugated web projection on frange plate of described stiffener on frange plate is positioned in same coordinate axes, and differs 1/2 wavelength.Stiffener becomes reverse symmetry with corrugated web, i.e. the trough of the corresponding corrugated web of the crest of stiffener, and the crest of the corresponding corrugated web of the trough of stiffener, and tensile stress shunting effect is now preferably.
Further, also comprise some WELDING STUDS, described WELDING STUDS laterally runs through stiffener.When this part applies to steel-concrete combination beam structure, the effect of WELDING STUDS and perforated rebar is to make the stiffener embedding can better resist horizontal shear, improves the crack resistance of concrete slab, improves the durability of structure.
Further, described WELDING STUDS is through the flat segments of stiffener, and WELDING STUDS is vertical with the flat segments of stiffener.Because the WELDING STUDS through stiffener flat segments is vertical with edge of a wing longitudinal tension stress direction, the effect of its opposing shearing of performance that can larger limit.Meanwhile, at stiffener tilting section, WELDING STUDS is not set, can avoid leaning on too closely with longitudinal perforated rebar, and the structure causing is difficult.
Further, also comprise some perforated rebars, described perforated rebar is longitudinally through the tilting section of stiffener, and perforated rebar is vertical with WELDING STUDS.
Further, tilting section and the handing-over of the corner between the flat segments position of described Wavelike steel webplate and corresponding stiffener adopt arc transition, and the radius of curvature of this circular arc is equal to or greater than half of parallel distance between two adjacent flat segments.In this programme, between said two adjacent flat segments, parallel distance is the peak-to-peak value of corrugated web or stiffener place waveform, i.e. the absolute value sum of positive negative peak.
Further, described stiffener is provided with breach, and this indentation, there is connected with transiting arc plate, described in cross arc plate place radius of a circle and be equal to or greater than 150mm.Be subject to the impact of structure, the suffered tensile stress of frange plate of different sections varies in size, the frange plate that is some region need to arrange stiffener, the frange plate in other region is without stiffener is set, in order to make two regions have certain transition, transiting arc plate is set, the direction arranging has certain being particular about, preferably transiting arc plate is arranged on along longitudinal tension stress direction (the longitudinal length direction of beam, be the direction vertical with beam cross section), avoid, due to the obstruction of transiting arc plate to steel frange plate upper stress stream, causing unnecessary stress to concentrate; The setting of transiting arc plate is to make transition of stress mild in addition, avoid stress to concentrate, and the too small meeting of radius makes this transition can not get good performance, causes on the contrary unnecessary stress to concentrate; The material of transiting arc plate can be consistent with the material of stiffener.
The utility model compared with prior art has the following advantages and beneficial effect:
(1) the utility model becomes antisymmetric waveform stiffener by arranging with Wavelike steel webplate, effectively having alleviated girder steel frange plate concentrates at corrugated web tilting section and with near the stress intermediate location of flat segments, thus, effectively improved the fatigue resistance of Wavelike steel webplate beam.
(2) the utility model arranges WELDING STUDS on stiffener, thereby strengthened the resistivity of horizontal shear in concrete frange plate, met the requirement of horizontal shear in opposing concrete frange plate, increase again perforated rebar longitudinally, form steel concrete shear-pin together with WELDING STUDS, further strengthen the opposing to horizontal shear.
(3) while being prefabricated in the factory, can employing material and the mode identical with Wavelike steel webplate and attachment weld thereof make waveform stiffener, make easy to process; And when existing Wavelike steel webplate beam is transformed, can carry out being the setting of antisymmetric waveform stiffener with Wavelike steel webplate in the girder steel tension frange plate outside of corresponding site, structure construction transformation is easy.
(4) the utility model makes waveform stiffener be antisymmetry layout along the wide center line of girder steel tension frange plate, can reduce preferably tension frange plate produces after welding one side corrugated sheet bird caging and distortion.
(5) the technical solution of the utility model designability and good economy performance, adapt to span carried out to segmentation transformation compared with the tired rapid wear section of crossbeam, also can carry out local antifatigue reinforcement to existing Wavelike steel webplate girder construction.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of embodiment 1 of the present utility model;
Fig. 2 is the structural representation of the stiffener of embodiment 1 of the present utility model;
Fig. 3 is the overall structure schematic diagram of embodiment 6 of the present utility model;
Fig. 4 is the overall structure schematic diagram of embodiment 8 of the present utility model;
Fig. 5 be the tension stress region of Wavelike steel webplate girder construction before structure improves with improvement after fatigue data comparison diagram.
The specific embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment 1:
As Fig. 1, shown in Fig. 2, the present embodiment comprises two blocks of frange plates 2 and is arranged on two corrugated webs 1 between frange plate 2, the outside of at least one block of frange plate 2 is provided with stiffener 3, between stiffener 3 and frange plate 2, by weld seam 4, be connected, stiffener 3 is projected as waveform on frange plate 2, because the tensile stress that moment-in-plane produces is mainly born by frange plate 2, often only have a side of frange plate 2 can be subject to tensile stress, and opposite side is extruding force, therefore only stiffener 3 is arranged on to a side of frange plate 2 tension stress, stressed by corrugated web 1 and stiffener 3, can realize the shunting of tensile stress, be on frange plate 2, to there will not be the concentrated situation of stress, thereby can effectively improve the fatigue resistance of Wavelike steel webplate beam.In addition, if the frange plate 2 equal tension stress in both sides all arrange stiffener 3 in the outside of two blocks of frange plates 2, reach the tensile stress of simultaneously shunting both sides.
Embodiment 2:
The present embodiment, on the basis of embodiment 1, makes stiffener 3 perpendicular to frange plate 2, improves the tensile stress shunting effect on 3 pairs of frange plates 2 of stiffener.
Embodiment 3:
The present embodiment is on the basis of embodiment 2, projection and corrugated web 1 projection on frange plate 2 of stiffener 3 on frange plate 2 is positioned in same coordinate axes, and differ 1/2 wavelength, two projections differ half wavelength, just make the trough of the corresponding corrugated web 1 of crest of stiffener 3, the crest of the corresponding corrugated web 1 of trough of stiffener 3,3 one-tenth antisymmetry of corrugated web 1 and stiffener, can to tensile stress, shunt better, alleviate girder steel frange plate and concentrate at corrugated web tilting section and with near the stress intermediate location of flat segments.
Embodiment 4:
The present embodiment makes further improvements on the basis of embodiment 3, in order to strengthen the resistivity of horizontal shear in concrete frange plate, increases some WELDING STUDS 5 on stiffener 3, and WELDING STUDS 5 laterally runs through stiffener 3.
Embodiment 5:
The present embodiment, at the enterprising one-step optimization in the basis of embodiment 4, is specially: make WELDING STUDS 5 by melting welding or penetrate the mode of weldering and stiffener 3 fixing, WELDING STUDS 5 is through the flat segments of stiffener 3, and vertical with flat segments; In addition, also can perforate on stiffener 3, the shape in hole can be the shapes such as unitary circular, opening be circular, oval, trapezoidal, and then WELDING STUDS 5, through hole, forms steel concrete shear-pin with the larger horizontal shear of opposing together with concrete.
Embodiment 6:
As shown in Figure 3, the present embodiment increases some perforated rebars 6 on the basis of embodiment 5, the longitudinal tilting section through stiffener 3 of perforated rebar 6, concrete operations are: in the tilting section perforate of corrugated web 1 and wear longitudinal perforated rebar 6, resistivity with enhancing with the direction moment of flexure that longitudinally meets at right angles, longitudinally the quantity of perforated rebar 6 and arrangement can be adjusted according to concrete requirement.
Embodiment 7:
The present embodiment improves on the basis of embodiment 6, makes perforated rebar 6 vertical with WELDING STUDS 5, to guarantee to strengthen the horizontal and vertical resistance of frange plate 2.
Embodiment 8:
As shown in Figure 4, the present embodiment is provided with breach on the basis of embodiment 7 on stiffener 3, this breach is that the stiffener of original whole piece 3 is interrupted to formation, then by transiting arc plate 7, two sections of stiffeners 3 that disconnect is coupled together, and crosses arc plate 7 place radius of a circles and is equal to or greater than 150mm.Thus, for the larger situation of beam span, can only to the tired rapid wear section of Wavelike steel webplate beam, carry out the structure improvement of fatigue strength raising, on the frange plate 2 of the tired vulnerable zone of correspondence, stiffener 3 is set, do not need the place of strengthening by transiting arc plate 7, to carry out transition, make structural design scheme can meet economy requirement simultaneously.
Embodiment 9:
Except above embodiment, by expanding longitudinal flat segments of corrugated web 1 and stiffener 3 and tilting section at the arc radius of waveform rotation angle position, also contribute to improve fatigue life, the stress that is reduced in this position is concentrated, and arc radius can the extended maximum value to limiting by waveform tilting section.
As shown in Figure 5, by Data Comparison, can see, after employing standard welding method is improved with structure, the waveform tilting section angle of cut is the node of the 60 degree difference on fatigue strength, by with the tired codes and standards curve comparison of AASHTO LRFD, can find, the fatigue data after the utility model structure improves has obviously improved fatigue resistance more than rising to below B level from B level.
The utility model is illustrated by above-described embodiment, but should be understood that, above-described embodiment is the object for giving an example and illustrating just, but not is intended to the utility model to be limited in described scope of embodiments.In addition; it will be understood by those skilled in the art that; the utility model is not limited to above-described embodiment, according to instruction of the present utility model, can also make more kinds of variants and modifications, and these variants and modifications all drop in the utility model scope required for protection.
Claims (8)
1. a Wavelike steel webplate girder construction that improves fatigue resistance, comprise two blocks of frange plates (2) and be arranged on the corrugated web (1) between two blocks of frange plates (2), corrugated web (1) comprises longitudinal flat segments and tilting section, it is characterized in that: the outside of described at least one block of frange plate (2) is provided with stiffener (3), described stiffener (3) is projected as waveform on frange plate (2).
2. a kind of Wavelike steel webplate girder construction that improves fatigue resistance according to claim 1, is characterized in that: described stiffener (3) is perpendicular to frange plate (2).
3. a kind of Wavelike steel webplate girder construction that improves fatigue resistance according to claim 1, it is characterized in that: projection and corrugated web (1) projection on frange plate (2) of described stiffener (3) on frange plate (2) is positioned in same coordinate axes, and differs 1/2 wavelength.
4. a kind of Wavelike steel webplate girder construction that improves fatigue resistance according to claim 3, is characterized in that: also comprise some WELDING STUDS (5), described WELDING STUDS (5) laterally runs through stiffener (3).
5. a kind of Wavelike steel webplate girder construction that improves fatigue resistance according to claim 4, is characterized in that: described WELDING STUDS (5) is through the flat segments of stiffener (3), and WELDING STUDS (5) is vertical with the flat segments of stiffener (3).
6. according to a kind of Wavelike steel webplate girder construction that improves fatigue resistance described in claim 4 or 5, it is characterized in that: also comprise some perforated rebars (6), described perforated rebar (6) is longitudinally through the tilting section of stiffener (3), and perforated rebar (6) is vertical with WELDING STUDS (5).
7. a kind of Wavelike steel webplate girder construction that improves fatigue resistance according to claim 3, it is characterized in that: tilting section and the handing-over of the corner between the flat segments position of described Wavelike steel webplate (1) and corresponding stiffener (3) adopt arc transition, the radius of curvature of this circular arc is equal to or greater than half of parallel distance between two adjacent flat segments.
8. a kind of Wavelike steel webplate girder construction that improves fatigue resistance according to claim 1, it is characterized in that: described stiffener (3) is provided with breach, this indentation, there is connected with transiting arc plate (7), described in cross arc plate (7) place radius of a circle and be equal to or greater than 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320514621.2U CN203412189U (en) | 2013-08-22 | 2013-08-22 | Corrugated steel web-plate beam structure for improving fatigue resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320514621.2U CN203412189U (en) | 2013-08-22 | 2013-08-22 | Corrugated steel web-plate beam structure for improving fatigue resistance |
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| CN203412189U true CN203412189U (en) | 2014-01-29 |
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| CN201320514621.2U Withdrawn - After Issue CN203412189U (en) | 2013-08-22 | 2013-08-22 | Corrugated steel web-plate beam structure for improving fatigue resistance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388376A (en) * | 2013-08-22 | 2013-11-13 | 四川大学 | Corrugated steel web beam structure for improving fatigue resistance strength |
| CN105256727A (en) * | 2015-11-20 | 2016-01-20 | 苏交科集团股份有限公司 | Transverse reinforcing device for corrugated steel web combination beam |
-
2013
- 2013-08-22 CN CN201320514621.2U patent/CN203412189U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388376A (en) * | 2013-08-22 | 2013-11-13 | 四川大学 | Corrugated steel web beam structure for improving fatigue resistance strength |
| CN103388376B (en) * | 2013-08-22 | 2015-11-11 | 四川大学 | A kind of Wavelike steel webplate girder construction improving fatigue resistance |
| CN105256727A (en) * | 2015-11-20 | 2016-01-20 | 苏交科集团股份有限公司 | Transverse reinforcing device for corrugated steel web combination beam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20151111 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |