CN105220608A - A kind of prestressed concrete triangle case beam - Google Patents
A kind of prestressed concrete triangle case beam Download PDFInfo
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- CN105220608A CN105220608A CN201510173376.7A CN201510173376A CN105220608A CN 105220608 A CN105220608 A CN 105220608A CN 201510173376 A CN201510173376 A CN 201510173376A CN 105220608 A CN105220608 A CN 105220608A
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- skew web
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Abstract
The invention provides a kind of prestressed concrete triangle case beam being conducive to Longspan Bridge and building.Do not arrange in bridge inside or the least possible partition wall is set, the safety of section also can be made to improve, and can section configuration be maintained, relying on triangular section shape to reduce the demand of deadweight and steel, utilizing steel wire to import compressive force.Prestressed concrete triangle case beam, comprises bridge and end reinforcing rib.Bridge of telling comprises lower flange of girder edge, at the skew web plate that the center of described lower flange of girder edge connects to upside with V-arrangement, and connects the beam top flange on described two skew web plate tops; Described reinforcing rib is positioned at the inner surface of the described skew web plate on bridge pad.Described lower flange of girder edge, beam top flange and end reinforcing rib are made up of concrete.Form the leg-of-mutton interior angle of described skew web plate and beam top flange respectively in the scope of 55 ~ 65 degree.
Description
Art
The present invention relates to a kind of prestressed concrete triangle case beam { Prestressedconcretetriangleboxgirder}.
current background technology
The PSC case beam in past or its section configuration of steel box-girder are box-shaped or trapezoidal box-shaped.Section structure as above, in order to maintain its section configuration, need arrange partition wall (support of diaphragm or square crossing) in a distance in bridge inside.This is in order to section configuration is as box-shaped or trapezium structure, when tackling distortion and the situation such as bending, bridge can be prevented to be distorted.Under these circumstances, PSC box-girder because of its section configuration be not the suitableeest section configuration, required steel are very many, therefore economical not, and the deadweight of bridge also has increase, during erection construction, also economical not.Therefore, need the PSC case beam that exploitation one is new, its technical requirements is as described below.Namely make as much as possible PSC case beam or PSC combined box beam most suitable, increase torsional resistance and buckling resistance, reduce component demand, increase stability and business efficiency.The present invention is by United States Patent (USP) the 4th, and 912, No. 794 as technical background.Bridge provided by the invention has following technical requirements.Namely the section of bridge forms triangle, and web is made up of steel plate, connection bottom, the lower end cord fabric thread of steel plate, and upper end connects concrete top cord fabric thread.Another technical background of the present invention is United States Patent (USP) the 4th, 993, No. 094.The invention provides connection bottom, a kind of lower end suspension rod, the cable-stayed type Longspan Bridge of connection top, upper end suspension rod.Another technical background of the present invention is United States Patent (USP) the 5th, 052, No. 309.The invention provides a kind of bracing members lower end joint steel pipe forming web, its upper end connects the magnetic suspension transport rail carrier of the flank of upper component.But, when described technical background is used in Longspan Bridge, there is no the means of resisting the tension resistance produced between hogging moment area, and very difficult opposing becomes large flexural stress gradually from bearing to inner side, moreover, utilize on the downside of web and section steel wire import compressive force time comparatively difficult.
Summary of the invention
In order to solve the problem, the invention provides a kind of prestressed concrete triangle case beam.The scheme that the present invention solves the problems of the technologies described above is as follows.Not arrange or the least possible partition wall that arranges also can make the safety of section improve in bridge inside, and can section configuration be maintained, rely on triangular section shape to reduce the demand of deadweight and steel, utilize steel wire importing compressive force.
A kind of prestressed concrete triangle case beam, comprise bridge 10 and end reinforcing rib 104, it is characterized in that, bridge of telling comprises lower flange of girder edge 101, at the skew web plate 102 that the center of described lower flange of girder edge 101 connects to upside with V-arrangement, 102, and the beam top flange 103 connecting described two skew web plate 102,102 top; Described reinforcing rib 104 is positioned at the inner surface of the described skew web plate 102,102 on bridge 10 bearing; Described lower flange of girder edge 101, skew web plate 102,102, beam top flange 103 and end reinforcing rib 104 are made up of concrete; Form leg-of-mutton interior angle P1, the P2 of described skew web plate 102,102 and beam top flange 103 respectively in the scope of 55 ~ 65 degree.
Further, the intersection point O1 on described end reinforcing rib 104 inner surface line 104a is positioned at the center of described lower flange of girder edge 101 upper surface; Intersection point O2 on the inner surface line 104b of described skew web plate 102,102 is arranged on the upper surface of the bridge pad device 5 that described bridge 10 bottom is arranged while being positioned at described lower flange of girder edge 101 soffit center.
Further, inside described bridge 10 between bearing hogging moment area on beam top flange 103 comprise again steel plate 105.
Further, inside described bridge 10 between bearing hogging moment area on beam top flange 103 comprise again PS steel wire W3.
Further, described prestressed concrete triangle case beam is included in and inside described bridge 10, bearing departs from certain distance to the inside and be positioned at described skew web plate 102, internal reinforcement rib 106 on 102 inner surfaces, be positioned at two ends and the described skew web plate 102 of described lower flange of girder edge 101, the inner tensile PS steel wire anchoring district 107 at 102 bottom, two ends, outside described bridge 10 block end reinforcing rib 104 upper outside on the outside stretching PS steel wire anchoring district 109 that settles, the PS steel wire internal reinforcement rib col 110 that the bottom of described bridge 10 internal reinforcement rib 106 is arranged, inside described bridge 10 block end reinforcing rib 108 top on bearing col 112 inside the PS steel wire that arranges, at the skew web plate 102 of described each bridge 10, 102 and lower flange of girder edge 101 inside on the inner tensile PS steel wire W1 that arranges, and the outside stretching PS steel wire W2 arranged on the inner space of described bridge 10, described inner tensile PS steel wire W1 completes at bridge 10 and makes after-drawing between the two ends, described outside stretching PS steel wire W2, after bridge 10 is erected on abutment 1 or bridge pier 2, stretches between two outboard end of outside span bridge in the lump.
In addition, a kind of prestressed concrete triangle case beam, comprise bridge 10 and end reinforcing rib 104, it is characterized in that, bridge of telling comprises lower flange of girder edge 101, at the center of described lower flange of girder edge 101 with the skew web plate 102,102 that V-arrangement connects to upside, and connect the beam top flange 103 on described two skew web plate 102,102 top; Described reinforcing rib 104 is positioned at the inner surface of the described skew web plate 102,102 on bridge 10 bearing; Described lower flange of girder edge 101, beam top flange 103 and end reinforcing rib 104 are made up of concrete, and described skew web plate 102,102 is made up of corrugated steel or steel structure truss; Form leg-of-mutton interior angle P1, the P2 of described skew web plate 102,102 and beam top flange 103 respectively in the scope of 55 ~ 65 degree; On the reinforcing rib 104 inner surface line of described end, the intersection point O1 of 104a is positioned at the center of described lower flange of girder edge 101 upper surface; Intersection point O2 on the inner surface line 104b of described skew web plate 102,102 is arranged on the upper surface of the bridge pad device 5 that described bridge 10 bottom is arranged while being positioned at described lower flange of girder edge 101 soffit center.
Further, described lower flange of girder edge 101 comprises again the U-shaped steel plate 115 around its soffit and side.
Based on the present invention, the section safety of prestressed concrete triangle case beam is very high, and not be used in bridge inside and arrange partition wall diaphragm or arrange less as much as possible, also can maintain section configuration.Further, the shape of bridge is triangle, can reduce the demand of component, therefore very economical.Further, weight is less than PSC case beam shape in the past, therefore becomes very easy at making, setting up procedure.Further, utilize PS steel wire to import compressive force, thus compare to PSC case beam in the past, large span becomes more possible.
the description of the drawings
Fig. 1 is the schematic diagram based on prestressed concrete triangle case beam of the present invention.
Fig. 2 a is Fig. 1 " X " partial enlargement figure.
Fig. 2 b is Fig. 1 " Y " partial enlargement figure.
Fig. 3 is the oblique view of the outside span PSC triangle case beam in Fig. 1.
Fig. 4 is the oblique view of the inner side span PSC triangle case beam in Fig. 1.
Fig. 5 a to Fig. 5 e is the A-A line of Fig. 1 respectively, B-B line, C-C line, D-D line, the sectional view of E-E line.
Fig. 6 is the sectional view of the prestressed concrete triangle case beam based on case study on implementation another kind of in the present invention.
description of reference numerals
101: lower flange of girder edge
102: skew web plate
104,108: end reinforcing rib
105: steel plate
106: internal reinforcement rib
110: internal reinforcement rib col
Bearing col inside 112:PS steel wire
W1: inner tensile PS steel wire
W2: outside stretching PS steel wire
concrete embodiment
Next, with reference to accompanying drawing, the present invention will be described in detail, but shown case study on implementation is just in order to understand the present invention more accurately, and therefore the present invention is not limited to this.
Triangular section in section configuration can form highly stable section in external form.If not being triangular shaped when the beam of bridge is closed section, when being subject to making its distortion or bending external force, section will produce twisted phenomena.Therefore, the square crossing that need arrange at certain intervals for maintaining section configuration supports, and maybe must arrange concrete, steel partition wall (diaphragm).When the section configuration of the beam proposed in the present invention is triangle, distortion or the External Force Acting such as bending also can be stoped to make the phenomenon of section distortion without the need to partition wall (diaphragm).
In the present invention, when concrete or steel form closed section, make the shape of beam be the structure of equilateral triangle or similar equilateral triangle, increase torsional resistance.Be positioned at abutment and the bridge pier part of bridge pad device, set up concrete strengthening rib at the concrete skew web plate medial surface of the section of triangular beam.Inner surface line and the skew web plate inner surface line setting up the concrete strengthening rib in skew web plate of concrete beam top top cover, common formation is triangular shaped.
Now, the imagination summit, lower end of triangle inner surface line is positioned on the upper surface of lower flange of girder edge, on the imaginary summit of described lower flange of girder edge, will be equivalent to the soffit of the lower flange of girder edge of vertical lower bearing as end reaction point, installs bridge pad device.Namely, described end reaction point is the imaginary triangle inside lower end summit not having reinforcing rib, this corresponding triangle inner surface line lower end vertex be only made up of skew web plate, makes concrete strengthening rib and skew web plate not bend, is formed and make the triangular shaped of Bridge Sections dimensionally stable.
Therefore, the bridge in the present invention does not need on concrete skew web plate, arrange independent concrete partition diaphragm, or makes the less thick of concrete partition as much as possible.And, if the structure of described formation is carried out other explanation, there is no the words that the bridge central section of concrete strengthening rib is benchmark, concrete skew web plate inner surface line and the concrete top top cover of triangle bridge meet, form equilateral triangle or the triangle bottom end rail bottom flange close to equilateral triangle, bearing is sitting on the summit of described bottom end rail bottom flange soffit, and becomes the end reaction point on the bearing of medial and lateral simultaneously, and on bearing, arrange bridge pad device.
PSC triangle case beam of the present invention has following structure.As on the bearing of medial and lateral, on the position being placed in inner concrete deflection component and concrete col or concrete camber beam, the concrete strengthening rib arranged in triangle case beam inside forms concrete top top cover and the equilateral triangle of triangle bridge, thus plays a role as the concrete partition diaphragm maintaining triangular section shape.
Transverse strength based on PSC triangle case Liangqi Bridge Sections of the present invention is very large, therefore, more stable than any one section configuration, and is not provided with concrete partition diaphragm in bridge inside or is minimized, thus forms most economical section.Further, section configuration as above is equally applicable to the PSC combined box beam shape that bridge skew web plate is made up of corrugated steel or steel structure truss.
< case study on implementation >
As shown in Fig. 1, Fig. 3 and Fig. 4, PSC triangle case beam less than 10 is all called, and ' bridge 10 ' is constructed by inner side span PSC triangle case beam 10a and outside span PSC triangle case beam 10b.
At this, inner side span PSC triangle case beam 10a is arranged on adjacent bridge pier
between, outside span PSC triangle case beam 10b is arranged between abutment 1 and bridge pier 2.
As shown in Fig. 3 to Fig. 5 e, bridge 10 comprises lower flange of girder edge 101, at the skew web plate 102,102 that lower flange of girder edge 101 center extends to upside with V-arrangement, and connects the beam top flange 103 on skew web plate 102,102 top, both sides.
Now, the position bag of bridge 10 bearing is positioned at and draws together skew web plate 102, the end reinforcing rib 104 on 102 inner surfaces.
And lower flange of girder edge 101, skew web plate 102,102, beam top flange 103 and end reinforcing rib 104 are made up of concrete.
Form the triangle interior angle P1 of skew web plate 102,102 and beam top flange 103, P2 is respectively within 55 ~ 65 degree of scopes.Therefore, shown in each section configuration of Fig. 5 a to Fig. 5 e, bridge 10 of the present invention has triangular section at length direction.Therefore, bridge 10 relies on triangular section, increases torsional resistance, does not have partition wall diaphragm also can prevent because of distortion or bending and make the phenomenon of cross section deformation.
Now, the intersection point O1 of the inner surface line 104a of end reinforcing rib 104 is positioned at the center of the upper surface of lower flange of girder edge 101.Further, skew web plate 102, the intersection point O2 of 102 inner surface line 104b is positioned at the center of described lower flange of girder edge 101 soffit, and is positioned on the upper surface of the bridge pad device 5 being arranged on described bridge 10 bottom simultaneously.
Therefore, end reaction point on bridge pad device 5 does not have the lower end vertex on the imaginary triangle inner surface line 104b of reinforcing rib, this with only by skew web plate 102, the lower end vertex of the 102 triangle inner surface line 104b formed is corresponding, thus at concrete strengthening rib and skew web plate 102, do not bend on 102, form more stable stable triangular shaped of bridge 10 beam section configuration.
As depicted in fig. 5e, inside described bridge 10 bearing hogging moment area between on beam top flange 103 comprise again steel plate 105.That is, the beam top flange 103 between hogging moment area is by the Structure composing synthesizing steel plate 105 on concrete.Inside bridge 10 bearing hogging moment area between on synthesize steel plate 105, thus increase tension resistance.
Further, inside bridge 10 between bearing hogging moment area on beam top flange 103 comprise again PS steel wire W3.Based on the implementation case, PS steel wire W3 through beam top flange 103, draw house by anchoring on the downside of the beam top flange 103 of its one end of anchor device and inner side span PSC triangle case beam 10a, the downside anchoring of the beam top flange 103 of the other end and outside span PSC triangle case beam 10b also stretches.
On the one hand, from the bearing of bridge 10, depart from certain distance to the inside, at skew web plate 102, the inner surface of 102 is installed internal reinforcement rib 106.Further, in the bottom, two ends of the two ends of lower flange of girder edge 101 and described skew web plate 102,102, inner tensile PS steel wire anchoring district 107 is provided with.Further, the upper outside of the end reinforcing rib 104 of bearing outside bridge 10, is mounted with outside stretching PS steel wire anchoring district 109.Further, in the bottom of bridge internal reinforcement rib 10, PS steel wire internal reinforcement rib col 110 is set.The top of the end reinforcing rib 108 of bearing inside described bridge 10, arranges bearing col 112 inside PS steel wire.
Be provided with inner tensile PS steel wire W1 at the skew web plate 102,102 of each bridge 10 and the inside of lower flange of girder edge 101, be provided with outside stretching PS steel wire W2 in the inner space of bridge 10.A part of inner tensile PS steel wire W1 is arranged on the inside of lower flange of girder edge 101, and another part is from skew web plate 102, and 102 start, in each bridge 10, to be arranged on gradually on lower flange of girder edge 101.At this moment, inner tensile PS steel wire W1, after each bridge 10 completes, carries out stretching and being anchored in inner tensile PS steel wire anchoring district 107 between the two ends of each bridge 10.Further, outside stretching PS steel wire W2, after being set up by bridge 10 on abutment 1 or bridge pier 2, stretches in the lump between two outboard end of outside span bridge 10b, and is anchored in outside stretching PS steel wire anchoring district 109.
Further, as shown in Figure 6, inclination web 102,102 is made up of corrugated steel or steel structure truss, and lower flange of girder edge 101 comprises again the U-shaped steel plate 115 around its soffit and side.
As mentioned above, it is triangular shaped that its section configuration of bridge 10 of the present invention is best suited for, rely on inner tensile PS steel wire W1, resist but the flexural stress of span beam sections, by outside stretching PS steel wire W2, inner side span PSC triangle case beam 10a is connected in the lump with outside span PSC triangle case beam 10b simultaneously.And by the PS steel wire W3 that the beam top flange 103 inside bridge 10 between bearing hogging moment area is arranged, increase the stability of structure, practicality and economy, and be applicable to long-span beams, profile is also very attractive in appearance.
Further, between the hogging moment area of concrete top holder top inside continuous girder bridge of bridge 10, synthesize with steel plate 105, thus tension resistance can be increased.
Further, skew web plate 102,102 are made up of corrugated steel or steel structure truss, form PSC triangle combined box beam 10.In the case, concrete top is substituted by Horizontal steelwork bracing, thus the practicality of lifting construction.
Further, positive bending moment sections and hogging moment sections are separately made after-frame and are set on abutment 1, bridge pier 2 and assemble by PSC triangle case beam 10 of the present invention.In the case, bridge 10 can be made to have larger span.
And, lower flange of girder edge 101 by U-shaped steel plate 115 around, not only attractive in appearance but also the concrete strength of lower flange of girder edge 101 can be increased, because the concrete of lower flange of girder edge 101 can not be exposed on the external, the durability of lower flange of girder edge 101 also increases thereupon, and this can reduce the operating expenses of large span, bridge that deck-molding is low.Further, U-shaped steel plate 115 also plays the mould action of lower flange of girder edge 101, and therefore, in making, manufacturer does not need to use mould just can construct to lower flange of girder edge 101 like a cork in addition.When Longspan Bridge 10, if U-shaped steel plate 115 and skew web plate 102,102 connect by forming connecting elements in a distance, then can use following construction method, be about to after on lower flange of girder edge 101, concreting and the bridge 10 be only made up of steel do not set up on abutment 1 or bridge pier 2, concreting on lower flange of girder edge 101 is also stretched by PS steel wire.In secondary situation, because bridge 10 weight reduction, therefore set up arrangement and become very easy, even Longspan Bridge also can easily set up.Therefore, the concrete after-frame of casting beams bottom flange 101 is set on abutment 1 or bridge pier 2 in advance, after also or first by bridge 10 setting up on abutment 1 or bridge pier 2, then the concrete of casting beams bottom flange 101.These two kinds of methods can according to different field conditions, choice for use neatly.
Above-mentioned explanation merely illustrates technological thought of the present invention, as long as on this field, there is the people of certain rudimentary knowledge, under the prerequisite not departing from technological thought of the present invention, all can refer to case study on implementation and carry out various change and correction, then create the invention made new advances.The present invention is not restricted to such distortion and revises invention, is only limited by the claim of adding below.
In a word; it is exactly more than each technical essential of the present invention; although be below described the preferred embodiments of the present invention by reference to the accompanying drawings; but the invention is not restricted to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic instead of determinate; those of ordinary skill in the art is under enlightenment of the present invention; under the prerequisite without prejudice to present inventive concept and claim; multiple similar enlightenment and accommodation can be drawn; and make corresponding simple change and amendment, be similar to such conversion and all fall within protection scope of the present invention.
Claims (7)
1. a prestressed concrete triangle case beam, comprise bridge (10) and end reinforcing rib (104), it is characterized in that, bridge of telling comprises lower flange of girder edge (101), at the skew web plate (102 that the center of described lower flange of girder edge (101) connects to upside with V-arrangement,, and connect the beam top flange (103) on described two skew web plate (102,102) top 102); Described reinforcing rib (104) is positioned at the inner surface of the described skew web plate (102,102) on bridge (10) bearing; Described lower flange of girder edge (101), skew web plate (102,102), beam top flange (103) and end reinforcing rib (104) are made up of concrete; Form the leg-of-mutton interior angle (P1, P2) of described skew web plate (102,102) and beam top flange (103) respectively in the scope of 55 ~ 65 degree.
2. prestressed concrete triangle case beam according to claim 1, it is characterized in that, the intersection point (O1) on described end reinforcing rib (104) inner surface line (104a) is positioned at the center of described lower flange of girder edge (101) upper surface; Intersection point (O2) on the inner surface line (104b) of described skew web plate (102,102) is arranged on the upper surface of the bridge pad device (5) that described bridge (10) bottom is arranged while being positioned at described lower flange of girder edge (101) soffit center.
3. prestressed concrete triangle case beam according to claim 1, is characterized in that, the beam top flange (103) between bearing hogging moment area, described bridge (10) inner side comprises again steel plate (105).
4. prestressed concrete triangle case beam according to claim 1, is characterized in that, the beam top flange (103) between bearing hogging moment area, described bridge (10) inner side comprises again PS steel wire (W3).
5. prestressed concrete triangle case beam according to claim 1, it is characterized in that, described prestressed concrete triangle case beam is included on the bearing of described bridge (10) inner side and departs from certain distance to the inside and be positioned at described skew web plate (102, 102) the internal reinforcement rib (106) on inner surface, be positioned at two ends and the described skew web plate (102 of described lower flange of girder edge (101), 102) the inner tensile PS steel wire anchoring district (107) of bottom, two ends, outside stretching PS steel wire anchoring district (109) that the upper outside of described bridge (10) outside block end reinforcing rib (104) is settled, PS steel wire internal reinforcement rib col (110) that the bottom of described bridge (10) internal reinforcement rib (106) is arranged, bearing col (112) inside the PS steel wire that the top of described bridge (10) inner side block end reinforcing rib (108) is arranged, at the skew web plate (102 of described each bridge (10), 102) and the inner tensile PS steel wire (W1) that the inside of lower flange of girder edge (101) is arranged, and outside stretching PS steel wire (W2) arranged on the inner space of described bridge (10), described inner tensile PS steel wire (W1) completes at bridge (10) and makes after-drawing between the two ends, described outside stretching PS steel wire (W2), after bridge (10) is erected on abutment (1) or bridge pier (2), stretches between two outboard end of outside span bridge in the lump.
6. a prestressed concrete triangle case beam, comprise bridge (10) and end reinforcing rib (104), it is characterized in that, bridge of telling comprises lower flange of girder edge (101), at the skew web plate (102 that the center of described lower flange of girder edge (101) connects to upside with V-arrangement,, and connect the beam top flange (103) on described two skew web plate (102,102) top 102); Described reinforcing rib (104) is positioned at the inner surface of the described skew web plate (102,102) on bridge (10) bearing; Described lower flange of girder edge (101), beam top flange (103) and end reinforcing rib (104) are made up of concrete, and described skew web plate (102,102) is made up of corrugated steel or steel structure truss; Form the leg-of-mutton interior angle (P1, P2) of described skew web plate (102,102) and beam top flange (103) respectively in the scope of 55 ~ 65 degree; On reinforcing rib (104) the inner surface line of described end, the intersection point (O1) of (104a) is positioned at the center of described lower flange of girder edge (101) upper surface; Intersection point (O2) on the inner surface line (104b) of described skew web plate (102,102) is arranged on the upper surface of the bridge pad device (5) that described bridge (10) bottom is arranged while being positioned at described lower flange of girder edge (101) soffit center.
7. prestressed concrete triangle case beam according to claim 6, is characterized in that, described lower flange of girder edge (101) comprises again the U-shaped steel plate (115) around its soffit and side.
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| CN201510173376.7A CN105220608A (en) | 2015-04-14 | 2015-04-14 | A kind of prestressed concrete triangle case beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106192726A (en) * | 2016-08-30 | 2016-12-07 | 西安公路研究院 | A kind of V-arrangement web beam structure and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106192726A (en) * | 2016-08-30 | 2016-12-07 | 西安公路研究院 | A kind of V-arrangement web beam structure and construction method thereof |
| CN106192726B (en) * | 2016-08-30 | 2018-11-13 | 西安公路研究院 | A kind of V-arrangement web beam structure and its construction method |
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Application publication date: 20160106 |