CN102561168A - Bamboo plywood beam structure - Google Patents
Bamboo plywood beam structure Download PDFInfo
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- CN102561168A CN102561168A CN201110444118XA CN201110444118A CN102561168A CN 102561168 A CN102561168 A CN 102561168A CN 201110444118X A CN201110444118X A CN 201110444118XA CN 201110444118 A CN201110444118 A CN 201110444118A CN 102561168 A CN102561168 A CN 102561168A
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Abstract
The invention discloses a bamboo plywood beam structure, which comprises an upper flange board, a web board and a lower flange board which are made of bamboo plywood and sequentially connected, wherein the upper flange board is formed by connecting an upper flange outer board and an upper flange inner board positioned on the lower side of the upper flange outer board; the lower flange board is formed by connecting a lower flange outer board and a lower flange inner board positioned on the upper side of the lower flange outer board; the web board comprises a plurality of superposed single web boards; and tenons arranged at intervals are arranged on the surface of each single web board opposite to the inner boards, the tenons on two adjacent single web boards are staggered, the upper flange inner board and the lower flange inner board are provided with mortises matched with the size and the distribution position of the tenons, and the tenons are embedded into the mortises. The bamboo plywood beam structure has large anti-shearing bearing capacity, and is simple in structure and easy to manufacture; the number of the composing unit boards can be adjusted according to the magnitude of the shearing force borne by a beam; and the integrity of the transverse H-shaped beam can be improved.
Description
Technical field
The invention belongs to the bridge construction technical field, relate to a kind of bamboo offset plate girder construction that is applicable in I-shaped, the tee girder.
Background technology
At present had this connected mode of joggle in the wooden construction, but joggle is used for just member is simply connected, is not used to bear shearing.Shear connector joggle of the present invention is mainly born the effect of shearing through the crimp between two row's tenons and tongue-and-groove; And the loading characteristic that is directed to beam processes certain angle of inclination with tenon, is used for bearing beam and receives the power that starts between web and frange plate when curved.
Existing bamboo offset plate is mainly as the lower construction formwork of surcharge on the civil construction market, as yet not as main structural material applications in load-carrying members.Modern bamboo wood of Hunan University and Study on Composite Structure institute have carried out comparatively systematic research to the gummed bamboo structure, have proposed modern bamboo structure technology, and have used this technical design and built the bamboo structure pedestrian overcrossing, have proved that bamboo plywood can be applicable to bridge construction.But find after analyzing the present Research that has bamboo bridge both at home and abroad; The bamboo offset plate just appears in the beam as a certain supporting member now; The bamboo bridge of Leiyang, Hunan connects with bolt between bamboo clappers by forming as the bamboo offset plate and the concrete slab of main supporting member and diaphragm.Though thereby this mode of joggle exists, be not applied in the bridge, and do not study both at home and abroad, thereby this connected mode of shear key joggle was not used to the beam of all processing by the bamboo offset plate.
Existing I-shaped bamboo offset plate beam shearing connected mode is the quadrature connected mode between beam body web and the frange plate, to also there not being reliable method of attachment at present.Can for reference connected mode have two kinds, a kind of is bonding, and another kind is a mechanical connection.
If stick with glue the agent bonding, then because the shear strength of glue is not enough, bonding adhesive was destroyed before the i-shaped roof beam material damage earlier, so just cause the globality of i-shaped roof beam to descend, the bearing capacity of beam reduces, and beam can not be brought into play the ultimate bearing capacity of material.If use mechanical connection, for example angle steel (does not reach the ultimate bearing capacity of material) when the external load that Dang Liangshang applies reaches certain value, and cripling can take place the web of beam destroys, and causes the bearing capacity of beam to reduce, and fails to bring into play the ultimate bearing capacity of material yet.Combine with mechanical connection if will bond, then because the deformation performance of both connected modes is variant, can cause the bonding way of adhesive layer to be destroyed earlier, then mechanical connection just begins to bring into play its load-carrying properties, and both can not coordinate stressed jointly.
Summary of the invention
Technical problem:The invention provides a kind of bamboo offset plate girder construction of bearing longitudinal shearing stress, realizing the i-shaped roof beam globality, solved the connectivity problem of beam median ventral plate and frange plate, web and frange plate are linked together reliably.
Technical scheme:Bamboo offset plate girder construction of the present invention; Comprise the top flange plate, web and the bottom wing listrium that connect successively that the bamboo offset plate is processed; Top flange plate is formed by connecting top flange outside plate and the top flange inner panel that is positioned at top flange outside plate downside, and the bottom wing listrium is formed by connecting bottom flange outside plate and the bottom flange inner panel that is positioned at bottom flange outside plate upside, and web comprises superimposed a plurality of web veneers; The web veneer be provided with spaced tenon with the inner panel facing surfaces; Tenon on the two adjacent web veneers is staggered, and is provided with on top flange inner panel and the bottom flange inner panel and the size of said tenon, the tongue-and-groove that distributing position is complementary, and tenon embeds in the said tongue-and-groove.
Among the present invention, top flange outside plate, top flange inner panel, bottom flange inner panel, bottom flange outside plate all adopt the bamboo wood laminate, and said web veneer adopts bamboo plywood.
Among the present invention, tenon is with respect to the plate face tilt of web veneer, and said tongue-and-groove also favours inner panel plate face accordingly, and the angle of inclination of tongue-and-groove and the angle of inclination of tenon are complementary.
Among the present invention, connect with structure glue between the two adjacent web veneers, strengthen with bolt simultaneously.
Among the present invention, between top flange outside plate and the top flange inner panel, between bottom flange inner panel and the bottom flange outside plate, all connect, strengthen with bolt simultaneously with structure glue.
Beneficial effect:The present invention and prior art compare, and have the following advantages:
Shear connector joggle of the present invention is mainly born the effect of shearing through the crimp between two row's tenons and tongue-and-groove.The stress morphology that beam is general is bending deformation, shows as that the bottom flange is drawn, the top flange pressurized, and on the cross section of structure, showing as with the neutral axis is zero point, is drawn below the above pressurized of neutral axis, and stressed triangularity shape distributes.Thereby go up and to exist the active force that is parallel to girder span footpath direction between bottom flange and web, so go up the relative changing of the relative positions phenomenon that can take place on the cross section between bottom flange and the web, the i.e. effect of shearing force.Existing common practices is to stick with glue the agent bonding, utilizes the effect of glue bond power opposing shearing force, and this way still is useful for stressed little wooden construction, but for stressed bigger girder construction, just seems not enough.Had this connected mode of joggle in the wooden construction, but joggle is used for just member is simply connected, be not used to bear shearing, and simple joggle can not be born bigger shearing force.Thereby to this present situation; Shear connector of the present invention can well address this problem, and mainly is the effect of bearing shearing through the crimp between two row tenons and tongue-and-grooves, and in the design with staggering between the tenon; Avoid tenon to destroy because concentrate stressed; Only in a plate, hollow out the making tongue-and-groove in the wooden construction in addition, and be directed to the characteristics of bamboo offset plate self, the existence of last bottom flange inner panel tongue-and-groove makes the globality of frange plate descend; For preventing that tongue-and-groove from can occur the concentrated frange plate that damages by pressure of stress on every side and being stained with another piece plate in the frange plate outside with structure glue again, be used for increasing the globality of frange plate.The last loading characteristic that is directed to beam is again processed certain angle of inclination with tenon, is used for bearing beam and receives the power that starts between web and frange plate when curved.It should be noted that the shearing force that single tongue-and-groove is born is a definite value with starting power, connected mode of the present invention mainly is to calculate the number of needs tongue-and-groove according to stressed size, confirms the number of web then, and then is processed into beam.
The connected mode of joggle according to the invention is to make to the loading characteristic of beam, at first when beam receives to bend; Can produce the slippage shearing force between web and the frange plate, this part power is born by all tenons, when secondly receiving to bend owing to beam; Also can produce the power of starting between web and the frange plate, this part power is born by the tenon that tilts, and the 3rd owing to have tongue-and-groove on the inner panel of the upper and lower edge of a wing; The globality of plate descends, thereby has added an outside plate, guarantees the globality of plate.
In addition, this connected mode of the present invention is made simple than mechanical connection, and operation is clear and definite, can in factory, process fully, and machining accuracy is high, increases the globality of i-shaped roof beam simultaneously, thereby improves the bearing capacity of beam.
Description of drawings
Fig. 1 is the overall structure figure of bamboo offset plate girder construction of the present invention.
Fig. 2 is the decomposition chart of bamboo offset plate girder construction of the present invention.
Fig. 3 is the tenon figure that certain inclination angle is arranged in the bamboo offset plate girder construction of the present invention, and α is the slanted angle of tenon and web veneer plate face among the figure.
Among the figure: 1. top flange outside plate, 2. top flange inner panel, 3. web veneer, 4. bottom flange inner panel, 5. bottom flange outside plate, 6. tongue-and-groove, 7. tenon.
The specific embodiment
Bamboo offset plate girder construction of the present invention; Comprise top flange plate, bottom wing listrium and web that the bamboo offset plate is processed, top flange plate is formed by connecting top flange outside plate 1 and the top flange inner panel 2 that is positioned at top flange outside plate 1 downside, and the bottom wing listrium is formed by connecting bottom flange outside plate 5 and the bottom flange inner panel 4 that is positioned at bottom flange outside plate 5 upsides; Web comprises superimposed a plurality of web veneers 3; The quantity of web veneer 3 can be adjusted according to the size of shearing that beam bears, and the tenon 7 that the upper and lower surfaces of web veneer 3 is provided with on spaced tenon 7, the two adjacent web veneers 3 is staggered; Be provided with and the size of said tenon 7, the tongue-and-groove 6 that distributing position is complementary on top flange inner panel 2 and the bottom flange inner panel 4; Tenon 7 embeds in the said tongue-and-groove 6, tenon 7 and tongue-and-groove 6 fluid-tight engagement, and the place, slit sticks with glue the agent bonding.
Among the present invention, between tenon and the tongue-and-groove with after the adhesive material gluing certain shear strength will being arranged, more than the general 3Mpa.In order to increase bonding strength, between the two adjacent web veneers 3 of the present invention, between top flange outside plate 1 and the top flange inner panel 2, and between bottom flange inner panel 4 and the bottom flange outside plate 5, except connecting with structure glue, also available simultaneously bolt is strengthened.
In the another embodiment of the present invention, top flange outside plate 1, top flange inner panel 2, bottom flange inner panel 4, bottom flange outside plate 5 all adopt the bamboo wood laminate, the bamboo offset plate that promptly is overrided to form to the bamboo chip gluing by folk prescription, and the vertical compressive strength of this plate is high; Web veneer 3 adopts bamboo plywoods, the bamboo offset plate that promptly is overrided to form by the bamboo chip gluing of quadrature, and two-way shear strength is high in this plate face.
In the another embodiment of the present invention, tenon 7 is with respect to the plate face tilt of web veneer, and tongue-and-groove 6 also favours inner panel plate face accordingly, and the angle of inclination of the angle of inclination of tongue-and-groove 6 and tenon 7 is complementary, and can resist beam and receive the power that starts when curved.
As shown in Figure 2 is decomposition chart of the present invention; The practical implementation step is following: at first make tenon at web 3 upper and lower surfaces; On top flange inner panel 2 and bottom flange inner panel 4, hollow out the making tongue-and-groove, link together all webs 3 with structure glue then, with structure glue or bolt respectively top flange plate outside plate 1 and top flange inner panel 2, bottom flange inner panel 4 and the bottom flange outside plate 5 whole plate of bonding formation of colding pressing; The tenon 7 that will be coated with bonding adhesive at last buckles in the tongue-and-groove 6 of frange plate; Be cold-pressed into beam, realize that web engages with the upper and lower edge of a wing, bear longitudinal shear.
The bamboo offset plate material that adopted is the product of bamboo offset plate difficult to understand factory in the Anji city, outsourcing Zhejiang Province in embodiments of the invention and the test.
The bamboo offset plate mainly contains following production procedure: bamboo wood cut into slices-go green grass or young crops-block-spreading-drying-impregnation-drying-assembly-hot pressing-cutting edge, and concrete production technology is:
1. former bamboo is cut into slices, remove the relatively low innermost layer of outermost layer and intensity;
2. with rope bamboo chip is linked up, make bamboo mat or bamboo curtain splint, be convenient to assembly like this;
3. bamboo curtain splint is dried, kill the insect in the bamboo wood and remove moisture content, prevent the bamboo wood insect pest and because of moisture content rots, the bamboo curtain splint that dries is put into the phenolic resin glue pond again;
4. after treating that the bamboo curtain splint impregnation fully, in the glue pond, bamboo curtain splint is picked up, dry;
5. next be the production phase of bamboo plywood, the bamboo curtain splint that will dry is formed base;
6. after having organized badly, can the bamboo base be sent in the machine, carry out high temperature and steam pressure, about 20 minutes;
7. after the cooling, remove irregular limit, bamboo plywood is made into corresponding size.
Claims (5)
1. bamboo offset plate girder construction; It is characterized in that; Comprise the top flange plate, web and the bottom wing listrium that connect successively that the bamboo offset plate is processed; Said top flange plate is formed by connecting top flange outside plate (1) and the top flange inner panel (2) that is positioned at said top flange outside plate (1) downside; Said bottom wing listrium is formed by connecting bottom flange outside plate (5) and the bottom flange inner panel (4) that is positioned at said bottom flange outside plate (5) upside; Said web comprises superimposed a plurality of web veneers (3), said web veneer (3) be provided with spaced tenon (7) with the inner panel facing surfaces, the tenon (7) on the two adjacent web veneers (3) is staggered; Be provided with on said top flange inner panel (2) and the bottom flange inner panel (4) and the size of said tenon (7), the tongue-and-groove (6) that distributing position is complementary, tenon (7) embeds in the said tongue-and-groove (6).
2. bamboo offset plate girder construction according to claim 1; It is characterized in that; Said top flange outside plate (1), top flange inner panel (2), bottom flange inner panel (4), bottom flange outside plate (5) all adopt the bamboo wood laminate, and said web veneer (3) adopts bamboo plywood.
3. bamboo offset plate girder construction according to claim 1 and 2; It is characterized in that; Said tenon (7) is with respect to the plate face tilt of web veneer, and said tongue-and-groove (6) also favours inner panel plate face accordingly, and the angle of inclination of the angle of inclination of tongue-and-groove (6) and tenon (7) is complementary.
4. bamboo offset plate girder construction according to claim 1 and 2 is characterized in that, connects with structure glue between the two adjacent web veneers (3), strengthens with bolt simultaneously.
5. bamboo offset plate girder construction according to claim 1 and 2 is characterized in that, between said top flange outside plate (1) and the top flange inner panel (2), between bottom flange inner panel (4) and the bottom flange outside plate (5), all connects with structure glue, strengthens with bolt simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110444118XA CN102561168A (en) | 2011-12-27 | 2011-12-27 | Bamboo plywood beam structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110444118XA CN102561168A (en) | 2011-12-27 | 2011-12-27 | Bamboo plywood beam structure |
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| CN102561168A true CN102561168A (en) | 2012-07-11 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276813A (en) * | 2013-05-14 | 2013-09-04 | 南京工业大学 | Contact surface reinforcing type long-span gluing wooden pillar beam connecting structure |
| CN108331253A (en) * | 2018-04-05 | 2018-07-27 | 南京林业大学 | A kind of bamboo matter gluing box beam |
| CN109723185A (en) * | 2019-03-01 | 2019-05-07 | 南京林业大学 | A kind of upper and lower joggle beam of bamboo wood |
| CN109779268A (en) * | 2019-02-25 | 2019-05-21 | 上海城建建设实业(集团)有限公司 | The construction method of fragment integrated form T plate |
| CN109914691A (en) * | 2019-02-25 | 2019-06-21 | 河海大学 | Bamboo-steel fiber reinforced concrete combination beam |
| CN113463838A (en) * | 2020-03-31 | 2021-10-01 | 中国地质大学（北京） | Combined T-shaped beam and manufacturing method thereof |
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| CN101624873A (en) * | 2009-07-10 | 2010-01-13 | 杨登军 | Embedded stereoscopic plastic template |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276813A (en) * | 2013-05-14 | 2013-09-04 | 南京工业大学 | Contact surface reinforcing type long-span gluing wooden pillar beam connecting structure |
| CN103276813B (en) * | 2013-05-14 | 2016-04-27 | 南京工业大学 | Contact surface enhancement mode large span gummed pin beam syndeton |
| CN108331253A (en) * | 2018-04-05 | 2018-07-27 | 南京林业大学 | A kind of bamboo matter gluing box beam |
| CN109779268A (en) * | 2019-02-25 | 2019-05-21 | 上海城建建设实业(集团)有限公司 | The construction method of fragment integrated form T plate |
| CN109914691A (en) * | 2019-02-25 | 2019-06-21 | 河海大学 | Bamboo-steel fiber reinforced concrete combination beam |
| CN109779268B (en) * | 2019-02-25 | 2021-04-16 | 上海城建建设实业(集团)有限公司 | Construction method of large-span segmented integrated double-T plate |
| CN109723185A (en) * | 2019-03-01 | 2019-05-07 | 南京林业大学 | A kind of upper and lower joggle beam of bamboo wood |
| CN113463838A (en) * | 2020-03-31 | 2021-10-01 | 中国地质大学（北京） | Combined T-shaped beam and manufacturing method thereof |
| CN113463838B (en) * | 2020-03-31 | 2022-10-25 | 中国地质大学（北京） | Combined T-shaped beam and manufacturing method thereof |
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Application publication date: 20120711 |