CN1031658C - Precast monolithic prestressed frame beam used for entresol - Google Patents
Precast monolithic prestressed frame beam used for entresol Download PDFInfo
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- CN1031658C CN1031658C CN 92105330 CN92105330A CN1031658C CN 1031658 C CN1031658 C CN 1031658C CN 92105330 CN92105330 CN 92105330 CN 92105330 A CN92105330 A CN 92105330A CN 1031658 C CN1031658 C CN 1031658C
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- web member
- chord
- prestressed
- lower chord
- frame beam
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Abstract
The present invention relates to a prefabricated integrative prestressed frame girder as an entresol, which is characterized in that the prefabricated integrative prestressed frame girder is in a hollow chamber type; the cross sections of an upper chord and a lower chord are in a T shape; the end joint of the upper chord is a rectangular cross section; the end joint of the lower chord is an inverse T-shaped cross section; bundling ribs formed by bonding prestressed rib set are arranged in a brace bar and the lower chord, and the bundling ribs are arranged in curves and lines; the end part of the frame girder is provided with a bearing plate, and the bundling ribs are stretched and fixed on the bearing plate. An entresol is formed after the prestressed frame girder is connected with hollow columns, and the building area is not calculated. The prefabricated integrative prestressed frame girder is suitable for the major structure of multilayer or high-rise buildings of single span and multiple spans and the force transferring structure of a heavy-load long span.
Description
The invention belongs to structural element, be a kind of by new design theory be stress ratio " Method of Degree of Prestress " design and produce as the precast monolithic prestressed frame beam of interlayer.
The partial prestressing member of modern high efficient prestress reinforced concrete structure, its arrangement of reinforcement characteristics are the hybrid reinforcement types that belong to high-strength prestress steel hinge line and regular screw threads reinforcing bar.
Precast monolithic prestressed frame beam as interlayer has adopted " Method of Degree of Prestress " just, characteristics according to structural element performance requirement, material therefor, and residing ambient conditions, selected suitable degree of prestressing size, determine the prestress reinforcement amount of its prestressed structure and the arrangement of reinforcement ratio of indented bars, and satisfy the ultimate limit state of structure bearing capacity and use.
The precast beam of available frame structural system mostly is T shape, rectangle, trapezoidal or spend blue ellbeam, because its cross section insufficient height of way routinely, can not be as the structure interlayer.The existing structure interlayer does not utilize the structure deck-molding as interlayer.Chinese patent " multi-story long-span double-arch-centering structure system " number of patent application 88103454.1, be with the multilayer large spatial structure system of encircleing and modern prestressed reinforced concrete technology combines, be characterized in, with the rise of the bow member floor height as the large bay even level, bow member is following to be the large span odd-level.Though this system has been utilized the bow member structure space, but this layer has local a still not use as interlayer, be different from the interlayer that is parallel to floor layer in the frame system, the fixed structure also not by " Method of Degree of Prestress " design reinforcement, and resemble the frame construction connects.
The objective of the invention is, a kind of precast monolithic prestressed frame beam as interlayer is provided, adopt an amount of presstressed reinforcing steel, can change the structure at end and each position, also changed the stress performance of corresponding position, simplify prestressed construction technology and tensioning rollering fastening system.The body that utilizes structural element is simultaneously made full use of to form the space, designs novel form, so that form interlayer, has produced the land for building, space.
Precast monolithic prestressed frame beam as interlayer of the present invention, make upper chord by concrete material and bonded prestressed tendon and non-prestressed indented bars, lower chord, diagonal web member, straight web member and limit web member are formed, it is characterized in that, prestressed frame beam is the empty stomach form, the cross section of upper chord and lower chord is an inverted T shape, by upper chord, limit web member and diagonal web member connect into the last node of square-section, by lower chord, the limit web member connects into the lower node in inverted T shape cross section, on in the girder span, be provided with straight web member between lower chord, intersect with upper chord straight web member upper end, and lower end and diagonal web member intersect at lower chord; In diagonal web member and lower chord, be provided with the bunchy muscle of bonded prestressed tendon group, be straight line at diagonal member and lower chord place, be arrangement of curves at the intersection point place of straight web member, diagonal web member and lower chord; Be provided with bearing plate in end of frame girder, bunchy muscle entire beam tension be anchored on the bearing plate, duct grouting, sealing off and covering anchorage.
The making work progress that is used as the precast monolithic prestressed frame beam of interlayer of the present invention is: smooth place; Prop up the vertical frame beam forms; Be furnished with the reserving hole channel of binding prestress reinforcement; The reserving hole channel of the non-prestressing tendon of colligation simultaneously; While colligation non-prestressing tendon and net sheet; Disturbing concrete; Carry out cutting muscle, compiling bundle of presstressed reinforcing steel; Whole bundle is worn muscle; Add prestressing force and anchoring, grouting and sealing off and covering anchorage in advance.Promptly finished making as the precast monolithic prestressed frame beam of interlayer.
Advantage of the present invention is: the advantage aspect arrangement of reinforcement, for adopt high-strength with in strong material mixing cloth muscle mode, presstressed reinforcing steel is at end and middle part straight line and the continuous cloth muscle of curve, given full play to the efficient performance of prestressed material, improved the off normal of laced beam and the performance of tensional element simultaneously, structural element has been made full use of and rationally.
Advantage on frame beam structure is, precast monolithic prestressed frame beam as interlayer is a new structure on an empty stomach, this upper and lower chord member is connected with cavity sides, center pillar, Vierendeel girder wind up with lower edge on, each just is integral body after laying pre-stress floor, form the space, increased one deck building area; When design, because of control prestressed frame depth of beam is 2.2 meters, met the prescribed limit of not calculating building area, this has not only reduced floor height, and formed an interlayer, with pipeline such as place various electricity, gas, warm up, defend with as assistance building, can save the area, reduce building general height, save the cladding and the energy.Different as the precast monolithic prestressed frame beam of interlayer and general Vierendeel girder, each prestressed frame beam can be used as two-layer use, and promptly the prestressed frame beam position is as an interlayer, and prestressed frame beam lower floor is a normal layer.In multilayer or highrise building, adopt, then whenever build one deck prestressed frame beam, quite build two-layer building.Therefore be to suit measures to local conditions, make full use of the space to have more building area and satisfy a kind of novel pre-stressed frame beam structure system that technology arrangement requirement, structure combine with function.Be applicable to the multilayer of single span and multispan, high-rise industrial, civilian and the agent structure of public building and the power transmission layer structure that heavy duty is striden greatly.
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is the front view as the precast monolithic prestressed frame beam of interlayer
Fig. 2 is the A-A section of Fig. 1, the sectional drawing of prestressing force diagonal member member
Fig. 3 is the B-B section of Fig. 1, the sectional drawing of prestressed frame beam lower chord
As seen from the figure, precast monolithic prestressed frame beam as interlayer, by concrete material and bonded prestressed tendon and non-prestressing tendon is made chord member and web member is formed, it is characterized in that, prestressed frame beam is the empty stomach form, upper chord 1 is an inverted T shape with lower chord 2 cross sections, so that form interlayer behind the lay pre-stress floor, connect into the last node of square-section by upper chord 1, limit web member 3 and diagonal web member 4, connect into the lower node in inverted T shape cross section by lower chord 2, limit web member 3, last node is a rectangle so that be held on the bracket of the cavity post that supporting frame sets a roof beam in place; Be provided with straight web member 7 in the girder span between upper and lower chord member, straight web member 7 upper ends and upper chord 1 intersect, and lower chord 2 is given mutually with diagonal web member 4 in the lower end; Bonded prestressed tendon 6 is straight line at diagonal web member 4 with the lower chord place, intersection point place at straight web member, diagonal web member and lower chord is an arrangement of curves, there is bearing plate 5 perpendicular to presstressed reinforcing steel at the node place of winding up at end diagonal member 4, after whole bundle applies prestressing force, anchor grouting and sealing off and covering anchorage have just been finished the making of prestressed frame beam.Through being lifted on the junction of cavity post, form precast monolithic prestressed frame beam as interlayer.
Claims (1)
1, a kind of precast monolithic prestressed frame beam as interlayer, make upper chord by concrete material and bonded prestressed tendon and non-prestressed indented bars, lower chord, diagonal web member, straight web member and limit web member are formed, it is characterized in that, prestressed frame beam is the empty stomach form, the cross section of upper chord and lower chord is an inverted T shape, by upper chord, limit web member and diagonal web member connect into the last node of square-section, by lower chord, the limit web member connects into the lower node in inverted T shape cross section, on in the girder span, be provided with straight web member between lower chord, intersect with upper chord straight web member upper end, and lower end and diagonal web member intersect at lower chord; In diagonal web member and lower chord, be provided with the bunchy muscle of bonded prestressed tendon group, be straight line at diagonal member and lower chord place, be arrangement of curves at the intersection point place of straight web member, diagonal web member and lower chord; Be provided with bearing plate in end of frame girder, bunchy muscle entire beam tension be anchored on the bearing plate, duct grouting, sealing off and covering anchorage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105330 CN1031658C (en) | 1992-07-07 | 1992-07-07 | Precast monolithic prestressed frame beam used for entresol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105330 CN1031658C (en) | 1992-07-07 | 1992-07-07 | Precast monolithic prestressed frame beam used for entresol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1066702A CN1066702A (en) | 1992-12-02 |
| CN1031658C true CN1031658C (en) | 1996-04-24 |
Family
ID=4941313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92105330 Expired - Fee Related CN1031658C (en) | 1992-07-07 | 1992-07-07 | Precast monolithic prestressed frame beam used for entresol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031658C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268889B (en) * | 2017-06-26 | 2020-06-05 | 北京交通大学 | Prestressed aluminum-concrete combined truss girder and construction method thereof |
| CN108978865A (en) * | 2018-08-14 | 2018-12-11 | 兰州理工大学 | A kind of more high-rise assembled steel frame structures of the replaceable empty stomach energy consumption section of band |
-
1992
- 1992-07-07 CN CN 92105330 patent/CN1031658C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1066702A (en) | 1992-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |