[go: up one dir, main page]

CN102261145A - Integrally two-way and locally one-way steel-concrete slab composite floor system and construction method thereof - Google Patents

Integrally two-way and locally one-way steel-concrete slab composite floor system and construction method thereof Download PDF

Info

Publication number
CN102261145A
CN102261145A CN2011101017805A CN201110101780A CN102261145A CN 102261145 A CN102261145 A CN 102261145A CN 2011101017805 A CN2011101017805 A CN 2011101017805A CN 201110101780 A CN201110101780 A CN 201110101780A CN 102261145 A CN102261145 A CN 102261145A
Authority
CN
China
Prior art keywords
steel
way
girder
concrete
slab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011101017805A
Other languages
Chinese (zh)
Inventor
聂建国
聂鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Original Assignee
Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsinghua University filed Critical Tsinghua University
Priority to CN2011101017805A priority Critical patent/CN102261145A/en
Publication of CN102261145A publication Critical patent/CN102261145A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Bridges Or Land Bridges (AREA)

Abstract

本发明涉及一种整体双向局部单向钢-混凝土组合楼盖及其施工方法，属于结构工程领域。本发明由整体双向钢主梁、局部单向钢次梁、混凝土板组成。所述双向钢主梁为工字型截面或箱形截面；所述局部单向钢次梁为工字型截面；所述混凝土板可采用现浇或预制或叠合混凝土板，支承于双向钢主梁、单向钢次梁的上翼缘并覆盖钢梁间的区格。本发明的整体双向局部单向钢-混凝土组合楼盖可以通过组合作用充分发挥材料特性，实现整体双向支承的受力效果，同时由于双向组合主梁区格内钢次梁采用单向布置，可在保证结构受力性能的基础上，减少节点数量，进一步方便钢结构的施工。

Figure 201110101780

The invention relates to an integral two-way partial one-way steel-concrete composite floor and a construction method thereof, belonging to the field of structural engineering. The invention consists of an integral two-way steel main girder, a local one-way steel secondary girder and a concrete slab. The two-way steel main girder is an I-shaped section or a box-shaped section; the local one-way steel secondary beam is an I-shaped section; The upper flanges of main beams and unidirectional steel secondary beams cover the grids between steel beams. The overall two-way partial one-way steel-concrete composite floor of the present invention can fully exert the material characteristics through the combination effect, and realize the force effect of the overall two-way support. On the basis of ensuring the mechanical performance of the structure, the number of nodes is reduced to further facilitate the construction of the steel structure.

Figure 201110101780

Description

Whole two-way part unidirectional steel-concrete plate composite floor system and job practices thereof
Technical field
The present invention relates to a kind of novel building cover structure (15m≤span L≤70m), belong to the Structural Engineering field of striding greatly.
Background technology
In the traditional architecture structure, adopt the steel-concrete composite beam superstructure of steel concrete girt strip type superstructure, steel concrete intersecting parallels superstructure or unidirectional supporting usually.But, when the planar dimension of building and post apart from enlarging markedly or indoor when not allowing to establish the vertical support member, these floor structural forms can't satisfy the requirement of large-span structure development on supporting capacity, anti-seismic performance.The bidirectional steel-stacked plate concrete composite building roof that has developed has solved the problems referred to above, but its number of nodes is more, and corresponding increase node connects workload, and because of the decussation node steel using amount that causes on the high side bigger than normal.
Summary of the invention
The object of the present invention is to provide a kind of bearing capacity height, structure height is low, the decussation node is few, steel using amount the is little unidirectional steel-concrete composite floor system in whole two-way part, arrange raising superstructure rigidity by increasing secondary beam, increase girder district lattice span, save steel using amount, reduce number of nodes simultaneously, make things convenient for Construction of Steel Structure, help accelerating speed of application, guarantee construction quality.
Technical scheme of the present invention is as follows:
The unidirectional steel-concrete composite floor system in the two-way part of a kind of integral body is characterized in that: formed, and by shear connector 4 described each several part is combined into integral body by two-way steel girder 1, unidirectional steel secondary beam 2, concrete slab 3; Described two-way steel girder 1 adopts i section steel beam or box steel beam, is positioned at the lower floor of superstructure; Described unidirectional steel secondary beam 2 adopts i-shape steel beam, is arranged in the girder district lattice by single load bearing; Steel girder 1, steel secondary beam 2 intersect to form the girder steel grid; Described concrete slab 3 is supported on the top flange of intersection girder steel and covers the district's lattice that intersect between girder steel.
Described concrete slab 3 is cast-in-place or prefabricated superimposed concrete slab, also prestressed slab.
1 pair of superstructure of described two-way steel girder plays the effect of two-way supporting, and two-way steel girder district compartment is by the stressed layout steel of one-way slabs secondary beam 2.
The job practices of the two-way part of a kind of integral body unidirectional steel-concrete plate composite floor system is characterized in that described construction method step is as follows:
(1) make steel girder 1, steel secondary beam 2 in factory process, and welding shear connector 4;
(2) scene finish between the steel girder, being connected between steel secondary beam and the steel girder, steel girder 1, steel secondary beam 2 intersect to form the girder steel grid;
(3) after girder steel grid installation in position, concrete slab 3 is installed, is adopted cast in place concrete plate, then support with the girder steel bottom flange earlier, template, fluid concrete again; Or the employing precast concrete plank, then hoisting prefabricated concrete slab guarantees that to the girder steel top flange lapped length of steel bar is not less than 5cm in the plate earlier, in pouring concrete ater-casting, notch place plate abutted seam place, or adopting the superimposed sheet compoboard, the precast plate of then mating formation is earlier built last layer again.
The present invention has the following advantages with respect to prior art and the high-lighting effect:
Compare with steel concrete girt strip type superstructure, steel concrete intersecting parallels superstructure, the unidirectional steel-concrete composite floor system in whole two-way part can alleviate dead load greatly, reduce structure height, utilize the girder steel supporting template, improve formwork speed, reduce template consumption and on-site concrete wet trade amount, be convenient to three-dimensional construction, shorten the construction period.Compare with traditional unidirectional supporting steel-concrete composite beam superstructure, can reduce structure height greatly, improve structural bearing capacity and rigidity.Compare with existing two-way steel-concrete folding plate composite floor system, the present invention can pass through the reasonable Arrangement secondary beam, improve superstructure rigidity, increase girder district lattice span, reduce girder and arrange, reduce the decussation number of nodes, save steel using amount, simultaneously, help further accelerating the speed of application of steel work, guarantee construction quality
Description of drawings
Fig. 1 is the schematic perspective view of whole two-way part unidirectional steel-concrete plate composite floor system among the present invention.
Among the figure: the two-way steel girder of 1-; The unidirectional steel secondary beam of 2-; The 3-concrete slab; The 4-shear connector.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
The two-way part of integral body provided by the invention unidirectional steel-concrete plate composite floor system is formed, and by shear connector 4 each several part is combined into whole co-operation by two-way steel girder 1, unidirectional steel secondary beam 2, concrete slab 3 three parts.Two-way steel girder 1 can be i section steel beam or box steel beam, is positioned at the lower floor of superstructure.Can adopt bolt to be connected or welding manner between the two-way steel girder 1 and with the connected mode of unidirectional steel secondary beam 2, girder steel quantity, sectional dimension and girder steel spacing are determined according to instructions for use.Shear connector 4 can adopt forms such as peg, channel-section steel, is with girder steel and the concrete slab cooperative parts that link together.Concrete slab 3 be supported on intersect girder steel the top flange and cover the district's lattice that intersect between girder steel, for cast-in-place or precast concrete plank or superimposed sheet, can apply prestressing force, also prestressed slab as needs; If adopt precast concrete plank, then lapped length of steel bar is not less than 5cm in the plate, connects by late poured band, and the ater-casting should guarantee the concrete density in notch place; If adopt cast in place concrete plate, then should dispose the reinforcing bar of some, prevent contraction, thermal cracking, satisfy the hogging moment area force request simultaneously.If adopt the superimposed sheet compoboard, the precast plate of then mating formation is earlier built last layer again.
Working procedure of the present invention is:
(1) make steel girder 1, steel secondary beam 2 in factory process, and welding shear connector 4;
(2) scene finish between the steel girder, being connected between steel secondary beam and the steel girder, form girder steel grid (steel girder 1, steel secondary beam 2);
(3) after girder steel grid (steel girder 1, steel secondary beam 2) installation in position, concrete slab 3 is installed.If adopt cast in place concrete plate, then support earlier template, fluid concrete again with the girder steel bottom flange; If adopt precast concrete plank, then hoisting prefabricated concrete slab guarantees that to the girder steel top flange lapped length of steel bar is not less than 5cm in the plate earlier, in pouring concrete ater-casting, notch place plate abutted seam place, if adopt the superimposed sheet compoboard, the precast plate of then mating formation is earlier built last layer again.

Claims (4)

1.一种整体双向局部单向钢-混凝土组合楼盖，其特征在于：由双向钢主梁(1)、单向钢次梁(2)、混凝土板(3)组成，并通过抗剪连接件(4)将所述各部分组合成整体；所述的双向钢主梁(1)采用工字形钢梁或箱形钢梁，位于楼盖的下层；所述单向钢次梁(2)采用工字型钢梁，按单向受力布置于主梁区格内；钢主梁(1)、钢次梁(2)交叉形成钢梁网格；所述混凝土板(3)支承于交叉钢梁的上翼缘并覆盖交叉钢梁间的区格。1. An integral two-way partial one-way steel-concrete composite floor, characterized in that: it consists of two-way steel main beams (1), one-way steel secondary beams (2), and concrete slabs (3), and is connected by shear resistance Parts (4) combine the various parts into a whole; the two-way steel main girder (1) adopts an I-shaped steel girder or a box-shaped steel girder, and is located on the lower floor of the floor; the one-way steel secondary girder (2) I-shaped steel beams are adopted, arranged in the main beam area according to the one-way force; the steel main beam (1) and the steel secondary beam (2) cross to form a steel beam grid; the concrete slab (3) is supported on the cross The upper flange of the steel beams and covers the grid between the crossing steel beams. 2.根据权利要求1所述的整体双向局部单向钢-混凝土板组合楼盖，其特征在于：所述的混凝土板(3)为现浇或预制叠合混凝土板，亦可是预应力板。2. The overall two-way partial one-way steel-concrete slab composite floor according to claim 1, characterized in that: said concrete slab (3) is cast-in-situ or prefabricated laminated concrete slab, or prestressed slab. 3.根据权利要求1所述的整体双向局部单向钢-混凝土板组合楼盖，其特征在于：双向组合梁(1)对楼盖起到双向支承的作用，主梁区格间按单向板受力布置钢次梁(2)。3. The overall two-way partial one-way steel-concrete slab composite floor according to claim 1, characterized in that: the two-way composite beam (1) plays a two-way supporting role for the floor, and the main beam compartments are unidirectional Steel secondary beams (2) are arranged for the stress on the slab. 4.根据权利要求1-3中任一项所述的整体双向局部单向钢-混凝土板组合楼盖的施工方法，其特征在于，所述的施工方法步骤如下：4. according to the construction method of the overall two-way local one-way steel-concrete slab composite floor described in any one of claims 1-3, it is characterized in that, described construction method steps are as follows: (1)在工厂加工制作钢主梁(1)、钢次梁(2)，并焊接抗剪连接件(4)；(1) Manufacture steel main girder (1) and steel secondary girder (2) in factory, and weld shear connector (4); (2)现场完成钢主梁之间、钢次梁与钢主梁之间的连接，钢主梁(1)、钢次梁(2)交叉形成钢梁网格；(2) The connection between the steel main girders and between the steel secondary girders and the steel main girders is completed on site, and the steel girders (1) and the steel secondary girders (2) intersect to form a steel girder grid; (3)在钢梁网格安装就位之后安装混凝土板(3)，采用现浇混凝土板，则先以钢梁下翼缘作支撑，支模板，再浇注混凝土；或采用预制混凝土板，则先吊装预制混凝土板至钢梁上翼缘，保证板内钢筋搭接长度不小于5cm，在槽口处板端接缝处浇混凝土后浇带，或采用叠合板组合板，则先铺装预制板，再浇筑后浇层。(3) Install the concrete slab after the steel beam grid is installed in place (3). If the cast-in-place concrete slab is used, the lower flange of the steel beam is used as the support first, the formwork is supported, and then the concrete is poured; or the prefabricated concrete slab is used, then First hoist the precast concrete slab to the upper flange of the steel beam to ensure that the overlapping length of the steel bars in the slab is not less than 5cm. After pouring concrete at the joints of the slab ends at the slot, or using a composite slab, lay the precast slab first. Pour the layer after pouring.
CN2011101017805A 2011-04-22 2011-04-22 Integrally two-way and locally one-way steel-concrete slab composite floor system and construction method thereof Pending CN102261145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011101017805A CN102261145A (en) 2011-04-22 2011-04-22 Integrally two-way and locally one-way steel-concrete slab composite floor system and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011101017805A CN102261145A (en) 2011-04-22 2011-04-22 Integrally two-way and locally one-way steel-concrete slab composite floor system and construction method thereof

Publications (1)

Publication Number Publication Date
CN102261145A true CN102261145A (en) 2011-11-30

Family

ID=45007963

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011101017805A Pending CN102261145A (en) 2011-04-22 2011-04-22 Integrally two-way and locally one-way steel-concrete slab composite floor system and construction method thereof

Country Status (1)

Country Link
CN (1) CN102261145A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102653955A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tension prestressed concrete single-layer T-shaped frame box structure
CN102653958A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete double-layer I-shaped framework box-type structure
CN102653954A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete double-layer variable section plate box-type structure
CN102653953A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete single-layer variable section plate box-type structure
CN102653957A (en) * 2012-03-15 2012-09-05 中国建筑科学研究院 Inner tensioning pre-stressed concrete double-layer T-shaped framework box-type structure
CN102926462A (en) * 2012-09-13 2013-02-13 上海江欢成建筑设计有限公司 Building connecting bridge
CN103290966A (en) * 2013-06-20 2013-09-11 赵永利 Floor slab component
CN103306202A (en) * 2013-06-14 2013-09-18 中铁大桥局集团第二工程有限公司 Steel panel used in fabricated Bailey truss in matching manner
CN104389374A (en) * 2014-11-02 2015-03-04 中国矿业大学(北京) Combined dense rib plate as well as manufacturing method and assembled type plate-column structure thereof
CN104895231A (en) * 2015-04-30 2015-09-09 宁波大学 Assembled composite floor slab and manufacturing method thereof
CN106368361A (en) * 2016-10-21 2017-02-01 王海崴 Assembly type hidden beam floor system
CN106381952A (en) * 2016-10-21 2017-02-08 王海崴 Assembling type overlapped cavity floor cover
CN106894557A (en) * 2017-04-26 2017-06-27 上海核工程研究设计院 A kind of two-way steel plate concrete composite floor of built-in module truss
CN111236309A (en) * 2020-02-28 2020-06-05 无锡地铁集团有限公司 A construction method of prefabricated prestressed slabs for prefabricated underground stations
CN114991483A (en) * 2022-08-04 2022-09-02 北京建工集团有限责任公司 Construction method of large-span suspension ridge hyperbolic inverted arch skew single-layer grid structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000129849A (en) * 1998-10-21 2000-05-09 Kumagai Gumi Co Ltd Building
CN1490476A (en) * 2003-08-28 2004-04-21 杨大俦 Industrial light acoustic steel building and roof
CN101173542A (en) * 2007-11-23 2008-05-07 清华大学 Two-way steel-laminated slab concrete composite floor
JP2010242426A (en) * 2009-04-08 2010-10-28 Ohbayashi Corp Double floor structure
CN201786045U (en) * 2010-09-28 2011-04-06 杨峰 House structure with combined steel beam and pretensioning method prestress laminated beam
CN202144641U (en) * 2011-04-22 2012-02-15 清华大学 Integral bidirectional local unidirectional steel-concrete slab composite floor system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000129849A (en) * 1998-10-21 2000-05-09 Kumagai Gumi Co Ltd Building
CN1490476A (en) * 2003-08-28 2004-04-21 杨大俦 Industrial light acoustic steel building and roof
CN101173542A (en) * 2007-11-23 2008-05-07 清华大学 Two-way steel-laminated slab concrete composite floor
JP2010242426A (en) * 2009-04-08 2010-10-28 Ohbayashi Corp Double floor structure
CN201786045U (en) * 2010-09-28 2011-04-06 杨峰 House structure with combined steel beam and pretensioning method prestress laminated beam
CN202144641U (en) * 2011-04-22 2012-02-15 清华大学 Integral bidirectional local unidirectional steel-concrete slab composite floor system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
聂建国、陶慕轩、黄远、田淑明、陈戈: "钢-混凝土组合结构体系研究新进展", 《建筑结构学报》 *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102653955B (en) * 2012-03-15 2013-11-20 北京市轨道交通建设管理有限公司 Inner tension prestressed concrete single-layer T-shaped frame box structure
CN102653958B (en) * 2012-03-15 2013-09-11 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete double-layer I-shaped framework box-type structure
CN102653954A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete double-layer variable section plate box-type structure
CN102653953A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete single-layer variable section plate box-type structure
CN102653957A (en) * 2012-03-15 2012-09-05 中国建筑科学研究院 Inner tensioning pre-stressed concrete double-layer T-shaped framework box-type structure
CN102653955A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tension prestressed concrete single-layer T-shaped frame box structure
CN102653954B (en) * 2012-03-15 2013-09-11 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete double-layer variable section plate box-type structure
CN102653958A (en) * 2012-03-15 2012-09-05 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete double-layer I-shaped framework box-type structure
CN102653953B (en) * 2012-03-15 2013-11-20 北京市轨道交通建设管理有限公司 Inner tensioning pre-stressed concrete single-layer variable section plate box-type structure
CN102653957B (en) * 2012-03-15 2013-09-11 中国建筑科学研究院 Inner tensioning pre-stressed concrete double-layer T-shaped framework box-type structure
CN102926462B (en) * 2012-09-13 2015-01-21 上海江欢成建筑设计有限公司 Building connecting bridge
CN102926462A (en) * 2012-09-13 2013-02-13 上海江欢成建筑设计有限公司 Building connecting bridge
CN103306202A (en) * 2013-06-14 2013-09-18 中铁大桥局集团第二工程有限公司 Steel panel used in fabricated Bailey truss in matching manner
CN103306202B (en) * 2013-06-14 2015-04-29 中铁大桥局集团第二工程有限公司 Steel panel used in fabricated Bailey truss in matching manner
CN103290966A (en) * 2013-06-20 2013-09-11 赵永利 Floor slab component
CN104389374A (en) * 2014-11-02 2015-03-04 中国矿业大学(北京) Combined dense rib plate as well as manufacturing method and assembled type plate-column structure thereof
CN104895231B (en) * 2015-04-30 2017-04-12 宁波大学 Assembled composite floor slab and manufacturing method thereof
CN104895231A (en) * 2015-04-30 2015-09-09 宁波大学 Assembled composite floor slab and manufacturing method thereof
CN106368361A (en) * 2016-10-21 2017-02-01 王海崴 Assembly type hidden beam floor system
CN106381952A (en) * 2016-10-21 2017-02-08 王海崴 Assembling type overlapped cavity floor cover
CN106381952B (en) * 2016-10-21 2019-03-26 王海崴 A kind of assembled overlapping cavity building roof
CN106368361B (en) * 2016-10-21 2019-04-05 王海崴 A kind of assembled concealed-beam floor
CN106894557A (en) * 2017-04-26 2017-06-27 上海核工程研究设计院 A kind of two-way steel plate concrete composite floor of built-in module truss
CN111236309A (en) * 2020-02-28 2020-06-05 无锡地铁集团有限公司 A construction method of prefabricated prestressed slabs for prefabricated underground stations
CN114991483A (en) * 2022-08-04 2022-09-02 北京建工集团有限责任公司 Construction method of large-span suspension ridge hyperbolic inverted arch skew single-layer grid structure

Similar Documents

Publication Publication Date Title
CN102261145A (en) Integrally two-way and locally one-way steel-concrete slab composite floor system and construction method thereof
CN100451263C (en) Bidirectional steel-stacked plate concrete composite building roof
CN101851984B (en) Prefabricated steel-concrete composite beam
CN204876059U (en) Prefabricated assembled shaped steel concrete frame structure system
CN105839823B (en) A kind of hollow superposed floor of close rib of truss-like
CN104453093B (en) Prefabricated steel reinforced concrete beam with transversal high-strength concrete clapboard, and construction method
WO2013166658A1 (en) Method of casting in-situ steel wire mesh cement slab with spliced rack and suspended formwork
CN107217787B (en) Built-in profiled sheet groove structure's assembled even roof beam
CN104594556A (en) Prefabricated type steel reinforced concrete beam with transverse steel partition boards and construction method
CN105133486A (en) Corrugated steel web few-main-beam structure
CN104179249A (en) Assembled composite-structure earthquake-resistant wall and assembly method thereof
CN204919302U (en) Few main girder structure of wave form steel web
CN105649249A (en) Bidirectional profiled steel sheet and concrete composite floor slab internally provided with hollow circular steel pipes
CN107916740A (en) Double slope grid shell roof structures of assembled large-span concrete and preparation method thereof
CN111779190A (en) A kind of hollow composite beam and its manufacturing method
CN101435237A (en) Novel hollow combined board
CN207686092U (en) A kind of assembled overlapped hollow floor system
CN215054413U (en) Assembled reinforced concrete bidirectional dense rib laminated slab floor
CN107989247B (en) Assembled superposed hollow floor system and construction method thereof
CN202144641U (en) Integral bidirectional local unidirectional steel-concrete slab composite floor system
CN203603370U (en) Prestress perforation-shaped web box type steel reinforced concrete composite beam
CN208933808U (en) Steel-concrete composite continuous beam with mixed web of flat steel plate and corrugated steel plate
CN208088624U (en) The double slope grid shell roof structures of assembled large-span concrete
CN218643645U (en) A fully assembled reinforced concrete floor slab connected by steel-concrete composite structure
CN110424600A (en) It is a kind of it is distributed after pour assembled integral prefabricated concrete hollow slab rib-beam floor frame and its construction method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20111130