CN103216035A - Ductility structure of reinforced concrete frame beam and construction method thereof - Google Patents
Ductility structure of reinforced concrete frame beam and construction method thereof Download PDFInfo
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- CN103216035A CN103216035A CN2013101297843A CN201310129784A CN103216035A CN 103216035 A CN103216035 A CN 103216035A CN 2013101297843 A CN2013101297843 A CN 2013101297843A CN 201310129784 A CN201310129784 A CN 201310129784A CN 103216035 A CN103216035 A CN 103216035A
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- vierendeel girder
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- horizontal joint
- stirrup
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Abstract
The invention discloses a ductility structure of a reinforced concrete frame beam and a construction method of the ductility structure. At least two horizontal sews are lengthways arranged along the height direction at two ends of the frame beam. Two sides of the horizontal sews are respectively provided with an additive lengthways rib, and the length of each additive lengthways rib is 1.5-2 times as long as the length of each horizontal sew; and tightened stirrups are arranged between the additive lengthways ribs and a common lengthways rib of the frame beam, tightened stirrups are further arranged among the additive lengthways ribs among the adjoining horizontal sews, and the stirrup reinforcement ratio of the tightened stirrups is more than 1.5 times as heavy as the stirrup reinforcement ratio of a common stirrup. After the ductility structure of the reinforced concrete frame beam and the construction method of the ductility structure are used, the flexural rigidity of a larger beam end can be properly adjusted, the bent cross-section characteristic of the beam can be adjusted from the aspects of rigidity and strength, and the shear bearing capacity of the beam can not be reduced, so that the realization of the strong-column, weak-beam, beam end strong-shear and beam end weak-bend concept can be guaranteed. After the ductility horizontal sews are arranged, the shearing action of the beam end to beam column panel points can be improved, and the bad characteristic caused by the shear failure of the beam column panel points can be reduced.
Description
Technical field
The present invention relates to reinforced concrete frame structure anti-seismic technology field, particularly relate to the ductility structural system after a kind of reinforced concrete frame structure framework beam-ends is provided with horizontal joint, make the implementation method and the joint construction of conceptual designs such as the easier formation strong column and weak beam of frame construction, strong shear capacity and weak bending capacity, the weak rod member of strong node.
Background technology
Along with the building structure seimic disaster census is analyzed and research, performance design and the ductility design concept of building in anti-seismic technology is rooted in the hearts of the people.In each conventional structural system, reinforced concrete frame structure embodiment performance design and ductility design concept are the most abundant, and embodiment and the method for taking also should be readily appreciated that most and grasp.Reinforced concrete frame structure is by the internal force adjustment, reaches the target that big shake effect underframe beam-ends forms plastic hinge, makes frame construction form remarkable energy consume mechanism under big shake, thereby avoids the badly damaged of vertical posts class A of geometric unitA and avoid collapsing.
Under the target control that forms framework beam-ends plastic hinge, need carry out the internal force adjustment to the beam column member and the node of framework, shearing design load as beam-ends is greater than its corresponding moment of flexure design load, and node styletable moment of flexure value sum up and down is greater than node left and right sides beam-ends moment of flexure design load sum; Simultaneously, the suffered shearing design load of column section is greater than its corresponding moment of flexure design load, being cut bearing capacity and also will do corresponding amplification and adjust of node.The construction measure that regulation and stipulation is added in the measure of these internal force adjustment is the structure rod member design object that reaches strong column and weak beam, strong shear capacity and weak bending capacity, the weak rod member of strong node.
All previous earthquake shows, although followed the ductility designing requirement of standard to frame construction, the destructive characteristics of " the weak post of brutal " always appears in the frame construction by design such as " strong column and weak beam " principle, be that frame construction mainly produces destruction but not beam-ends at styletable, the shear failure of member is also many simultaneously takes place prior to bending failure, and the shear failure in bean column node district also makes building collapsing be difficult to avoid.The basic principle grave fault of these failure modes and framework seismic design, the principle that reaches the ductility design by the adjustment of antidetonation internal force is difficult to realize.
In the every factor that causes desirable ductility design to be difficult to carry out, there is the interior reinforcing bar co-operation of whole stressed and plate of superstructure and beam influenced by the amplification of curved bearing capacity to beam-ends is actual, the actual bearing capacity of being cut of beam body that has too high " dimensional effect " that causes of deck-molding to cause reduces, and the die-cut influence of the beam-ends moment of flexure of large scale beam to constuction joint zone under bean column node zone and the node arranged.In addition, for deck-molding greater than the high size of post more or bean column node regional when big, will significantly underestimate suffered moment of flexure of styletable and shearing by the member structure inner forces analytical model of not considering the node area size impact.Even after having considered that the internal force of strong column and weak beam is adjusted,, make styletable destroy in advance and take place because deformability of beam-ends own and rich degree are higher.
Defective at prior art exists proposes the present invention.
Summary of the invention
Technical problem to be solved by this invention provides a kind of reinforced concrete frame structure ductility construction measure, make that bigger beam-ends bending rigidity is able to suitable adjustment, the curved cross section property that is subjected to from rigidity and intensity two aspects adjustment beam, do not reduce the shearing supporting capacity of beam, thereby guarantee the realization of strong column and weak beam, beam-ends strong shear capacity and weak bending capacity notion.
For reaching above-mentioned ductility structure, technical scheme provided by the invention is: a kind of ductility structure of rc-frame-beam, the horizontal joint that is vertically arranged with at the both ends of Vierendeel girder.
Preferably, be provided with two horizontal joints at least on the described Vierendeel girder short transverse.
Described horizontal joint is a rectangle hole penetrating on the width of Vierendeel girder.Perhaps,
Described horizontal joint is the horizontal groove that concaves on the Vierendeel girder web both side surface.
The both sides of described horizontal joint are equipped with additional vertical muscle, and the length of additional vertical muscle is 1.5-2 times of horizontal joint length; Be provided with the encryption stirrup between the common vertical muscle of additional vertical muscle and Vierendeel girder self, also be provided with the encryption stirrup between the additional vertical muscle between the adjacent horizontal joint, the stirrup ratio of encrypting stirrup is more than 1.5 times of common stirrup.
The present invention also provides the job practices of the ductility structure of above-mentioned rc-frame-beam, may further comprise the steps:
The invention has the beneficial effects as follows:
1, will put in order and cut section bar with horizontal joint (groove) after highly separate, can be by design adjustment beam-ends bending rigidity, the comprehensive line rigidity levels of beam between post striden is optimized design, and the line ratio of rigidity of Vierendeel girder, post is in than reasonable levels.Especially for the bigger Vierendeel girder of span, not only to accomplish the strong column and weak beam of supporting capacity aspect, also answer on online rigidity levels, the node area deformation ability and carry out rational Design on Plane.
2, the framework beam-ends is joined hoop setting alone after highly separate, and can effectively reduce the shear-carrying capacity that the heavy in section dimensional effect causes and reduce.Simultaneously, improved stirrup to concrete operative constraint, though establish seam back concrete cross-section area weakening has been arranged, overall shear-carrying capacity still can keep being not less than the preceding level of seam of establishing.
3, the framework beam-ends behind the parting is different with common beam-ends to the shear action of bean column node, can effectively reduce the shear action of beam-ends moment of flexure to nodes domains, improve the stress of nodes domains, improve the margin of safety of nodes domains, guarantee the realization of the weak rod member conceptual design of strong node.
Description of drawings
When considered in conjunction with the accompanying drawings, by the reference following detailed, can more completely understand the present invention better and learn wherein many attendant advantages easily, but accompanying drawing described herein is used to provide further understanding of the present invention, constitute a part of the present invention, illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute to improper qualification of the present invention, wherein:
Fig. 1 is a job practices schematic diagram of the present invention;
Fig. 2 is a general structure schematic diagram of the present invention;
Fig. 3 is that A-A among Fig. 2 is to sectional view;
Fig. 4 adopts the structural representation of horizontal groove form for horizontal joint of the present invention.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
With reference to the accompanying drawings 1,2, specify the ductility structure of rc-frame-beam of the present invention below in conjunction with the job practices of ductility structure of the present invention,
The explanation of above example just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. the ductility of rc-frame-beam structure is characterized in that, the horizontal joint that is vertically arranged with at the both ends of Vierendeel girder.
2. the ductility of a kind of rc-frame-beam according to claim 1 structure is characterized in that, is provided with two horizontal joints on the described Vierendeel girder short transverse at least.
3. the ductility of a kind of rc-frame-beam according to claim 2 structure is characterized in that described horizontal joint is a rectangle hole penetrating on the width of Vierendeel girder.
4. the ductility of a kind of rc-frame-beam according to claim 2 structure is characterized in that described horizontal joint is the horizontal groove that concaves on the Vierendeel girder web both side surface.
5. according to the ductility structure of the described a kind of rc-frame-beam of arbitrary claim in the claim 1 to 4, it is characterized in that the both sides of described horizontal joint are equipped with additional vertical muscle, the 1.5-2 that additional length of indulging muscle is horizontal joint length doubly; Be provided with the encryption stirrup between the common vertical muscle of additional vertical muscle and Vierendeel girder self, also be provided with the encryption stirrup between the additional vertical muscle between the adjacent horizontal joint, the stirrup ratio of encrypting stirrup is more than 1.5 times of common stirrup.
6. the job practices of the ductility of rc-frame-beam structure is characterized in that: may further comprise the steps:
Step (101) in the setting up procedure of common vertical muscle of the Vierendeel girder of reinforced concrete frame structure and common stirrup, by the requirement that horizontal joint is set, is provided with between the seam of horizontal joint at Vierendeel girder two ends and separates the additional vertical muscle of beam and encrypt stirrup;
Step (102), the horizontal joint place at the Vierendeel girder two ends is provided with embedded template or embeds polyphenyl plate, installs outer template then;
Step (103) is carried out concrete building between Vierendeel girder both ends horizontal seam, and concreting is removed template between exterior sheathing and seam behind prescribed strength, form the horizontal joint at Vierendeel girder two ends; This horizontal joint is the horizontal groove that concaves on rectangle hole penetrating on the width of Vierendeel girder or the Vierendeel girder web both side surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013101297843A CN103216035A (en) | 2013-04-15 | 2013-04-15 | Ductility structure of reinforced concrete frame beam and construction method thereof |
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| CN2013101297843A CN103216035A (en) | 2013-04-15 | 2013-04-15 | Ductility structure of reinforced concrete frame beam and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669721A (en) * | 2013-12-25 | 2014-03-26 | 昆明理工大学 | Arching-effect-based reinforced concrete beam design method |
| CN107190915A (en) * | 2017-06-28 | 2017-09-22 | 华南理工大学 | A kind of butt welding stirrup and method for improving Vierendeel girder ductility |
| CN111421644A (en) * | 2020-04-13 | 2020-07-17 | 中国矿业大学 | Application of waste concrete block stone in concrete structure construction and mould device |
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| CN2312990Y (en) * | 1997-06-14 | 1999-04-07 | 李岭群 | X-shaped ribbed shear beam |
| CN2469094Y (en) * | 2001-03-17 | 2002-01-02 | 大庆油田建设设计研究院 | Composite and sandwich periphery beam |
| CN102121294A (en) * | 2010-12-20 | 2011-07-13 | 黄靓 | Notched heat-insulating beam |
| CN102251581A (en) * | 2011-04-29 | 2011-11-23 | 深圳市建筑设计研究总院有限公司 | Steel beam-reinforced concrete floor structure and construction method thereof |
| CN202324326U (en) * | 2011-11-17 | 2012-07-11 | 孙成建 | Bamboo building material and bamboo building load-bearing construction member |
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2013
- 2013-04-15 CN CN2013101297843A patent/CN103216035A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312990Y (en) * | 1997-06-14 | 1999-04-07 | 李岭群 | X-shaped ribbed shear beam |
| CN2469094Y (en) * | 2001-03-17 | 2002-01-02 | 大庆油田建设设计研究院 | Composite and sandwich periphery beam |
| CN102121294A (en) * | 2010-12-20 | 2011-07-13 | 黄靓 | Notched heat-insulating beam |
| CN102251581A (en) * | 2011-04-29 | 2011-11-23 | 深圳市建筑设计研究总院有限公司 | Steel beam-reinforced concrete floor structure and construction method thereof |
| CN202324326U (en) * | 2011-11-17 | 2012-07-11 | 孙成建 | Bamboo building material and bamboo building load-bearing construction member |
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| 任宇 等: "高层剪力墙中连梁设计", 《山西建筑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669721A (en) * | 2013-12-25 | 2014-03-26 | 昆明理工大学 | Arching-effect-based reinforced concrete beam design method |
| CN103669721B (en) * | 2013-12-25 | 2016-03-30 | 昆明理工大学 | A kind of method for designing of the reinforced concrete beam based on arching |
| CN107190915A (en) * | 2017-06-28 | 2017-09-22 | 华南理工大学 | A kind of butt welding stirrup and method for improving Vierendeel girder ductility |
| CN111421644A (en) * | 2020-04-13 | 2020-07-17 | 中国矿业大学 | Application of waste concrete block stone in concrete structure construction and mould device |
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Application publication date: 20130724 |