CN104775515A - Hidden beam reinforcement method for improving torsional property of Z-shaped column nodes - Google Patents
Hidden beam reinforcement method for improving torsional property of Z-shaped column nodes Download PDFInfo
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- CN104775515A CN104775515A CN201510156179.4A CN201510156179A CN104775515A CN 104775515 A CN104775515 A CN 104775515A CN 201510156179 A CN201510156179 A CN 201510156179A CN 104775515 A CN104775515 A CN 104775515A
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Abstract
The invention relates to a hidden beam reinforcement method for improving the torsional property of Z-shaped column nodes. According to the hidden beam reinforcement method, a Z-shaped column and a frame beam are arranged, wherein the Z-shaped column comprises a web and two flanges, wherein the flanges are positioned on the end parts of the web; each flange is internally provided with flange longitudinal bars and flange horizontal stirrups; each flange horizontal stirrup is arranged on the outer side of the corresponding flange longitudinal bar; the web is internally provided with web longitudinal bars and web horizontal stirrups, wherein each web horizontal stirrup is arranged on the outer side of the corresponding web longitudinal bar; the flange longitudinal bars and the web longitudinal bars at the intersection parts of the web and the flanges are for public use; hidden beams are arranged in the web horizontal stirrups; each hidden beam comprises hidden beam longitudinal bars and hidden beam closed stirrups, wherein the hidden beam longitudinal bars are arranged at four inner corners of each hidden beam closed stirrup; the hidden beam longitudinal bars are parallel to the web horizontal stirrups; the end parts of the hidden beam longitudinal bars are connected with the web longitudinal bars at the intersection parts of the web and the flanges. According to the hidden beam reinforcement method disclosed by the invention, the torsional property of the web part is effectively promoted, the torsion carrying capacity is larger and the safety reliability is better.
Description
Technical field
The invention belongs to reinforced concrete buildings technical field, relate to a kind of cast-in-place ordinary reinforced concrete Framed Structure with Special-Shaped Columns bean column node.
Background technology
Structure System with Special-shaped Column is a kind of novel structural system, and one of primary structure system having become dwelling construction.Along with the continuous propelling of Urbanization in China, the use reasonability of housing construction, flexibility, convenience are had higher requirement.Hetermorphiscal column refers to that the ratio that cross section limb is high and limb is thick is less than or equal to 4, and cross-sectional geometry be the pillar of " ten " font, "T"-shaped, " L " shape and " Z " shape, and the structure be made up of hetermorphiscal column and Vierendeel girder is called Framed Structure with Special-Shaped Columns; The rectangular column in general framework structure is replaced with T-shaped, L shape, cross and Z-section post in Framed Structure with Special-Shaped Columns, usual corner post is L tee section, side column is T section, center pillar is star section, when there is skew in post net axis, usual employing Z-section post is as transition mast, and Z-section post has been widely used in multi-storey and sub high-rise residence building.After 20 century 70s, Structure System with Special-shaped Column achieves good economic benefit, social benefit and environmental benefit in residential project practice, has good development prospect.
For cross shaped column frame joint, be favourable to structure stress under the hogging moment effect of beam-ends, and for the web place of Z-section frame joint, under the hogging moment effect of beam-ends, can produce moment of torsion, be very disadvantageous to structure stress.Therefore, the problem that Z-shaped Column border node is subject to turn round destruction under the hogging moment effect of beam-ends has become problem demanding prompt solution in steel concrete multi-storey and sub high-rise residence building.Relevantly in steel concrete Z-shaped Column border node core space web, add dark beam, not yet to find in the domestic and foreign literature strengthening the research and apply of the torsional property of Z-shaped post bean column node.
Summary of the invention
In order to overcome the deficiency that web position torsional property is poor, torsional capacity is less, security reliability is poor of the Z-shaped Column border node of existing steel concrete, the invention provides the dark beam Enhancement Method that a kind of effective lifting web position torsional property, torsional capacity are comparatively large, security reliability improves Z-shaped Column border node torsional property preferably.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of dark beam Enhancement Method improving Z-shaped Column border node torsional property, described Z-shaped Column border node comprises Z-shaped post and Vierendeel girder, described Z-shaped post comprises web and two edges of a wing, the described edge of a wing is positioned at the end of described web, arrange in the described edge of a wing that muscle and edge of a wing horizontal hoop are indulged in the edge of a wing, described edge of a wing horizontal hoop is arranged on the described edge of a wing and indulges outside muscle, arrange in described web that web indulges muscle and web horizontal hoop, described web horizontal hoop is arranged on the outside that muscle indulged by described web, muscle is indulged on the edge of a wing of described web and intersection, the edge of a wing, it is public that muscle indulged by web, in described web horizontal hoop, dark beam is set, described dark beam comprises dark beam and indulges muscle and dark beam closed stirrup, four interior angle places of described dark beam closed stirrup arrange that described dark beam indulges muscle, described dark beam indulges muscle and described web horizontal hoop be arranged in parallel, described dark beam is indulged muscle end and is indulged muscle with web with the web of intersection, the edge of a wing and be connected.
Further, described dark depth of beam is identical with described framework depth of beam.
Further again, the reinforcement ratio that muscle indulged by the one-sided web in the upper and lower edge of dark beam should not be less than 0.15%, and the diameter of web reinforcement should not be less than 12mm, and is no less than 2.
Dark beam is indulged the web that muscle is anchored at web and intersection, the edge of a wing and is indulged in muscle, and anchorage length is more than or equal to threshold value l
a; The diameter of dark beam closed stirrup is identical with web horizontal hoop, and spacing is less than or equal to 100mm, and the end of dark beam closed stirrup makes 135 ° of crotches, and crotch termination flat segments length is more than or equal to 10d, and d is the diameter of dark beam closed stirrup.
The two piece webs relative at least one group of Z-shaped center line both sides are indulged between muscle and are arranged tension rib.One group of tension rib can be set as required, also can be many groups.
Beneficial effect of the present invention is mainly manifested in: add dark beam at Z-shaped post bean column node web core space, have good humidification, can improve the torsional property of Z-shaped Column border node, effectively can improve the Torsion bearing capacity of Z-shaped Column border node to Z-shaped Column border node.
Accompanying drawing explanation
Fig. 1 is the structure side view of Z-shaped Column border node.。
Fig. 2 is A-A section amplification plan view in Fig. 1.
Fig. 3 is B-B section amplification plan view in Fig. 1.
Fig. 4 is concrete Z-shaped Column border node Vierendeel girder end-view.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1 ~ Fig. 4, a kind of dark beam Enhancement Method improving Z-shaped Column border node torsional property, described Z-shaped Column border node comprises Z-shaped post 2 and Vierendeel girder 3, described Z-shaped post 2 comprises web and two edges of a wing, the described edge of a wing is positioned at the end of described web, arrange in the described edge of a wing that muscle and edge of a wing horizontal hoop 10 are indulged in the edge of a wing, described edge of a wing horizontal hoop 10 is arranged on the described edge of a wing and indulges outside muscle, arrange in described web that web indulges muscle 6 and web horizontal hoop 8, described web horizontal hoop 8 is arranged on the outside that muscle 6 indulged by described web, muscle is indulged on the edge of a wing of described web and intersection, the edge of a wing, it is public that muscle 6 indulged by web, in described web horizontal hoop 8, dark beam is set, described dark beam comprises dark beam and indulges muscle 4 and dark beam closed stirrup 5, four interior angle places of described dark beam closed stirrup 5 arrange that described dark beam indulges muscle 4, described dark beam is indulged muscle 4 and is be arranged in parallel with described web horizontal hoop 8, described dark beam is indulged muscle 4 end and is indulged muscle 6 with web and the web of intersection, the edge of a wing and be connected.
Further, dark depth of beam is identical with the height of described Vierendeel girder 3.
Further again, the reinforcement ratio that muscle 6 indulged by the one-sided web in the upper and lower edge of dark beam should not be less than 0.15%, and the diameter of web reinforcement 6 should not be less than 12mm, and is no less than 2.
Dark beam is indulged the web that muscle 4 is anchored at web and intersection, the edge of a wing and is indulged in muscle 6, and anchorage length is more than or equal to threshold value l
a; The diameter of dark beam closed stirrup is identical with web horizontal hoop, and spacing is less than or equal to 100mm, and the end of dark beam closed stirrup makes 135 ° of crotches, and crotch termination flat segments length is more than or equal to 10d, and d is the diameter of dark beam closed stirrup.
The two piece webs relative at least one group of Z-shaped center line both sides are indulged between muscle 6 and are arranged tension rib 7.One group of tension rib can be set as required, also can be many groups.
In Fig. 1,1 is Z-shaped Column border node core space, and 2 is Z-shaped post, and 3 is Vierendeel girder, and 7 is tension rib; With reference to Fig. 4,9 is Vierendeel girder longitudinal reinforcement (end muscle), and 11 is Vierendeel girder longitudinal reinforcement (top muscle), and 12 is Vierendeel girder node stirrup.
The dark beam Enhancement Method of the improvement Z-shaped Column border node torsional property of the present embodiment, construction process is as follows:
1) Z-shaped column web horizontal hoop 8 and edge of a wing horizontal hoop 10 below colligation soffit.The crotch of stirrup in Z-shaped post, should be arranged on post angle place, and need by vertical direction interlaced arrangement, and the vertical muscle of all stirrup Ying Yuzhu is vertical;
2) erection column template;
3) post concrete (anchorage point of enough beam muscle will be noted staying in top layer post limit) is built;
4) column template is removed;
5) installation frame beam bottom board, notes reserving protective layer thickness;
6) installation frame beam longitudinal reinforcement (end muscle 9);
7) colligation node beam stirrup 12;
8) the dark beam of the Z-shaped column web of colligation node indulges muscle 4 and dark beam closed stirrup 5, and dark beam indulges the inner side that muscle is anchored in core space both sides styletable longitudinal reinforcement, and anchorage length is more than or equal to threshold value l
adark beam closed stirrup should be made closed, its diameter is identical with the horizontal hoop of node, spacing is less than or equal to 100mm, the end of stirrup should make 135 ° of crotches, the curved arc diameter of HRB335 level, HRB400 level reinforcing bar is more than or equal to 4 times of bar diameter, and crotch termination flat segments length is more than or equal to 10d, and d is stirrup diameter;
9) colligation web horizontal hoop 8 and edge of a wing horizontal hoop 10;
10) colligation Vierendeel girder longitudinal reinforcement (top muscle 11);
11) node area template is installed, comprises side template and the floor bottom mould plate of Vierendeel girder;
12) node concrete is built, vibration compacting;
14) stripping, namely obtains the Z-shaped Column border node that dark beam strengthens.
In building course, a kind of dark beam Enhancement Method improving Z-shaped Column border node torsional property is substantially identical with the construction technology of common hetermorphiscal column node, only arranges dark beam at the position of steel concrete Z-shaped Column border node web.
Claims (5)
1. one kind is improved the dark beam Enhancement Method of Z-shaped Column border node torsional property, described Z-shaped Column border node comprises Z-shaped post and Vierendeel girder, described Z-shaped post comprises web and two edges of a wing, the described edge of a wing is positioned at the end of described web, arrange in the described edge of a wing that muscle and edge of a wing horizontal hoop are indulged in the edge of a wing, described edge of a wing horizontal hoop is arranged on the described edge of a wing and indulges outside muscle, arrange in described web that web indulges muscle and web horizontal hoop, described web horizontal hoop is arranged on the outside that muscle indulged by described web, muscle is indulged on the edge of a wing of described web and intersection, the edge of a wing, it is public that muscle indulged by web, it is characterized in that: in described web horizontal hoop, dark beam is set, described dark beam comprises dark beam and indulges muscle and dark beam closed stirrup, four interior angle places of described dark beam closed stirrup arrange that described dark beam indulges muscle, described dark beam indulges muscle and described web horizontal hoop be arranged in parallel, described dark beam is indulged muscle end and is indulged muscle with web with the web of intersection, the edge of a wing and be connected.
2. a kind of dark beam Enhancement Method improving Z-shaped Column border node torsional property as claimed in claim 1, is characterized in that: described dark depth of beam is identical with described framework depth of beam.
3. a kind of dark beam Enhancement Method improving Z-shaped Column border node torsional property as claimed in claim 1 or 2, it is characterized in that: the reinforcement ratio that muscle indulged by the one-sided web in the described upper and lower edge of dark beam should not be less than 0.15%, the diameter of web reinforcement should not be less than 12mm, and is no less than 2.
4. a kind of dark beam Enhancement Method improving Z-shaped Column border node torsional property as claimed in claim 1 or 2, is characterized in that: dark beam is indulged the web that muscle is anchored at web and intersection, the edge of a wing and indulged in muscle, and anchorage length is more than or equal to threshold value l
a; The diameter of dark beam closed stirrup is identical with web horizontal hoop, and spacing is less than or equal to 100mm, and the end of dark beam closed stirrup makes 135 ° of crotches, and crotch termination flat segments length is more than or equal to 10d, and d is the diameter of dark beam closed stirrup.
5. a kind of dark beam Enhancement Method improving Z-shaped Column border node torsional property as claimed in claim 1 or 2, is characterized in that: the two piece webs relative at least one group of Z-shaped center line both sides are indulged between muscle and arranged tension rib.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510156179.4A CN104775515B (en) | 2015-04-03 | 2015-04-03 | Hidden beam reinforcement method for improving torsional property of Z-shaped column nodes |
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| CN201510156179.4A CN104775515B (en) | 2015-04-03 | 2015-04-03 | Hidden beam reinforcement method for improving torsional property of Z-shaped column nodes |
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| CN104775515A true CN104775515A (en) | 2015-07-15 |
| CN104775515B CN104775515B (en) | 2017-04-19 |
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Cited By (2)
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| CN105908844A (en) * | 2016-04-15 | 2016-08-31 | 浙江工业大学 | Method for improving anti-seismic property of RC Z-shaped cross section column frame node |
| CN109057155A (en) * | 2017-01-03 | 2018-12-21 | 郑瑞平 | A kind of beams of concrete improving Torsion bearing capacity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908844A (en) * | 2016-04-15 | 2016-08-31 | 浙江工业大学 | Method for improving anti-seismic property of RC Z-shaped cross section column frame node |
| CN109057155A (en) * | 2017-01-03 | 2018-12-21 | 郑瑞平 | A kind of beams of concrete improving Torsion bearing capacity |
| CN109057155B (en) * | 2017-01-03 | 2020-08-07 | 安徽赛特新型建材有限公司 | Concrete beam capable of improving torsion-resistant bearing capacity |
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Effective date of registration: 20180920 Address after: 200080 758C room 7 block C, 137 Haining Road, Hongkou District, Shanghai. Patentee after: Shanghai elephant Construction Design Co., Ltd. Address before: 310014 Zhejiang University of Technology, 18 Zhaowang Road, Zhaohui six District, Hangzhou, Zhejiang Patentee before: Zhejiang University of Technology |