CN103924734A - Batten plate constraint type I-shaped steel bone confined concrete column and fabrication method thereof - Google Patents
Batten plate constraint type I-shaped steel bone confined concrete column and fabrication method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 97
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- 239000004567 concrete Substances 0.000 title claims abstract description 55
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- 210000000988 bone and bone Anatomy 0.000 title abstract description 10
- 238000000034 method Methods 0.000 title description 5
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 26
- 238000012423 maintenance Methods 0.000 claims description 4
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- 238000007689 inspection Methods 0.000 abstract 1
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- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012946 outsourcing Methods 0.000 description 3
- 230000000452 restraining effect Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
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- 238000013461 design Methods 0.000 description 2
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Abstract
Description
技术领域technical field
本发明涉及一种缀板约束型工字形钢骨约束混凝土柱及作法，主要应用于建筑结构中的抗震耗能领域。The invention relates to an I-shaped steel-frame-constrained concrete column and a method thereof, which are mainly used in the field of anti-seismic energy consumption in building structures.
背景技术Background technique
钢骨混凝土结构指在普通钢筋混凝土结构中配置钢骨的组合结构体系。在钢骨混凝土结构中，钢骨可分为实腹式和空腹式两种。实腹式钢骨混凝土构件具有较好的抗震性能，而空腹式钢骨混凝土构件的抗震性能与普通钢筋混凝土构件基本相同。因此，目前在抗震结构中多采用实腹式钢骨混凝土构件。实腹式钢骨可由钢板焊接拼制而成或直接采用轧制型钢。Steel-reinforced concrete structure refers to a composite structure system in which steel reinforcement is arranged in an ordinary reinforced concrete structure. In the steel reinforced concrete structure, the steel frame can be divided into two types: solid belly type and hollow type. The solid-web steel-reinforced concrete members have better seismic performance, while the seismic performance of the empty-web steel-reinforced concrete members is basically the same as that of ordinary reinforced concrete members. Therefore, at present, solid-web steel-reinforced concrete members are mostly used in earthquake-resistant structures. The solid-belly steel frame can be assembled by welding steel plates or directly using rolled steel.
研究表明，在配置一定构造要求柔性钢筋的情况下，钢骨混凝土结构中钢和混凝土能协同工作，直至达到极限承载力；钢骨混凝土结构综合了钢结构和钢筋混凝土结构二者的优点。与钢结构相比，它具有比较大的刚度和阻尼，有利于控制结构的变形；外包混凝土可以起到防止钢骨腐蚀和提高结构耐火性能的作用；外包混凝土也可以防止钢骨局部屈曲，使钢骨强度得到充分利用，节约钢材。同钢筋混凝土结构相比，钢骨提高了结构的承载力和延性，有利于减小构件截面尺寸，有利于结构抗震；钢骨混凝土中钢骨在混凝土浇灌前己形成可独立承载的结构体系，可承受施工活荷载和结构自重，无需设置临时支撑，在多高层建筑中不必等待混凝土达到一定强度后再施工，可缩短建设工期。Studies have shown that under the condition that a certain structure requires flexible steel bars, steel and concrete in steel reinforced concrete structures can work together until the ultimate bearing capacity is reached; steel reinforced concrete structures combine the advantages of steel structures and reinforced concrete structures. Compared with the steel structure, it has relatively large rigidity and damping, which is beneficial to control the deformation of the structure; the outsourcing concrete can prevent the corrosion of the steel frame and improve the fire resistance of the structure; the outsourcing concrete can also prevent the local buckling of the steel frame, making the The strength of the steel frame is fully utilized, saving steel. Compared with the reinforced concrete structure, the steel frame improves the bearing capacity and ductility of the structure, which is conducive to reducing the cross-sectional size of the component and is conducive to the earthquake resistance of the structure; in the steel reinforced concrete, the steel frame has formed a structural system that can independently carry the load before the concrete is poured. It can bear the construction live load and the self-weight of the structure without setting up temporary supports. In multi-story buildings, it is not necessary to wait for the concrete to reach a certain strength before construction, which can shorten the construction period.
在结构设计中，有时因建筑设计需要，柱的截面尺寸受到限制，当采用钢骨混凝土柱时，往往通过提高截面配钢率以提高其承载力及延性。如内置工字形钢骨型钢混凝土柱，除采用增加钢板厚度的方法提高配钢率外，还可以采用增大翼缘的方法。试验研究表明，在加载后期有较大变形时，由于内置带工字形钢骨型钢混凝土柱钢骨翼缘自由外伸长度较大，当宽厚比较大时，会发生一定的屈曲变形，钢骨对混凝土的约束能力下降，继而整个型钢混凝土柱承载力下降。因此，当翼缘宽厚比较小时，应采用有效的措施约束其屈曲变形，以提高整个混凝土柱的承载力及延性。In structural design, sometimes due to architectural design requirements, the section size of the column is limited. When steel reinforced concrete columns are used, the bearing capacity and ductility are often improved by increasing the steel ratio of the section. For example, if the built-in I-shaped steel frame steel concrete column, in addition to increasing the thickness of the steel plate to increase the steel ratio, the method of increasing the flange can also be used. Experimental research shows that when there is a large deformation in the later stage of loading, due to the large free extension length of the steel frame flange of the built-in steel concrete column with I-shaped steel frame, when the width-to-thickness ratio is large, a certain buckling deformation will occur, and the steel frame will not affect the load. The restraining capacity of concrete decreases, and then the bearing capacity of the entire steel concrete column decreases. Therefore, when the width-to-thickness ratio of the flange is small, effective measures should be taken to restrain its buckling deformation, so as to improve the bearing capacity and ductility of the entire concrete column.
发明内容Contents of the invention
本发明所要解决的技术问题是：提高内置工字形钢骨约束混凝土柱的承载力和延性，延缓或避免由于翼缘屈曲导致的构件刚度、承载力及延性的降低，充分发挥材料的性能，同时便于施工。为了解决这一问题，本发明提出了缀板约束型工字形钢骨约束混凝土柱及作法。The technical problem to be solved by the present invention is to improve the bearing capacity and ductility of the built-in I-shaped steel-reinforced concrete column, delay or avoid the reduction of component stiffness, bearing capacity and ductility caused by flange buckling, and give full play to the performance of the material, while It is convenient for construction. In order to solve this problem, the present invention proposes a panel-restricted type I-shaped steel frame-restricted concrete column and its method.
本发明采用的技术方案是：The technical scheme adopted in the present invention is:
该缀板约束型工字形钢骨约束混凝土柱，包括工字形钢骨1、约束缀板2、纵向钢筋3、复合箍筋4、混凝土5；约束缀板2分别与工字形钢骨1的两翼缘在翼缘外侧自由边处分段焊接连接，在钢骨外侧沿柱边布置纵向钢筋3，并配置复合箍筋4约束纵向钢筋3及内部混凝土5，复合箍筋4沿高度配置于上下相邻两约束缀板之间。The panel-constrained I-shaped steel frame-confined concrete column includes an I-shaped steel frame 1, a constraint panel 2, a longitudinal steel bar 3, a composite stirrup 4, and concrete 5; The edge is welded in sections at the outer free edge of the flange, the longitudinal reinforcement 3 is arranged along the column edge on the outer side of the steel frame, and the composite stirrup 4 is arranged to constrain the longitudinal reinforcement 3 and the internal concrete 5, and the composite stirrup 4 is arranged adjacent to each other up and down along the height Between two restraint panels.
所述的缀板约束型工字形钢骨约束混凝土柱为矩形或方形截面。The said panel-constrained I-shaped steel-reinforced concrete column has a rectangular or square cross-section.
所述的工字形钢骨1由高强钢板焊接而成或采用热轧工字钢，截面形状为工字形。The I-shaped steel frame 1 is welded by high-strength steel plates or hot-rolled I-shaped steel, and the cross-sectional shape is I-shaped.
所述的约束缀板2为高强矩形钢板，沿高均匀设置，截面厚度不小于工字形钢骨1翼缘钢板，截面高度与上下相邻两约束缀板间距之比小于1。The restraint panel 2 is a high-strength rectangular steel plate, uniformly arranged along the height, the section thickness is not less than the I-shaped steel frame 1 flange steel plate, and the ratio of the section height to the distance between the upper and lower adjacent restraint panels is less than 1.
所述的纵向钢筋3为高强钢筋，沿柱边均匀配置。The longitudinal steel bar 3 is a high-strength steel bar, which is evenly arranged along the column edge.
所述的复合箍筋4为高强钢筋，由矩形双肢箍筋与六边形双肢箍筋复合而成，柱脚部位减小间距加密布置，其他部位均匀布置。The composite stirrup 4 is a high-strength steel bar, which is composed of a rectangular double-leg stirrup and a hexagonal double-leg stirrup. The column foot parts are arranged with reduced spacing and dense arrangement, and other parts are evenly arranged.
所述的混凝土5为高强混凝土，混凝土强度等级大于C50。The concrete 5 is high-strength concrete, and the concrete strength grade is greater than C50.
根据本发明的技术方案，该缀板约束型工字形钢骨约束混凝土柱，其制作步骤如下：According to the technical solution of the present invention, the manufacturing steps of the panel-constrained I-shaped steel frame-constrained concrete column are as follows:
1）工厂预制工字形钢骨1；1) Factory prefabricated I-shaped steel frame 1;
2）定位约束缀板2并与工字形钢骨1的翼缘焊接；2) Position the restraint plate 2 and weld it to the flange of the I-shaped steel frame 1;
3）将工厂预制焊接好的钢骨构件运至现场并定位后，绑扎纵向钢筋3与复合箍筋4；3) After the prefabricated and welded steel frame members are transported to the site and positioned, the longitudinal reinforcement 3 and the composite stirrup 4 are bound;
4）支模板并灌注混凝土5，进行养护；4) Support the formwork and pour concrete 5 for maintenance;
5）当混凝土达到强度后，形成缀板约束型工字形钢骨约束混凝土柱。5) When the concrete reaches its strength, form a plate-bound I-shaped steel frame-bound concrete column.
本发明可以取得如下有益效果：The present invention can obtain following beneficial effect:
本发明采用约束缀板将工字形钢骨的翼缘部分进行了有效的拉结，减小了翼缘的自有外伸长度，约束了翼缘的屈曲变形，同时约束缀板的存在使得钢骨对其内部混凝土的约束能力增强，发挥了类似于钢管混凝土柱中钢管的作用；纵向分布钢筋与复合箍筋对其内部混凝土同样具有较好的约束能力，与钢骨双重约束内部混凝土，而复合箍筋布置于上下相邻约束缀板之间，对约束缀板间隙内混凝土有较好的约束作用；约束缀板间隔布置，钢骨内部与外部混凝土相互串通，保证了混凝土的浇筑质量；综上几方面因素，本发明中的混凝土具有较高的强度和良好的弹塑性变形能力，形成的钢骨混凝土柱具有较高的承载力、延性及耗能能力。In the present invention, the flange part of the I-shaped steel frame is effectively tied by using the restraint plate, which reduces the self-extension length of the flange and restrains the buckling deformation of the flange. At the same time, the existence of the restraint plate makes the steel The restraining ability of the bone to its internal concrete is enhanced, which plays a role similar to that of the steel pipe in the steel tube concrete column; the longitudinally distributed steel bars and composite stirrups also have a good restraining ability on the internal concrete, and double restrain the internal concrete with the steel frame, while The composite stirrups are arranged between the upper and lower adjacent restraint panels, which have a better restraint effect on the concrete in the gap between the restraint panels; the restraint panels are arranged at intervals, and the inner and outer concrete of the steel frame collude with each other to ensure the quality of concrete pouring; Based on the above factors, the concrete in the present invention has high strength and good elastic-plastic deformation capacity, and the formed steel reinforced concrete column has high bearing capacity, ductility and energy dissipation capacity.
本发明采用外包混凝土的形式，相比于钢管混凝土柱具有良好的耐火、耐腐蚀能力，有利于降低使用过程中的维护陈本。The invention adopts the form of outsourcing concrete, which has good fire resistance and corrosion resistance compared with the steel pipe concrete column, and is beneficial to reduce maintenance costs during use.
附图说明Description of drawings
图1是缀板约束型工字形钢骨约束混凝土柱立体图；Fig. 1 is a three-dimensional view of a plate-constrained I-shaped steel-reinforced concrete column;
图2是缀板约束型工字形钢骨约束混凝土柱截面图；Fig. 2 is a cross-sectional view of an I-shaped steel-reinforced concrete column constrained by a panel;
其中：1-工字形钢骨，2-约束缀板，3-纵向钢筋，4-复合箍筋，5-混凝土。Among them: 1-I-shaped steel frame, 2-constraint plate, 3-longitudinal steel bar, 4-composite stirrup, 5-concrete.
具体实施方式Detailed ways
下面结合具体实例对本发明做进一步说明：Below in conjunction with specific example the present invention will be further described:
实施实例Implementation example
如图1、图2所示，该缀板约束型工字形钢骨约束混凝土柱，包括工字形钢骨1、约束缀板2、纵向钢筋3、复合箍筋4、混凝土5；其是在内置工字形钢骨混凝土柱基础上增设约束缀板形成。As shown in Fig. 1 and Fig. 2, the slab-constrained I-shaped steel frame-confined concrete column includes I-shaped steel frame 1, constrained slab 2, longitudinal steel bar 3, composite stirrup 4, and concrete 5; The I-shaped steel-reinforced concrete column foundation is formed by adding restraint panels.
根据本发明的技术方案，该缀板约束型工字形钢骨约束混凝土柱，其制作步骤如下：According to the technical solution of the present invention, the manufacturing steps of the panel-constrained I-shaped steel frame-constrained concrete column are as follows:
1）工厂预制焊接工字形钢骨1；1) Factory prefabricated welded I-shaped steel frame 1;
2）定位约束缀板2并与工字形钢骨1的翼缘焊接；2) Position the restraint plate 2 and weld it to the flange of the I-shaped steel frame 1;
3）将工厂预制焊接好的钢骨构件运至现场并定位后，绑扎纵向钢筋3与复合箍筋4；3) After the prefabricated and welded steel frame members are transported to the site and positioned, the longitudinal reinforcement 3 and the composite stirrup 4 are bound;
4）支模板并灌注混凝土5，进行养护；4) Support the formwork and pour concrete 5 for maintenance;
5）当混凝土达到强度后，形成缀板约束型工字形钢骨约束混凝土柱。5) When the concrete reaches its strength, form a plate-bound I-shaped steel frame-bound concrete column.
以上是本发明的典型实施例，本发明的实施不限于此。The above are typical embodiments of the present invention, and the practice of the present invention is not limited thereto.
Claims (8)
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| CN109469260A (en) * | 2019-01-02 | 2019-03-15 | 中国建筑第八工程局有限公司 | Steel reinforced concrete combines flat column and preparation method thereof |
| CN109972855A (en) * | 2019-04-26 | 2019-07-05 | 贵州中建建筑科研设计院有限公司 | A kind of reconstruction structure of old building brick column |
| CN113152775A (en) * | 2021-04-06 | 2021-07-23 | 华南理工大学 | ECC-reinforced steel thin-wall structure and preparation method thereof |
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Application publication date: 20140716 |