CN104100042A - Steel skeleton-steel pipe fiber concrete T-shaped section composite column - Google Patents
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- 239000004567 concrete Substances 0.000 title claims abstract description 37
- 239000000835 fiber Substances 0.000 title abstract description 18
- 239000002131 composite material Substances 0.000 title abstract description 12
- 230000002787 reinforcement Effects 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 4
- 239000011210 fiber-reinforced concrete Substances 0.000 abstract description 10
- 239000011372 high-strength concrete Substances 0.000 abstract description 7
- 239000002657 fibrous material Substances 0.000 abstract description 3
- 230000000452 restraining effect Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 210000003414 extremity Anatomy 0.000 description 9
- 239000011150 reinforced concrete Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
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Abstract
本发明涉及一种钢骨-钢管纤维混凝土T形截面组合柱。钢骨-钢管纤维混凝土T形截面组合柱由钢骨、钢管、钢筋和纤维混凝土构成。钢骨位于T形柱的肢上,有利于改善T形柱肢部的受力性能;钢管位于柱肢部相交的核心部位,有效约束了高强混凝土的脆性变形,促进了高强混凝土在T形柱中的应用;纤维混凝土位于钢管内外,充分利用了纤维材料的特性,改善了高强混凝土的脆性、抗拉、抗剪和抗弯强度较低等弊端;钢筋骨架对纤维混凝土起到了约束作用,增强了柱子的承载能力。本发明是高层和大跨度建筑物中框架结构的主要构件,具有承载力高,刚度大、重量轻,塑性、韧性好,抗冲击和抗疲劳性能好,抗震性能佳,具有良好的耐久性等特点。
The invention relates to a steel frame-steel tube fiber concrete T-shaped section composite column. The steel frame-steel tube fiber reinforced concrete T-shaped section composite column is composed of steel frame, steel tube, steel bar and fiber concrete. The steel frame is located on the limbs of the T-shaped column, which is conducive to improving the mechanical performance of the limbs of the T-shaped column; the steel pipe is located at the core part where the limbs of the column intersect, which effectively restrains the brittle deformation of high-strength concrete and promotes the high-strength concrete in the T-shaped column. The fiber concrete is located inside and outside the steel pipe, making full use of the characteristics of fiber materials, improving the brittleness of high-strength concrete, low tensile, shear and flexural strength and other disadvantages; the steel skeleton plays a restraining role on the fiber concrete, strengthening the bearing capacity of the column. The invention is the main component of the frame structure in high-rise and long-span buildings, which has high bearing capacity, high rigidity, light weight, good plasticity and toughness, good impact resistance and fatigue resistance, good earthquake resistance, and good durability, etc. features.
Description
技术领域 technical field
本发明涉及了一种混凝土构件,特别是涉及一种用于土木工程中的纤维混 The present invention relates to a concrete member, in particular to a fiber-concrete used in civil engineering
凝土T形柱,是一种新型的钢骨-钢管纤维混凝土T形截面组合柱。 Concrete T-shaped column is a new type of steel-steel fiber reinforced concrete T-shaped section composite column.
背景技术 Background technique
当前社会,随着经济的发展和居民生活水平的提升,人们对住宅的要求越来越高,尤其是对房屋结构和居室布局越来越重视。由于普通混凝土柱的截面尺寸往往大于墙体的厚度,影响了室内空间的使用,难以满足建筑美观的要求。为了解决这一问题,出现了钢筋混凝土T形柱的结构形式。钢筋混凝土T形柱结构体系的优点比较突出,国内外的学者、专家对此进行了广泛、深入的研究。钢筋混凝土L形柱的理论体系已基本形成,比如天津、沈阳、广东、山西等省市已经完成了地方规程的编写,并指导于工程实践,建筑面积达数千万平方米。 In the current society, with the development of the economy and the improvement of residents' living standards, people have higher and higher requirements for housing, especially for housing structure and living room layout. Because the cross-sectional size of ordinary concrete columns is often larger than the thickness of the wall, it affects the use of indoor space, and it is difficult to meet the requirements of architectural beauty. In order to solve this problem, the structural form of reinforced concrete T-shaped columns appeared. The advantages of the reinforced concrete T-shaped column structure system are more prominent, and scholars and experts at home and abroad have conducted extensive and in-depth research on it. The theoretical system of reinforced concrete L-shaped columns has been basically formed. For example, Tianjin, Shenyang, Guangdong, Shanxi and other provinces and cities have completed the compilation of local regulations and guided them in engineering practice. The construction area reaches tens of millions of square meters. the
但是,随着超高层和大跨度建筑结构的不断发展,纯粹的钢筋混凝土T形柱的缺点越来越突出。如受到轴压比的限制,较大荷载下如果仍然采用普通钢筋混凝土T形柱,将会导致柱的截面尺寸非常大;T形柱由于多肢的存在,其剪力中心与截面形心往往不重合,在受力状态下,各肢产生翘曲正应力和剪应力;由于剪应力,使柱肢混凝土先于普通矩形柱出现裂缝,即产生腹剪裂缝,导致异形柱脆性明显,使异形柱的变形能力比普通矩形柱降低,抗震性能并不理想。 However, with the continuous development of super high-rise and long-span building structures, the disadvantages of pure reinforced concrete T-shaped columns have become more and more prominent. If limited by the axial compression ratio, if ordinary reinforced concrete T-shaped columns are still used under heavy loads, the section size of the columns will be very large; due to the existence of multiple limbs, the shear center and section centroid of T-shaped columns often In the state of stress, each limb produces warping normal stress and shear stress; due to the shear stress, the concrete of the column limbs cracks before the ordinary rectangular column, that is, abdominal shear cracks occur, resulting in obvious brittleness of the special-shaped column, making the special-shaped column The deformation capacity of the column is lower than that of ordinary rectangular columns, and the seismic performance is not ideal. the
同时,多年来,人们对钢纤维约束混凝土裂缝开展的研究,已经取得了重大的进展。提出了钢纤维混凝土开裂强度是由对拉伸应力起有效作用的钢纤维平均间距所决定的结论(纤维间距理论),从而开始了这种新型复合材料的实用开发阶段。近年来,钢纤维在国内外得到迅速发展。它克服了混凝土抗拉强度低、极限延伸率小、性脆等缺点,具有优良的抗拉、抗弯、抗剪、阻裂、耐疲劳、高韧性等性能,己在建筑、路桥、水工等工程领域得到广泛应用。 Meanwhile, over the years, research on cracks in steel fiber-confined concrete has made significant progress. The conclusion that the cracking strength of steel fiber reinforced concrete is determined by the average spacing of steel fibers that have an effective effect on tensile stress (fiber spacing theory) was proposed, thus starting the practical development stage of this new type of composite material. In recent years, steel fiber has developed rapidly at home and abroad. It overcomes the shortcomings of concrete such as low tensile strength, low ultimate elongation, and brittleness. It has excellent tensile, bending, shearing, crack resistance, fatigue resistance, and high toughness properties. It has been used in construction, roads and bridges, and hydraulic engineering It has been widely used in engineering fields. the
因此,本文在上述背景下,拟利用纤维的特性,掺入混凝土中,从而改善混凝土材料自身的脆性、抗拉、抗剪和抗弯强度较低等缺点,以及与钢骨、钢管之间的粘结性能差的缺点,作者通过分析前期的研究成果,提出了一种新型的钢骨-钢管纤维混凝土T形截面组合柱,该种组合柱综合了钢筋混凝土T形柱、钢管混凝土柱、钢骨混凝土柱、纤维混凝土柱的优点,减轻了资源压力和环境负担,大大的拓宽了混凝土T形柱的应用和发展空间,具有十分重要的研究意义。 Therefore, under the above-mentioned background, this paper intends to use the characteristics of fibers to be mixed into concrete, so as to improve the shortcomings of concrete materials such as brittleness, low tensile, shear and flexural strength, as well as the relationship between steel frames and steel pipes. Due to the shortcomings of poor bonding performance, the author proposed a new type of steel-reinforced steel tube fiber reinforced concrete T-shaped section composite column by analyzing the previous research results. This composite column combines reinforced concrete T-shaped columns, steel tube concrete columns, The advantages of bone concrete columns and fiber reinforced concrete columns reduce resource pressure and environmental burden, and greatly broaden the application and development space of concrete T-shaped columns, which has very important research significance. the
发明内容 Contents of the invention
本发明的目的是提供一种钢骨-钢管纤维混凝土T形截面组合柱,这种新型组合柱提高了普通钢筋混凝土T形柱的受力性能,改善了高强混凝土的脆性、抗拉、抗剪和抗弯强度较低等弊端。本发明通过以下技术方案实现:钢骨-钢管纤维混凝土T形截面组合柱的T形钢骨由钢板焊接而成,位于T形柱的肢上,钢管位于柱的中心,试件制作时先将钢骨和钢管通过焊接或螺栓连接固定,然后绑扎钢筋骨架,支模,浇筑纤维混凝土。位于T形柱肢上的钢骨改善了肢部的受力性能和变形性能;位于核心处的钢管提高了T形柱的承载能力和延性;充分利用了纤维材料的特性,改善了高强混凝土脆性较低的弊端。 The purpose of the present invention is to provide a steel frame-steel fiber reinforced concrete T-shaped section composite column. This new type of composite column improves the mechanical performance of ordinary reinforced concrete T-shaped columns, and improves the brittleness, tensile resistance and shear resistance of high-strength concrete. And disadvantages such as low bending strength. The present invention is realized through the following technical solutions: the T-shaped steel frame of the steel frame-steel tube fiber reinforced concrete T-shaped cross-section composite column is welded by steel plates, located on the limbs of the T-shaped column, and the steel pipe is located at the center of the column. The steel frame and steel pipe are fixed by welding or bolting, then the steel frame is bound, the formwork is set up, and fiber concrete is poured. The steel frame on the T-shaped column improves the mechanical performance and deformation performance of the limb; the steel pipe at the core improves the bearing capacity and ductility of the T-shaped column; the characteristics of fiber materials are fully utilized to improve the brittleness of high-strength concrete Lower cons. the
本发明的优点与效果是: Advantage and effect of the present invention are:
1.充分利用纤维材料的特性,改善高强混凝土的脆性、抗拉、抗剪和抗弯强度较低等弊端; 1. Make full use of the characteristics of fiber materials to improve the disadvantages of high-strength concrete such as brittleness, low tensile, shear and flexural strength;
2.钢管位于纵横方向混凝土交叉部位的内部,受到外部混凝土的保护,具有良好的耐火、耐腐蚀性能; 2. The steel pipe is located inside the intersection of concrete in the vertical and horizontal directions, protected by the external concrete, and has good fire resistance and corrosion resistance;
3.钢管内混凝土处于三相受压状态,提高了柱子的极限承载力,为高强混凝土的应用提空了空间; 3. The concrete in the steel pipe is in a three-phase compression state, which improves the ultimate bearing capacity of the column and provides space for the application of high-strength concrete;
4.钢骨位于T形柱的肢部,改善了肢部的受力性能; 4. The steel frame is located at the limb of the T-shaped column, which improves the mechanical performance of the limb;
5.可以先施工钢骨、钢管,将钢骨、钢管在底部焊接或螺栓连接固定,然后绑扎纵筋和箍筋,形成骨架后浇注纤维混凝土,从而形成叠合柱; 5. The steel frame and steel pipe can be constructed first, and the steel frame and steel pipe can be welded or bolted at the bottom, and then the longitudinal bars and stirrups can be tied to form a skeleton and then pour fiber concrete to form a laminated column;
6.由于钢骨、钢管的存在改善了柱的延性,提高了柱的极限承载力,有利于地震区抗震设计; 6. Due to the presence of steel frames and steel pipes, the ductility of the column is improved, and the ultimate bearing capacity of the column is increased, which is beneficial to the seismic design of the earthquake zone;
7.拓宽了混凝土T形柱的应用和发展空间,美化了建筑外观。 7. It widens the application and development space of concrete T-shaped columns, and beautifies the appearance of the building.
附图说明 Description of drawings
图1是钢骨-钢管纤维混凝土T形截面组合柱的示意图。 Fig. 1 is a schematic diagram of a steel frame-steel tube fiber reinforced concrete T-shaped section composite column. the
由钢骨、钢管、纤维混凝土和钢筋骨架组成,其中纤维混凝土位于钢管内、外,钢骨位于T形柱的肢上,钢管位于T形柱的中心,钢筋骨架处在T形柱的四周。图中:1为纵向钢筋,2为纤维混凝土,3为钢管,4为箍筋,5为钢骨。 It is composed of steel skeleton, steel pipe, fiber concrete and steel skeleton, wherein the fiber concrete is located inside and outside the steel pipe, the steel skeleton is located on the limb of the T-shaped column, the steel pipe is located in the center of the T-shaped column, and the steel skeleton is located around the T-shaped column. Among the figure: 1 is longitudinal reinforcement, 2 is fiber concrete, 3 is steel pipe, 4 is stirrup, 5 is steel frame. the
具体实施方式 Detailed ways
钢骨-钢管纤维混凝土T形截面组合柱,:由钢骨、钢管、钢筋骨架和纤维混凝土组成,钢骨由钢板焊接而成;钢管内有混凝土,箍筋呈T形,内包裹混凝土,钢骨位于T形柱的肢上,钢管位于T形柱的核心,混凝土采用纤维混凝土。T形柱的肢上是指矩形部分的边端,钢骨呈T形布置。T形柱的核心是指T形柱角部的中心。具体工艺如下: Steel frame-steel fiber reinforced concrete T-section composite column: composed of steel frame, steel pipe, steel frame and fiber concrete, steel frame is welded by steel plate; The bones are on the limbs of the T-columns, the steel tubes are in the core of the T-columns, and the concrete is fiber-reinforced concrete. The upper limb of the T-shaped column refers to the side end of the rectangular part, and the steel frame is arranged in a T shape. The core of the T-pillar refers to the center of the corner of the T-pillar. The specific process is as follows:
1. 按照规定将钢板焊接成钢骨; 1. Weld the steel plate into a steel frame according to the regulations;
2. 将钢骨和钢管焊接或螺栓连接固定,并保持垂直或一定角度; 2. Fix the steel frame and steel pipe by welding or bolting, and keep it vertical or at a certain angle;
3. 绑扎钢筋骨架; 3. Binding steel skeleton;
4. 在钢筋骨架外侧支模板; 4. Support formwork on the outside of the steel skeleton;
5. 将一定比例、一定尺寸的纤维与水泥等充分搅拌,形成纤维混凝土; 5. Fully mix a certain proportion and a certain size of fiber with cement to form fiber concrete;
6. 浇注纤维混凝土; 6. Pouring fiber concrete;
7. 定期养护; 7. Regular maintenance;
8. 到达规定养护日期后,拆模成型。 8. After the specified maintenance date is reached, the mold is removed and formed.
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CN104314234A (en) * | 2014-10-29 | 2015-01-28 | 沈阳建筑大学 | Steel bone-steel tube gangue concrete combination post with T-shaped section |
CN104405081A (en) * | 2014-10-30 | 2015-03-11 | 沈阳建筑大学 | Steel skeleton-steel tube recycled concrete T-shaped section compound column |
CN105064612A (en) * | 2015-08-27 | 2015-11-18 | 中冶建筑研究总院有限公司 | Steel-concrete combined special-shaped column with thermal insulating and load bearing integrated and preparation method thereof |
CN105604247A (en) * | 2015-12-21 | 2016-05-25 | 天津大学 | Steel-concrete combined T-shaped column |
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