CN104712099B - The built-in concrete filled steel tube combined huge size post of odd-shaped cross section multi-cavity steel tube and the practice - Google Patents
The built-in concrete filled steel tube combined huge size post of odd-shaped cross section multi-cavity steel tube and the practice Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 169
- 239000010959 steel Substances 0.000 title claims abstract description 169
- 239000004567 concrete Substances 0.000 title claims abstract description 75
- 239000011372 high-strength concrete Substances 0.000 claims abstract description 30
- 239000003351 stiffener Substances 0.000 claims abstract description 24
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- 208000002925 dental caries Diseases 0.000 claims 1
- 239000004574 high-performance concrete Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 20
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- 230000036571 hydration Effects 0.000 abstract description 6
- 238000006703 hydration reaction Methods 0.000 abstract description 6
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Abstract
一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱及其施工方法，属于建筑领域。钢管截面形式可以为三角形，四边形，五边形，六边形等等，通过不同截面形式的组合或单独使用，形成异形截面多腔钢管内置圆钢管混凝土组合巨型柱；横隔板与方钢管焊接；纵向加劲肋与方钢管、横隔板焊接；圆钢管与纵向加劲肋、横隔板焊接；钢管内浇筑高强混凝土，圆钢管内混凝土强度高于方钢管内混凝土强度，圆钢管内可以浇筑再生混凝土。本发明适用于异形截面多腔钢管混凝土巨型柱提高轴压、偏压承载力，对于改善异形截面多腔钢管混凝土巨型柱的应力集中问题以及混凝土水化热问题有重要意义。本方法简便，经济有效，有利于在建筑结构设计中推广应用。
The invention relates to a multi-cavity steel pipe with special-shaped cross-section and a built-in circular steel pipe concrete composite giant column and a construction method thereof, which belong to the construction field. The section form of the steel pipe can be triangular, quadrilateral, pentagonal, hexagonal, etc., through the combination of different section forms or used alone, to form a multi-cavity steel pipe with a built-in circular steel pipe concrete composite giant column; the diaphragm is welded to the square steel pipe ; Longitudinal stiffeners are welded with square steel pipes and diaphragms; round steel pipes are welded with longitudinal stiffeners and diaphragms; high-strength concrete is poured in steel pipes, the strength of concrete in round steel pipes is higher than that in square steel pipes, and recycling can be poured in round steel pipes concrete. The invention is applicable to the multi-cavity concrete-filled steel pipe giant columns with special-shaped cross-sections to improve the bearing capacity of axial pressure and bias pressure, and has great significance for improving the stress concentration problem of the multi-cavity concrete-filled steel pipe giant columns with special-shaped cross-sections and the problem of concrete hydration heat. The method is simple, economical and effective, and is conducive to popularization and application in building structure design.
Description
技术领域：Technical field:
本发明属于一种异形截面钢管混凝土组合巨型柱，具体涉及一种在异形截面多腔钢管混凝土组合巨型柱内添加圆钢管及其施工方法。The invention belongs to a special-shaped cross-section steel pipe concrete composite giant column, in particular to a method for adding round steel pipes to the special-shaped cross-section multi-cavity steel pipe concrete composite giant column and the construction method thereof.
背景技术：Background technique:
钢管混凝土柱与传统混凝土柱相比，承载力高，在保持截面形式相同的情况下，钢管混凝土柱的承载力明显高于普通钢筋混凝土柱。方钢管与圆钢管对混凝土具有约束性能，能够有效克服高强混凝土的脆性，同时保持一定的延性。其中圆钢管对混凝土的约束性能远高于方钢管。圆钢管内可以浇筑强度更高的混凝土。工程中柱的设计多采用单腔截面形式，但现在巨型柱应用越来越广泛，单腔截面形式不能满足承载力要求。多腔巨型柱应用逐渐增多，尤其是异形截面巨型柱截面形式。但异形截面巨型柱截面形式复杂，易出现应力集中区域。在这种情况下，结构承载力降低，甚至低于原正常使用设计值，例如在进行某天津117高层建筑和北京Z15大厦的实验模拟时，在试件的角部出现较严重的破坏。巨型柱由于体积较大，浇筑混凝土时产生水化热较多，易产生温度裂缝。在这些情况下，对人们的生命和财产安全形成巨大的隐患。Compared with traditional concrete columns, steel-filled concrete columns have higher bearing capacity. Under the condition of keeping the same cross-sectional form, the bearing capacity of steel-filled concrete columns is significantly higher than that of ordinary reinforced concrete columns. Square steel pipes and round steel pipes have restraint properties on concrete, which can effectively overcome the brittleness of high-strength concrete while maintaining a certain degree of ductility. Among them, the confinement performance of circular steel pipes on concrete is much higher than that of square steel pipes. Concrete with higher strength can be poured in the round steel pipe. The design of columns in engineering mostly adopts the single-cavity cross-section form, but now the giant columns are more and more widely used, and the single-cavity cross-section form cannot meet the bearing capacity requirements. The application of multi-cavity giant columns is gradually increasing, especially the section form of special-shaped cross-section giant columns. However, the section form of the giant column with special-shaped cross-section is complicated, and the stress concentration area is prone to appear. In this case, the structural bearing capacity is reduced, even lower than the original design value for normal use. For example, during the experimental simulation of a Tianjin 117 high-rise building and Beijing Z15 building, serious damage occurred at the corner of the specimen. Due to the large volume of giant columns, more heat of hydration is generated when pouring concrete, which is prone to temperature cracks. Under these circumstances, huge hidden danger is formed to people's life and property safety.
因此，研发一种经济实用，造价低廉，施工简便的异形截面多腔钢管混凝土组合巨型柱结构形式对于提高异形截面方钢管混凝土巨型柱承载力具有十分重要的实践意义和社会经济价值。Therefore, the development of an economical, practical, low-cost, and easy-to-construct multi-cavity concrete-filled steel tube composite mega-column structure with special-shaped cross-section has very important practical significance and socio-economic value for improving the bearing capacity of special-shaped square-section concrete-filled steel tube giant columns.
发明内容：Invention content:
本发明的目的在于提供一种施工简单、造价低廉的异形截面多腔钢管混凝土组合巨型柱形式，以期解决异形截面多腔钢管混凝土组合巨型柱因为应力集中问题导致的局部破坏问题，同时缓解大体积混凝土水化热引起的混凝土温度裂缝。The purpose of the present invention is to provide a multi-cavity composite giant column with special-shaped cross-section and multi-cavity concrete-filled steel pipe with simple construction and low cost, in order to solve the problem of local damage caused by the stress concentration of the special-shaped cross-section multi-chamber concrete-filled steel composite giant column, and at the same time alleviate the large volume Concrete temperature cracks caused by concrete hydration heat.
为实现上述目的，本发明的技术方案如下：To achieve the above object, the technical scheme of the present invention is as follows:
一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱，基本腔体包括钢管1、横隔板2、纵向加劲肋3、圆钢管4、普通高强混凝土5、高性能高强混凝土6；钢管1截面形式可以为三角形，四边形，五边形，六边形，内置圆钢管4，内部焊接有横隔板2和纵向加劲肋3，钢管1内浇筑普通高强混凝土5，圆钢管4内浇筑高性能高强混凝土6。通过不同截面形式之间的单独应用或组合应用，这就形成了一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱。A multi-cavity steel tube with special-shaped cross-section built-in circular steel tube concrete composite giant column, the basic cavity includes steel tube 1, transverse diaphragm 2, longitudinal stiffener 3, round steel tube 4, ordinary high-strength concrete 5, high-performance high-strength concrete 6; steel tube 1 section The form can be triangular, quadrangular, pentagonal, hexagonal, built-in round steel pipe 4, internally welded with transverse diaphragm 2 and longitudinal stiffener 3, ordinary high-strength concrete 5 is poured inside steel pipe 1, and high-performance high-strength concrete is poured inside round steel pipe 4 Concrete6. Through the separate application or combined application of different cross-sectional forms, this forms a composite mega-column with special-shaped cross-section multi-cavity steel pipes and circular steel pipe concrete composites.
所述的一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱，其特征在于：The described multi-cavity steel pipe with special-shaped cross-section and built-in circular steel pipe concrete composite giant column is characterized in that:
所述钢管1内焊接纵向加劲肋3，横隔板2，将普通高强混凝土5分为多个小体积混凝土，能够有效缓解大体积混凝土水化热引起的温度裂缝，保证混凝土强度。钢管1对混凝土形成约束作用，能够有效克服高强混凝土的脆性，钢管1内可以浇筑高强混凝土。The steel pipe 1 is welded with longitudinal stiffeners 3 and diaphragms 2 to divide the ordinary high-strength concrete 5 into multiple small-volume concretes, which can effectively alleviate the temperature cracks caused by the hydration heat of large-volume concrete and ensure the strength of the concrete. The steel pipe 1 forms a restraining effect on concrete, which can effectively overcome the brittleness of high-strength concrete, and high-strength concrete can be poured in the steel pipe 1 .
所述的一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱，其特征在于：所述横隔板2与钢管1焊接，提高方钢管整体稳定性。横隔板2上留有孔洞，以便能够浇筑，振捣混凝土。The said multi-cavity steel pipe with special-shaped cross-section built-in circular steel pipe concrete composite giant column is characterized in that the diaphragm 2 is welded to the steel pipe 1 to improve the overall stability of the square steel pipe. Holes are left on the diaphragm 2 so that the concrete can be poured and vibrated.
所述的一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱，其特征在于：所述纵向加劲肋3一侧与钢管1钢板中心焊接，一侧与圆钢管4焊接，上下两端与横隔板2焊接，增强钢管1与圆钢管4的稳定性。纵向加劲肋3上留有孔洞，使圆钢管4周围腔体之间混凝土相互连通。The said multi-chamber multi-cavity steel pipe built-in circular steel pipe concrete composite giant column is characterized in that: one side of the longitudinal stiffener 3 is welded to the center of the steel pipe 1 steel plate, one side is welded to the round steel pipe 4, and the upper and lower ends are connected to the horizontal The clapboard 2 is welded to enhance the stability of the steel pipe 1 and the round steel pipe 4 . Holes are left on the longitudinal stiffeners 3 to make the concrete between the cavities around the round steel pipe 4 communicate with each other.
所述的一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱，其特征在于：所述圆钢管4与横隔板2、纵向加劲肋3焊接，提高圆钢管整体稳定性。圆钢管对混凝土约束能力远远大于方钢管，圆钢管内可以浇筑比外部强度更高的混凝土，有效提高混凝土柱的轴压和偏压承载力。The above-mentioned multi-cavity steel pipe with special-shaped cross-section built-in circular steel pipe concrete composite giant column is characterized in that: the circular steel pipe 4 is welded to the diaphragm 2 and the longitudinal stiffener 3 to improve the overall stability of the circular steel pipe. The confinement capacity of circular steel pipes on concrete is far greater than that of square steel pipes. Concrete with higher strength than the outside can be poured inside circular steel pipes, effectively improving the axial and eccentric load bearing capacity of concrete columns.
所述的一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱，其特征在于：所述钢管1内浇筑普通高强混凝土5强度不低于C50，圆钢管4内浇筑高性能高强混凝土6强度不低于C60。The said multi-cavity steel tube with special-shaped cross-section built-in circular steel tube concrete composite giant column is characterized in that: the steel tube 1 is poured with ordinary high-strength concrete 5 with a strength not lower than C50, and the circular steel tube 4 with high-performance high-strength concrete 6 with a strength of less than lower than C60.
所述的一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱的施工方法，其特征在于包括以下要求：The construction method of the multi-cavity steel pipe with special-shaped cross-section and built-in circular steel pipe concrete composite giant column is characterized in that it includes the following requirements:
1)不同基本腔体钢管1焊接连接；1) The steel pipes 1 with different basic cavities are connected by welding;
2)横隔板2与钢管1焊接；2) The diaphragm 2 is welded to the steel pipe 1;
3)圆钢管4与横隔板2焊接；3) The round steel pipe 4 is welded to the diaphragm 2;
4)纵向加劲肋3焊接于钢管1边板中点处，并与横隔板2，圆钢管4焊接；4) The longitudinal stiffener 3 is welded at the midpoint of the side plate of the steel pipe 1, and welded with the diaphragm 2 and the round steel pipe 4;
5)钢管1内浇筑普通高强混凝土5，圆钢管4内浇筑高性能高强混凝土6，圆钢管内混凝土强度高于方钢管内混凝土强度。5) Ordinary high-strength concrete 5 is poured in the steel pipe 1, and high-performance high-strength concrete 6 is poured in the round steel pipe 4, and the strength of the concrete in the round steel pipe is higher than that in the square steel pipe.
本发明可以获得以下益果：The present invention can obtain following beneficial result:
(1)钢管，纵向加劲肋，横隔板，圆钢管之间相互焊接，有效提高了方钢管，以及圆钢管的稳定性。在纵向加劲肋上开孔，使相邻腔体之间混凝土相互贯通，形成混凝土内置钢板结构，有效提高混凝土承载力；(1) Steel pipes, longitudinal stiffeners, diaphragms, and round steel pipes are welded to each other, which effectively improves the stability of square steel pipes and round steel pipes. Holes are opened on the longitudinal stiffeners to allow the concrete between adjacent cavities to communicate with each other, forming a steel plate structure built into the concrete, which effectively improves the bearing capacity of the concrete;
(2)圆钢管对混凝土约束性能远远大于方钢管，可以有效克服高强混凝土的脆性。所以，圆钢管内可以浇筑强度更高的混凝土，或者使用高强再生混凝土，达到节能环保的效果。(2) The confinement performance of circular steel pipes on concrete is far greater than that of square steel pipes, which can effectively overcome the brittleness of high-strength concrete. Therefore, concrete with higher strength can be poured in the round steel pipe, or high-strength recycled concrete can be used to achieve the effect of energy saving and environmental protection.
(3)不同截面形式可以单独使用或组合使用，有效解决异形截面巨型柱的应力集中问题。(3) Different cross-section forms can be used alone or in combination to effectively solve the stress concentration problem of giant columns with special-shaped cross-sections.
(4)圆钢管内浇筑混凝土，形成内嵌圆钢管混凝土柱形式，充分利用了圆钢管具有较大轴向抗压能力的特点。与方钢管具有较大截面惯性矩，压弯承载力高的特点相结合。极大的提高了钢管混凝土柱的承载力，从而保护人们的生命财产安全；(4) Concrete is poured into the circular steel pipe to form an embedded circular steel pipe concrete column, which fully utilizes the characteristics of the large axial compressive capacity of the circular steel pipe. Combined with the square steel pipe having a large section moment of inertia and high bending bearing capacity. Greatly improve the bearing capacity of steel pipe concrete columns, thus protecting people's lives and properties;
(5)巨型柱截面采用多腔形式，将大体积混凝土分为多个小体积混凝土，能够有效缓解混凝土水化热引起的温度裂缝；(5) The section of the giant column adopts a multi-cavity form, and the large-volume concrete is divided into multiple small-volume concrete, which can effectively alleviate the temperature cracks caused by the hydration heat of concrete;
(6)本发明经济有效，施工简单，适用于在建筑结构设计中推广应用。(6) The present invention is economical and effective, and has simple construction, and is suitable for popularization and application in building structure design.
附图说明：Description of drawings:
图1是异形截面多腔钢管内置圆钢管混凝土组合巨型柱基本腔体；Figure 1 is the basic cavity of a circular steel tube concrete composite giant column with a multi-cavity steel pipe with special-shaped cross-section;
图2是天津117超高层建筑原设计截面；Figure 2 is the original design section of Tianjin 117 super high-rise building;
图3是天津117超高层建筑角部内置圆钢管截面；Figure 3 is the cross-section of the built-in round steel pipe at the corner of Tianjin 117 super high-rise building;
图4是天津117超高层建筑整体添加原钢管截面；Figure 4 is the cross-section of the original steel pipe added to the overall addition of Tianjin 117 super high-rise building;
图5是北京Z15项目原设计截面；Figure 5 is the original design section of the Beijing Z15 project;
图6是北京Z15项目角部内置圆钢管截面；Figure 6 is the cross-section of the built-in round steel pipe at the corner of the Beijing Z15 project;
图7是异形截面多腔钢管内置圆钢管混凝土组合巨型柱局部示意图。Fig. 7 is a partial schematic diagram of a multi-cavity steel pipe with a special-shaped cross-section and a circular steel pipe concrete composite giant column.
图中：1-方钢管；2-横隔板；3-纵向加劲肋；4-圆钢管；5-普通高强混凝土；6-高性能高强混凝土。In the figure: 1-square steel pipe; 2-diaphragm; 3-longitudinal stiffener; 4-round steel pipe; 5-ordinary high-strength concrete; 6-high-performance high-strength concrete.
具体实施方式：detailed description:
为了更好地理解本发明，下面结合附图进一步阐明本发明内容。In order to better understand the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.
如附图1和附图7，一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱，基本腔体包括钢管1、横隔板2、纵向加劲肋3、圆钢管4；基本腔体截面形式可以为三角形，四边形，五边形，六边形，内置圆钢管4，内部焊接有横隔板2和纵向加劲肋3，钢管1内浇筑普通高强混凝土5，圆钢管4内浇筑高性能高强混凝土6。附图2为天津117超高层建筑原设计截面，附图3在附图2的基础上在角部内置圆钢管，附图5为北京Z15项目原设计截面，附图6为北京Z15项目角部内置圆钢管截面，这属于基本腔体的单独应用。附图4在附图2的基础上整体添加圆钢管，这属于基本腔体的组合应用。As shown in attached drawings 1 and 7, a multi-cavity steel pipe with special-shaped cross-section built-in circular steel pipe concrete composite giant column, the basic cavity includes steel pipe 1, transverse diaphragm 2, longitudinal stiffener 3, and round steel pipe 4; the cross-sectional form of the basic cavity Can be triangular, quadrangular, pentagonal, hexagonal, built-in round steel pipe 4, internally welded with transverse diaphragm 2 and longitudinal stiffener 3, ordinary high-strength concrete 5 is poured in steel pipe 1, and high-performance high-strength concrete is poured in round steel pipe 4 6. Attached Attachment 2 is the original design section of Tianjin 117 super high-rise building. Attached Attachment 3 is a round steel pipe built into the corner on the basis of Attached Attachment 2. Attached Attachment 5 is the original design cross section of Beijing Z15 Project. Attached Attachment 6 is the corner of Beijing Z15 Project. Built-in round steel tube section, which is a separate application of the basic cavity. Attached Figure 4 adds a round steel pipe as a whole on the basis of Figure 2, which belongs to the combined application of the basic cavity.
所述方钢管1采用Q345级钢板。内部焊接纵向加劲肋3，横隔板2，将大体积混凝土分为多个小体积混凝土，能够有效缓解大体积混凝土水化热引起的温度裂缝，保证混凝土强度。方钢管对混凝土形成约束作用，能够有效克服高强混凝土的脆性，钢管1内可以浇筑高强混凝土。The square steel pipe 1 adopts Q345 grade steel plate. The longitudinal stiffener 3 and the diaphragm 2 are internally welded to divide the mass concrete into multiple small volume concretes, which can effectively alleviate the temperature cracks caused by the hydration heat of the mass concrete and ensure the strength of the concrete. The square steel pipe forms a restraining effect on the concrete, which can effectively overcome the brittleness of high-strength concrete, and high-strength concrete can be poured in the steel pipe 1 .
所述横隔板2采用Q345级钢板，与钢管1焊接，提高方钢管整体稳定性。横隔板2上留有孔洞，直径不小于30mm，以便能够浇筑，振捣混凝土。The diaphragm 2 is made of Q345 grade steel plate, which is welded with the steel pipe 1 to improve the overall stability of the square steel pipe. A hole is left on the diaphragm 2, the diameter of which is not less than 30mm, so that the concrete can be poured and vibrated.
所述纵向加劲肋3采用Q235级钢板，与钢管1焊接，增强钢管1稳定性。纵向加劲肋3上留有孔洞，直径15mm，使圆钢管4周围4个腔体之间混凝土相互连通。The longitudinal stiffener 3 is made of Q235 grade steel plate, which is welded with the steel pipe 1 to enhance the stability of the steel pipe 1 . A hole is left on the longitudinal stiffener 3 with a diameter of 15mm, so that the concrete between the four cavities around the round steel pipe 4 communicates with each other.
所述圆钢管4采用外径89mm，壁厚4mm的无缝圆钢管系列Ⅰ。圆钢管与横隔板2、纵向加劲肋3焊接，提高圆钢管整体稳定性。内置圆钢管，能够提高方钢管混凝土柱的轴压和偏压承载力。The round steel pipe 4 is a seamless round steel pipe series I with an outer diameter of 89 mm and a wall thickness of 4 mm. The round steel pipe is welded with the diaphragm 2 and the longitudinal stiffener 3 to improve the overall stability of the round steel pipe. The built-in round steel pipe can improve the axial and eccentric bearing capacity of the square concrete filled steel tube column.
所述钢管1内浇筑普通高强混凝土5强度不低于C50，圆钢管4内浇筑高性能高强混凝土6强度不低于C60。The strength of ordinary high-strength concrete 5 poured in the steel pipe 1 is not lower than C50, and the strength of high-performance high-strength concrete 6 poured in the round steel pipe 4 is not lower than C60.
上述一种异形截面多腔钢管内置圆钢管混凝土组合巨型柱的施工方法，其特征在于包括以下步骤：The above-mentioned construction method of a multi-cavity steel pipe with special-shaped cross-section and a built-in circular steel pipe concrete composite giant column is characterized in that it includes the following steps:
1)基本腔体之间钢管1焊接连接；1) The steel pipe 1 is welded and connected between the basic cavities;
2)焊接横隔板2与钢管1；2) Welding the diaphragm 2 and the steel pipe 1;
3)焊接圆钢管4与横隔板2；3) Welding the round steel pipe 4 and the diaphragm 2;
4)纵向加劲肋3焊接于钢管1边板中点处，并与横隔板2，圆钢管4焊接；4) The longitudinal stiffener 3 is welded at the midpoint of the side plate of the steel pipe 1, and welded with the diaphragm 2 and the round steel pipe 4;
5)钢管1内浇筑普通高强混凝土5，圆钢管4内浇筑高性能高强混凝土6，圆钢管内混凝土强度高于方钢管内混凝土强度。5) Ordinary high-strength concrete 5 is poured in the steel pipe 1, and high-performance high-strength concrete 6 is poured in the round steel pipe 4, and the strength of the concrete in the round steel pipe is higher than that in the square steel pipe.
以上是本发明的一个典型的实施案例，但是本发明的实施不限于此。本发明中所列举的各结构尺寸及材料的选取均可根据实际需要选取，在此不再一一列举。The above is a typical example of implementation of the present invention, but the implementation of the present invention is not limited thereto. The selection of various structural dimensions and materials listed in the present invention can be selected according to actual needs, and will not be listed one by one here.
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