CN106978884B - A composite load-bearing column that can be assembled with light steel pipe-constrained small-diameter wood and its method - Google Patents
A composite load-bearing column that can be assembled with light steel pipe-constrained small-diameter wood and its method Download PDFInfo
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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
- 239000002023 wood Substances 0.000 title claims abstract description 55
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 32
- 239000004917 carbon fiber Substances 0.000 claims abstract description 32
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims abstract description 26
- 238000009415 formwork Methods 0.000 claims abstract description 24
- 239000004567 concrete Substances 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 15
- 239000004576 sand Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 11
- 239000004816 latex Substances 0.000 claims description 10
- 229920000126 latex Polymers 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000010985 leather Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims description 2
- 240000004282 Grewia occidentalis Species 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000011160 research Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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Abstract
本发明公开了一种可装配轻型钢管‑约束小径木材组合承重柱及作法,属于结构工程技术领域;本发明适用于村镇低、多层装配式建筑的发展;轻型钢管与预埋连接钢筋浇筑混凝土后形成外部装配模板,小径木材在FRP碳纤维布的围护约束下承载力大大提高,柱结构的承载能力可提高30%,同时装配施工简单,由于较好的利用和开发了小径木材,做到了绿色环保低碳。
The invention discloses an assembleable light-duty steel pipe-constrained small-diameter wood composite load-bearing column and its method, which belong to the technical field of structural engineering; the invention is suitable for the development of low and multi-storey prefabricated buildings in villages and towns; light-duty steel pipes and pre-embedded connecting steel bars are poured into concrete After forming an external assembly formwork, the bearing capacity of the small-diameter timber is greatly improved under the enclosure constraints of FRP carbon fiber cloth, and the bearing capacity of the column structure can be increased by 30%. At the same time, the assembly and construction are simple. Due to the better use and development of small-diameter timber, Green and low carbon.
Description
技术领域technical field
本发明涉及一种可装配轻型钢管-约束小径木材组合承重柱及作法,属于结构工程技术领域。The invention relates to an assembleable light-duty steel pipe-constrained small-diameter wood composite load-bearing column and a method thereof, which belong to the technical field of structural engineering.
背景技术Background technique
随着我国住宅建设的快速发展,为满足人民群众日益增长的住房需求,推进住宅产业现代化,发展钢结构住宅,扩大钢结构住宅的市场占有率。推动建造方式创新,大力发展装配式混凝土建筑和钢结构建筑,在具备条件的地方倡导发展现代木结构建筑,不断提高装配式建筑在新建建筑中的比例。可以预见装配式结构将成为我国未来主要的建筑形式。With the rapid development of housing construction in my country, in order to meet the growing housing needs of the people, promote the modernization of the housing industry, develop steel structure housing, and expand the market share of steel structure housing. Promote the innovation of construction methods, vigorously develop prefabricated concrete buildings and steel structure buildings, advocate the development of modern wood structure buildings where conditions permit, and continuously increase the proportion of prefabricated buildings in new buildings. It can be predicted that the prefabricated structure will become the main architectural form in my country in the future.
随着资源的不断匮乏,我国的木材资源也面临着严峻的问题,由于多数国家应经禁止出口原木木材,因此依靠进口木材已经变得不可能,同时,在使用过程中由于对大直径木材的青睐,导致小直径(尺寸为40mm~130mm)的木材很少被完整的开发和使用,多数小径木材被严重浪费。如何完整的开发和利用被人忽视的小径木材已经成为了当前热点的研究问题,这一问题的解决不仅将有效地缓解资源危机,在某种程度上也解决了森林资源供需矛盾。With the continuous shortage of resources, my country's timber resources are also facing severe problems. Since most countries should ban the export of log timber, it has become impossible to rely on imported timber. At the same time, due to the large-diameter timber during use Favored, resulting in small diameter (size 40mm ~ 130mm) timber is rarely fully developed and used, most of the small diameter timber is seriously wasted. How to fully develop and utilize neglected trail timber has become a current hot research issue. The solution to this issue will not only effectively alleviate the resource crisis, but also solve the contradiction between supply and demand of forest resources to some extent.
碳纤维以其优异的综合性能成为当今世界材料学科研究的重点。研究表明:碳纤维的抗拉强度>3500MPa,抗拉模量>230GPa,密度仅为1.76~1.94g/cm,具有优异的力学性能和综合特性;碳纤维已在建筑、能源等等领域和行业得到广泛应用。Carbon fiber has become the focus of material science research in the world today because of its excellent comprehensive properties. Research shows that the tensile strength of carbon fiber is >3500MPa, the tensile modulus is >230GPa, and the density is only 1.76-1.94g/cm, which has excellent mechanical properties and comprehensive characteristics; carbon fiber has been widely used in construction, energy and other fields and industries. application.
传统的钢筋混凝土柱结构承载力普遍较差,施工过程中需要使用大量的(木)模板,容易造成资源的严重浪费,同时施工养护需要大量的工期,无法适应目前装配式建筑的发展。基于此,本发明提出了一种可装配轻型钢管-约束小径木材组合承重柱,轻型钢管部件作为外部可装配模板,内部填充由FRP碳纤维布约束的小径木材,相比于传统的混凝土承重柱,其承载力显著提高,具有可装配式施工的特点,同时充分发挥和利用了小径木材,符合目前装配式发展的新要求,适用于低、多层装配式建筑的发展。The bearing capacity of traditional reinforced concrete column structures is generally poor. During the construction process, a large number of (wooden) formworks are required, which is likely to cause a serious waste of resources. At the same time, construction and maintenance require a large amount of time, which cannot adapt to the current development of prefabricated buildings. Based on this, the present invention proposes a composite load-bearing column that can be assembled with light-weight steel pipe-constrained small-diameter wood. The light-weight steel pipe part is used as an external assembly formwork, and the interior is filled with small-diameter wood constrained by FRP carbon fiber cloth. Compared with traditional concrete load-bearing columns, Its bearing capacity has been significantly improved, and it has the characteristics of prefabricated construction. At the same time, it has fully utilized and utilized small-diameter wood, which meets the new requirements of the current prefabricated development and is suitable for the development of low and multi-storey prefabricated buildings.
发明内容Contents of the invention
本发明的目的在于提供一种具有可装配式施工、构造简单、施工方便、绿色环保一体化等优点的可装配轻型钢管-约束小径木材组合承重柱,以期有效解决传统混凝土柱承载能力不佳,装配化效率低,资源利用率低等问题。The purpose of the present invention is to provide a light-weight steel pipe-constrained small-diameter wood composite load-bearing column that can be assembled with the advantages of assembling construction, simple structure, convenient construction, and green environmental protection, in order to effectively solve the poor bearing capacity of traditional concrete columns. Low assembly efficiency and low resource utilization.
为实现上述目的,本发明采用如下技术方案:To achieve the above object, the present invention adopts the following technical solutions:
一种可装配轻型钢管-约束小径木材组合承重柱,该组合承重柱包括小径木材1、木屑填充物2、FRP碳纤维布3、混凝土4、预埋连接钢筋5和轻型钢管6;混凝土4、预埋连接钢筋5和轻型钢管6组成组合承重柱的外部装配式模板;小径木材1、木屑填充物2由FRP碳纤维布3约束围护组成内部填充结构,内部填充结构设置在外部装配式模板中间;预埋连接钢筋5设置在轻型钢管6的周向角部处,小径木材1设置在由FRP碳纤维布3围护成的圆形内部填充结构中间,木屑填充物2填充在小径木材1与FRP碳纤维布3之间的空隙处;FRP碳纤维布3与轻型钢管6之间填充有混凝土4。A composite load-bearing column that can be assembled with light steel pipe-constrained small-diameter wood. Buried connecting steel bars 5 and light steel pipes 6 form the external assembled formwork of combined load-bearing columns; small-diameter wood 1 and sawdust filler 2 are bounded by FRP carbon fiber cloth 3 to form an internal filling structure, and the internal filling structure is set in the middle of the external assembly formwork; The pre-embedded connecting steel bar 5 is arranged at the circumferential corner of the light steel pipe 6, the small-diameter wood 1 is arranged in the middle of the circular inner filling structure surrounded by the FRP carbon fiber cloth 3, and the sawdust filler 2 is filled in the small-diameter wood 1 and the FRP carbon fiber cloth 3 The gap between the FRP carbon fiber cloth 3 and the light steel pipe 6 is filled with concrete 4 .
所述小径木材1为带皮直径为40mm~80mm的木材,预先将小径木材1加工成截面为矩形,便于小径木材的充分利用,矩形的边长尺寸为20mm的倍数,如20mm×40mm,40mm×40mm,40mm×20mm,20mm×20mm,小径木材1在内部填充结构中间呈分层交错布置;各层小径木材1以及各个小径木材1之间通过乳胶进行粘结。The small-diameter timber 1 is timber with a leather diameter of 40 mm to 80 mm. The small-diameter timber 1 is processed into a rectangular section in advance to facilitate the full utilization of the small-diameter timber. The side length of the rectangle is a multiple of 20 mm, such as 20 mm × 40 mm, 40 mm ×40mm, 40mm×20mm, 20mm×20mm, small-diameter wood 1 is arranged in layers and staggered in the middle of the internal filling structure; each layer of small-diameter wood 1 and each small-diameter wood 1 are bonded by latex.
木屑填充物2由木屑、乳胶、细沙、水泥和水组成,木屑为小径木材1预先加工时的产物,木屑、乳胶、细沙、水泥、水按照1:1:0.25:0.25:0.05进行均匀拌合,细沙的颗粒直径为5mm-10mm,木屑、乳胶、细沙、水泥、水均匀拌合后应在初凝前完成填充工作。The sawdust filler 2 is composed of sawdust, latex, fine sand, cement and water. The sawdust is the product of the pre-processing of the small-diameter wood 1. The sawdust, latex, fine sand, cement and water are uniformly mixed according to the ratio of 1:1:0.25:0.25:0.05. Mixing, the particle diameter of the fine sand is 5mm-10mm, after the sawdust, latex, fine sand, cement and water are evenly mixed, the filling work should be completed before the initial setting.
所述FRP碳纤维布3由12K碳纤维丝织制而成,FRP碳纤维布3粘结在外部装配模板的内腔壁上,以提高对内部结构的约束作用。粘结层数宜为2~3层,黏贴时每层FRP碳纤维布3需进行搭接,搭接长度不低于150mm,且搭接区域额外涂刷底胶,防止搭接区域松开。The FRP carbon fiber cloth 3 is woven from 12K carbon fiber silk, and the FRP carbon fiber cloth 3 is bonded to the inner cavity wall of the external assembly template to improve the restraint effect on the internal structure. The number of bonding layers should be 2 to 3 layers. When pasting, each layer of FRP carbon fiber cloth 3 needs to be overlapped. The length of the overlap should not be less than 150mm, and an additional primer should be applied to the overlapped area to prevent the overlapped area from loosening.
所述混凝土4为普通混凝土或者再生混凝土,外部装配模板为工厂化预制而成。混凝土4的强度等级根据要求选用,当选用为再生混凝土时,粗骨料取代率为0-100%,细骨料选用天然砂或者机制砂,即细骨料不取代。The concrete 4 is ordinary concrete or recycled concrete, and the external assembly formwork is prefabricated in a factory. The strength grade of concrete 4 is selected according to the requirements. When recycled concrete is selected, the replacement rate of coarse aggregate is 0-100%, and the fine aggregate is selected from natural sand or machine-made sand, that is, fine aggregate is not replaced.
所述预埋连接钢筋5为装配式连接时用的连接钢筋,外部装配模板为工厂化预制而成。预埋连接钢筋5直径宜为12mm-14mm,钢筋强度等级大于HRB335,预埋连接钢筋5的外伸长度大于200mm,方便装配施工时套筒连接。The pre-embedded connecting steel bars 5 are connecting steel bars used for prefabricated connections, and the external assembly formwork is prefabricated in a factory. The diameter of the pre-embedded connecting steel bar 5 should be 12mm-14mm, the strength grade of the steel bar is greater than HRB335, and the extension length of the pre-embedded connecting steel bar 5 is greater than 200mm, which is convenient for sleeve connection during assembly and construction.
所述轻型钢管6为结构最外侧钢管,外部装配模板为预制结构。轻型钢管6的截面为圆形或者矩形,考虑到后期装配方便,建议采用矩形形式,钢管厚度不大于5mm,钢管外尺寸不应大于200mm。The light steel pipe 6 is the outermost steel pipe of the structure, and the external assembly template is a prefabricated structure. The cross-section of the light steel pipe 6 is circular or rectangular. Considering the convenience of later assembly, it is recommended to adopt a rectangular form. The thickness of the steel pipe is not greater than 5mm, and the outer dimension of the steel pipe should not be greater than 200mm.
利用组合承重柱进行的一种可装配轻型钢管-约束小径木材组合承重柱的制作方法,该方法实施过程如下:A method for fabricating a composite load-bearing column that can be assembled with light-weight steel pipes-constrained small-diameter wood using a composite load-bearing column. The implementation process of the method is as follows:
第一步,定位和架立轻型钢管6,将预先加工的圆环钢模放入轻型钢管6内部,确定对应四角预埋连接钢筋5的位置,架立预埋连接钢筋5,之后向四角浇筑混凝土4,养护形成装配外模板,装配外模板通过预埋连接钢筋5进行套筒式装配连接,此步骤在工厂预制完成外部装配式模板;The first step is to locate and erect the light-weight steel pipe 6, put the pre-processed circular steel mold into the light-weight steel pipe 6, determine the position corresponding to the embedded connecting steel bars 5 at the four corners, erect the embedded connecting steel bars 5, and then pour into the four corners Concrete 4, curing to form an assembled outer formwork, and the assembled outer formwork is sleeve-type assembled and connected through the pre-embedded connecting steel bars 5, and this step is prefabricated in the factory to complete the external assembled formwork;
第二步,预先在外部装配式模板内部确定内部填充结构的位置,在外部装配式模板的内框腔壁涂刷粘结胶,铺贴FRP碳纤维布3,黏贴层数为2~3层,黏贴时的搭接长度大于等于150mm,每层黏贴层均涂刷粘结胶;The second step is to pre-determine the position of the internal filling structure inside the external assembly formwork, brush the adhesive glue on the inner frame cavity wall of the external assembly formwork, and lay FRP carbon fiber cloth 3, and the number of adhesive layers is 2 to 3 layers , the lap length when pasting is greater than or equal to 150mm, and each layer of pasting layer is coated with adhesive glue;
第三步,向FRP碳纤维布3组成的圆框内填充预先初步加工的小径木材1,小径木材1通过乳胶进行粘结固定;The third step is to fill the circular frame composed of FRP carbon fiber cloth 3 with preliminarily processed small-diameter wood 1, and the small-diameter wood 1 is bonded and fixed by latex;
第四步,在FRP碳纤维布3与小径木材1之间的剩余空隙位置灌入木屑填充物2,即形成轻型钢管-约束小径木材组合承重柱。The fourth step is to pour sawdust filler 2 into the remaining gap between the FRP carbon fiber cloth 3 and the small-diameter wood 1 to form a light-duty steel pipe-constrained small-diameter wood composite load-bearing column.
本发明一种可装配轻型钢管-约束小径木材组合承重柱适用于低、多层装配式建筑的发展。通过FRP碳纤维对内部小径木材进行合理约束,大大提高了核心填充结构的承载能力,外部装配模板可工厂化预制,通过预埋连接钢筋联系上下结构,具有施工装配方便等特点,由于较好的开发和利用了小径木材,做到了绿色环保低碳。The invention is an assembleable light-duty steel pipe-constrained small-diameter wood composite load-bearing column, which is suitable for the development of low and multi-storey prefabricated buildings. The internal small-diameter wood is reasonably restrained by FRP carbon fiber, which greatly improves the bearing capacity of the core filling structure. The external assembly formwork can be prefabricated in a factory, and the upper and lower structures are connected by pre-embedded connecting steel bars, which has the characteristics of convenient construction and assembly. Due to better development And the use of trail wood has achieved green environmental protection and low carbon.
附图说明Description of drawings
图1是一种可装配轻型钢管-约束小径木材组合承重柱截面图。Fig. 1 is a cross-sectional view of a composite load-bearing column that can be assembled with light-weight steel pipe-constrained small-diameter wood.
图2一种可装配轻型钢管-约束小径木材组合承重柱立面图。Fig. 2 is an elevation view of a composite load-bearing column that can be assembled with light-duty steel pipe-constrained small-diameter wood.
图中:1小径木材、2木屑填充物、3FRP碳纤维布、4混凝土、5预埋连接钢筋、6轻型钢管。In the figure: 1 small-diameter wood, 2 sawdust filling, 3 FRP carbon fiber cloth, 4 concrete, 5 pre-embedded connecting steel bars, 6 light steel pipes.
具体实施方式Detailed ways
下面结合具体实施例对本发明做进一步说明:The present invention will be further described below in conjunction with specific embodiment:
如图1-2所示,本发明的一种可装配轻型钢管-约束小径木材组合承重柱,包括小径木材1、木屑填充物2、FRP碳纤维布3、混凝土4、预埋连接钢筋5和轻型钢管6。内部填充小径木材,外围为FRP碳纤维布,同时剩余空隙内浇筑木屑填充物2组成内部填充结构,FRP碳纤维布对内部小径木材产生了较好的核心约束作用,大大提高了结构的承载能力,由混凝土4、预埋连接钢筋4和轻型钢管6组成的外部模板可以实现装配式连接,施工简单方便,同时小径木材得到合理的开发和利用,更加绿色环保,适宜于低、多层的新型建筑体系。As shown in Figure 1-2, a light-weight steel pipe-constrained small-diameter wood composite load-bearing column of the present invention includes small-diameter wood 1, sawdust filler 2, FRP carbon fiber cloth 3, concrete 4, pre-embedded connecting steel bars 5 and light steel pipe6. The interior is filled with small-diameter wood, and the periphery is FRP carbon fiber cloth. At the same time, wood chip filler 2 is poured into the remaining gaps to form an internal filling structure. The external formwork composed of concrete 4, pre-embedded connecting steel bars 4 and light steel pipe 6 can realize prefabricated connection, and the construction is simple and convenient. At the same time, small-diameter timber is rationally developed and utilized, which is more green and environmentally friendly, and is suitable for low and multi-storey new building systems .
以上是本发明的一个典型实施例,本发明的实施不限于此。The above is a typical embodiment of the present invention, and the practice of the present invention is not limited thereto.
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CN107901169A (en) * | 2017-11-22 | 2018-04-13 | 中南林业科技大学 | A kind of bamboo reinforcement solid wood combined hollow column and preparation method thereof |
CN108894328A (en) * | 2018-07-24 | 2018-11-27 | 沈阳建筑大学 | A kind of novel combined column and assemble method |
CN108894326A (en) * | 2018-07-24 | 2018-11-27 | 沈阳建筑大学 | A kind of combined member and assemble method |
CN109208823B (en) * | 2018-11-12 | 2024-03-08 | 安徽工程大学 | Quick-assembly built-in steel box type concrete filled steel tube column and production process thereof |
CN110984608A (en) * | 2019-11-07 | 2020-04-10 | 江苏大学 | A kind of method of strengthening wooden structure column and strengthening wooden structure column structure |
CN112031274A (en) * | 2020-06-24 | 2020-12-04 | 南京林业大学 | Preparation method of FRP steel bamboo concrete composite member |
CN117127755B (en) * | 2023-09-25 | 2024-07-12 | 中南大学 | Bamboo-like outer constraint support tube concrete column |
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CN100507176C (en) * | 2007-12-06 | 2009-07-01 | 合肥工业大学 | A steel pipe-FRP pipe filled with concrete composite structure |
US8650831B2 (en) * | 2011-07-14 | 2014-02-18 | Mohammad R. Ehsani | Reconstruction methods for structural elements |
CN102704622A (en) * | 2012-04-25 | 2012-10-03 | 南京林业大学 | FRP (fiber reinforced plastic), concrete and hollow original bamboo cylindrical beam |
CN103953162A (en) * | 2014-04-14 | 2014-07-30 | 北京工业大学 | Light steel-undersized log-carbon fiber combined load-bearing pillar with rectangular section and preparation method thereof |
CN103967215B (en) * | 2014-04-14 | 2016-10-26 | 北京工业大学 | Light steel-timber with small diameter-carbon fibers the load-bearing pillar of circular cross-section and the practice |
CN104631704B (en) * | 2014-12-30 | 2016-09-14 | 南京林业大学 | Porous FRP or composite bamboo tube biomass hollow raw bamboo cylinder |
CN105201143A (en) * | 2015-10-16 | 2015-12-30 | 沈阳建筑大学 | Carbon fiber thin-wall steel tube concrete composite column with internal FRP sectional material and method |
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