CN103953123A - H-shaped steel frame node with partially restricted beam end and construction method thereof - Google Patents
H-shaped steel frame node with partially restricted beam end and construction method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 106
- 239000010959 steel Substances 0.000 title claims abstract description 106
- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000005253 cladding Methods 0.000 claims abstract description 15
- 239000003351 stiffener Substances 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims description 19
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 10
- 239000004917 carbon fiber Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 229920006231 aramid fiber Polymers 0.000 claims description 9
- 239000000084 colloidal system Substances 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 abstract description 7
- 230000007935 neutral effect Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
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Abstract
梁端部分约束的H型钢框架节点及其施工方法,节点包括固连的H型钢梁、柱,H型钢梁靠近梁端的梁段外表面上缠绕有外包裹层,其与H型钢梁围成两独立空腔,两空腔内浇筑有混凝土。外包裹层和混凝土协同工作,减缓或抑制H型钢梁的局部屈曲,提高了结构的变形能力及延性;在承受载荷作用时,混凝土参与工作,使H型钢梁的中性轴上移,H型钢梁截面上有更多的部分参与受拉,从而提高抗弯承载能力,迫使塑性铰外移。施工方法:在工厂内将端板、栓钉与H型钢梁焊接,在H型钢柱上焊接横向加劲肋;在H型钢梁梁端预设梁段缠绕外包裹层;向外包裹层与H型钢梁所围成的两空腔内浇筑混凝土;将H型钢梁、柱在施工现场进行连接。该施工方法大幅度节省了现场施工时间和方便了施工。
H-shaped steel frame joints partially restrained at beam ends and its construction method. The joints include fixed H-shaped steel beams and columns. The outer surface of the beam section of the H-shaped steel beam near the beam end is wrapped with an outer cladding layer, which is connected with the H-shaped steel beam. Two independent cavities are surrounded, and concrete is poured in the two cavities. The outer cladding layer and concrete work together to slow down or inhibit the local buckling of the H-shaped steel beam, and improve the deformation capacity and ductility of the structure; when the load is applied, the concrete participates in the work, so that the neutral axis of the H-shaped steel beam moves upward, More parts of the H-shaped steel beam section participate in tension, thereby improving the bending capacity and forcing the plastic hinge to move outward. Construction method: weld the end plate, studs and H-shaped steel beams in the factory, and weld the transverse stiffeners on the H-shaped steel columns; wrap the outer wrapping layer around the preset beam section at the end of the H-shaped steel beam; wrap the outer wrapping layer with Concrete is poured in the two cavities surrounded by H-shaped steel beams; the H-shaped steel beams and columns are connected at the construction site. The construction method greatly saves on-site construction time and facilitates construction.
Description
技术领域technical field
本发明属于建筑结构技术领域,特别涉及一种梁端部分约束的H型钢梁框架节点及其施工方法。The invention belongs to the technical field of building structures, and in particular relates to an H-shaped steel beam frame node partially restrained at beam ends and a construction method thereof.
背景技术Background technique
H型钢框架是目前应用比较广泛的一种钢结构形式,通常由H型钢梁和H型钢柱构成,H型钢梁和H型钢柱通过焊接或者螺栓进行连接。为了提高该种框架的延性,满足抗震设计要求,通常期望在H型钢梁的端部形成塑性铰并保证有一定的转动能力。为了保证钢框架实现“强柱弱梁”、“强节点弱构件”的设计目标,并通过梁端形成的塑性铰来耗散地震动所输入的能力,通常采取构造措施迫使梁端的塑性铰外移。目前,将塑性铰位置从柱面外移的方法主要有两种:1、将梁端局部加强,如在H型钢梁的梁端设置加腋板、盖板等;2、距柱面一定距离的梁截面局部削弱,如局部翼缘削弱或腹部开洞等。但这些措施往往导致节点区域构造复杂、焊缝数量增加,且需要在现场施焊,存在施工难度大和焊缝质量难以保证的不足。此外,由于热影响区钢材脆性增加,往往导致钢梁翼缘产生脆性断裂,进而降低了H型钢框架的变形能力。H-shaped steel frame is a kind of steel structure that is widely used at present. It is usually composed of H-shaped steel beams and H-shaped steel columns. H-shaped steel beams and H-shaped steel columns are connected by welding or bolts. In order to improve the ductility of this kind of frame and meet the requirements of seismic design, it is usually expected to form a plastic hinge at the end of the H-shaped steel beam and ensure a certain rotation capacity. In order to ensure that the steel frame achieves the design goals of "strong columns and weak beams" and "strong joints and weak members", and to dissipate the input of ground motion through the plastic hinges formed at the beam ends, structural measures are usually taken to force the plastic hinges at the beam ends to shift. At present, there are two main methods to move the plastic hinge position away from the column surface: 1. Locally strengthen the beam end, such as setting a haunch plate, a cover plate, etc. at the beam end of the H-shaped steel beam; 2. A certain distance from the column surface Local weakening of the beam section, such as local flange weakening or web opening, etc. However, these measures often lead to complex structure of the joint area, increase in the number of welds, and the need for on-site welding, which has the disadvantages of difficult construction and difficult to guarantee the quality of welds. In addition, due to the increased brittleness of steel in the heat-affected zone, brittle fracture of the flange of the steel beam is often caused, thereby reducing the deformation capacity of the H-shaped steel frame.
发明内容Contents of the invention
本发明为解决公知技术中存在的技术问题而提供一种梁端部分约束的H型钢框架节点及施工方法,该节点在满足承载力要求的基础上,具有较高延性和受力可靠,该施工方法具有节省现场施工时间和施工方便的特点。In order to solve the technical problems existing in the known technology, the present invention provides an H-shaped steel frame joint and a construction method with beam ends partially restrained. The joint has high ductility and reliable stress on the basis of meeting the requirements of bearing capacity. The method has the characteristics of saving on-site construction time and convenient construction.
本发明为解决公知技术中存在的技术问题所采取的技术方案是:The technical scheme that the present invention takes for solving the technical problem existing in known technology is:
梁端部分约束的H型钢框架节点,包括端部焊接有端板的H型钢梁和H型钢柱,H型钢梁端部的端板通过螺纹连接件与H型钢柱固定连接,在H型钢柱上位于节点核心区位置焊接有多个横向加劲肋,其特征在于:在H型钢梁靠近梁端的梁段外表面上缠绕有外包裹层,所述外包裹层与H型钢梁围成周边封闭的两个独立空腔,在两空腔内浇筑有混凝土。H-shaped steel frame joints partially restrained at beam ends, including H-shaped steel beams and H-shaped steel columns welded with end plates, the end plates at the ends of H-shaped steel beams are fixedly connected with H-shaped steel columns through A plurality of transverse stiffeners are welded on the column at the core area of the node, which is characterized in that an outer cladding layer is wound on the outer surface of the beam section of the H-shaped steel beam near the beam end, and the outer cladding layer is surrounded by the H-shaped steel beam. There are two independent cavities closed around the periphery, and concrete is poured in the two cavities.
本发明还可以采用如下技术方案:The present invention can also adopt following technical scheme:
缠绕有外包裹层的梁段的长度为H型钢梁高度的0.5-1倍。The length of the beam segment wrapped with the outer cladding layer is 0.5-1 times the height of the H-shaped steel beam.
缠绕有外包裹层的梁段的上翼缘和下翼缘的内侧面上均设有多个栓钉,多个栓钉均嵌固在混凝土内。A plurality of studs are arranged on the inner side surfaces of the upper flange and the lower flange of the beam section wrapped with the outer wrapping layer, and the plurality of studs are all embedded in the concrete.
所述外包裹层为碳纤维布外包裹层或芳纶纤维布外包裹层。The outer wrapping layer is a carbon fiber cloth outer wrapping layer or an aramid fiber cloth outer wrapping layer.
本发明为解决公知技术中存在的技术问题所采取的技术方案是:The technical scheme that the present invention takes for solving the technical problem existing in known technology is:
梁端部分约束的H型钢框架节点的施工方法,其特征在于,包括以下施工步骤:The construction method of the H-shaped steel frame joint partially constrained by the beam end is characterized in that it comprises the following construction steps:
1)在工厂内将端板、栓钉与H型钢梁焊接,栓钉焊接在H型钢梁端部上翼缘和下翼缘的内侧面,端板上按设计要求预留螺栓孔,同时在H型钢柱上焊接横向加劲肋;1) Weld the end plate, studs and H-shaped steel beams in the factory, and the studs are welded to the inner sides of the upper and lower flanges of the H-shaped steel beam ends, and the bolt holes are reserved on the end plates according to the design requirements. At the same time, transverse stiffeners are welded on the H-shaped steel column;
2)在H型钢梁梁端预设梁段的上翼缘和下翼缘的外表面上涂抹胶体,然后在该预设梁段上缠绕碳纤维布或芳纶纤维布,在缠绕过程中在碳纤维布或芳纶纤维布的表面上涂抹配套的胶体,缠绕完毕后,形成外包裹层,外包裹层与H型钢梁围成周边封闭的两独立空腔;2) Apply colloid on the outer surface of the upper and lower flanges of the preset beam section at the end of the H-shaped steel beam, and then wrap carbon fiber cloth or aramid fiber cloth on the preset beam section. Apply matching colloid on the surface of carbon fiber cloth or aramid fiber cloth. After winding, an outer wrapping layer is formed. The outer wrapping layer and H-shaped steel beams form two independent cavities closed around the periphery;
3)当胶体固化后,向外包裹层与H型钢梁所围成的两空腔内浇筑混凝土;3) After the colloid is solidified, pour concrete into the two cavities surrounded by the outer cladding layer and the H-shaped steel beam;
4)当混凝土强度达到设计要求后,将H型钢梁和H型钢柱运抵施工现场,在施工现场用螺纹连接件将H型钢梁与H型钢柱连接成整体,形成梁端部分约束的H型钢框架节点。4) When the concrete strength meets the design requirements, the H-shaped steel beams and H-shaped steel columns are transported to the construction site, and the H-shaped steel beams and H-shaped steel columns are connected into a whole with threaded connectors on the construction site to form a partially restrained beam end. H-shaped steel frame nodes.
本发明具有的优点和积极效果是:The advantages and positive effects that the present invention has are:
1、缠绕在H型钢梁的梁端梁段上的外包裹层和浇筑在空腔内的混凝土协同工作,减缓或抑制H型钢梁的局部屈曲,在满足承载能力要求的基础上,提高了结构的变形能力及延性。1. The outer cladding layer wound on the beam end beam section of the H-shaped steel beam and the concrete poured in the cavity work together to slow down or inhibit the local buckling of the H-shaped steel beam, and improve the bearing capacity on the basis of meeting the requirements of the bearing capacity. The deformation capacity and ductility of the structure are improved.
2、在承受载荷作用时,浇筑在空腔内的混凝土参与工作,使H型钢梁的中性轴上移,H型钢截面上有更多的部分参与受拉,从而提高抗弯承载能力,迫使塑性铰外移,其相比于现有技术,最大限度的减少梁端焊缝的数量。2. When bearing the load, the concrete poured in the cavity participates in the work, so that the neutral axis of the H-shaped steel beam moves upward, and more parts of the H-shaped steel section participate in tension, thereby improving the flexural bearing capacity. The plastic hinge is forced to move outward, which minimizes the number of beam end welds compared to the prior art.
3、缠绕外包裹层和向空腔内浇筑混凝土均在工厂内完成,仅需要在施工现场,将H型钢梁和H型钢柱通过螺纹连接件连接固定即可,因此,大幅度节省了现场施工时间和方便了施工。3. Winding the outer wrapping layer and pouring concrete into the cavity are all completed in the factory. It is only necessary to connect and fix the H-shaped steel beams and H-shaped steel columns through threaded connectors at the construction site. Therefore, the site is greatly saved. Construction time and convenience for construction.
附图说明Description of drawings
图1是本发明的结构示意图;Fig. 1 is a structural representation of the present invention;
图2是图1的A-A截面图。Fig. 2 is an A-A sectional view of Fig. 1 .
图中:1、H型钢梁;2、H型钢柱;3、端板;4、横向加劲肋;5、外包裹层;6、混凝土;7、栓钉。In the figure: 1. H-shaped steel beam; 2. H-shaped steel column; 3. End plate; 4. Transverse stiffener; 5. Outer cladding; 6. Concrete; 7. Stud.
具体实施方式Detailed ways
为能进一步了解本发明的发明内容、特点及功效,兹例举以下实施例,并配合附图详细说明如下:In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
梁端部分约束的H型钢框架节点,请参阅图1-2,包括H型钢梁1和H型钢柱2,在H型钢梁的端部焊接有端板3。H型钢梁端部的端板通过高强螺栓和配套螺母或其他的螺纹连接件与H型钢柱固定连接。在H型钢柱上位于节点核心区位置焊接有多个横向加劲肋4。在H型钢梁靠近梁端的梁段外表面上缠绕有外包裹层5,所述外包裹层与H型钢梁围成周边封闭的两独立空腔,在两空腔内浇筑有混凝土6。混凝土最好采用具有微膨胀效果的混凝土,这样,可充分填充外包裹层与H型钢梁所围成的空腔。H-shaped steel frame joints partially restrained at the beam end, please refer to Figure 1-2, including H-shaped steel beam 1 and H-shaped steel column 2, and an end plate 3 is welded at the end of the H-shaped steel beam. The end plate at the end of the H-shaped steel beam is fixedly connected to the H-shaped steel column through high-strength bolts and matching nuts or other threaded connectors. A plurality of transverse stiffeners 4 are welded on the H-shaped steel column at the node core area. An outer cladding layer 5 is wound on the outer surface of the beam section near the beam end of the H-shaped steel beam. The outer cladding layer and the H-shaped steel beam enclose two independent cavities closed around the periphery, and concrete 6 is poured in the two cavities. Concrete is preferably concrete with micro-expansion effect, so that the cavity surrounded by the outer cladding layer and the H-shaped steel beam can be fully filled.
上述结构中,缠绕有外包裹层的梁段的长度优选为H型钢梁高度的0.5-1倍。该长度值完全符合梁端形成的塑性铰长度通常为0.5-1倍的梁高的要求。In the above structure, the length of the beam segment wrapped with the outer cladding layer is preferably 0.5-1 times the height of the H-shaped steel beam. This length value fully meets the requirement that the length of the plastic hinge formed at the beam end is usually 0.5-1 times the beam height.
上述结构中,在缠绕有碳纤维布外包裹层的梁段的上翼缘和下翼缘的内侧面上均进一步焊接有多个栓钉7,多个栓钉均嵌固在混凝土内。采用该栓钉结构,可提高混凝土与H型钢梁翼缘的协同工作,使混凝土更好的参与受压以改变中性轴的位置。In the above structure, a plurality of studs 7 are further welded on the inner sides of the upper flange and the lower flange of the beam section wrapped with the outer wrapping layer of carbon fiber cloth, and the plurality of studs are all embedded in the concrete. The stud structure can improve the cooperation between the concrete and the flange of the H-shaped steel beam, so that the concrete can better participate in the compression to change the position of the neutral axis.
上述结构中,所述外包裹层优选为碳纤维布外包裹层或芳纶纤维布外包裹层。In the above structure, the outer wrapping layer is preferably a carbon fiber cloth outer wrapping layer or an aramid fiber cloth outer wrapping layer.
梁端部分约束的H型钢框架节点的施工过程为:The construction process of H-shaped steel frame joints partially constrained by beam ends is as follows:
1)在工厂内将端板、栓钉与H型钢梁焊接,栓钉焊接在H型钢梁端部上翼缘和下翼缘的内侧面,端板上按设计要求预留螺栓孔,同时在H型钢柱上焊接横向加劲肋,其中加劲肋和端板的布置要求与普通H型钢框架节点的相同;1) Weld the end plate, studs and H-shaped steel beams in the factory, and the studs are welded to the inner sides of the upper and lower flanges of the H-shaped steel beam ends, and the bolt holes are reserved on the end plates according to the design requirements. At the same time, transverse stiffeners are welded on the H-shaped steel columns, and the layout requirements of the stiffeners and end plates are the same as those of ordinary H-shaped steel frame joints;
2)在H型钢梁梁端预设梁段的上翼缘和下翼缘的外表面上涂抹胶体,然后在该预设梁段上缠绕碳纤维布或芳纶纤维布,在缠绕过程中在碳纤维布或芳纶纤维布的表面上涂抹配套的胶体,缠绕完毕后,形成外包裹层,外包裹层与H型钢梁围成周边封闭的两独立空腔;2) Apply colloid on the outer surface of the upper and lower flanges of the preset beam section at the end of the H-shaped steel beam, and then wrap carbon fiber cloth or aramid fiber cloth on the preset beam section. Apply matching colloid on the surface of carbon fiber cloth or aramid fiber cloth. After winding, an outer wrapping layer is formed. The outer wrapping layer and H-shaped steel beams form two independent cavities closed around the periphery;
3)当胶体固化后,向外包裹层与H型钢梁所围成的两空腔内浇筑混凝土;3) After the colloid is solidified, pour concrete into the two cavities surrounded by the outer cladding layer and the H-shaped steel beam;
4)当混凝土强度达到设计要求后,将H型钢梁和H型钢柱运抵施工现场,在施工现场用高强螺栓及配套螺母或其他的螺纹连接件将H型钢梁与H型钢柱连接成整体,形成梁端部分约束的H型钢框架节点。4) When the concrete strength meets the design requirements, transport the H-shaped steel beams and H-shaped steel columns to the construction site, and connect the H-shaped steel beams and H-shaped steel columns with high-strength bolts and matching nuts or other threaded connectors at the construction site Integral, H-shaped steel frame joints that form partly constrained beam ends.
本梁端部分约束的H型钢框架节点具有结构简单,施工方便的优点,其不仅适用于新建的普通工业民用建筑结构,也可用于此类钢框架的结构加固,有广阔的应用前景。The H-shaped steel frame joints partially constrained by beam ends have the advantages of simple structure and convenient construction. It is not only suitable for newly-built ordinary industrial and civil building structures, but also can be used for structural reinforcement of such steel frames, and has broad application prospects.
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