CN110185160A - A kind of compound concrete-filled tubular column and steel beam connecting joint and preparation method thereof - Google Patents
A kind of compound concrete-filled tubular column and steel beam connecting joint and preparation method thereof Download PDFInfo
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- CN110185160A CN110185160A CN201910454708.7A CN201910454708A CN110185160A CN 110185160 A CN110185160 A CN 110185160A CN 201910454708 A CN201910454708 A CN 201910454708A CN 110185160 A CN110185160 A CN 110185160A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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Abstract
本发明公开了一种复式钢管混凝土柱与钢梁连接节点及其制作方法，包括：内钢管、外钢管、锚固板和钢梁；其中，内钢管外套设有外钢管，外钢管的侧壁上分别连接有钢梁；内钢管的侧壁上均匀设置有多个锚固板，外钢管上设置有与锚固板相匹配的卡槽，锚固板穿过卡槽并伸出外钢管外；锚固板的伸出端与钢梁的腹板通过第一固定机构连接。该复式钢管混凝土柱与钢梁连接节点为上焊下栓式，钢梁上翼缘与上外环板之间采用焊缝连接，钢筋混凝土楼板可有效保护连接焊缝不至于发生撕裂破坏；钢梁下翼缘与下外环板之间采用螺栓连接，增强了组合节点在地震荷载作用下的变形能力；其制作方法简单，易操作实施。
The invention discloses a composite steel pipe concrete column and steel beam connection node and a manufacturing method thereof, comprising: an inner steel pipe, an outer steel pipe, an anchor plate and a steel beam; wherein, an outer steel pipe is provided outside the inner steel pipe, and an outer steel pipe is provided on the side wall of the outer steel pipe The steel beams are respectively connected; the side wall of the inner steel pipe is evenly provided with a plurality of anchor plates, and the outer steel pipe is provided with a slot matching the anchor plate, and the anchor plate passes through the slot and extends out of the outer steel pipe; the extension of the anchor plate The outlet end is connected with the web plate of the steel beam through the first fixing mechanism. The joint between the composite steel pipe concrete column and the steel beam is welded at the top and bolted at the bottom, and the upper flange of the steel beam and the upper outer ring plate are connected by a weld seam. The reinforced concrete floor can effectively protect the joint weld from tearing and damage; the steel beam Bolts are used between the lower flange and the lower outer ring plate, which enhances the deformation capacity of the composite joint under seismic loads; the manufacturing method is simple and easy to operate and implement.
Description
技术领域technical field
本发明涉及土木工程技术领域，具体涉及一种复式钢管混凝土柱与钢梁连接节点及其制作方法。The invention relates to the technical field of civil engineering, in particular to a connection node between a composite steel pipe concrete column and a steel beam and a manufacturing method thereof.
背景技术Background technique
复式钢管混凝土结构是在钢管混凝土结构的基础上发展起来的新型结构形式，它是在两层或多层钢管中灌注混凝土而形成的。根据最内层钢管中是否填充混凝土可以分为实复式和中空复式钢管混凝土两种，根据内外钢管的截面形式不同又可分为内圆外圆、内圆外方等复式钢管混凝土结构，如图1所示；其中图(a)为内圆外圆复式钢管混凝土柱截面图，图(b)为内圆外方复式钢管混凝土柱截面图。The composite steel tube concrete structure is a new type of structure developed on the basis of the steel tube concrete structure, which is formed by pouring concrete into two or more layers of steel tubes. According to whether the innermost steel pipe is filled with concrete, it can be divided into two types: solid composite and hollow composite steel pipe concrete. According to the different cross-sectional forms of the inner and outer steel pipes, it can be divided into composite steel pipe concrete structures such as inner circle and outer circle, inner circle and outer square, as shown in the figure. 1; Figure (a) is a cross-sectional view of an inner-circle and outer-circle compound concrete-filled steel tube column, and figure (b) is a cross-sectional view of an inner-circle and outer-square compound steel tube concrete column.
复式钢管混凝土柱具有承载力高、延性及耐火性能好、防倒塌能力强等优点，可应用于强震地区的组合框架结构。复式钢管混凝土柱解决了重载柱问题，在高轴压比作用下具有较好的延性及抗震性能，而与钢梁的连接节点形式研究较少，没有可供参考的技术规程，从而阻碍了复式钢管混凝土柱的工程应用。在实际工程中，大多数结构都有楼板存在，钢筋混凝土楼板与钢梁的相互作用使组合节点正弯矩提高明显，钢梁下翼缘变形需求增大，导致组合节点发生梁端局部破坏或柱端破坏，滞回曲线不饱满，耗能能力降低，所以建议今后对组合节点的研究中应合理考虑楼板作用。Composite concrete-filled steel tube columns have the advantages of high bearing capacity, good ductility and fire resistance, and strong collapse resistance, and can be applied to composite frame structures in strong earthquake regions. The composite CFST column solves the problem of heavy-duty columns, and has good ductility and seismic performance under the action of high axial compression ratio. However, there are few studies on the joint form of the connection with the steel beam, and there are no technical regulations for reference, which hinders the Engineering application of composite steel tube concrete columns. In actual engineering, most structures have floor slabs. The interaction between reinforced concrete floors and steel beams increases the positive bending moment of composite joints significantly, and the demand for deformation of the lower flange of steel beams increases, resulting in local failure or failure of beam ends at composite nodes. If the column end is damaged, the hysteretic curve is not full, and the energy dissipation capacity is reduced. Therefore, it is suggested that the floor effect should be considered reasonably in the future research on composite joints.
现有的关于复式钢管混凝土柱-钢梁节点的连接均是全焊接连接节点，破坏模态为梁端焊缝连接区域的局部破坏，未能充分发挥复式钢管混凝土柱的力学性能。钢管混凝土柱-钢梁焊接节点在地震荷载作用下易发生钢梁下翼缘焊缝撕裂的脆性破坏，未能有效发挥组合节点的抗震性能。因此，急需在复式钢管混凝土柱节点的研究基础上，对其构造形式进行改进，提高梁柱连接区域的强度和变形能力，以充分发挥复式钢管混凝土柱的优越性能。The existing joints of composite CFST columns-steel beams are all welded joints, and the failure mode is local failure in the beam end weld connection area, which fails to give full play to the mechanical properties of composite CFST columns. The welded joints of concrete filled steel tube columns and steel beams are prone to brittle failure due to tearing of the weld seam of the lower flange of the steel beam under earthquake loads, and the seismic performance of the combined joints cannot be effectively exerted. Therefore, it is urgent to improve the structural form of the joints of the composite CFST columns based on the research, and increase the strength and deformation capacity of the beam-column connection area, so as to give full play to the superior performance of the composite CFST columns.
发明内容Contents of the invention
为解决以上问题，本发明提供一种复式钢管混凝土柱与钢梁连接节点及其制作方法，该连接节点为上焊下栓式，钢梁上翼缘与上外环板之间采用焊缝连接，钢筋混凝土楼板可有效保护连接焊缝不至于发生撕裂破坏；钢梁下翼缘与下外环板之间采用螺栓连接，增强了组合节点在地震荷载作用下的变形能力；其制作方法简单，易操作实施。In order to solve the above problems, the present invention provides a connection node between a composite steel pipe concrete column and a steel beam and a manufacturing method thereof. The concrete floor slab can effectively protect the connection welds from tearing and damage; the bolt connection between the lower flange of the steel beam and the lower outer ring plate enhances the deformation capacity of the combined joint under the earthquake load; its manufacturing method is simple and easy Operation implementation.
为了达到上述目的，本发明采用以下技术方案予以解决。In order to achieve the above object, the present invention adopts the following technical solutions.
(一)一种复式钢管混凝土柱与钢梁连接节点，包括：内钢管、外钢管、锚固板和钢梁；其中，所述内钢管外套设有外钢管，所述外钢管的侧壁上分别连接有钢梁；所述内钢管的侧壁上均匀设置有多个锚固板，所述外钢管上设置有与所述锚固板相匹配的卡槽，所述锚固板穿过所述卡槽并伸出所述外钢管外；所述锚固板的伸出端与所述钢梁的腹板通过第一固定机构连接。(1) A connection node between a composite steel pipe concrete column and a steel beam, comprising: an inner steel pipe, an outer steel pipe, an anchor plate and a steel beam; A steel beam is connected; a plurality of anchor plates are uniformly arranged on the side wall of the inner steel pipe, and a slot matching the anchor plate is arranged on the outer steel tube, and the anchor plate passes through the slot and protruding out of the outer steel pipe; the protruding end of the anchor plate is connected to the web of the steel beam through a first fixing mechanism.
优选的，还包括上外环板和下外环板；其中，所述上外环板和下外环板分别设置于所述外钢管的侧壁的上端和下端；所述上外环板与所述钢梁的上翼缘采用四角焊缝连接，所述下外环板与所述钢梁的下翼缘通过第二固定机构连接。Preferably, it also includes an upper outer ring plate and a lower outer ring plate; wherein, the upper outer ring plate and the lower outer ring plate are respectively arranged on the upper end and the lower end of the side wall of the outer steel pipe; the upper outer ring plate and the lower outer ring plate The upper flange of the steel beam is connected by four corner welds, and the lower outer ring plate is connected with the lower flange of the steel beam through a second fixing mechanism.
优选的，所述第一固定机构包含第一固定孔、第一螺栓和第一螺母；所述锚固板的伸出端与所述钢梁的腹板上设置有相对应的第一固定孔，所述第一固定孔内装配有第一螺栓，所述第一螺栓依次穿过所述锚固板的伸出端和所述钢梁的腹板上的第一固定孔并通过第一螺母固定。Preferably, the first fixing mechanism includes a first fixing hole, a first bolt and a first nut; the protruding end of the anchor plate is provided with a corresponding first fixing hole on the web of the steel beam, A first bolt is installed in the first fixing hole, and the first bolt passes through the protruding end of the anchor plate and the first fixing hole on the web plate of the steel beam in sequence and is fixed by a first nut.
优选的，所述第二固定机构包含第二固定孔、第二螺栓和第二螺母；所述下外环板与所述钢梁的下翼缘上设置有相对应的第二固定孔，所述第二固定孔内装配有第二螺栓，所述第二螺栓依次穿过所述下外环板与所述钢梁的下翼缘上的第二固定孔并通过第二螺母固定。Preferably, the second fixing mechanism includes a second fixing hole, a second bolt and a second nut; the lower outer ring plate and the lower flange of the steel beam are provided with corresponding second fixing holes, so A second bolt is installed in the second fixing hole, and the second bolt passes through the second fixing hole on the lower outer ring plate and the lower flange of the steel beam in turn and is fixed by a second nut.
优选的，所述内钢管与所述锚固板焊接。Preferably, the inner steel pipe is welded to the anchor plate.
优选的，所述上外环板和下外环板分别与所述外钢管的侧壁焊接。Preferably, the upper outer ring plate and the lower outer ring plate are respectively welded to the side walls of the outer steel pipe.
优选的，所述内钢管为圆形钢管，所述外钢管为方形钢管；所述圆形钢管与所述方形钢管的中心线共线。Preferably, the inner steel pipe is a circular steel pipe, and the outer steel pipe is a square steel pipe; the centerline of the circular steel pipe and the square steel pipe is collinear.
(二)一种复式钢管混凝土柱与钢梁连接节点的制作方法，包括以下步骤：(2) A method for making a composite steel pipe concrete column and a steel beam connection node, comprising the following steps:
步骤1，将锚固板均匀焊接在所述内钢管的侧壁上，在外钢管的侧壁上开设与锚固板相匹配的卡槽，锚固板穿过所述卡槽并伸出所述外钢管外；Step 1, the anchor plate is uniformly welded on the side wall of the inner steel pipe, and the side wall of the outer steel pipe is provided with a slot matching the anchor plate, and the anchor plate passes through the slot and extends out of the outer steel tube. ;
步骤2，在外钢管的侧壁上分别安装钢梁，钢梁的腹板与锚固板的伸出端通过第一固定机构连接；Step 2, respectively installing steel beams on the side walls of the outer steel pipes, the webs of the steel beams are connected to the protruding ends of the anchor plates through the first fixing mechanism;
步骤3，在外钢管的侧壁上端和下端分别焊接上外环板和下外环板；所述上外环板与所述钢梁的上翼缘采用四角焊缝连接，所述下外环板与所述钢梁的下翼缘通过第二固定机构连接，即得复式钢管混凝土柱与钢梁连接节点。Step 3, welding the upper outer ring plate and the lower outer ring plate respectively at the upper end and the lower end of the side wall of the outer steel pipe; the upper outer ring plate is connected with the upper flange of the steel beam by four corner welds, It is connected with the lower flange of the steel beam through the second fixing mechanism, so as to obtain the connection node between the composite steel pipe concrete column and the steel beam.
与现有技术相比，本发明的有益效果为：Compared with prior art, the beneficial effect of the present invention is:
本发明所得的复式钢管混凝土柱与钢梁连接节点为上焊下栓式连接节点，更好的发挥内钢管与外钢管的协同工作性能；即钢梁上翼缘与上外环板之间采用焊缝连接，钢筋混凝土楼板可有效保护连接焊缝不至于发生撕裂破坏；钢梁下翼缘与下外环板之间采用螺栓连接，以增强组合节点在地震荷载作用下的变形能力，提高了梁柱连接区域的强度和变形能力，充分发挥复式钢管混凝土柱的优越性能。The connection node between the compound steel pipe concrete column and the steel beam obtained in the present invention is a connection node of upper welding and lower bolt type, which better exerts the cooperative work performance of the inner steel pipe and the outer steel pipe; that is, the weld seam is used between the upper flange of the steel beam and the upper outer ring plate The reinforced concrete floor slab can effectively protect the connection welds from tearing and damage; the lower flange of the steel beam and the lower outer ring plate are connected by bolts to enhance the deformation capacity of the combined joint under the earthquake load and improve the beam The strength and deformation capacity of the column connection area can fully exert the superior performance of the composite steel pipe concrete column.
附图说明Description of drawings
下面结合附图和具体实施例对本发明做进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
图1为不同的复式钢管混凝土柱截面图；其中，图(a)为内圆外圆复式钢管混凝土柱截面图，图(b)为内圆外方复式钢管混凝土柱截面图；Figure 1 is a cross-sectional view of different compound concrete-filled steel pipe columns; wherein, figure (a) is a cross-sectional view of an inner-circle and outer-circle compound steel-filled concrete column, and figure (b) is a cross-sectional view of an inner-circle and outer-square compound steel pipe concrete column;
图2是本发明的复式钢管混凝土柱与钢梁连接节点的结构示意图。Fig. 2 is a structural schematic diagram of the connection node between the composite steel pipe concrete column and the steel beam of the present invention.
在以上图中：1内钢管；2外钢管；3锚固板；4钢梁；401上翼缘；402腹板；403下翼缘；5第一固定机构；6上外环板；7下外环板；8第二固定机构。In the above figure: 1 inner steel pipe; 2 outer steel pipe; 3 anchor plate; 4 steel beam; 401 upper flange; 402 web; 403 lower flange; Ring plate; 8 second fixing mechanism.
具体实施方式Detailed ways
参考图2，根据本发明的内容的实施例所提出的一种复式钢管混凝土柱与钢梁4连接节点，包括：内钢管1、外钢管2、锚固板3、钢梁4、上外环板6和下外环板7。其中，内钢管1外套设有外钢管2，内钢管1为圆形钢管，外钢管2为方形钢管，内钢管1和外钢管2构成内圆外方的复式钢管混凝土柱。Referring to Fig. 2, a compound steel pipe concrete column and steel beam 4 connection node proposed according to an embodiment of the content of the present invention includes: an inner steel pipe 1, an outer steel pipe 2, an anchor plate 3, a steel beam 4, and an upper outer ring plate 6 and the lower outer ring plate 7. Wherein, the inner steel pipe 1 is covered with an outer steel pipe 2, the inner steel pipe 1 is a circular steel pipe, the outer steel pipe 2 is a square steel pipe, and the inner steel pipe 1 and the outer steel pipe 2 form a composite steel pipe concrete column with an inner circle and an outer square.
内钢管1的侧壁上均匀焊接有四个锚固板3，外钢管2上设置有与锚固板3相匹配的卡槽，四个锚固板3分别穿过卡槽并伸出外钢管2外。外钢管2的侧壁上分别连接有四个钢梁4；锚固板3的伸出端与钢梁4的腹板402之间开设有对用的第一固定孔，通过第一固定孔内装配的第一螺栓将锚固板3和钢梁4的腹板402固定连接。Four anchor plates 3 are uniformly welded on the side wall of the inner steel pipe 1, and the outer steel pipe 2 is provided with a slot matching the anchor plate 3, and the four anchor plates 3 respectively pass through the slot and protrude outside the outer steel tube 2. Four steel beams 4 are respectively connected to the side walls of the outer steel pipe 2; a pair of first fixing holes are provided between the protruding end of the anchor plate 3 and the web 402 of the steel beam 4, through which the first fixing holes are assembled The anchor plate 3 and the web plate 402 of the steel beam 4 are fixedly connected by the first bolt.
外钢管2的上端和下端分别焊接有上外环板6和下外环板7，上外环板6的位置对应钢梁4的上翼缘401，上外环板6与钢梁4的上翼缘401采用四角焊缝连接。下外环板7的位置对应钢梁4的下翼缘403，下外环板7与钢梁4的下翼缘403之间对应开设有第二固定孔，通过第二固定孔内装配的第二螺栓将下外环板7与钢梁4的下翼缘403固定连接。上翼缘401与上外环板6的连接区域、以及下翼缘403与下外环板7的连接区域增大了钢板的厚度与面积，该构造方式增强了梁柱节点连接处的抗弯刚度；且上外环板6和下外环板7分别焊接在外钢管2的侧壁上，更有利于将复式钢管混凝土柱的柱端荷载传至钢梁4的两端。The upper end and the lower end of the outer steel pipe 2 are respectively welded with an upper outer ring plate 6 and a lower outer ring plate 7, the position of the upper outer ring plate 6 corresponds to the upper flange 401 of the steel beam 4, and the upper outer ring plate 6 and the upper The flange 401 is connected by four corner welds. The position of the lower outer ring plate 7 corresponds to the lower flange 403 of the steel beam 4, and a second fixing hole is correspondingly opened between the lower outer ring plate 7 and the lower flange 403 of the steel beam 4, and the second fixing hole assembled through the second fixing hole The lower outer ring plate 7 is fixedly connected with the lower flange 403 of the steel beam 4 by two bolts. The connection area between the upper flange 401 and the upper outer ring plate 6, and the connection area between the lower flange 403 and the lower outer ring plate 7 increase the thickness and area of the steel plate, and this structural method enhances the bending resistance of the beam-column joint connection rigidity; and the upper outer ring plate 6 and the lower outer ring plate 7 are respectively welded on the side wall of the outer steel pipe 2, which is more conducive to transmitting the end load of the composite steel pipe concrete column to the two ends of the steel beam 4.
上述复式钢管混凝土柱与钢梁4连接节点的制作方法，包括以下步骤：The manufacturing method of the above-mentioned composite steel pipe concrete column and steel beam 4 connection nodes comprises the following steps:
步骤1，将锚固板3均匀焊接在内圆形钢管的侧壁上，在外方形钢管的侧壁上开设与锚固板3相匹配的卡槽，锚固板3穿过卡槽并伸出外钢管2外。Step 1, evenly weld the anchor plate 3 on the side wall of the inner circular steel pipe, and open a slot matching the anchor plate 3 on the side wall of the outer square steel tube, and the anchor plate 3 passes through the slot and extends out of the outer steel tube 2 .
步骤2，在外钢管2的侧壁上分别安装钢梁4，钢梁4的腹板402与锚固板3的伸出端对应开设第一固定孔，第一螺栓分别穿过钢梁4的腹板402与锚固板3的伸出端的第一固定孔并通过第一螺母固定，进而将锚固板3与钢梁4腹板402固定。Step 2, install steel beams 4 on the side walls of the outer steel pipe 2, the webs 402 of the steel beams 4 correspond to the protruding ends of the anchor plates 3, and open first fixing holes, and the first bolts respectively pass through the webs of the steel beams 4 402 is fixed to the first fixing hole at the protruding end of the anchor plate 3 through the first nut, and then the anchor plate 3 is fixed to the web 402 of the steel beam 4 .
步骤3，在外钢管2的侧壁上端和下端分别焊接上外环板6和下外环板7，上外环板6和下外环板7的位置分别对应钢梁4的上翼缘401和下翼缘403。上外环板6与钢梁4的上翼缘401采用四角焊缝连接。下外环板7与钢梁4的下翼缘403对应开设第二固定孔，第二螺栓依次穿过下外环板7与钢梁4的下翼缘403的第二固定孔，并通过第二螺母固定，进而将钢梁4分别与上外环板6和下外环板7固定连接，即得上焊下栓复式钢管混凝土柱与钢梁4连接节点。Step 3, weld the upper outer ring plate 6 and the lower outer ring plate 7 on the upper end and lower end of the side wall of the outer steel pipe 2 respectively, and the positions of the upper outer ring plate 6 and the lower outer ring plate 7 correspond to the upper flange 401 and the upper flange 401 of the steel beam 4 respectively. Lower flange 403 . The upper outer ring plate 6 and the upper flange 401 of the steel beam 4 are connected by four corner welds. The lower outer ring plate 7 and the lower flange 403 of the steel beam 4 correspond to a second fixing hole, and the second bolts pass through the second fixing holes of the lower outer ring plate 7 and the lower flange 403 of the steel beam 4 in turn, and pass through the second fixing hole of the lower outer ring plate 7 and the lower flange 403 of the steel beam 4 Two nuts are fixed, and then the steel beam 4 is fixedly connected with the upper outer ring plate 6 and the lower outer ring plate 7 respectively, that is, the connection node between the upper welded lower bolt composite steel pipe concrete column and the steel beam 4 is obtained.
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些改动和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.
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| CN110847615A (en) * | 2019-11-09 | 2020-02-28 | 江苏南通三建集团股份有限公司 | High-stability steel column mounting structure and process thereof |
| CN110863569A (en) * | 2019-09-25 | 2020-03-06 | 北京工业大学 | Sliding type compound steel pipe concrete column-beam joint and column-column connecting system |
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| CN111042332A (en) * | 2019-11-26 | 2020-04-21 | 北京工业大学 | A composite steel tube concrete column beam column joint and column-column inner steel tube flange connection system |
| CN111255071A (en) * | 2020-01-22 | 2020-06-09 | 青岛理工大学 | Clamping groove type steel-wood combined node and mounting method |
| CN113585467A (en) * | 2021-08-09 | 2021-11-02 | 南通欧本建筑科技有限公司 | Connection structure of crust roof beam and all kinds of steel columns |
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| CN118621906A (en) * | 2024-04-26 | 2024-09-10 | 北京工业大学 | An assembled steel tube concrete column-partially covered steel concrete composite beam frame and assembly method |
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| CN110984376B (en) * | 2019-12-17 | 2020-11-06 | 山西大学 | A hinged steel structure node |
| CN111255071B (en) * | 2020-01-22 | 2021-03-05 | 青岛理工大学 | Clamping groove type steel-wood combined node and mounting method |
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Application publication date: 20190830 |