Summary of the invention
The object of the present invention is to provide a kind of steel pipe column-H-shaped beam connecting node of reinforcing, solve steel framed structure demand to ductility of joint and supporting capacity in collapsing procedure.
To achieve these goals, solution of the present invention is:
A kind of steel pipe column-H-shaped beam connecting node of reinforcing, described steel pipe column-H-shaped beam connecting node comprises steel pipe column, be positioned at the H-shaped girder steel of the described steel pipe column left and right sides, be parallel to the connection web that bottom flange on described H-shaped girder steel is arranged at the upper spacer of the upper and lower both sides of described steel pipe column and lower clapboard and is arranged between described upper spacer and lower clapboard respectively, the web of described H-shaped girder steel is connected with the described web that is connected, the top flange of described H-shaped girder steel, lower flange of girder edge respectively with described upper spacer, lower clapboard is connected, before and after described two groups of lower flange of girder edge, dual-side is respectively equipped with two groups of lower flange of girder edge stiffeners, described two groups of lower flange of girder edge stiffeners are positioned at described lower flange of girder edge near described lower clapboard place end, and two groups of lower flange of girder edge stiffeners are symmetrical arranged about described web,
The front and back bilateral symmetry of described lower clapboard is provided with four groups of lower clapboard stiffeners, and described four groups of lower clapboard stiffeners are arranged near the junction of described lower clapboard and described two groups of lower flange of girder edge, and one group is positioned at the left and right end positions of described lower clapboard between two;
The below of described lower flange of girder edge and lower clapboard two junction is respectively equipped with cover plate, and described cover plate is connected with described lower flange of girder edge, lower clapboard respectively.
Preferably, described each lower flange of girder edge has at least two row's bolts hole along beam span direction, described at least two arrange spiro keyhole positions in described lower flange of girder edge near end place, described lower clapboard place, the number of often arranging bolt hole is even number and described even number bolt hole is symmetrical arranged about described web, and described cover plate is connected via connecting bolt with described lower flange of girder edge.
Preferably, the two ends corresponding described lower flange of girder edge of described lower clapboard near described junction has at least two row's bolts hole, the number of often arranging bolt hole is even number and described even number bolt hole is symmetrical arranged about described web, and described cover plate is connected via connecting bolt with described lower clapboard.
Preferably, described each cover plate is opened oval bolt hole and can be slided along Long Circle bolt hole to make described connecting bolt along beam span direction in connecting bolt position.
Further, described each cover plate is greater than at least two of cover plate two ends respectively away from the tensile bearing capacity in the cross section, Liang Pai bolt hole center line place of described lower flange of girder edge and lower clapboard two junction and arranges bolt hole pressure-bearing bearing capacity sum.
Described connecting bolt is C level plain bolt, the aperture 1.0 ~ 1.5mm larger than the nominal diameter of connecting bolt of described bolt hole.
The shear-carrying capacity of described connecting bolt screw rod is greater than the hole wall carrying bearing capacity of its place bolt hole.
Preferably, four groups of lower flange of girder edge stiffeners are trapezium structure, two summits of described ladder beam bottom flange stiffener upper bottom surface are arranged the line of centres of bolt hole and lower flange of girder edge with lower flange of girder edge near one of lower clapboard respectively and to be alignd away from the line of centres arranging bolt hole of lower clapboard and arrange, and the height of ladder beam bottom flange stiffener is not less than the diameter of bolt hole of lower flange of girder edge; Described row cross section, a bolt hole center's line place tensile bearing capacity away from lower clapboard is greater than whole bolt hole Corner cracks bearing capacity sum on described lower flange of girder edge.
Preferably, four groups of lower clapboard stiffeners are triangular structure, align with the line of centres arranging bolt hole of lower clapboard near lower flange of girder edge place and arrange in the summit of described triangle lower clapboard stiffener, and described lower clapboard is greater than does not arrange lower flange of girder edge stiffener and the section area not offering the lower flange of girder edge of bolt hole at the section area of lower clapboard near a row bolt hole place at lower flange of girder edge place; Two ends, described lower clapboard left and right are greater than on lower clapboard away from cross section, the Liang Pai bolt hole center line place tensile bearing capacity of lower flange of girder edge often holds at least two row's bolt hole Corner cracks bearing capacity sums.
Owing to adopting such scheme, the invention has the beneficial effects as follows:
Steel pipe column-H-shaped the beam connecting node of illustrated a kind of reinforcing, it is on the basis that steel pipe column-H-shaped beam has been fixedly connected with, arrange stiffener respectively in the join domain both sides of lower flange of girder edge place and lower clapboard to strengthen steel framed structure bean column node lower flange of girder edge and lower clapboard join domain, namely by arranging lower flange of girder edge stiffener and lower clapboard stiffener is reinforced steel frame beam column joint, in addition, lower flange of girder edge and lower clapboard adopt connecting bolt and cover plate reinforcement by connection again, ductility and the supporting capacity of node can be significantly improved, especially the vertical bearing capacity of square column inefficacy posterior nodal point minor structure under node is improved, the anti-Progressive Collapse performance of structure is significantly improved, can be used for the strengthening reconstruction of important building.
Detailed description of the invention
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further illustrated.
As shown in Figure 1 to Figure 3, a kind of steel pipe column-H-shaped beam connecting node of reinforcing, comprise steel pipe column-H-shaped beam connecting node and bracing means disposed thereon, in the present embodiment, steel pipe column-H-shaped beam connecting node comprises steel pipe column, be positioned at the H-shaped girder steel of the steel pipe column left and right sides, be parallel to the connection web that bottom flange on described H-shaped girder steel is arranged at the upper spacer of the upper and lower both sides of described steel pipe column and lower clapboard 5 and is arranged between upper spacer and lower clapboard 5 respectively, steel pipe column adopts full penetration weld all around to be connected with upper lower clapboard, connect web to be welded on, between lower clapboard, and with the post jamb of steel pipe column by being weldingly connected, the web of H-shaped girder steel be connected web and adopt high-strength bolt to be connected with shear plate respectively, the top flange of H-shaped girder steel, lower flange of girder edge 6 respectively with upper spacer, lower clapboard 5 is welded to connect, bracing means is made up of lower flange of girder edge stiffener 1, lower clapboard stiffener 2, cover plate 3 and multiple connecting bolt 4.
As shown in Figure 1, cover plate 3 is arranged on the below of lower flange of girder edge 6 and lower clapboard 5, and lower flange of girder edge 6 and junction, lower clapboard 5 liang place are transferred and be respectively equipped with a cover plate 3.On lower flange of girder edge 6, lower clapboard 5 and cover plate 3, correspondence has bolt hole, and cover plate 3 is connected via connecting bolt with lower flange of girder edge 6, lower clapboard 5.
Each lower flange of girder edge 6 has at least two row's bolts hole along beam span direction, at least two arrange spiro keyhole positions in lower flange of girder edge 6 near end place, lower clapboard 5 place, the number of often arranging bolt hole is even number and even number bolt hole is symmetrical arranged about web, and cover plate is connected via connecting bolt 4 with lower flange of girder edge, lower clapboard.In the present embodiment, as shown in Figure 4, each lower flange of girder edge 6 is connected via four groups of symmetrically arranged connecting bolts 4 with between cover plate 3, and four groups of connecting bolts 4 are arranged near the junction of lower flange of girder edge 6 with lower clapboard 5, and four groups of connecting bolts 4 are arranged on lower flange of girder edge 6 side between two.
The two ends corresponding lower flange of girder edge 6 of lower clapboard 5 near junction has at least two row's bolts hole, and the number of often arranging bolt hole is even number and even number bolt hole is symmetrical arranged about web.In the present embodiment, as shown in Figure 5, lower clapboard 5 is connected via four groups of symmetrically arranged connecting bolts 4 with between each cover plate 3, lower clapboard 5 is arranged altogether eight groups of connecting bolts 4.
Above-mentioned connecting bolt 4 is C level plain bolt, the aperture of the bolt hole on lower clapboard 5, lower flange of girder edge 6 meets the requirement of " Code for design of steel structures " (GB50017-2003), 1.0 ~ 1.5mm larger than the nominal diameter of connecting bolt 4, the allowable distance of bolt hole also meets the requirement of " Code for design of steel structures " (GB50017-2003); The hole wall carrying bearing capacity that the shear-carrying capacity of connecting bolt 4 screw rod is greater than its place bolt hole makes connecting bolt 4 that screw rod shearing not occur to destroy.
Described each cover plate 3 is opened oval bolt hole and can be slided along Long Circle bolt hole to make described connecting bolt along beam span direction in connecting bolt position.Namely, on each cover plate 3, cover plate 3 two ends place is respectively equipped with at least two platoon leader's circle bolts hole, thus makes, between cover plate 3 and lower flange of girder edge 6, to be connected respectively between cover plate 3 with lower clapboard 5 via connecting bolt 4.Meanwhile, each cover plate is greater than at least two of cover plate two ends away from lower flange of girder edge 6 respectively with the tensile bearing capacity in Liang Pai bolt hole center (namely bolt hole 7 is arranged in the inner side two) cross section, line place of lower clapboard 5 liang of junctions and arranges bolt hole pressure-bearing bearing capacity sum.Cover plate 3 opens oval bolt hole in corresponding connecting bolt 4 position along beam span direction, make connecting bolt 4 can at Long Circle bolt hole slip certain distance, thus make cover plate 3 be welded to connect the position front shroud 3 that rupture at lower clapboard 5 and lower flange of girder edge 6 substantially not stress, and be welded to connect position at lower clapboard 5 and lower flange of girder edge 6 and rupture back shroud 3 by both connecting bolt 4 generals drawknots.
In the present embodiment, as shown in Figure 6, on each cover plate 3, two rows arranged by connecting bolt 4, bolt hole is opened in the position arranging bolt at lower flange of girder edge 6 and lower clapboard 5, the spacing of bolt hole is 80mm, to being 60mm along force direction Member Lip distance, meets the requirement of " Code for design of steel structures " (GB50017-2003).The aperture of bolt hole is 25.5mm, 1.5mm larger than the nominal diameter of connecting bolt, arrange that Long Circle bolt hole is opened in the position of bolt at cover plate 3, bolt hole is made up of the rectangle of two diameters to be the semicircle of 25.5mm and width be 25.5mm, wherein, each bolt hole aligns near the semicircle center of circle of inner side and bolt-center, and the rectangle length that bolt hole 7 is arranged in inner side two is 10mm, and the rectangle length that bolt hole 8 is arranged in outside two is 13mm.Cover plate width is 250mm, and cover plate each cross section tensile bearing capacity is greater than four bolt hole pressure-bearing bearing capacity sums of its every side.According to bolt hole Corner cracks bearing capacity, choose 8.8 grades of M24 connecting bolts 4 and be connected with cover plate 3 respectively with lower clapboard 5 by lower flange of girder edge 6, connecting bolt 4 is common C grade bolt, and the shear-carrying capacity of connecting bolt is all greater than its place bolt hole Corner cracks bearing capacity.
During owing to collapsing, the top of steel pipe column-H-shaped beam connecting node is stressed based on pressure, and bottom is stressed based on pulling force, therefore in the steel pipe column of illustrated reinforcing-H-shaped beam connecting node, as Fig. 1, shown in Fig. 3 and Fig. 4, before and after each lower flange of girder edge 6, (i.e. beam span direction) dual-side is symmetrically welded two groups of lower flange of girder edge stiffeners 1 and strengthens, two groups of lower flange of girder edge stiffeners 1 are welded on lower flange of girder listrium 6, be positioned at lower flange of girder edge 6 near lower clapboard 5 place end, and on each lower flange of girder edge 6, two groups of lower flange of girder edge stiffeners 1 are symmetrical arranged about web.
Four groups of lower flange of girder edge stiffeners equal 1 are trapezium structure, two summits of ladder beam bottom flange stiffener 1 upper bottom surface are arranged the line of centres of bolt hole and lower flange of girder edge 6 with lower flange of girder edge 6 near one of lower clapboard 5 respectively and to be alignd away from the line of centres arranging bolt hole of lower clapboard 5 and arrange, and the height of ladder beam bottom flange stiffener 6 is not less than the diameter of bolt hole of lower flange of girder edge 6, meanwhile, row cross section, the bolt hole center's line place tensile bearing capacity away from lower clapboard 5 is greater than whole bolt hole Corner cracks bearing capacity sum on lower flange of girder edge 6.
In the present embodiment, four groups of lower flange of girder edge stiffeners 1 are trapezium structure, to align away from the line of centres of two bolts hole of lower clapboard 5 near the line of centres of two bolts hole of lower clapboard 5 and lower flange of girder edge 6 with lower flange of girder edge 6 respectively and arrange in two summits of ladder beam bottom flange stiffener upper bottom surface, and the height of ladder beam bottom flange stiffener is not less than the diameter of bolt hole of lower flange of girder edge 6, , thus after ensureing welded flange stiffener 1, the tensile bearing capacity in the line of centres of lower flange of girder edge 6 near two bolts hole of lower clapboard 5 and the cross section, Liang Ge bolt hole center line place away from lower clapboard 5 is not less than other cross section tensile bearing capacity of lower flange of girder edge 6.Simultaneously, the lower flange of girder edge 6 of welded flange stiffener 1 is greater than 4 bolt hole Corner cracks bearing capacity sums on lower flange of girder edge 6 away from two cross section, bolt hole center's line place tensile bearing capacity of lower clapboard, makes the lower flange of girder edge 6 of welded flange stiffener 1 that bolt hole Corner cracks preferentially occur and destroys.
As shown in Fig. 1, Fig. 3 and Fig. 5, the front and back bilateral symmetry of lower clapboard 5 is welded four groups of lower clapboard stiffeners 2 and is strengthened, and four groups of lower clapboard stiffeners 2 are arranged near two junctions of lower clapboard 5 with lower flange of girder edge 6, and one group is positioned at the two ends, left and right of lower clapboard 5 between two.
Four groups of lower clapboard stiffeners 2 are triangular structure, align with the line of centres arranging bolt hole of lower clapboard 5 near lower flange of girder edge 6 place and arrange in the summit of triangle lower clapboard stiffener 2, and lower clapboard 5 is greater than does not arrange lower flange of girder edge stiffener and the section area not offering the lower flange of girder edge of bolt hole at the section area of lower clapboard near a row bolt hole place at lower flange of girder edge place; Lower clapboard about 5 two ends are greater than on lower clapboard 5 away from cross section, the Liang Pai bolt hole center line place tensile bearing capacity of lower flange of girder edge often holds at least two row's bolt hole Corner cracks bearing capacity sums.
In the present embodiment, the summit of triangle lower clapboard stiffener and lower clapboard 5 align near the line of centres of two bolts hole at lower flange of girder edge 6 place and arrange, and the lower clapboard 5 after lower clapboard stiffener 2 is set is greater than the section area of former lower flange of girder edge at the section area at this row bolt hole place, thus after ensureing welding diaphragm stiffener 2, lower clapboard 5 is former lower flange of girder edge 6 each cross section tensile bearing capacity when cross section, the Liang Ge bolt hole center line place tensile bearing capacity at lower flange of girder edge place is not less than unguyed.Simultaneously, the every side of the lower clapboard 5 of welding diaphragm stiffener 2 is greater than lower clapboard 5 every four, side bolt hole Corner cracks bearing capacity sum away from cross section, the Liang Ge bolt hole center line place tensile bearing capacity of lower flange of girder edge, makes the lower clapboard 5 of welding diaphragm stiffener 2 that bolt hole Corner cracks preferentially occur and destroys.Specifically, the lower clapboard after welding diaphragm stiffener 2 is at the section area 1432mm at this row bolt hole place
2be not less than unguyed lower flange of girder edge section area 1200mm
2, and cross section, the lower clapboard 5 bolt hole center's line place tensile bearing capacity of welding diaphragm stiffener 2 is greater than lower clapboard 5 every four, side bolt hole Corner cracks bearing capacity sum.
Above-mentioned is can understand and apply the invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.