CN106049670A - Embedded type steel truss system - Google Patents
Embedded type steel truss system Download PDFInfo
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- CN106049670A CN106049670A CN201610394483.7A CN201610394483A CN106049670A CN 106049670 A CN106049670 A CN 106049670A CN 201610394483 A CN201610394483 A CN 201610394483A CN 106049670 A CN106049670 A CN 106049670A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 88
- 239000010959 steel Substances 0.000 title claims abstract description 88
- 239000004567 concrete Substances 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 8
- 239000003351 stiffener Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 230000003467 diminishing effect Effects 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 238000009408 flooring Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明公开了一种埋入式钢桁架体系,包括埋入式桁架和埋入式钢梁,所述埋入式桁架包括相互平行设置的上弦杆和下弦杆、垂直固定于上弦杆和下弦杆之间的直腹杆,以及两端分别固定于上弦杆或下弦杆与直腹杆连接处的斜腹杆;所述埋入式钢梁包括工字梁和焊接于工字梁腹板上的加劲肋;上弦杆的下翼缘上焊接焊钉,腹板上焊接有剪力件。本发明的受力更加合理,材料更加节约。将钢桁架和钢梁埋入转换板中,一方面可节约受弯体系占用楼层净高,另一方面利用混凝土板的受压性能达到节约材料的目的。
The invention discloses an embedded steel truss system, comprising an embedded truss and an embedded steel beam. The embedded truss includes an upper chord and a lower chord arranged parallel to each other and is vertically fixed to the upper chord and the lower chord. The straight web bar between them, and the oblique web bar whose two ends are respectively fixed at the connection between the upper chord or the lower chord and the straight web bar; the embedded steel beam includes the I-beam and the Stiffeners; welding studs are welded on the lower flange of the top chord, and shear members are welded on the web. The force of the present invention is more reasonable, and the material is more economical. Embedding steel trusses and steel beams in the transfer plate can save the floor height occupied by the bending system on the one hand, and save materials by utilizing the compressive performance of the concrete slab.
Description
技术领域technical field
本发明涉及固定建筑物,尤其是一种组合结构桁架。The invention relates to fixing buildings, especially a composite structure truss.
背景技术Background technique
在大型公共建筑中,随着楼层变化,柱网会发生改变,在楼层的某一层开始柱构件会比下层增多,该层被称为转换层。为承托上层的梁柱,转换层的楼面板一般才有厚板,厚度一般在1000mm以上,个别会达到3000mm。如在转换层采用常规的梁板体系,由于楼面荷载很大,梁的截面高度会相当大,影响转换层的楼层净高,并且材料使用过多,结构不合理。In large public buildings, as the floor changes, the column network will change. At a certain floor of the floor, there will be more column members than the lower floor. This floor is called the transfer floor. In order to support the beams and columns of the upper floor, the floor slabs of the transfer floor generally have thick slabs, the thickness of which is generally more than 1000mm, and some can reach 3000mm. If a conventional beam-slab system is used in the transfer floor, the cross-sectional height of the beam will be quite large due to the large floor load, which will affect the net floor height of the transfer floor, and the use of too many materials will make the structure unreasonable.
发明内容Contents of the invention
本发明的目的在于,提供一种埋入式钢桁架体系,以解决现有技术存在的上述问题。The object of the present invention is to provide an embedded steel truss system to solve the above-mentioned problems in the prior art.
本发明的核心内容是,一种埋入式钢桁架体系,包括埋入式桁架和埋入式钢梁,所述埋入式桁架包括相互平行设置的上弦杆和下弦杆、垂直固定于上弦杆和下弦杆之间的直腹杆,以及两端分别固定于上弦杆或下弦杆与直腹杆连接处的斜腹杆;所述埋入式钢梁包括工字梁和焊接于工字梁腹板上的加劲肋;上弦杆的下翼缘上焊接焊钉,腹板上焊接有剪力件。The core content of the present invention is an embedded steel truss system, including an embedded truss and an embedded steel beam, the embedded truss includes upper chords and lower chords arranged and the straight web bar between the lower chord, and the diagonal web bar whose two ends are respectively fixed at the connection between the upper chord or the lower chord and the straight web bar; the embedded steel beam includes an I-beam and a The stiffener on the plate; welding studs are welded on the lower flange of the upper chord, and shear members are welded on the web.
优选的,所述下弦杆的为矩形钢管结构,负弯矩区填充有混凝土。所述直腹杆的内部填充有混凝土。所述直腹杆和斜腹杆的端部焊接有钢板。所述上弦杆的底部焊接有钢底座、钢底座设置有垂直向下和倾斜的钢套筒,所述直腹杆和斜腹杆固结于钢套筒上。Preferably, the bottom chord is a rectangular steel pipe structure, and the negative moment area is filled with concrete. The interior of the straight web bar is filled with concrete. Steel plates are welded at the ends of the straight web bar and the diagonal web bar. The bottom of the upper chord is welded with a steel base, and the steel base is provided with a vertically downward and inclined steel sleeve, and the straight web and diagonal web are fixed on the steel sleeve.
优选的,所述上弦杆的上翼缘埋于楼面板的混凝土中,以重量份数计,楼面板及下弦杆和直腹杆内的混凝土包括如下组分:水泥380-420,中砂500-700,玻璃纤维15-25,水180-200,粗骨料800-1000,粉煤灰20-40,减水增效剂3-5。Preferably, the upper flange of the upper chord is buried in the concrete of the floor slab, and the concrete in the floor slab, the lower chord and the straight web includes the following components in parts by weight: cement 380-420, medium sand 500 -700, glass fiber 15-25, water 180-200, coarse aggregate 800-1000, fly ash 20-40, water reducing synergist 3-5.
优选的,所述减水增效剂的结构式为:Preferably, the structural formula of the water reducing synergist is:
式中,a:b:c=1:1.2:1,n为45~50,m为45~50,d为50~80。In the formula, a:b:c=1:1.2:1, n is 45-50, m is 45-50, and d is 50-80.
本发明的工作原理和优点是:在转换层使用钢桁架和钢梁体系代替传统的梁板体系,会使结构受力更加合理,材料更加节约。将钢桁架和钢梁埋入转换板中,一方面可节约受弯体系占用楼层净高,另一方面利用混凝土板的受压性能达到节约材料的目的。The working principle and advantages of the present invention are: the steel truss and steel beam system are used to replace the traditional beam-slab system in the transfer layer, which will make the structural force more reasonable and save materials. Embedding the steel trusses and steel beams in the transfer plate can save the floor height occupied by the bending system on the one hand, and save materials by utilizing the compressive performance of the concrete slab.
附图说明Description of drawings
图1是本发明的平面布置图。Figure 1 is a plan view of the present invention.
图2是桁架的结构示意图。Figure 2 is a schematic structural view of the truss.
图3是上弦杆的截面图。Fig. 3 is a sectional view of the upper chord.
图4是钢梁的截面图。Figure 4 is a cross-sectional view of a steel beam.
图5是钢节点的结构示意图。Figure 5 is a structural schematic diagram of a steel node.
具体实施方式detailed description
如图1所示,所述埋入式钢桁架体系主要由埋入式桁架1和埋入式钢梁2等两部分组成。如图2和图3所示,埋入式桁架由上弦杆11、下弦杆12、直腹杆13和斜腹杆14组成。As shown in FIG. 1 , the embedded steel truss system is mainly composed of two parts: an embedded truss 1 and an embedded steel beam 2 . As shown in FIGS. 2 and 3 , the embedded truss is composed of an upper chord 11 , a lower chord 12 , a straight web 13 and a diagonal 14 .
上弦杆完全埋入到转换层屋面板的高强混凝土11h中,上弦杆由上翼缘11e、下翼缘11c、钢腹板11d、焊钉11a和剪力件11f构成。下翼缘上通过焊钉熔焊于钢底板11g,钢底板作为转换层楼面板浇筑时的底板,焊钉使得下翼缘与转换层楼面板紧密咬合,不发生粘结滑移。剪力件与上翼缘和钢腹板通过角焊缝连接,作用是防止上翼缘以及钢腹板与转换层楼面板发生粘结滑移。钢腹板底部开有洞口,使得预应力钢筋11b能够穿过。The upper chord is completely embedded in the high-strength concrete 11h of the roof panel of the transfer floor, and the upper chord is composed of an upper flange 11e, a lower flange 11c, a steel web 11d, a welding stud 11a and a shear member 11f. The lower flange is welded to the steel bottom plate 11g by welding studs, and the steel bottom plate is used as the bottom plate when the transfer floor slab is poured. The welding studs make the lower flange and the transfer floor slab tightly occluded, and no bond slippage occurs. The shear member is connected with the upper flange and the steel web through fillet welds to prevent the upper flange and the steel web from bonding and slipping with the transition floor slab. There is a hole at the bottom of the steel web so that the prestressed steel bars 11b can pass through.
下弦杆为矩形钢管结构,在负弯矩区填充混凝土,防止钢管受压屈曲,提高弦杆的承载能力。斜腹杆与直腹杆均为圆钢管结构,直腹杆内部填充混凝土以提高抗压能力。直腹杆、斜腹杆端部套有螺纹,两端焊有钢板以防止焊接中混凝土水分流失使混凝土劣化。The lower chord is a rectangular steel pipe structure, and concrete is filled in the negative bending moment area to prevent buckling of the steel pipe under compression and improve the bearing capacity of the chord. The oblique web and the straight web are both round steel pipe structures, and the interior of the straight web is filled with concrete to improve the compressive capacity. The ends of the straight and diagonal webs are covered with threads, and the two ends are welded with steel plates to prevent the concrete from deteriorating due to moisture loss during welding.
埋入式钢梁2为工字形截面,上翼缘和腹板全部埋入转换层楼面板的混凝土24中,下翼缘露出,位于底板21的下方。钢梁腹板上焊有加劲肋23用以提高钢梁与混凝土板的抗滑移性能。腹板在由钢筋25穿过的位置焊接钢筋套筒22,避免弯折钢筋,同时保证钢筋受力的连续性。The embedded steel beam 2 has an I-shaped cross-section, the upper flange and the web are all buried in the concrete 24 of the transfer floor slab, and the lower flange is exposed and located below the bottom plate 21 . Stiffeners 23 are welded on the web of the steel beam to improve the anti-slip performance of the steel beam and the concrete slab. The web is welded with the steel bar sleeve 22 at the position where the steel bar 25 passes through, so as to avoid bending the steel bar and ensure the continuity of the stress of the steel bar at the same time.
斜腹杆和直腹杆通过钢节点焊接在上弦杆和下弦杆上。钢节点由钢底座3和钢套筒4组成。钢底座为实心圆盘,焊接在上、下弦杆的翼缘上。钢套筒焊接在钢底座上,内套丝有螺纹,而口边缘20mm范围无螺纹。将直腹杆和斜腹杆旋紧后在无螺纹区域通过角焊缝连接。The diagonal and straight webs are welded to the upper and lower chords through steel nodes. The steel node consists of a steel base 3 and a steel sleeve 4 . The steel base is a solid disc welded to the flanges of the upper and lower chords. The steel sleeve is welded on the steel base, the inner sleeve has threads, and the edge of the mouth has no threads within 20mm. After tightening the straight web rod and the diagonal web rod, they are connected by fillet welds in the non-threaded area.
本发明的实施过程如下:在工厂内拼装埋入式钢桁架。将埋入式钢桁架吊装到指定位置,将桁架与支撑结构刚接。采用铰接的方式连接埋入式钢梁与埋入式钢桁架。在埋入式钢梁下翼缘与埋入式钢桁架上弦杆间铺设钢底板。钢底板与埋入式钢梁下翼缘通过角焊缝连接,与埋入式钢桁架上翼缘通过焊钉熔焊连接。以钢底板作为模板浇筑混凝土转换层楼面板,并合理养护。The implementation process of the present invention is as follows: the embedded steel truss is assembled in the factory. Lift the buried steel truss to the designated position, and rigidly connect the truss to the supporting structure. The embedded steel beams and embedded steel trusses are connected by hinged joints. A steel floor is laid between the lower flange of the embedded steel beam and the upper chord of the embedded steel truss. The steel bottom plate is connected with the lower flange of the embedded steel beam through fillet welds, and connected with the upper flange of the embedded steel truss through welding studs. The concrete transfer floor slab is poured with the steel bottom slab as a formwork and maintained properly.
在使用时,楼面板将荷载传递至埋入式钢梁,使埋入式钢梁受弯。钢梁下翼缘受拉,上翼缘与其附近区域的混凝土共同受拉。钢梁端部将剪力传递至埋入式桁架。正弯矩区桁架上弦杆与内部的混凝土共同受压,并且四周混凝土作为约束防止钢结构鼓曲,下弦杆钢管受拉;负弯矩区桁架上弦杆上、下翼缘及腹板受压,使上弦杆的受压能力能够完全发挥,下弦杆钢管与内部混凝土共同受压,钢管内混凝土作为钢管约束防止其鼓曲。In use, the floor slabs transfer loads to the embedded steel beams, causing the embedded steel beams to flex. The lower flange of the steel beam is in tension, and the upper flange and the concrete in its vicinity are in tension together. The steel beam ends transmit the shear forces to the embedded trusses. In the positive bending moment zone, the upper chord of the truss and the internal concrete are under common compression, and the surrounding concrete is used as a constraint to prevent the steel structure from buckling, and the steel pipes in the lower chord are under tension; in the negative bending moment zone, the upper and lower flanges and webs of the truss upper chord are under compression, The compression capacity of the upper chord can be fully exerted, the steel pipe of the lower chord is under pressure together with the internal concrete, and the concrete inside the steel pipe acts as a steel pipe constraint to prevent its buckling.
进一步的实施中,对混凝土的成分进行优化。以重量份数计,混凝土包括如下组分:水泥380-420,中砂500-700,玻璃纤维15-25,水180-200,粗骨料800-1000,粉煤灰20-40,减水增效剂3-5。In further implementation, the composition of concrete is optimized. In parts by weight, the concrete includes the following components: cement 380-420, medium sand 500-700, glass fiber 15-25, water 180-200, coarse aggregate 800-1000, fly ash 20-40, water reducing Synergists 3-5.
其中,所述减水增效剂的结构式为:Wherein, the structural formula of the water-reducing synergist is:
式中,a:b:c=1:1.2:1,n为45~50,m为45~50,d为50~80。In the formula, a:b:c=1:1.2:1, n is 45-50, m is 45-50, and d is 50-80.
实验1-8Experiment 1-8
注:对照组为采用普通减水剂的混凝土,其3d强度为130Mpa,28d强度为135Mpa。Note: The control group is concrete using ordinary water reducing agent, its 3d strength is 130Mpa, and its 28d strength is 135Mpa.
总之,在转换层使用钢桁架和钢梁体系代替传统的梁板体系,会时结构受力更加合理,材料更加节约。并且,将钢桁架和钢梁埋入转换板中,一方面可节约受弯体系占用楼层净高,另一方面利用混凝土板的受压性能达到节约材料的目的。In short, using steel truss and steel beam system instead of traditional beam-slab system in the transfer floor will make the structure more reasonable and save materials. Moreover, embedding the steel trusses and steel beams in the transfer slab can save the net floor height occupied by the bending system on the one hand, and on the other hand use the compressive performance of the concrete slab to save materials.
Claims (7)
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