CN1298946C - Steel-steel concrete fully prefabricated assembling structure - Google Patents

Steel-steel concrete fully prefabricated assembling structure Download PDF

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CN1298946C
CN1298946C CNB200310104198XA CN200310104198A CN1298946C CN 1298946 C CN1298946 C CN 1298946C CN B200310104198X A CNB200310104198X A CN B200310104198XA CN 200310104198 A CN200310104198 A CN 200310104198A CN 1298946 C CN1298946 C CN 1298946C
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steel
concrete
column
post
floor
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CN1554839A (en
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柏文峰
翟辉
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Kunming University of Science and Technology
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Abstract

The present invention relates to a fully prefabricated assembling structure of steel-reinforcing steel rib concrete, which comprises the following two assembling forms: a fully prefabricated assembling structure of column-steel and reinforcing steel rib concrete and a fully prefabricated assembling structure of prefabricated steel tube concrete column-steel and reinforcing steel rib concrete, wherein a prefabricated steel column comprises an H-shaped steel column, a concrete stiffening rib, a steel plate supporting plate of the concrete stiffening ribs, and a prestressing force shearing-friction type node matched with a shearing resistant strip; a junction node among the H-shaped steel column, a floor plate and an edge beam is provided with the concrete stiffening rib supported by the steel plate supporting plate; the position of a 'non plain joint' formed by the flange of the H-shaped steel column, the prefabricated floor plate and a prefabricated edge beam is provided with the shearing resistant strip; a prefabricated steel tube concrete column is formed by pouring high-strength microdilatancy concrete in a steel tube with a square cross section; and the outer wall of the steel tube of the prefabricated steel tube concrete column is provided with a shearing resistant strip to form a prestressing force shearing-friction type node. The present invention has the advantages of improvement of structure shock resistance and area utilization, further improvement of construction work efficiency, high fireproof performance, low cost and small member size. The structure is suitable for various building projects. Both of the two structure forms can disassemble and recycle structural members of the main body according to the original state by construction techniques to reduce building garbage, and therefore, the present invention provides an environment protective structure system.

Description

The fully-prefabricated assembled structure of steel-steel concrete
One, affiliated field:
The present invention relates to this industrialization structural system of the fully-prefabricated assembled structure of steel-steel concrete, belong to construction engineering technical field.
Two, background technology:
Steel concrete integrated prestress assembling slab column system is a kind of frame construction that is based upon on industrialization, the standardized production basis.This structural system comes from Former Yugoslavia, made referrals to China after the Tangshan Earthquake in 1977, but the proprietary technology that China does not carry out concrete engineering design and construction from Former Yugoslavia's acquisition, but the exploitation and the research of system have been carried out independently, achievement in research is separately won national science and technology progress third prize in 1985 and national science and technology progress second prize in 1987, the achievement in research of China is applied in the about 300,000 square metres building in tens big and medium-sized cities such as Beijing, Tangshan, Chengdu, and this system main feature and construction sequence are as follows:
1, the main member of this system is reinforced concrete prefabricated column, precast floor slab, prefabricated cushion block and prefabricated side bar;
2, prefabricated post does not have bracket (cap), leaves two dimension prestressing reinforcing bar duct in the superstructure height; According to structural configuration, prefabricated post and cushion block are located at the intersection of precast floor slab and precast floor slab, precast floor slab and prefabricated side bar, and the cushion block height is identical with prefabricated side bar, also leave two dimension prestressing reinforcing bar duct;
3, the right angle breach is left at the plate angle of precast floor slab, all contacts two sides with cushion block with post.The contact surface of plate and post and cushion block is the plane, need not cut a hole hair, does not also have teeth groove, and also no-reinforcing-bar stretches out or steel plate welds mutually.Stay 20 millimeters-30 millimeters spaces to fill out between two contact surfaces, form between plate and post and the cushion block " flushing joint " with early strong high grade micro-expansion cement mortar;
4, form open channel between adjacent two plates and between plate and the side bar, prestressed reinforcement is placed in the open channel, passes the reserving hole channel on post and the cushion block, and two ends are anchored at the pillar or the superstructure outside.Then whole superstructure is applied two-way horizontal prestressing force, promptly integrated prestress is squeezed into integral body with plates all in the superstructure plane, post, cushion block, side bar; Remove to support the interim support of floor at last, floor relies on the stiction of prestressing force and generation thereof to be supported and fixed on the post, between plate, side bar and the post, form prestressing force friction-type node between plate, side bar and the cushion block;
5, the open channel concrete is built in post hole and cushion block hole grouting, and prestressed reinforcement becomes the post-tensioning prestress with bond reinforcing bar;
6, the entire infrastructure construction is from bottom to top successively carried out.In order to resist the impact of horizontal loading, lateral resistant member such as shear wall should be set properly generally.
Yet in recent years, this structural system reduced gradually in actual application in engineering, traced it to its cause, and mainly had the problem of following several respects:
1, to lateral resistant member that requirement is set is tighter." integrated prestress assembling sheet-pile Building technology rules " clearly stipulate, " seismic fortification intensity is that 7,8 degree and seismic fortification intensity are that building on 6 degree, the IV class place soil should be established lateral resistant member such as shear wall in addition." this has just limited the range of application of this structural system greatly, is unfavorable for that it is building aseismicity the applying of highly seismic region of setting up defences.These rules are that 9 buildings of spending are not paid attention to seismic fortification intensity;
2, the model shock test that this structural system is carried out shows, when not establishing lateral resistant member such as shear wall, reinforced concrete prefabricated column is easy to cracking under Horizontal Seismic Load, cause the rigidity of structure to descend, sidesway strengthens, enclosed structure destroys, and Former Yugoslavia also gives this fully to prove about the data of the actual earthquake of this structural system.
In view of the foregoing, must on the basis of original structure system, carry out technological innovation, could enlarge its range of application, improve the industrialized level of building.
Three, summary of the invention:
1, the objective of the invention is on the basis of existing " steel concrete integrated prestress assembling slab column system ", a kind of joint structure technology is proposed, replace the prefabricated reinforced concrete column of former system with prefabricated steel column or pre-manufactured steel pipe concrete column, form " the fully-prefabricated assembled structure of steel-steel concrete ".
2, technical scheme:
Fig. 1 and Fig. 7 are layout plans of the present invention, comprise post 1, floor 2, presstressed reinforcing steel 3, side bar 4, cushion block 5.
(1), post 1 is H steel column or pre-manufactured steel pipe concrete column (placing of concrete in the steel pipe);
(2), form node, at the flooring absolute altitude place of the intersection of post 1, floor 2, side bar 4 this node be configured with two kinds:
One, to the joint structure of H steel column as shown in Figure 5, node place at the flooring absolute altitude is provided with stiffening rib 6, stiffening rib 6 is the C40 high-strength concrete, it is embedded between the edge of a wing 10 and web 9 of H shaped steel, height is identical with side bar 4, and steel supporting plate 7 is established in the stiffening rib bottom surface, with stiffening rib equal height place shearing resistance bar 8 is set in the outside, the edge of a wing of H shaped steel;
Its two, to the joint structure of pre-manufactured steel pipe concrete column as shown in figure 10,, steel core concrete column is the high strength micro expansion pea gravel concreten of perfusion in the steel pipe of square-section, is provided with shearing resistance bar 8 at the outer wall of flooring absolute altitude node place steel pipe;
(3), H steel column or pre-manufactured steel pipe concrete column leave two dimension prestressing muscle duct in the superstructure height, according to structural configuration, post 1 and cushion block 5 are located at the intersection of floor 2 and side bar 4, and cushion block 5 height are identical with side bar 4, leave two dimension prestressing muscle duct on the cushion block 5.The right angle breach is left at the plate angle of floor 2, forms seam between floor 2, the side bar 4 and between the post 1, cushion block 5, and 20 millimeters-30 millimeters of joint gaps are filled out in the seam with early strong high grade micro-expansion cement mortar.When seam side pieces surface was concrete surface, contact surface was the plane, need not cut a hole hair, does not also have teeth groove, and also no-reinforcing-bar stretches out or steel plate welds mutually, formed between post 1 and floor 2, the cushion block 5 " flushing joint "; When the contact surface on seam side pieces surface is respectively steel plate and concrete, by steel plate one side shearing resistance bar 8 is arranged, form by " the non-joint that flushes ".Form open channel between adjacent two floors 2 and between floor 2 and the side bar 4, presstressed reinforcing steel 3 is placed in the open channel, passes the reserving hole channel on post 1 and the cushion block 5, and two ends are anchored at the pillar or the superstructure outside.Then whole superstructure is applied two-way horizontal prestressing force, promptly integrated prestress is squeezed into integral body with floor all in the superstructure plane 2, post 1, cushion block 5, side bar 4; Floor relies on the stiction of prestressing force and generation thereof to be supported and fixed on the post 1, between floor 2, side bar 4 and the post 1, form prestressed node between floor 2, side bar 4 and the cushion block 5, " flush joint " and form prestressing force friction-type node, " the non-joint that flushes " forms prestressing force shearing-friction-type node; The open channel concrete is built in reserving hole channel grouting on coupled columns and the cushion block, and the entire infrastructure construction is from bottom to top successively carried out.
3, the fully-prefabricated assembled structure of steel-steel concrete has following advantage:
(1), the anti-seismic performance of steel core concrete column is better than steel column, the anti-seismic performance of steel column is better than reinforced concrete post, so, the anti-seismic performance of the fully-prefabricated assembled structure of steel-steel concrete is better than steel concrete integrated prestress assembling slab column system, can be applied to building aseismicity fortification intensity 9 degree areas;
(2), when the plate and the contact surface of post be that steel plate is when contacting with concrete, be provided with the shearing resistance bar by steel plate one side, " the non-joint that flushes " the prestressing force fricting shearing type of formation node, when frictional force is not enough to support floor structure, the shearing resistance bar can provide vertical shearing resistance, with the safety of frictional force acting in conjunction assurance node;
(3), steel core concrete column and steel column bearing capacity height, the cross section is little, help reducing dead load, reduce earthquake response, increase the usable floor area of building, be particluarly suitable for promoting the use of in townlet's building, villa, city suburbs dwelling house, Scenic Spot Area building, the renewal of traditional residence structural system;
(4), because steel core concrete column and steel column have good ductility, the right-angled intersection pull bar that can select economic and reliable for use under the prerequisite that guarantees structural safety, reduces structural cost as lateral resistant member.
(5), most of prefabricated units (beam, plate, post, cushion block etc.) can be removed (detailed process know clearly embodiment three) by original state, under standardized prerequisite, these members that are removed can be reused, rather than after the machine fragmentation, change its into and use, this technology is energy conservation and material consumption effectively, reduce generation of waste, significant to subtracting environment pollution, meet the requirement of sustainable development;
(6), be easy to construction, not high to on-the-spot water power conditional request, exceed the dependence special construction apparatus, the construction period is short, on-the-spot recruitment is few, water power is low-consuming, not only can use in the developed area, also can be generalized to remote districts; The on-the-spot pre-stress construction of this system can only be finished by professional contingent, is convenient to Construction Quality Control.
Four, description of drawings:
Fig. 1, Fig. 7 are layout plans, and 1 is post among the figure, the 2nd, and floor, the 3rd, presstressed reinforcing steel, the 4th, side bar, the 5th, cushion block; Fig. 2 is the axonometric drawing of Fig. 1, the 6th, and stiffening rib; Fig. 3 is the A-A sectional drawing of Fig. 1, the 7th, and steel supporting plate (being used for support concrete stiffening rib 6), the 8th, shearing resistance bar; Fig. 4 is the B-B sectional drawing of Fig. 1; Fig. 5 is a C enlarged drawing among Fig. 2, i.e. the joint structure figure of H steel column, the 9th, the web of H shaped steel, the 10th, the edge of a wing of H shaped steel; Fig. 6 is shearing resistance bar 8 way schematic diagrames, the 11st, and diameter is 8 millimeters a plain steel-bar; Fig. 8 is the axonometric drawing of Fig. 7; Fig. 9 is the D-D sectional drawing of Fig. 7; Figure 10 is an E enlarged drawing among Fig. 8, i.e. the joint structure figure of pre-manufactured steel pipe concrete column.
Five, the specific embodiment:
Example one (is positioned at the fully-prefabricated assembled structure of hot rolled H-shaped post steel-steel concrete in the 8 degree districts that provide fortification against earthquakes, 3 meters of floor heights, totally 2 layers; 10.2 meters of face widths are divided into 2 and stride, 5.1 meters of spans; 9.6 meters of depth are divided into two and stride, 4.8 meters of spans):
(1), steel column selects for use Q345 hot rolled H-shaped, 250 millimeters of breadth of section, 250 millimeters of depth of sections, 9 millimeters of web thicknesss, 14 millimeters of edge of a wing thickness, 6 meters of length;
(2), 300 millimeters of side bar height, in " the non-joint that flushes " position, H shaped steel edge of a wing arranged outside three road shearing resistance bars, 80 millimeters of spacings.Shearing resistance bar diameter is 8 HPB235 reinforcement fabrication, and reinforcing bar length is identical with hot rolled H-shaped flange width, is that 6 double welded joint is welded on hot rolled H-shaped edge of a wing outer surface with it with the leg height, and the shearing resistance bar completes.This shearing resistance bar has two effects, one, and under prestressed effect, mortar is by jam-packed in the seam, the shearing resistance bar produces the shearing of opposing floor vertical load, the safety that improves node, and they are two years old, increase post side shearing moment of torsion, can further strengthen the cracking resistance effect, improve the ultimate bearing capacity of structure;
(3), the steel supporting plate selects the Q235 steel plate for use, thickness is 4 millimeters, length is 220 millimeters, width is 120 millimeters, is welded on post 1 node place, three limits respectively with the inboard welding in web, the edge of a wing of H shaped steel, foot welding height is 3 millimeters, its bottom surface is concordant with the side bar bottom surface.The steel supporting plate is made for stiffening rib the bottom template is provided, and can also strengthen the ductility of node;
(4), with C40 high-strength slightly expanded concrete concreting stiffening rib, stiffening rib is a base plate with the steel supporting plate, the web of H steel column, the edge of a wing are sidewall, end face is concordant with the flooring absolute altitude.Stiffening rib can increase the rigidity of node, for the web and the edge of a wing of H steel column provides rigid support, avoid H shaped steel at the node place because of bearing the transverse prestress unstability;
(5), erection construction supports temporarily, with the prefabricated units hoisted in position, forms open channel and seam between the prefabricated units;
(6), with seam M40 rapid hardening high-strength microdilatancy filled with mortar and vibration compacting, maintenance;
(7), treat that rapid hardening high-strength microdilatancy mortar strength reaches designing requirement in the seam after, presstressed reinforcing steel is penetrated in the prefabricated units preformed hole in place, tensioned prestressing bar and anchoring;
(8), rapid hardening high-strength microdilatancy mortar is injected in the preformed hole of prefabricated units the joint filling of the high strength micro expansion mortar of usefulness M30, maintenance in the piece; After mortar reaches design strength in duct grouting and the piece, remove the interim support of construction;
(9), prick the weak direction of principal axis of H steel column, the cross pull bar is set, strengthens the ability of its anti-sidesway in heat.The cross pull bar is made of the equal leg angle of Q235, and leg of angle is wide 30 millimeters, and thick 3 millimeters of limb is welded on the web of hot rolled H-shaped post;
(10), successively make progress and construct, the fully-prefabricated assembled structure construction of hot rolled H-shaped post steel-steel concrete is finished.
Example two (is positioned at the fully-prefabricated assembled structure of pre-manufactured steel pipe concrete column steel-steel concrete in the 9 degree districts that provide fortification against earthquakes, 3 meters of floor heights, totally 3 layers; 15.3 meters of face widths are divided into 3 and stride, 5.1 meters of spans; 10.8 meters of depth are divided into two and stride, 5.4 meters of spans):
(1), selects Q345 square steel pipe, 300 millimeters of the cross section length of sides, 5 millimeters of wall thickness, 9 meters of steel pipe length for use;
(2), in steel pipe, pour into C40 slightly expanded concrete, formation pre-manufactured steel pipe concrete column.Concrete filled steel tube utilizes steel pipe and two kinds of material interactions in loading process of concrete, concrete intensity, plasticity and toughness are greatly improved, concrete can be avoided and delay steel pipe and under load action cripling take place, and guarantees that steel strength gives full play to; Save the program of reinforced concrete prefabricated column assembling reinforcement, saved form cost usefulness, accelerated speed of application; Fire resistance is good; The structural performance height, good economy performance;
(3), 300 millimeters of prefabricated side bar height, in " the non-joint that flushes " position, three road shearing resistance bars are set on the concrete filled steel tube column outer wall, 80 millimeters of spacings, with shearing resistance bar welding location, the function of shearing resistance bar and preparation method are with example one;
(4), erection construction supports temporarily, with the prefabricated units hoisted in position, forms open channel and seam between the prefabricated units;
(5), with seam M40 rapid hardening high-strength microdilatancy filled with mortar and vibration compacting, maintenance;
(6), treat that rapid hardening high-strength microdilatancy mortar strength reaches designing requirement after, presstressed reinforcing steel is penetrated in the prefabricated units preformed hole in place, tensioned prestressing bar and anchoring;
(7), rapid hardening high-strength microdilatancy mortar is injected in the preformed hole of prefabricated units the joint filling of the high strength micro expansion mortar of usefulness M30, maintenance in the piece; After mortar reaches design strength in duct grouting and the piece, remove the interim support of construction;
(8), successively make progress and construct, the fully-prefabricated assembled structure construction of steel core concrete column steel-steel concrete is finished.
The dismounting of example three H steel columns and the fully-prefabricated assembled structure of pre-manufactured steel pipe concrete column steel-steel concrete:
(1), on the structure that desire is removed, interim support is set;
(2), eliminate the prestressing force of presstressed reinforcing steel successively, the presstressed reinforcing steel segmentation is cut off with concrete cutting machine at soffit and end face edge joint position with termination unloading method;
(3), because prestressed forfeiture, floor, side bar separate at edge joint position with cushion block, with crane gear it are hung go back to ground;
(4), the residual mortar in cleaning post, floor, side bar and cushion block appearance and the preformed hole, concentrated standby;
(5), dismounting work begins from top layer, successively carry out downwards.

Claims (4)

1, the fully-prefabricated assembled structure of steel one steel concrete comprises post (1), floor (2), presstressed reinforcing steel (3), side bar (4), cushion block (5), it is characterized in that:
(1), post (1) is H steel column or pre-manufactured steel pipe concrete column,
(2), form node, at the flooring absolute altitude place of the intersection of post (1), floor (2), side bar (4) this node be configured with two kinds:
One, to the H steel column, be provided with stiffening rib (6) at the node place of flooring absolute altitude, stiffening rib is embedded between the edge of a wing (10) and web (9) of H shaped steel, height is identical with side bar (4), steel supporting plate (7) is established in the stiffening rib bottom surface, with stiffening rib equal height place shearing resistance bar (8) is set in the outside, the edge of a wing of H shaped steel
Its two, to the pre-manufactured steel pipe concrete column, steel core concrete column be in the steel pipe of square-section the perfusion high strength micro expansion pea gravel concreten, be provided with shearing resistance bar (8) at the outer wall place of flooring absolute altitude node steel pipe,
(3), H steel column or pre-manufactured steel pipe concrete column leave two dimension prestressing muscle duct in the superstructure height, post (1) and cushion block (5) are located at the intersection of floor (2) and side bar (4), the cushion block height is identical with side bar, leave two dimension prestressing muscle duct on the cushion block, the right angle breach is left at the plate angle of floor (2), floor (2), between the side bar (4) and post (1), cushion block forms seam between (5), 20 millimeters-30 millimeters of joint gaps, fill out in the seam with early strong high grade micro-expansion cement mortar, when seam side pieces surface is concrete surface, contact surface is the plane, post (1) and floor, form between the cushion block and flush joint, when the contact surface on seam side pieces surface is respectively steel plate and concrete, by steel plate one side shearing resistance bar (8) is arranged, form the non-joint that flushes, form open channel between adjacent two floors and between floor and the side bar, presstressed reinforcing steel (3) is placed in the open channel, pass the reserving hole channel on post (1) and the cushion block (5), two ends are anchored at the post or the superstructure outside, then whole superstructure is applied two-way horizontal prestressing force, with floors all in the superstructure plane (2), post (1), cushion block (5), side bar (4) is squeezed into integral body, floor relies on the stiction of prestressing force and generation thereof to be supported and fixed on the post (1), floor, between side bar and the post (1), floor, side bar and cushion block form prestressed node between (5), flush joint and form prestressing force friction-type node, the non-joint that flushes forms prestressing force shearing-friction-type node, reserving hole channel grouting on coupled columns and the cushion block, build the open channel concrete, the entire infrastructure construction is from bottom to top successively carried out.
2, the fully-prefabricated assembled structure of steel one steel concrete according to claim 1, it is characterized in that: the H steel column is hot rolled H-shaped.
3, the fully-prefabricated assembled structure of steel one steel concrete according to claim 1 is characterized in that: described shearing resistance bar (8) cooperates weld seam to make with reinforcing bar (11).
4, the fully-prefabricated assembled structure of steel one steel concrete according to claim 1, it is characterized in that: described square-section steel pipe is the square sectional steel pipe.
CNB200310104198XA 2003-12-28 2003-12-28 Steel-steel concrete fully prefabricated assembling structure Expired - Fee Related CN1298946C (en)

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* Cited by examiner, † Cited by third party
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CN101881051B (en) * 2010-03-08 2012-10-10 南通建筑工程总承包有限公司 Beam-beam connecting node structure

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