CN106320606A - Steel plate prestress-segmentally-reinforcing type embedded steel structure for concrete beam - Google Patents
Steel plate prestress-segmentally-reinforcing type embedded steel structure for concrete beam Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 277
- 239000010959 steel Substances 0.000 title claims abstract description 277
- 239000004567 concrete Substances 0.000 title claims abstract description 71
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 67
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 8
- 239000003351 stiffener Substances 0.000 claims description 111
- 230000011218 segmentation Effects 0.000 claims description 37
- 230000002787 reinforcement Effects 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 9
- 230000008602 contraction Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000002372 labelling Methods 0.000 description 19
- 238000005553 drilling Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- 210000003205 muscle Anatomy 0.000 description 8
- 238000003556 assay Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a steel plate prestress-segmentally-reinforcing type embedded steel structure for a concrete beam. The steel plate prestress-segmentally-reinforcing type embedded steel structure is composed of steel plate type structure groups and structure fixing rings. Each steel plate type structure group is composed of steel bar segmenting skeleton steel plates, conventional steel bars, reinforcing steel bar segmenting skeleton steel plates and reinforcing steel bars; and the structure fixing rings are used for fixing the steel plate type structure groups. According to the steel plate and steel hole segmentally-reinforcing type embedded steel structure for the concrete beam, the problems existing in an steel structure used for connecting the concrete beams through a traditional mode can be solved, the function of improving the prestress of the concrete beams is achieved, the connected steel bars can be stressed on the same horizontal plane, and the stress strength at the joints of the steel bars is improved; and more reinforcing steel bars can be arranged on the reinforcing fixing plates in a penetrating mode so as to enable destroyed breaking points of the concrete beam to move from the middle to the two sides, it is equivalent that the stressed length of the steel bars at the lower middle bottom of the concrete beam is shortened, the tensile strength is improved, and existing technical means can also achieve the mechanized and even automated production of the embedded steel structure.
Description
Technical field
:
The present invention relates to a kind of steel plate sectional and strengthen pre-stress type beams of concrete pre-buried steel structure.
Background technology
:
Connection in beams of concrete between reinforcing bar, traditional method is with tied silk binding or electric welding；Binding only plays interim fixation, is not substantially affected by power；Electric welding is the connection on top layer between reinforcing bar, therefore cannot central point stress between reinforcing bar；Reinforcing bar of going to the bottom in beams of concrete directly bears the center from beam and starts the pulling force to two simultaneously；Depth of beam determines to go to the bottom the reinforcing bar size by pulling force, and the Liang Yuegao of Proper Match, the pulling force suffered by reinforcing bar of going to the bottom is the fewest；Tradition improves prestressed way: the upper end and the big reinforcing bar overstriking gone to the bottom, encryption, the little reinforcing bar overstriking of surrounding, encryption；Beams of concrete is widened, increases；Although these ways can see effect, but relatively costly, waste resource, and increase, the broadening Tu Liang of loading in mixture is limited by place, and connects the steel construction of beams of concrete by traditional mode, the prospect being concentrated use in mechanization or automatization is relatively small.
At present, in patent CN103541437A disclosed in Chinese patent literature, disclose a kind of reinforced concrete frame node district additional steel plates and steel wire parcel reinforcement structure and preparation method, this reinforcement structure and preparation method are on the basis of former bean column node, by upper and lower for Column border node two parts, four corner additional L-type steel plates of column section, use resistance spot welding to be fixed with Column border node steel reinforcement cage by steel plate；And outside steel plate, wrap up layer of steel wire net, by tied silk, bar-mat reinforcement is fixed on Column border node steel reinforcement cage, collectively forms joint strengthening structure with L-type steel plate；Although but this structure globality is preferable, but not carrying out consolidation process in the most flimsy position, and reinforced concrete frame reinforcing process complexity adding manufacture difficulty.
In patent CN203008137U disclosed in Chinese patent literature, disclose a kind of steel core concrete column and reinforced beam top mode attachment structure, including steel core concrete column and the reinforced beam being attached thereto, steel core concrete column includes steel pipe, ring stiffener and vertical ribbed stiffener it is provided with in steel pipe, styletable rebound it is provided with outside steel pipe, styletable rebound is connected with the lower main muscle connecting plate of the upper main muscle connecting plate being located at reinforced beam top and bottom by high-strength bolt, and the junction of adjacent two reinforced beams is provided with node shear reinforcement；It is connected by too many node between this steel core concrete column with reinforced beam top mode attachment structure, fastness exists the biggest problem, simultaneously need to expend lot of materials, increase manufacturing cost.
Therefore, in order to solve above-mentioned difficulties, have employed steel plate steel hole segmentation heavier-duty beams of concrete pre-buried steel structure, the jumbo raising of prestressing force of beams of concrete can be caused；Use drilling steel plate connect reinforcing bar, it is possible to make the reinforcing bar being connected stress on same horizontal plane, improve reinforcing bar in junction by force intensity；Reinforcing bar is exactly the mid portion of reinforcing bar of going to the bottom by the link that pulling force is the weakest in beams of concrete, drilling steel plate is used to connect, as long as adding several hole on steel plate, wear several bar dowels in centre more, the breakpoint that beams of concrete just can be made destroyed moves to both sides from centre, be equivalent to go to the bottom in beams of concrete the contraction in length of reinforcing steel bar bear, the intensity of stretching resistance improves, and in the case of skilled operation, drilling steel plate strip connects steel construction cost of labor to be increased few, and the most existing technological means also can be to realize its mechanization even automated production.
Summary of the invention
:
The invention aims to solve to rely on traditional mode to connect the problem that the steel construction of beams of concrete exists, it is achieved improve the prestressed function of beams of concrete, it is provided that a kind of steel plate sectional strengthens pre-stress type beams of concrete pre-buried steel structure.
The present invention adopts the following technical scheme that and realizes its goal of the invention: a kind of steel plate sectional strengthens pre-stress type beams of concrete pre-buried steel structure, and it is made up of with structure ring for fixing 2 steel plate type structure group 1；Wherein steel plate type structure group 1 is made up of steel bar segmentation skeleton steel plate 3, conventional rebar 4, stiffener sectional framework steel plate 5 and stiffener 6；Steel bar segmentation skeleton steel plate 3 is located at steel plate type structure group 1 both sides；Stiffener sectional framework steel plate 5 is located at steel plate type structure group 1 centre position；Conventional rebar 4 runs through steel bar segmentation skeleton steel plate 3 and stiffener sectional framework steel plate 5, and steel bar segmentation skeleton steel plate 3 is evenly distributed with stiffener sectional framework steel plate 5；Stiffener 6 runs through stiffener sectional framework steel plate 5, and stiffener sectional framework steel plate 5 is evenly distributed；After long reinforcing bar is run through steel plate, each contact point is through spot-welded, is equal to be divided into long reinforcing bar several sections of bar dowels, improves the integrated prestress of beams of concrete pre-buried steel structure by improving the prestressing force of each section of bar dowel；The effect of steel plate type structure group 1 is to form firm reinforcement frame, improves the ring orientation prestress of beams of concrete；More structure ring for fixing 2, for fixation steel plate formula structure group 1, makes to organize steel plate type structure group 1 and forms multilayer architecture.
The present invention, in order to make the reinforcing bar being connected stress on same horizontal plane, increases each segment prestressing force, it is achieved improves the reinforcing bar function by force intensity in junction, is provided with steel bar segmentation skeleton steel plate 3 and conventional rebar 4；Steel bar segmentation skeleton steel plate 3 is the fixed plate setting up two separately made with steel plate in plank frame group；Conventional rebar 4 is installed through on steel bar segmentation skeleton steel plate 3, and links together with steel bar segmentation skeleton steel plate 3, and each junction point all uses spot welding, is allowed to form firm reinforcement frame.
The present invention is i.e. gone to the bottom the stretching resistance of mid portion of reinforcing bar and prestressed intensity by the link that pulling force is the weakest in beams of concrete to improve reinforcing bar, is provided with stiffener sectional framework steel plate 5 and stiffener 6；Stiffener sectional framework steel plate 5 is to be different from steel bar segmentation skeleton steel plate 3, is located at plank frame group centre position, the reinforcing plate made with steel plate；Stiffener 6 is installed through on stiffener sectional framework steel plate 5, and links together with stiffener sectional framework steel plate 5, and each junction point all uses spot welding, is allowed to form firm reinforcement frame；A plurality of stiffener 6 makes to go to the bottom in beams of concrete the contraction in length of reinforcing steel bar bear, and the intensity of stretching resistance improves.
The present invention, in order to realize arranging flexibly the function of assembling stiffener according to Strength Changes prestressed in real work, is provided with vertical setting of types stiffener hole 10 and horizontally-arranged stiffener hole 11；Vertical setting of types stiffener hole 10 and horizontally-arranged stiffener hole 11 are all the stiffener holes 8 on stiffener sectional framework steel plate 5, making horizontally-arranged or vertical setting of types selection according to actual needs, vertical setting of types stiffener hole 10 and horizontally-arranged stiffener hole 11 determine group number also dependent on practical situation.
Owing to have employed above technical scheme, the present invention preferably achieves its goal of the invention, this steel plate steel hole segmentation heavier-duty beams of concrete pre-buried steel structure can solve the problem that and relies on traditional mode to connect the problem that the steel construction of beams of concrete exists, it is achieved improve the prestressed function of beams of concrete；Use conventional fixed plate and conventional rebar, form firm reinforcement frame, it is possible to make the reinforcing bar being connected stress on same horizontal plane, improve reinforcing bar in junction by force intensity；Reinforcing bar is exactly the mid portion of reinforcing bar of going to the bottom by the link that pulling force is the weakest in beams of concrete, reinforcement fixed plate wears several stiffeners more, the breakpoint that beams of concrete just can be made destroyed moves to both sides from centre, be equivalent to go to the bottom in beams of concrete the contraction in length of reinforcing steel bar bear, the intensity of stretching resistance improves, and the design in vertical setting of types stiffener hole and horizontally-arranged stiffener hole can make the horizontally-arranged row of stiffener or the selection of vertical setting of types row according to prestressed needs in real work；In the case of skilled operation, this steel plate steel hole segmentation heavier-duty beams of concrete pre-buried steel infrastructure cost is the highest, and the most existing technological means also can be to realize its mechanization even automated production.
Accompanying drawing illustrates:
Accompanying drawing 1 is the overall structure schematic diagram of the present invention.
Accompanying drawing 2 is the structural representation of labelling 1 of the present invention.
Accompanying drawing 3 is the cross-sectional view of labelling 1 of the present invention.
Accompanying drawing 4 is the structural representation of labelling 3 of the present invention.
Accompanying drawing 5 is the structural representation of labelling 5 of the present invention.
Accompanying drawing 6 is the cross-sectional view of labelling 5 vertical setting of types of the present invention design.
Accompanying drawing 7 is the cross-sectional view of the horizontally-arranged design of labelling 5 of the present invention.
Accompanying drawing 8 is the structural representation that present invention drilling steel plate strip connects the first prestressing force first tested beam pre-buried steel structure of test of the beams of concrete of reinforcing bar.
Accompanying drawing 9 is the schematic front view that present invention drilling steel plate strip connects the first prestressing force first tested beam pre-buried steel structure of test of the beams of concrete of reinforcing bar.
Accompanying drawing 10 is the first structural representation contrasting beam pre-buried steel structure of first prestressing force test that present invention drilling steel plate strip connects the beams of concrete of reinforcing bar.
Accompanying drawing 11 is the first schematic front view contrasting beam pre-buried steel structure of first prestressing force test that present invention drilling steel plate strip connects the beams of concrete of reinforcing bar.
Accompanying drawing 12 is the structural representation that present invention drilling steel plate strip makes the prestressing force new tested beam pre-buried steel structure of test of new reinforced beam.
Accompanying drawing 13 is the schematic front view that present invention drilling steel plate strip makes the prestressing force new tested beam pre-buried steel structure of test of new reinforced beam.
Accompanying drawing 14 is the new structural representation contrasting beam pre-buried steel structure of prestressing force test that present invention drilling steel plate strip makes new reinforced beam.
Accompanying drawing 15 is the new schematic front view contrasting beam pre-buried steel structure of prestressing force test that present invention drilling steel plate strip makes new reinforced beam.
Description of reference numerals is shown in description last page form.
Detailed description of the invention:
Below in conjunction with the accompanying drawings summary of the invention is described further:
Embodiment
1
:
From summary of the invention, a kind of steel plate sectional strengthens pre-stress type beams of concrete pre-buried steel structure, and it is made up of with structure ring for fixing 2 steel plate type structure group 1；Wherein steel plate type structure group 1 is made up of steel bar segmentation skeleton steel plate 3, conventional rebar 4, stiffener sectional framework steel plate 5 and stiffener 6；Steel bar segmentation skeleton steel plate 3 is located at steel plate type structure group 1 both sides；Stiffener sectional framework steel plate 5 is located at steel plate type structure group 1 centre position；Conventional rebar 4 runs through steel bar segmentation skeleton steel plate 3 and stiffener sectional framework steel plate 5, and steel bar segmentation skeleton steel plate 3 is evenly distributed with stiffener sectional framework steel plate 5；Stiffener 6 runs through stiffener sectional framework steel plate 5, and stiffener sectional framework steel plate 5 is evenly distributed；After long reinforcing bar is run through steel plate, each contact point is through spot-welded, is equal to be divided into long reinforcing bar several sections of bar dowels, improves the integrated prestress of beams of concrete pre-buried steel structure by improving the prestressing force of each section of bar dowel；The effect of steel plate type structure group 1 is to form firm reinforcement frame, improves the ring orientation prestress of beams of concrete；More structure ring for fixing 2, for fixation steel plate formula structure group 1, makes to organize steel plate type structure group 1 and forms multilayer architecture.
Steel plate type structure group 1 of the present invention refers to: the main steel plate steel hole reinforcement structure of beams of concrete pre-buried steel structure；It is made up of steel bar segmentation skeleton steel plate 3, conventional rebar 4, stiffener sectional framework steel plate 5 and stiffener 6；Its effect is to form firm reinforcement frame, improves the ring orientation prestress of beams of concrete；Its structure is as shown in accompanying drawing 2,3, and its design attitude is as shown in labelling 1 in accompanying drawing 1.
Structure ring for fixing 2 of the present invention refers to: is made up of structure ring for fixing 2 fixation steel plate formula structure group 1 regular reinforcement and is formed and organize steel construction more；Its effect is fixation steel plate formula structure group 1, forms multi-layer framework；Its design attitude is as shown in labelling 2 in accompanying drawing 1.
Embodiment
2
:
The present invention, in order to make the reinforcing bar being connected stress on same horizontal plane, increases each segment prestressing force, it is achieved improves the reinforcing bar function by force intensity in junction, is provided with steel bar segmentation skeleton steel plate 3 and conventional rebar 4；Steel bar segmentation skeleton steel plate 3 is the fixed plate setting up two separately made with steel plate in plank frame group；Conventional rebar 4 is installed through on steel bar segmentation skeleton steel plate 3, and links together with steel bar segmentation skeleton steel plate 3, and each junction point all uses spot welding, is allowed to form firm reinforcement frame.
Steel bar segmentation skeleton steel plate 3 of the present invention refers to: be located at the steel plate at the two ends of beams of concrete pre-buried steel structure, with the framework that conventional rebar 4 forms a uniform force；Which is provided with conventional rebar hole 7；Its effect be connect conventional rebar 4, improve reinforcing bar in junction by force intensity；As shown in Figure 4, its design attitude is as shown in labelling 3 in accompanying drawing 2,3 for its structure.
Conventional rebar 4 of the present invention refers to: runs through with steel bar segmentation skeleton steel plate 3 and is connected, forms firm reinforcement frame；Its effect is through steel bar segmentation skeleton steel plate 3, makes all reinforcing bars stress on same horizontal plane, improve reinforcing bar in junction by force intensity；Its design attitude is as shown in labelling 4 in accompanying drawing 2,3.
Embodiment
3
:
The present invention is i.e. gone to the bottom the stretching resistance of mid portion of reinforcing bar and prestressed intensity by the link that pulling force is the weakest in beams of concrete to improve reinforcing bar, is provided with stiffener sectional framework steel plate 5 and stiffener 6；Stiffener sectional framework steel plate 5 is to be different from steel bar segmentation skeleton steel plate 3, is located at plank frame group centre position, the reinforcing plate made with steel plate；Stiffener 6 is installed through on stiffener sectional framework steel plate 5, and links together with stiffener sectional framework steel plate 5, and each junction point all uses spot welding, is allowed to form firm reinforcement frame；A plurality of stiffener 6 makes to go to the bottom in beams of concrete the contraction in length of reinforcing steel bar bear, and the intensity of stretching resistance improves.
Stiffener sectional framework steel plate 5 of the present invention refers to: be located at the steel plate in the centre position of beams of concrete pre-buried steel structure, increases stretching resistance with many stiffeners 6；Which is provided with stiffener hole 8 and strengthen fixed plate conventional rebar hole 9；Its effect is the intensity of the stretching resistance of the mid portion improving reinforcing bar of going to the bottom；As shown in Figure 5, its design attitude is as shown in labelling 5 in accompanying drawing 2,3 for its structure.
Stiffener 6 of the present invention refers to: many stiffeners 6 run through with stiffener sectional framework steel plate 5 and are connected, and are improved by force intensity；Its effect is through stiffener sectional framework steel plate 5, improves the intensity of the stretching resistance of the mid portion of reinforcing bar of going to the bottom；Its design attitude is as shown in labelling 6 in accompanying drawing 2,3.
Embodiment
4
:
The present invention, in order to realize arranging flexibly the function of assembling stiffener according to Strength Changes prestressed in real work, is provided with vertical setting of types stiffener hole 10 and horizontally-arranged stiffener hole 11；Vertical setting of types stiffener hole 10 and horizontally-arranged stiffener hole 11 are all the stiffener holes 8 on stiffener sectional framework steel plate 5, making horizontally-arranged or vertical setting of types selection according to actual needs, vertical setting of types stiffener hole 10 and horizontally-arranged stiffener hole 11 determine group number also dependent on practical situation.
Vertical setting of types stiffener hole 10 of the present invention refers to: the stiffener hole 8 on stiffener sectional framework steel plate 5 is arranged by vertical setting of types；Its effect is according to needs prestressed in real work, makes stiffener 6 vertical setting of types row install；Its design attitude is as shown in labelling 10 in accompanying drawing 6.
Horizontally-arranged stiffener hole 11 of the present invention refers to: the stiffener hole 8 on stiffener sectional framework steel plate 5 is by horizontally-arranged arrangement；Its effect is according to needs prestressed in real work, makes the horizontally-arranged row of stiffener 6 install；Its design attitude is as shown in labelling 11 in accompanying drawing 6.
Conventional rebar hole 7 of the present invention refers to: the conventional rebar hole on steel bar segmentation skeleton steel plate 3；Its effect is the installation for conventional rebar 4；Its design attitude is as shown in labelling 7 in accompanying drawing 4.
Stiffener hole 8 of the present invention refers to: the stiffener hole on stiffener sectional framework steel plate 5；Its effect is the installation for stiffener 6；Its design attitude is as shown in labelling 8 in accompanying drawing 5.
Reinforcement fixed plate conventional rebar hole 9 of the present invention refers to: the conventional rebar hole on stiffener sectional framework steel plate 5；Its effect is the installation for conventional rebar 4；Its design attitude is as shown in labelling 9 in accompanying drawing 5.
Embodiment
5
:
The first prestressing force of the beams of concrete connecting reinforcing bar by drilling steel plate strip is tested:
(1) first tested beam
Go to the bottom respectively by two root length 4500 millimeters, diameter 20 millimeters in both sides；Long 3000 millimeters, diameter 16 millimeters；Long 2250 millimeters, diameter 14 millimeters composition, both sides, the upper end are made up of two root length 4500 millimeters, diameter 12 millimeters, length 2250 millimeters, diameter 14 millimeters, connect above-mentioned reinforcing bar by the method above illustrated by 26 block length 480 millimeters, steel plate strip with holes wide 36 millimeters, thick 6 millimeters respectively on the both sides of beam.Make with the reinforcing bar of 21 root length 1800 millimeters, diameter 6.5 millimeters again and enclose; then the steel construction (Fig. 8,9 shown in) being made up of above-mentioned material; cast concrete, after adding up-protective layer, makes long 4520 millimeters, high 500 millimeters, the beams of concrete 3 of wide 260 millimeters.
(2) beam is contrasted for the first time
Design way routinely, each 1 root length in both sides of going to the bottom 4500 millimeters, the reinforcing bar of diameter 25 millimeters；Each 1 root length in both sides, the upper end 4500 millimeters, the reinforcing bar of diameter 22 millimeters；31 1800 millimeters, the enclosing of diameter 8 millimeters, the steel beam structure (Figure 10,11 shown in) being made up of above-mentioned material, pour into a mould concrete, after adding cement protective layer, make the length with tested beam and be the same from 3 beams.
The steel Theoretical Calculation gross weight 81.8 kilograms of first tested beam, contrast beam is 83 kilograms, real 79 kilograms of the tested beam that claims, real title 82.8 kilograms of beam of comparison, and first tested beam actually used steel gross weight is the 95.4% of contrast beam.
(3) method of inspection: directly concrete back is broken in the centre of beam with the jack of 200 tons, according to the peak record of meter reading.
(4) assay: contrast beam is 15.12 tons in the meansigma methods of central point forced breakage；Tested beam is 23. in the meansigma methods that central point ruptures
63 tons, the prestressing force of tested beam revenue centre point maximum is the 156.28% of contrast beam.
Embodiment
6
:
The prestressing force making new reinforced beam by drilling steel plate strip is tested:
Scheme one:
(1) new tested beam
The end muscle of going to the bottom on both sides is made with the reinforcing bar of 4 root length 4500 millimeters, diameter 16 millimeters, by the length 246 millimeters of both sides drilling, wide 52 millimeters, the steel plate strip 21 pieces of thick 0.6 millimeter, respectively by the method above illustrated, connect two reinforcing bars of going to the bottom that both sides are overlapping up and down, long 2250 millimeters, each two of the reinforcing bar of diameter 16 millimeters is respectively penetrated again on middle both sides, make to go to the bottom the both sides in the middle part of muscle have respectively be similar to long 2250 millimeters, " square steel " of the length of side 32 millimeters, play the firmest effect, solve " short slab " that " wooden pail effect " of beams of concrete is formed.Two root length 4500 millimeters of the upper end, the reinforcing bar of diameter 16 millimeters.Make with the reinforcing bar of 25 root length 1800 millimeters, diameter 8 millimeters and enclose muscle; make Figure 12, the steel construction shown in 13; cast concrete; after cement protective layer; make long 4520 millimeters, high 500 millimeters, the beams of concrete (remarks: weld the steel plate of the isosceles right triangle of a thickness 10 millimeters, waist length 100 millimeters on the angle of the mid-plane upper ledge gone to the bottom of wide 260 millimeters again; play Stabilization, stop waving of square bar framework of going to the bottom).
(2) beam (identical with Figure 10, the preliminary examination contrast beam shown in 11) is newly contrasted
Tested beam theory calculates the gross weight 87.1 kilograms of steel, 83.1 kilograms of beam of contrast, because of steel plate the most very specification, weight is decreased after tested beam drilling, claiming the gross weight 84.3 kilograms of tested beam, the gross weight 82.8 kilograms of contrast beam in fact, used by tested beam, the gross weight of steel is the 101.81% of contrast beam.
(3) method of inspection (identical with preliminary examination)
(4) assay: rupturing at the tested beam central point away from beam about 1130 millimeters, the highest stress is 33.06 tons, contrast beam ruptures at midpoint, the highest stress 15.12 tons, and the prestressing force of tested beam central point maximum is the 218.05% of contrast beam.
Scheme two:
(1) new tested beam
The end muscle gone to the bottom as both sides with 4 root length 4500 millimeters, diameter 22 millimeters, by long 246 millimeters, wide 72 millimeters, the steel plate strip 21 pieces of thick 8 millimeters, two reinforcing bars of going to the bottom that both sides are overlapping up and down are connected respectively by the method above illustrated, insert long 2250 millimeters, each two of the reinforcing bar of diameter 22 millimeters more respectively to both sides in centre, go to the bottom the both sides of muscle zone line formed respectively be similar to long 2250 millimeters, " square steel " of the length of side 44 millimeters, play the firmest effect, solve " short slab " that in beams of concrete, " wooden pail effect " is formed.2 root length 4500 millimeters of the upper end, the reinforcing bar of diameter 22 millimeters, make of the reinforcing bar of 36 root length 1800 millimeters, diameter 8 millimeters and enclose muscle, make Figure 12, the steel construction shown in 13, cast concrete, make long 4520 millimeters, wide 260 millimeters, the beams of concrete (remarks: weld a thickness 10 millimeters, the isosceles right triangle steel plate of waist length 100 millimeters on the angle of the mid-plane frame gone to the bottom of high 500 millimeters, play Stabilization, stop waving of square bar framework of going to the bottom).
(2) beam is newly contrasted
Design to increase reinforcing bar routinely and improve prestressed method: go to the bottom and averagely put 4 root length 4500 millimeters, the reinforcing bar of diameter 25 millimeters；The upper end, averagely puts 4 root length 4500 millimeters, the reinforcing bar of diameter 22 millimeters；Make of the reinforcing bar of 45 root length 1800 millimeters, diameter 8 millimeters and enclose, make Figure 14, the steel construction shown in 15.The length of whole beams of concrete is identical with tested.
Tested beam presses Theoretical Calculation steel gross weight 153.6 kilograms, actual weighs 152.2 kilograms, and comparison beam theory calculates and weighs 154 kilograms, and actual weighing is 152.5 kilograms, and the actually used steel gross weight of tested beam is the 99.8% of contrast beam.
(3) method of inspection (identical with preliminary examination)
(4) assay: rupturing at the tested beam central point away from beam about 1130 millimeters, the highest stress is 45.99 tons, contrast beam is in central point fracture the highest stress 28.67 tons, and the prestressing force of tested beam central point maximum is the 160.41% of contrast beam.
| Reference numerals | Labelling title | Reference numerals | Labelling title |
| 1 | Steel plate type structure group 1 | 7 | Conventional rebar hole 7 |
| 2 | Structure ring for fixing 2 | 8 | Stiffener hole 8 |
| 3 | Steel bar segmentation skeleton steel plate 3 | 9 | Strengthen fixed plate conventional rebar hole 9 |
| 4 | Conventional rebar 4 | 10 | Vertical setting of types stiffener hole 10 |
| 5 | Stiffener sectional framework steel plate 5 | 11 | Horizontally-arranged stiffener hole 11 |
| 6 | Stiffener 6 |
Claims (6)
1. steel plate sectional strengthens a pre-stress type beams of concrete pre-buried steel structure, it is characterized in that it is made up of with structure ring for fixing (2) steel plate type structure group (1)；Composite steel plank frame group (1) is fixed as an entirety by structure ring for fixing (2).
A kind of steel plate sectional the most according to claim 1 strengthens pre-stress type beams of concrete pre-buried steel structure, it is characterized in that steel plate type structure group (1) is made up of with stiffener (6) steel bar segmentation skeleton steel plate (3), conventional rebar (4), stiffener sectional framework steel plate (5)；Steel bar segmentation skeleton steel plate (3) is located at steel plate type structure group (1) two；Stiffener sectional framework steel plate (5) is located at steel plate type structure group (1) centre position；Conventional rebar (4) runs through steel bar segmentation skeleton steel plate (3) and stiffener sectional framework steel plate (5), and steel bar segmentation skeleton steel plate (3) is evenly distributed with stiffener sectional framework steel plate (5)；Stiffener (6) runs through stiffener sectional framework steel plate (5), and stiffener sectional framework steel plate (5) is evenly distributed；Described steel plate type structure group (1) forms firm reinforcement frame, improves the ring orientation prestress of beams of concrete；Described structure ring for fixing (2) is used for fixation steel plate formula structure group (1), makes to organize steel plate type structure group (1) more and forms multi-layer framework；Described steel plate sectional strengthen prestressed be meant that long reinforcing bar is run through steel plate after each contact point through spot-welded, it is equal to be divided into long reinforcing bar several sections of bar dowels, improves the integrated prestress of beams of concrete pre-buried steel structure by improving the prestressing force of each section of bar dowel.
A kind of steel plate sectional the most according to claim 2 strengthens pre-stress type beams of concrete pre-buried steel structure, it is characterized in that being provided with steel bar segmentation skeleton steel plate (3) and conventional rebar (4) on steel plate type structure group (1)；Described steel bar segmentation skeleton steel plate (3) is the fixed plate setting up two separately made with steel plate in steel plate type structure group (1)；Described conventional rebar (4) is installed through on steel bar segmentation skeleton steel plate (3), and links together with steel bar segmentation skeleton steel plate (3), and each junction point all uses spot welding, is allowed to form firm reinforcement frame；The effect of steel bar segmentation skeleton steel plate (3) and conventional rebar (4) is to make the reinforcing bar being connected stress on same horizontal plane, increases each segment prestressing force, it is achieved improve reinforcing bar in junction by force intensity.
4. strengthen pre-stress type beams of concrete pre-buried steel structure according to a kind of steel plate sectional described in claim 1,2, it is characterized by that steel plate type structure group (1) is provided with stiffener sectional framework steel plate (5) and stiffener (6)；Described stiffener sectional framework steel plate (5) is different from steel bar segmentation skeleton steel plate (3), is located at steel plate type structure group (1) centre position, the reinforcing plate made with steel plate；Described stiffener (6) is installed through on stiffener sectional framework steel plate (5), and links together with stiffener sectional framework steel plate (5), and each junction point all uses spot welding, is allowed to form firm reinforcement frame；A plurality of stiffener (6) makes to go to the bottom in beams of concrete the contraction in length of reinforcing steel bar bear, and the intensity of stretching resistance improves；The effect of stiffener sectional framework steel plate (5) and stiffener (6) is to improve reinforcing bar i.e. to be gone to the bottom the stretching resistance of mid portion of reinforcing bar and prestressed intensity by the link that pulling force is the weakest in beams of concrete.
A kind of steel plate sectional the most according to claim 4 strengthens pre-stress type beams of concrete pre-buried steel structure, it is characterized in that being provided with vertical setting of types stiffener hole (10) on stiffener sectional framework steel plate (5)；Described vertical setting of types stiffener hole (10) is the stiffener hole (8) on stiffener sectional framework steel plate (5), and vertical setting of types stiffener hole (10) can determine group number according to practical situation.
Stiffener sectional framework steel plate (5) the most according to claim 5, is characterized in that being provided with horizontally-arranged stiffener hole (11) on stiffener sectional framework steel plate (5)；Described horizontally-arranged stiffener hole (11) is the stiffener hole (8) on stiffener sectional framework steel plate (5), and horizontally-arranged stiffener hole (11) can determine group number according to practical situation.
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| CN113123527A (en) * | 2021-04-20 | 2021-07-16 | 黄均贤 | Concrete beam skeleton structure and manufacturing method of concrete beam |
| CN113700218A (en) * | 2021-09-29 | 2021-11-26 | 黄均贤 | Framework structure of steel material alternate combination in concrete beam |
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