CN101718113B - Method for making shock-resistant and energy-dissipating framework by mixing resin concrete and reinforced concrete - Google Patents
Method for making shock-resistant and energy-dissipating framework by mixing resin concrete and reinforced concrete Download PDFInfo
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- CN101718113B CN101718113B CN2009102375364A CN200910237536A CN101718113B CN 101718113 B CN101718113 B CN 101718113B CN 2009102375364 A CN2009102375364 A CN 2009102375364A CN 200910237536 A CN200910237536 A CN 200910237536A CN 101718113 B CN101718113 B CN 101718113B
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Abstract
The invention relates to a method for making a shock-resistant and energy-dissipating framework by mixing resin concrete and reinforced concrete, which comprises the following six steps of: (1) reserving a position of the framework, at which a plastic hinge is possible to emerge, and pouring other parts of the framework according to an original construction design; (2) conserving the concrete poured in the framework for 14 days, carving burrs from the concrete around the reserved position, clearing gravels and dust off and cleaning the surface by acetone; (3) priming a layer with a thickness of 3 to 5mm by resin cement; (4) supporting a template at the reserved position; (5) preparing and pouring the resin concrete; and (6) standing and conserving the resin concrete framework over 10 DEG C for 72 hours and stripping a mold. Because the ultimate compression strain of the resin concrete is far greater than that of the ordinary concrete, the resin concrete is filled at an appropriate position in an ordinary reinforced concrete framework to form a mixed framework structure. Therefore, the framework can consume earthquake energy on the premise of not being damaged entirely. The method has a practical value in the technical field of civil engineering.
Description
(1) technical field
The present invention relates to a kind of mixing resin concrete and reinforced concrete framework preparation method of shock-resistant and energy-dissipating, be mainly used in building, bridge and water conservancy field, belong to the civil works technical field.
(2) background technology
China is the multiple country of earthquake, and earthquake disaster is huge to the destruction of building structure.The seismic design of newly-built structure and reinforcing design are two importances of earthquake disaster mitigation, also are the research emphasis and the focus of Chinese scholars.
The energy-dissipating and shock-absorbing technology reaches and reinforces in the seismic design that China at first is applied to structure in recent years, and this technology is the energy dissipation component of placing the devices for dissipation of energy of some or some is set in structure.Be mainly used in the middle of the steel work at present.
And reinforced concrete structure is as the building structure that is most widely used in the civil engineering, and traditional Seismic Design Method of " three levels, two-stage " mainly relies on plastic strain performance after the structural element surrender and the hysteretic energy seismic energy that dissipates.Because the low strain cracking of limitation, the especially concrete material of conventional steel tendon concrete structure self makes that the material function of reinforcing bar can not effectively be brought into play at the linear elasticity working stage of structure.The present invention proposes to adopt the resin concrete with moderate finite deformation to be filled into the place that plastic hinge may appear in structure, wishes to open up a new visual angle for traditional reinforced concrete structure design and research.So-called large deformation mixing resin concrete and reinforced concrete framework is meant appropriate location in the ordinary reinforced concrete framework, the potting resin concrete is formed a kind of combination frame structure, thereby but makes structure consume significant seismic energy just under the non-destructive prerequisite of integral body.
In traditional reinforced concrete structure, concrete mainly bears pressure, and reinforcing bar mainly bears pulling force.Concrete belongs to fragile material, and it only is 1/3rd of reinforcing bar limiting strain (0.01) that its limit is bent compressive strain (0.0033).Usually under geological process, the strain that do not reach capacity as yet of the reinforcing bar in the reinforced concrete frame, concrete is just crushed, causes structural deterioration.The limit compressive strain of resin concrete can reach 0.02, and its intensity is also far above ordinary concrete.Change the reinforcing bar resin concrete into if the place of steel concrete plastic hinge may occur in framework, under seismic loading, the ductility of reinforced concrete frame structure will be improved greatly, the dreamboat that the big shake of implementation structure is not bad.
(3) summary of the invention
1, purpose: the objective of the invention is for a kind of mixing resin concrete and reinforced concrete framework preparation method of shock-resistant and energy-dissipating is provided, this method has overcome the deficiencies in the prior art, it is to utilize the characteristic of the limit compressive strain of resin concrete much larger than ordinary concrete, appropriate location in the ordinary reinforced concrete framework, thereby the potting resin concrete is formed a kind of combination frame structure, but make framework earthquake energy just under the non-destructive prerequisite of integral body, reach no collapsing with strong earthquake, middle shake can be repaiied, little shake is not bad effect.
2, technical scheme:
The mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating of the present invention, it is major ingredient that used resin concrete adopts with the resin, mix an amount of curing compound, plasticizing agent, thinner and inserts as bonding adhesive, with sand, masonry is aggregate, the straight polymer concrete that forms through mixing, moulding, curing.
The mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating of the present invention, these method concrete steps are as follows:
Step 1: after the framework reinforcing bar binding is finished, reserve frame construction beam column node and post root position (being the position that plastic hinge may appear in framework), other parts are built by former working design;
Step 2: be cast in the interior concrete curing of framework after 14 days, reserved location this concrete is on every side dug out hair stubble (increasing the bonding between new-old concrete), and with rubble, dust removing totally, the surface is cleaned with acetone;
Step 3: with this concrete surface bottoming one deck that resin cement goes at cutter, thickness is the 3-5 millimeter;
Step 4: template is propped up at the place at reserved location, and the template inwall coats one deck preservative film, to make things convenient for form removal;
Step 5: at first in resin, add thinner, add curing compound, plasticizing agent then, place 40-50 degree centigrade tepidarium fully to stir 10 minutes said mixture; Then mixture is poured into cement, stone, sand stirred 3 minutes resin concrete; The place builds resin concrete at reserved location, fully vibrates with vibrating spear;
Step 6: will build the framework of resin concrete, and rest on maintenance under the environment more than 10 degrees centigrade, form removal after 72 hours;
Wherein: the resin cement described in the step 3, the mass percent of its composition is: resin is 30%-45%; Curing compound is 5%-10%; Plasticizing agent is 5-10%; Inserts is 35%-60%.
Wherein: the described resin concrete of building of step 5, the mass percent of its composition is: resin is 10%-25%; Curing compound is 1%-5%; Plasticizing agent is 0-5%; Thinner 1%-5%; Inserts is 10%-13%; Aggregate is 50%-60%.
Wherein: resin described in the above-mentioned steps is meant unsaturated polyester, epoxy, polyurethane, phenolic aldehyde or barks resin such as mutter; Curing compound is meant ethylenediamine or T31; Plasticizing agent is meant dibutyl phthalate (DBP), o-phthalic acid dibutyl ester or tbp; Thinner is meant acetone, toluene or dimethylbenzene; Inserts is meant cement, quartz powder, stone flour, aluminium powder or graphite powder; Aggregate is meant sand and stone, and the stone particle diameter is the 8-15 millimeter, and sand grains directly is the 1-2.5 millimeter.
3, advantage and effect: the mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating of the present invention, its feature is as follows:
(1) it is strong to resist the ability of earthquake: because that the ductility of new construction improves with respect to ordinary reinforced concrete structure is a lot, and the structural response when the power consumption function of structure self will reduce earthquake significantly.In order to increase the shock resistance of ordinary concrete structure, general several method (reinforcings, shock insulation layer, additional damping device etc.) at present all exists or increases dead load or increased problems such as difficulty of construction, minimizing usage space.And the new structure of this project research has comparatively significant advantage aspect above-mentioned.
(2) restorability of structure: ordinary reinforced concrete structure is resisted earthquake and is generally designed on structural seismic theoretical foundation, the design principles of this class formation is " little shake is not bad; middle shake can be repaiied, no collapsing with strong earthquake ", and the ability of the dissipation seismic energy of structure self is very low.Under the moderate shock disaster, structure is damaged part, and this moment, the energy dissipation state of structure was to be cost with the structural damage.Part concrete destruction, part reinforcement yielding in the structure, this repairs for the shake back and causes huge burden.Novel concrete structure can have the ability of good dissipation energy when bigger geological process, geological process is big more, and dissipation energy is many more, and estimable is that structure can still keep whole serviceable condition in sizable seismic load scope.Therefore after resisting bigger earthquake, structure is excused from a college course multiple.
(3) analysis of structure and construction: the Seismic Analysis of ordinary reinforced concrete structure needs nonlinear analysis, the huge and poor effect of workload.The duty of new construction is that local distortion is big, material is non-linear, and integral body is linear elasticity, and its Seismic Analysis is wanted simple make many.Its engineering design and current specifications are close.The design of reinforcement of low-yield reinforcing bar and construction and traditional arrangement of reinforcement are basic identical with construction, do not cause more trouble.
(4) economic benefit: if the 5-10% of existing building structure is adopted the resin concrete structure, effective earthquake reacting phase of structure is reduced much for traditional architecture, can make the ability of structure opposing earthquake improve several earthquake intensitys.Just building up this will be far below the construction cost of traditional seismic design, isolation design and the design of additional damping device.Safeguard in labour, aspect the reparation of shake post-reinforcing, the economic benefit that new construction brings is with highly significant.
(4) description of drawings
The mixing resin concrete and reinforced concrete frame construction schematic diagram of Fig. 1 shock-resistant and energy-dissipating of the present invention
(5) specific embodiment
The present invention is further illustrated with specific embodiment below, and the mixing resin concrete and reinforced concrete frame construction schematic diagram of shock-resistant and energy-dissipating of the present invention is seen shown in Figure 1.
The mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating of the present invention, the scale of construction size that resin concrete can be reinforced is as required selected artificial stirring or is adopted the ordinary concrete mixer to stir.Concrete steps are as follows:
Step 1: after the framework reinforcing bar binding is finished, reserve frame construction beam column node and post root position (being the position that plastic hinge may appear in framework), other parts are built by former working design;
Step 2: be cast in concrete curing in the framework after 14 days, this concrete around the reserved location is dug out hair stubble (increasing the bonding between new-old concrete), blow away little block concrete and dust with air compressor machine, the surface is cleaned with acetone;
Step 3: it is 5 millimeters bottom that this concrete surface that goes at cutter with resin cement is beaten thickness; The mass percent of resin cement composition is: epoxy resin 30%, ethylenediamine 10%, dibutyl phthalate (DBP) 8%, cement 50%.
Step 4: template is propped up at the place at reserved location, and the template inwall coats one deck preservative film, to make things convenient for form removal;
Step 5: at first in epoxy resin, add acetone diluted, add ethylenediamine curing, dibutyl phthalate (DBP) plasticising then, place 45 degrees centigrade tepidarium fully to stir 10 minutes said mixture; Then mixture being poured into cement, stone, sand stirred 3 minutes; The place builds resin concrete at reserved location, fully vibrates with the concrete vibrating rod; The mass percent of resin concrete composition is: epoxy resin 13%, and acetone 3%, ethylenediamine 3%, dibutyl phthalate (DBP) 3%, cement 10%, diameter are 15 millimeters stone 30%, diameter is 15 millimeters a sand 30%;
Step 6: the resin concrete framework that will build rests on maintenance under the environment more than 10 degrees centigrade, form removal after 72 hours;
Claims (5)
1. the mixing resin concrete and reinforced concrete framework preparation method of a shock-resistant and energy-dissipating, it is characterized in that: these method concrete steps are as follows:
Step 1: after the framework reinforcing bar binding is finished, reserve frame construction beam column node and post root position is the position that plastic hinge may appear in framework, other parts are built by former working design;
Step 2: be cast in the interior concrete curing of framework after 14 days, this concrete around frame construction beam column node and the post root position is dug out the hair stubble, and rubble, dust are removed totally, the surface is cleaned with acetone;
Step 3: this concrete surface prime coat that goes at cutter with resin cement;
Step 4: template is propped up at the place at reserved location, and the template inwall coats one deck preservative film, to make things convenient for form removal;
Step 5: at first in resin, add thinner, add curing compound and plasticizing agent then, place 40-50 degree centigrade tepidarium fully to stir said mixture; Then mixture is poured into stir in cement, stone and the sand resin concrete; The place builds resin concrete at reserved location, fully vibrates with vibrating spear;
Step 6: will build the framework of resin concrete, and rest on maintenance under the environment more than 10 degrees centigrade, form removal after 72 hours.
2. the mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating according to claim 1 is characterized in that: the concrete surface prime coat that goes at cutter with resin cement described in the step 3, the thickness of this bottom is the 3-5 millimeter.
3. the mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating according to claim 1 is characterized in that: the resin cement described in the step 3, and the mass percent that this resin cement is formed is: resin is 30%-45%; Curing compound is 5%-10%; Plasticizing agent is 5-10%; Inserts is 35%-60%.
4. the mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating according to claim 1 is characterized in that: the described resin concrete of step 5, and the mass percent that this resin concrete is formed is: resin is 10%-25%; Curing compound is 1%-5%; Plasticizing agent is 0-5%; Thinner 1%-5%; Inserts is 10%-13%; Aggregate is 50%-60%, and all each percentages of ingredients sums are 100%.
5. the mixing resin concrete and reinforced concrete framework preparation method of a kind of shock-resistant and energy-dissipating according to claim 4, it is characterized in that: described resin is meant unsaturated polyester resin, epoxy resin, polyurethane resin, phenolic aldehyde or furane resins; Described curing compound is meant ethylenediamine or T31; Described plasticizing agent is meant dibutyl phthalate, dioctyl phthalate or tributyl phosphate; Described thinner is meant acetone, toluene or dimethylbenzene; Described inserts is meant cement, quartz powder, stone flour, aluminium powder or graphite powder; Described aggregate is meant that the stone particle diameter is that 8-15 millimeter, sand grains directly are the sand and the stone of 1-2.5 millimeter.
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| CN101718113B true CN101718113B (en) | 2011-12-28 |
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| CN103088908B (en) * | 2013-02-08 | 2015-09-09 | 于占林 | Composite concrete placement lightweight concrete soil structure |
| CN103979890B (en) * | 2014-05-09 | 2016-04-13 | 新疆交通科学研究院 | Rapid construction highway repair material and preparation method thereof and using method |
| CN105801054A (en) * | 2016-03-18 | 2016-07-27 | 苏州亚思科精密数控有限公司 | Machine tool foundation having vibration reducing performance |
| CN106149875B (en) * | 2016-08-24 | 2019-07-12 | 中国航天建设集团有限公司 | The construction method and mounting process of double-T three-dimensional connecting elements |
| CN108285300A (en) * | 2018-04-02 | 2018-07-17 | 贵阳市政建设有限责任公司混凝土制品分公司 | A kind of large volume epoxy resin concrete casting craft |
| CN113865929A (en) * | 2021-11-04 | 2021-12-31 | 四川大学 | Drilling sampling equipment for engineering detection |
| CN115043635A (en) * | 2021-12-30 | 2022-09-13 | 宁夏亿丰砼业有限公司 | Preparation method of high-ductility shock absorption concrete |
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| JP2001132262A (en) * | 1999-11-02 | 2001-05-15 | Oriental Construction Co Ltd | Vibration control frame provided with friction damping mechanism |
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