CN114250879A - Recycled concrete damping energy dissipation beam and preparation method thereof - Google Patents
Recycled concrete damping energy dissipation beam and preparation method thereof Download PDFInfo
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- CN114250879A CN114250879A CN202111661289.8A CN202111661289A CN114250879A CN 114250879 A CN114250879 A CN 114250879A CN 202111661289 A CN202111661289 A CN 202111661289A CN 114250879 A CN114250879 A CN 114250879A
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- 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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2046—Shock-absorbing materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to a recycled concrete damping energy dissipation beam and a preparation method thereof. Compared with the prior art, the invention utilizes the regenerated aggregate particles placed in the inner cavity to collide and consume energy during vibration while utilizing the high ductility of the fiber regenerated concrete, thereby effectively consuming the energy during the vibration of the structure; meanwhile, the movement of the particles is optimized through the corrugated plate adhered to the bottom of the cavity so as to obtain the optimal vibration reduction effect under different vibration frequencies, and the corrugated plate is expected to be applied to non-bearing parts in the structure and used as an energy consumption component.
Description
Technical Field
The invention belongs to the technical field of building engineering, and relates to a recycled concrete damping energy dissipation beam for improving the seismic performance of a building structure and controlling vibration and a preparation method thereof.
Background
The concrete has the characteristics of higher compressive strength and lower tensile strength. The regenerated concrete structure is easy to produce and crack to damage under the action of vibration load. Meanwhile, the building progresses to a high level, and the influence of wind becomes negligible. Thus reducing the vibration of the structure under a vibration load and absorbing the energy transmitted by the earthquake to prevent the structure from collapsing, which are all the concerns in the current building design. The traditional vibration reduction and shock resistance method is realized by additionally arranging a damper, but the damper is limited in wide application due to the high structural price.
The recycled concrete is prepared by crushing and processing the building solid waste generated by demolishing old buildings, can simultaneously solve the problem of disposal of the building solid waste generated in the process of construction and demolition under the trend of urbanization development, can solve the problem of damage of resource exploitation to the environment as a substitute of natural sandstone resources, and is a green and environment-friendly building material. The recycled aggregate comprises the interface transition area in the original concrete and has more weak surfaces, so that the recycled aggregate has better damping performance compared with the common concrete, and the recycled aggregate is lower in price compared with the natural aggregate. The addition of the fibers to the concrete retards crack propagation after crack formation in the concrete, thereby providing the concrete with better ductility. The particle can consume the energy of vibration in a collision mode, and the particle damper researched by the particle damper is a novel damper.
In view of the requirements for vibration reduction and earthquake resistance in the above buildings, the concern of cost and the requirement of environmental protection, a method for improving the earthquake resistance of the buildings by using the damping performance of the structure through the design of structural members of the buildings is needed.
Disclosure of Invention
The invention aims to provide a recycled concrete damping energy dissipation beam and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a recycled concrete damping power consumption roof beam, includes roof beam body, a plurality of along length direction set up in the inside cavity of roof beam body, locate the buckled plate of cavity bottom, and a plurality of damping granule of locating on the buckled plate.
Further, the beam body is made of a fiber recycled concrete material, and the fiber recycled concrete material comprises the following components in parts by weight:
1 part of cement; 0-0.4 part of natural coarse aggregate; 1.5-3.3 parts of regenerated coarse aggregate; 1.4-2.6 parts of river sand; 0.3-0.4 part of water; 0.04-0.1 part of fiber; 0.002-0.018 portion of water reducing agent.
Further, the cement is P.O 42.5.5-grade ordinary portland cement; the fineness modulus of the river sand is 2.4-3.1; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 25-50%; the fiber is one of polyacrylonitrile fiber, polyester fiber or polypropylene fiber, and the length of the fiber is 3-9 mm; the particle size of the natural coarse aggregate is 5-25m, and the recycled coarse aggregate is I-type recycled aggregate or II-type recycled aggregate, and the particle size is 5-25 mm.
Furthermore, the damping particles are recycled aggregate particles with the sphericity of not less than 0.95, the particle size is 60-80mm, and the damping particles are prepared from I-type recycled aggregates.
Further, the filling rate of the damping particles in the cavity is 10-30%.
Further, the total volume of the cavities is 40-50% of the total volume of the beam body; the wall thickness between adjacent cavities is not less than 60 mm.
Furthermore, the corrugated plate consists of a plate body and a plurality of recesses and protrusions which are staggered and arranged on the plate body in parallel.
Furthermore, the plate body is a polycarbonate plate with the thickness of 2-4mm, the concave part is smoothly connected with the convex part, the height difference between the bottom end of the concave part and the top end of the convex part is 30-40mm, and the distance between the adjacent concave part and the convex part is 180-240 mm.
A preparation method of a recycled concrete damping energy dissipation beam comprises the following steps:
1) binding a steel bar framework, pouring and maintaining the bottom, the side walls and the cavity intervals of the molded beam body, and reserving stirrups at the formed side walls and the tops of the cavity intervals;
2) putting corrugated plates and damping particles;
3) binding a top steel reinforcement framework based on the reserved stirrups, pouring, maintaining and forming the top of the beam body, and obtaining the damping energy dissipation beam.
Further, in the step 1), the used stirrups are U-shaped stirrups, and two ends of each stirrup are upwards exposed out of the formed side wall and the top of the cavity interval;
and 3) before binding the top steel reinforcement framework, covering the top opening of the cavity with a plastic plate, and then binding and pouring.
Compared with the prior art, the invention has the following characteristics:
1) according to the invention, the fiber recycled concrete has high ductility, and the recycled aggregate particles placed in the inner cavity are utilized, so that collision energy consumption is realized during vibration, and the energy during structural vibration can be effectively consumed; meanwhile, the movement of the particles is optimized through the corrugated plate adhered to the bottom of the cavity so as to obtain the optimal vibration reduction effect under different vibration frequencies, and the corrugated plate is expected to be applied to non-bearing parts in the structure and used as an energy consumption component;
2) the beam body and the damping particles are prepared from the recycled aggregate, so that the consumption of the natural coarse aggregate can be saved, the treatment cost and the energy consumption of the waste concrete are reduced, and the economic and environmental benefits are higher.
Drawings
FIG. 1 is a schematic structural diagram of a recycled concrete damping energy dissipation beam in an embodiment;
FIG. 2 is a schematic structural view of a corrugated board;
FIG. 3 is a graph of the applied displacements of the examples and comparative examples in a simulation over time;
FIG. 4 is a simulation result of the change rate of stress of the damping energy dissipating beam of the comparative example with time;
FIG. 5 is a simulation result of the change rate of stress of the damping energy dissipating beam according to the embodiment with time;
1-beam body, 2-cavity, 3-corrugated plate, 301-plate body, 302-recess and 303-projection.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
the recycled concrete damping energy dissipation beam shown in fig. 1 comprises beam bodies 1 and 6 cavities 2 arranged in the beam bodies 1 along the length direction, corrugated plates 3 arranged at the bottoms of the cavities 2, and a plurality of damping particles arranged on the corrugated plates 3.
The preparation method of the damping energy dissipation beam comprises the following steps:
s1: preparing a fiber recycled concrete material based on the following components in parts by weight:
1 part of cement; 0.2 part of natural coarse aggregate; 2.8 parts of recycled coarse aggregate; 2.2 parts of river sand; 0.4 part of water; 0.04 part of fiber; 0.006 part of a water reducing agent;
wherein, the cement is P.O 42.5.5-grade ordinary portland cement; the fineness modulus of the river sand is 2.4-3.1; the water reducing agent is FOX-C1029 polycarboxylate water reducing agent with the water reducing rate of 30%; the fiber is polyacrylonitrile fiber of chemical industry of the Jinan Haoyan, and the length is 6 mm; the particle size of the natural coarse aggregate is 5-25 m; the recycled coarse aggregate is I-type recycled aggregate, and the grain size is 5-25 mm.
S2: binding a steel bar framework, pouring C30 concrete into the bottom and the side walls of the beam body 1 and the space of the cavity 2, reserving stirrups at the formed side walls and the top of the space of the cavity 2, and then maintaining for 7 days for forming; the stirrup is a U-shaped stirrup, the total length of the stirrup is the length of the closed stirrup, and two ends of the stirrup are upwards exposed out of the side wall and the top of the space of the cavity 2;
s3: putting the corrugated plate 3 and damping particles; the corrugated plate 3 is composed of a plate body 301, a plurality of recesses 302 and protrusions 303 which are staggered and arranged on the plate body 301 in parallel and are smoothly connected with each other, the plate body 301 is a polycarbonate plate with the thickness of 3mm, the height difference between the bottom end of each recess 302 and the top end of each protrusion 303 is 40mm, and the distance between each adjacent recess 302 and each adjacent protrusion 303 is 200 mm; the damping particles are I-type recycled aggregate with the sphericity not lower than 0.95, the particle size is 60-80mm, and 18 damping particles are placed in each cavity 2;
s4: the ABS plastic plate with the thickness of 4mm is covered at the top opening of the cavity 2, the edge of the ABS plastic plate exceeds the top opening of the cavity 2 by 10mm to serve as a top pouring template, the top steel reinforcement framework is bound based on the reserved stirrups, the top of the beam body 1 is poured, and the damping energy dissipation beam is obtained after 28-day maintenance and forming.
The embodiment further comprises evaluating the anti-seismic performance of the damping energy consumption beam based on simulation, and the specific process is as follows:
1. simulation method
And obtaining the damping performance of the beam under the back-and-forth loading by adopting a simulation model for manufacturing a reduced proportion and a method for calculating dynamics. The calculation was performed using PFC software. The friction coefficient of the polycarbonate plate is 0.3, and the density of the recycled coarse aggregate is 2600kg/m3The concrete has an elastic modulus of 30GPa and a density of 2500kg/m3. The load is loaded for one cycle. The supporting mode of the beam is simple, and the supporting points on the left side and the right side are 20mm away from the beam end respectively. A vertical displacement is applied in the middle of the beam. Wherein the beam model is a plane beam model, the length is 900mm, the height is 100mm, the cavity width is 128mm, the height is 65mm, and the wall thickness between adjacent cavities 2 is 20 mm.
Comparative example:
damping particles are not placed in the cavity, and the conditions of other models are the same.
2. Simulation result
The vertical displacement applied in the middle is shown in fig. 2. The response of the beam measured for the control example without the addition of recycled concrete particles is shown in fig. 3. It can be seen from figure 3 that the beam, after the applied shock load is complete, has an increased rate of stress change and will continue to vibrate for some time before damping. Fig. 4 shows that the vibration of the beam to which the recycled concrete particles were added was large at the moment of application of the load, and thereafter a relatively constant stress change rate was maintained, indicating that the vibration performance of the beam was significantly improved after the addition of the recycled concrete particles.
In conclusion, the recycled concrete damping energy dissipation beam disclosed by the invention not only can effectively save natural resources, but also can effectively solve the vibration influence of the structure, and meanwhile, the recycled concrete damping energy dissipation beam has the advantages of low production cost, good stress performance, high construction speed, environmental friendliness and the like. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a recycled concrete damping power consumption roof beam, its characterized in that, this damping power consumption roof beam include roof beam body (1), a plurality of along length direction set up in inside cavity (2) of roof beam body (1), locate buckled plate (3) of cavity (2) bottom to and a plurality of damping granule of locating on buckled plate (3).
2. The recycled concrete damping energy dissipation beam as recited in claim 1, wherein the beam body (1) is made of a fiber recycled concrete material, and the fiber recycled concrete material comprises the following components in parts by weight:
1 part of cement; 0-0.4 part of natural coarse aggregate; 1.5-3.3 parts of regenerated coarse aggregate; 1.4-2.6 parts of river sand; 0.3-0.4 part of water; 0.04-0.1 part of fiber; 0.002-0.018 portion of water reducing agent.
3. The recycled concrete damping energy dissipating beam of claim 2, wherein the cement is P.O 42.5.5 grade Portland cement; the fineness modulus of the river sand is 2.4-3.1; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 25-50%; the fiber is one of polyacrylonitrile fiber, polyester fiber or polypropylene fiber, and the length of the fiber is 3-9 mm; the particle size of the natural coarse aggregate is 5-25m, and the recycled coarse aggregate is I-type recycled aggregate or II-type recycled aggregate, and the particle size is 5-25 mm.
4. The recycled concrete damping energy dissipation beam as recited in claim 1, wherein the damping particles are recycled aggregate particles with sphericity of not less than 0.95, have a particle size of 60-80mm, and are made of class I recycled aggregates.
5. The recycled concrete damping dissipative beam of claim 4, wherein the filling rate of the damping particles in the cavity (2) is 10 to 30%.
6. The recycled concrete damping energy dissipation beam as claimed in claim 1, wherein the total volume of the plurality of cavities (2) is 40-50% of the total volume of the beam body (1); the wall thickness between the adjacent cavities (2) is not less than 60 mm.
7. The recycled concrete damping energy dissipation beam as claimed in claim 1, wherein the corrugated plate (3) is composed of a plate body (301) and a plurality of recesses (302) and protrusions (303) arranged on the plate body (301) in a staggered and parallel manner.
8. The recycled concrete damping energy dissipation beam as claimed in claim 7, wherein the plate body (301) is a polycarbonate plate with a thickness of 2-4mm, the recess (302) is smoothly connected with the front of the protrusion (303), the height difference between the bottom end of the recess (302) and the top end of the protrusion (303) is 30-40mm, and the distance between the adjacent recess (302) and protrusion (303) is 180-240 mm.
9. The method for preparing a recycled concrete damping energy dissipating beam as claimed in any one of claims 1 to 8, wherein the method comprises the steps of:
1) binding a steel bar framework, pouring and maintaining the bottom and the side walls of the formed beam body (1) and the space of the cavity (2), and reserving stirrups at the formed side walls and the top of the space of the cavity (2);
2) putting the corrugated plate (3) and damping particles;
3) binding a top steel reinforcement framework based on the reserved stirrups, pouring and maintaining the top of the formed beam body (1), and obtaining the damping energy dissipation beam.
10. The method for preparing the recycled concrete damping energy dissipation beam as claimed in claim 9, wherein in the step 1), the used stirrups are U-shaped stirrups, and two ends of each stirrup are upwards exposed to form a side wall and a spacing top of the cavity (2);
and 3) before binding the top steel reinforcement framework, covering the top opening position of the cavity (2) with a plastic plate, and then binding and pouring.
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| CN202111661289.8A CN114250879B (en) | 2021-12-31 | 2021-12-31 | Recycled concrete damping energy dissipation beam and preparation method thereof |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04250241A (en) * | 1990-12-27 | 1992-09-07 | Takenaka Komuten Co Ltd | Damping beam |
| CN2359367Y (en) * | 1998-05-20 | 2000-01-19 | 郭宝玉 | Nonbearing hollow lintel |
| US20040264055A1 (en) * | 2003-06-30 | 2004-12-30 | Seagate Technology Llc | Suspension load beam with a composite damping core |
| CN102817423A (en) * | 2012-09-11 | 2012-12-12 | 同济大学 | Buffer-type suspension-type particle tuning quality damper |
| CN106013490A (en) * | 2016-06-13 | 2016-10-12 | 同济大学 | Anti-collapse particle type damping beam |
| CN206174177U (en) * | 2016-10-18 | 2017-05-17 | 中国建筑第八工程局有限公司 | Corner brace type lead particle rubber damper |
| CN206408775U (en) * | 2017-01-11 | 2017-08-15 | 同济大学 | Recover function beam with damping |
| WO2017152211A1 (en) * | 2016-03-11 | 2017-09-14 | Gerhard Grabner | Floor structure |
| CN109279843A (en) * | 2018-12-08 | 2019-01-29 | 曙光装配式建筑科技（浙江）有限公司 | A kind of environmental friendly regenerated concrete and preparation method thereof |
| CN212688579U (en) * | 2019-08-30 | 2021-03-12 | 陕西九域通创轨道系统技术有限责任公司 | Vibration and noise reduction device for track floating plate |
| CN113293930A (en) * | 2021-05-20 | 2021-08-24 | 武汉大学 | UHPC pipe restraint recycled concrete post externally pasted with FRP cloth |
-
2021
- 2021-12-31 CN CN202111661289.8A patent/CN114250879B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04250241A (en) * | 1990-12-27 | 1992-09-07 | Takenaka Komuten Co Ltd | Damping beam |
| CN2359367Y (en) * | 1998-05-20 | 2000-01-19 | 郭宝玉 | Nonbearing hollow lintel |
| US20040264055A1 (en) * | 2003-06-30 | 2004-12-30 | Seagate Technology Llc | Suspension load beam with a composite damping core |
| CN102817423A (en) * | 2012-09-11 | 2012-12-12 | 同济大学 | Buffer-type suspension-type particle tuning quality damper |
| WO2017152211A1 (en) * | 2016-03-11 | 2017-09-14 | Gerhard Grabner | Floor structure |
| CN106013490A (en) * | 2016-06-13 | 2016-10-12 | 同济大学 | Anti-collapse particle type damping beam |
| CN206174177U (en) * | 2016-10-18 | 2017-05-17 | 中国建筑第八工程局有限公司 | Corner brace type lead particle rubber damper |
| CN206408775U (en) * | 2017-01-11 | 2017-08-15 | 同济大学 | Recover function beam with damping |
| CN109279843A (en) * | 2018-12-08 | 2019-01-29 | 曙光装配式建筑科技（浙江）有限公司 | A kind of environmental friendly regenerated concrete and preparation method thereof |
| CN212688579U (en) * | 2019-08-30 | 2021-03-12 | 陕西九域通创轨道系统技术有限责任公司 | Vibration and noise reduction device for track floating plate |
| CN113293930A (en) * | 2021-05-20 | 2021-08-24 | 武汉大学 | UHPC pipe restraint recycled concrete post externally pasted with FRP cloth |
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| CN114250879B (en) | 2023-03-31 |
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