CN111608458A - Explosion-proof shock wave polymer composite masonry structure - Google Patents
Explosion-proof shock wave polymer composite masonry structure Download PDFInfo
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- CN111608458A CN111608458A CN202010422412.XA CN202010422412A CN111608458A CN 111608458 A CN111608458 A CN 111608458A CN 202010422412 A CN202010422412 A CN 202010422412A CN 111608458 A CN111608458 A CN 111608458A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/04—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against air-raid or other war-like actions
- E04H9/10—Independent shelters; Arrangement of independent splinter-proof walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
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Abstract
The invention discloses an explosion-blast-resistant polymer composite masonry structure which comprises a masonry wall, a cement mortar layer and a polymer spray coating layer. The surface of the masonry wall is coated with a cement mortar layer, the surface of the cement mortar layer is sprayed with a polymer coating, and the polymer coating covers a concrete ground or ground tie beam, a reinforced concrete upright post or constructional column, a reinforced concrete beam or lintel connected with the wall. The polyurethane polymer with high elastic modulus and tensile strength is compounded on the surface of the common masonry wall, so that the anti-explosion shock wave capability of the masonry wall can be obviously improved, and the scattering and throwing conditions of fragments are eliminated, so that the purposes of protecting the safety of personnel and facilities in a building and reducing the internal safety distance are achieved, the construction process is simple, and the polyurethane polymer is suitable for the reconstruction of new workshops and old workshops.
Description
Technical Field
The invention relates to the technical field of explosion impact and engineering protection, in particular to an explosion shock wave resistant polymer composite masonry structure.
Background
The shock wave is one of the most main damage effects of an explosion accident, has the characteristics of large damage range and strong capability, and can damage buildings in a certain distance range around the building, in order to eliminate the possibility of the expansion of the accident loss, a distance protection method is generally adopted, namely, the minimum safety distance between the building in a dangerous area and a potential explosion dangerous place is specified, so that the building can not be damaged to more than a medium degree when the accidental explosion accident occurs, and the minimum allowable distance is generally called as the internal safety distance.
The safe internal distance is determined by the maximum explosive equivalent of the potentially explosive hazard, the blast resistance of the building and the allowable damage level, and the blast resistance of the building is determined by its structural form, particularly the exterior wall envelope form. The anti-explosion shock wave capability of the building outer wall structure is improved, and the anti-explosion shock wave structure is very favorable for reducing the internal safety distance and the explosion accident loss undoubtedly.
The enclosure structure of the outer walls of most of industrial and civil buildings in China adopts a masonry structure, and the structure can collapse, throw fragments (bricks) and scatter under the action of explosive shock waves, so that casualties or property loss inside the structure can be caused, even dangerous explosive substances inside the structure can be exploded, and the accident scale and loss can be enlarged.
At present, the anti-explosion modification technology for the anti-explosion shock wave of a masonry wall mainly comprises two types of pasting carbon fiber (cloth) on the surface of the wall and adding a steel wire mesh. The method adopting the carbon fiber has the defects of high cost and general antiknock effect; the method of adding the steel wire mesh has the defects that the construction is complex, and the fiber cloth and the steel wire mesh cannot achieve the effect of bonding with a wall body. Bonding carbon fiber cloth for structural reinforcement is mainly used for beams, columns and parts with small volume and stress concentration of key nodes; the wall surface is covered with the carbon fiber in an adhesion mode for anti-explosion reinforcement, the function of the carbon fiber for tightly hooping the member is difficult to play, and the surface force is conducted between the masonry and the carbon fiber by the adhesive. When accidental explosion accidents occur, the carbon fiber cloth is likely to be separated from the edge integrally, so that the reinforcing effect cannot be achieved due to the fact that the effect of the adhesive is uneven and the reinforcing effect is difficult to guarantee.
Based on the above, the invention designs an explosion-proof shock wave polymer composite masonry structure, a layer of polyurethane polymer with higher elastic modulus and tensile strength is compounded on the surface of a common masonry wall, the explosion-proof shock wave capability of the masonry wall is obviously improved, and the condition of fragment scattering and throwing is eliminated, so that the purposes of protecting the safety of personnel and facilities in a building and reducing the internal safety distance are achieved, the construction process is simple, and the invention can be used for not only newly-built buildings, but also the reconstruction of old buildings, and solves the problems.
Disclosure of Invention
The present invention is directed to a blast-resistant polymer composite masonry structure, which solves the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the bottom of the masonry wall is embedded into a foundation bearing layer in a strip foundation mode, the top of the masonry wall is in lap joint with a reinforced concrete beam in an angle brick mode, two sides of the masonry wall are connected with a reinforced concrete upright post through a bracing wall bar in a pulling mode, the inner side of the masonry wall is a masking place, the outer side of the masonry wall is an explosion place, a cement mortar layer is coated on the inner side of the masonry wall, a polymer coating is sprayed on the surface of the cement mortar layer, and the polymer coating is uniformly sprayed along the surface of the reinforced concrete beam, the surface of the cement mortar layer, the surface of a concrete ground and the surface of the reinforced concrete upright post.
Preferably, the outside of the masonry wall is sprayed with a polymer coating, and the polymer coating is uniformly sprayed along the surface of the reinforced concrete beam, the surface of the outside of the masonry wall, the concrete floor and the surface of the reinforced concrete column.
Preferably, the polymer coating is a polyurethane elastomer formed by the reaction of an isocyanate component and an amino compound component.
Preferably, the masonry wall is a common masonry wall.
Preferably, the manufacturing method of the polymer composite masonry structure comprises the following steps:
s1, cleaning the surfaces of the inner side concrete ground, the reinforced concrete beam and the reinforced concrete upright post, and roughening to prevent the composite masonry structure from overall collapsing due to the connection failure of the polymer coating, the concrete ground and the reinforced concrete beam under the action of shock waves;
s2, smearing a cement mortar layer on the inner side surface of the masonry wall, wherein the smearing thickness of the cement mortar layer is 16-20 mm, trowelling the surface of the cement mortar layer to enable the surface of the cement mortar layer not to have obvious bulges and depressions, and uniformly spraying polymer coatings on the surface of the cement mortar layer, the inner side surface of the reinforced concrete beam, the concrete floor and the inner side surface of the reinforced concrete upright post to finish inner side single-side spraying;
s3, plastering mortar joints on the outer side surface of the masonry wall, cleaning the outer side surface of the masonry wall, the concrete ground, the outer side surface of the reinforced concrete beam and the outer side surface of the reinforced concrete column, and uniformly spraying a polymer coating.
Preferably, the polymer coating is sprayed to a thickness of 4mm or more, and the thickness control of the coating is realized by the flow rate control of a spraying device.
Compared with the prior art, the invention has the beneficial effects that:
1. aiming at the characteristics of large rigidity and small ductility of a masonry structure, the polymer coating is used for tying a masonry wall cracked by mortar joints under the action of explosive shock waves by utilizing the characteristics that a special polymer has certain rigidity and large ductility (the fracture elongation is more than 150%), so that the explosive shock wave resistance is improved.
2. The invention aims at the damage mode of the masonry structure under the action of the explosive shock wave, namely: the mortar joint is mainly destroyed, so that the connection between the building blocks is failed, the structure is locally or wholly destroyed, the building blocks which are not restrained are thrown towards the inside of the building under the action of shock waves, and the stress transmitted to the polymer coating is redistributed by utilizing the characteristics of small strength, small ductility and small bonding strength of the cement mortar layer, so that the polymer coating at the mortar joint is prevented from being broken due to stress concentration.
3. Aiming at the characteristics that the strength of the reinforced concrete upright post, the constructional column, the floor slab, the ground and other structures is higher than that of a masonry structure and the bonding strength with the polymer is high (not less than 3Mpa), the polymer covers the inner surfaces of the structures, and the polymer coating is prevented from being connected with the structures to fail so as to prevent the overall collapse.
4. The invention is mainly determined according to the calculation result of the force effect of the masonry wall under the action of the explosive load in the aspect of controlling the thickness of the polymer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic vertical sectional view of a single-sided composite wall according to the present invention;
FIG. 2 is a schematic vertical sectional view of a double-sided composite wall according to the present invention;
FIG. 3 is a schematic horizontal cross-sectional view of a single-sided composite wall according to the present invention;
FIG. 4 is a schematic horizontal cross-sectional view of a double-sided composite wall according to the present invention;
FIG. 5 is a schematic representation of a single-sided spray-coated polymer of the present invention after impact of an explosion;
FIG. 6 is a schematic view of a dry wall according to the present invention after being impacted by an explosion;
FIG. 7 is a schematic view of a wall coated with a polymer on both sides of the wall according to the present invention after an explosive impact;
FIG. 8 is a schematic view of a dry wall of the present invention after being impacted by an explosion;
FIG. 9 is a schematic representation of a single-sided spray-coated polymer of the present invention after impact of an explosion;
FIG. 10 is a schematic view of a dry wall of the present invention after being impacted by an explosion;
FIG. 11 is a schematic representation of a single-sided spray-coated polymer of the present invention after impact of an explosion;
fig. 12 is a schematic view of the dry wall of the present invention after being impacted by an explosion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides two solutions for the blast-resistant polymer composite masonry structure:
1) the single-face composite wall comprises a masonry wall 1, wherein the masonry wall 1 is connected with a concrete floor 5 at the ground height, the top of the masonry wall 1 is in lap joint with a reinforced concrete beam 4 in an angle joint brick mode, two sides of the masonry wall 1 are both tied with a reinforced concrete upright post 6 through a wall-pulling reinforcement, the inner side of the masonry wall 1 is a sheltering place, the outer side of the masonry wall is an explosion place, the inner side of the masonry wall 1 is coated with a cement mortar layer 2, a polymer coating 3 is sprayed on the surface of the cement mortar layer 2, the polymer coating 3 is uniformly sprayed along the reinforced concrete beam 4, the cement mortar layer 2, the concrete floor 5 and the reinforced concrete upright post 6, and the single-face polymer spraying is usually applied to the condition of small dosage and can meet the requirement of local damage.
2) The inner side spraying method of the double-sided composite wall body is the same as that of the single-sided composite wall body in the step 1). The polymer coating 3 is sprayed on the outer side surface of the masonry wall 1, and the polymer coating 3 is uniformly sprayed along the outer side surfaces of the reinforced concrete beam 4, the masonry wall 1, the concrete floor 5 and the reinforced concrete upright post 6; and aiming at the possible overall response and rebound of the wall body under the condition of accidental explosion of large amount of explosive, a double-sided spraying scheme is adopted.
The masonry wall 1 is a common masonry wall, and is designed according to masonry structure design specification GB50003, and meets the quality requirements of masonry structure engineering construction quality acceptance specification GB 50203.
The manufacturing method of the polymer composite masonry structure comprises the following steps:
s1, cleaning the surfaces of the inner side concrete ground 5, the reinforced concrete beam 4 and the reinforced concrete upright post 6, and roughening to prevent the composite masonry structure from overall collapsing due to the connection failure of the polymer coating, the concrete ground and the reinforced concrete beam under the action of shock waves;
s2, smearing a cement mortar layer 2 on the inner side surface of the masonry wall, wherein the smearing thickness of the cement mortar layer 2 is 16-20 mm, performing trowelling treatment on the surface of the cement mortar layer 2 to enable the surface of the cement mortar layer 2 to have no obvious protrusions and depressions, and uniformly spraying a polymer coating 3 on the surface of the cement mortar layer 2, the inner side surface of the reinforced concrete beam 4, the concrete floor 5 and the inner side surface of the reinforced concrete upright post 6 to finish inner side single-side spraying;
s3, trowelling the mortar joints on the outer side surface of the masonry wall 1, cleaning the outer side surface of the masonry wall 1, the concrete floor 5, the outer side surface of the reinforced concrete beam 4 and the outer side surface of the reinforced concrete upright post 6, and uniformly spraying the polymer coating. The spraying thickness of the polymer coating 3 is more than 4mm, the thickness control of the coating is realized by controlling the flow of the spraying device, the spraying flow directly influences the impact resistance of the polymer, and the spraying of the polymer of the masonry structure is divided into three steps: polymer preparation, wall surface treatment and polymer spraying. The preparation of the polymer mainly aims at the parameters of storage and filling of polymer double components, spraying process temperature, pressure and the like to control; the surface treatment of the wall body mainly aims at cleaning, trowelling and galling of the masonry; the polymer spraying is mainly aimed at the methods of workers in the coating construction process, such as: and (5) pressing a gun, shielding and the like to ensure the uniformity of the spraying thickness.
Example 1
As shown in fig. 5-6, the peak pressure of the shock wave is about 0.1624MPa for the failure of the light masonry wall 13m from the detonation source after 100kgTNT detonation, where fig. 5 is a 4mm single face polymer-coated wall and fig. 6 is a dry wall, and it can be seen from the results: the lower part of the wall body with the single-side polymer sprayed on the left side is bent inwards by 70cm, the mortar joints of the wall body along the yield line are all broken, the top sloping bricks are protruded, the mortar joint connection fails, the wall body does not collapse, and no fragment scatters on one side of a shelter; the wall body of the right dry wall is cut at the middle third part of the span, the wall body basically collapses completely, and the tie bars are exposed.
Example 2
As shown in FIGS. 7-8, the peak pressure of the shock wave is about 0.0823MPa after 10000kg of TNT explosion and 70m of the normal brick wall and the polymer composite brick wall from the explosion source. The results show that: FIG. 7 shows that the wall body sprayed with polymer on both sides has a 2cm dent, and the back burst side is not obviously damaged; FIG. 8 shows the wall body of the dry wall is broken in a way of approaching three sections to fix a free section, a small amount of cracks appear on the side constructional column, and a crack of about 2.5cm appears at a position 75cm away from the ground.
Example 3
As shown in FIGS. 9-10, the peak shock wave pressure is 0.2604MPa after 560kgTNT explosion and for the general brick wall 17m from the explosion source. The results show that: FIG. 9 is a single-side sprayed polymer, the explosion-facing surface has cracks, and the maximum width is about 2 cm; in FIG. 10, the dry wall is nearly 60% collapsed, and the flying distance of the throws formed by the broken pieces of the wall is more than 5 m.
Example 4
As shown in FIGS. 11-12, the peak value of the shock wave pressure at the dry wall (FIG. 12) was measured to be 0.04273MPa, and the peak value of the shock wave pressure at the single-side sprayed polymer light masonry wall (FIG. 11) was 0.06946MPa, for the case of the light masonry wall failure at different distances from the explosion source after explosion with 3000kg of explosive. As can be seen from the damage conditions, both the FIGS. 11 and 12 belong to 4-grade damage, the building blocks partially fall off, and the damage of the dry wall is relatively serious, and the results prove that the explosion-resistant impact wave resistance of the light brick wall is remarkably improved by spraying the explosion-resistant polymer, the single-side spraying effect is obviously better than that of the dry wall, and the overpressure of the impact wave resistance can be improved by over 50 percent.
In the invention, the spraying of the anti-knock polymer can provide different schemes according to different working conditions and the structure of the existing workshop. In combination with the tests already carried out, various technical solutions can be proposed:
1. steel construction factory building antiknock reinforcement composite construction: the antiknock polymer + sandwich steel plate enclosure structure;
2. civil architecture antiknock reinforcement composite construction: an antiknock polymer + composite light plate structure;
3. the process equipment antiknock composite structure: antiknock polymer + metal shell structure.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. An anti-blast shock wave polymer composite masonry structure, includes masonry wall (1), its characterized in that: the masonry wall is characterized in that the bottom of the masonry wall (1) is connected with a concrete ground (5), the top of the masonry wall (1) is connected with a reinforced concrete beam (4), two sides of the masonry wall (1) are connected with reinforced concrete columns (6) in a pulling mode, the inner side of the masonry wall (1) is a sheltering place, the outer side of the masonry wall (1) is an explosion place, a cement mortar layer (2) is coated on the surface of the masonry wall (1), a polymer coating (3) is sprayed on the surface of the cement mortar layer (2), and the polymer coating (3) covers the reinforced concrete beam (4), the cement mortar layer (2), the concrete ground (5) and the reinforced concrete columns (6).
2. The blast resistant polymer composite masonry unit system according to claim 1 wherein: the polymer coating (3) is sprayed on the surface of the masonry wall (1), and the polymer coating (3) covers the reinforced concrete beam (4), the surface of the masonry wall (1), the concrete floor (5) and the reinforced concrete upright post (6).
3. The blast resistant polymer composite masonry unit structure according to claim 2 wherein: the polymer coating (3) is a polyurethane elastomer substance generated by the reaction of an isocyanate component and an amino compound component.
4. The blast resistant polymer composite masonry unit system according to claim 1 wherein: the masonry wall (1) is a common masonry wall.
5. The blast resistant polymer composite masonry unit structure according to claims 1-4 wherein: the manufacturing method of the polymer composite masonry structure comprises the following steps:
s1, cleaning the surfaces of the concrete ground (5), the reinforced concrete beam (4) and the reinforced concrete upright post (6), and roughening the surfaces to prevent the connection failure of the polymer coating (3) with the concrete ground (5), the reinforced concrete beam (4) and the reinforced concrete upright post (6) under the action of shock waves;
s2, smearing a cement mortar layer (2) on the inner side surface of a masonry wall (1), wherein the smearing thickness of the cement mortar layer (2) is 16-20 mm, smearing treatment is carried out on the surface of the cement mortar layer (2), so that the cement mortar layer (2) has no obvious bulges and depressions on the surface, and polymer coatings are uniformly sprayed on the inner side surfaces of a reinforced concrete beam (4), the cement mortar layer (2), a concrete floor (5) and a reinforced concrete upright post (6) to finish inner side single-side spraying;
s3, plastering mortar joints on the outer side surface of the masonry wall (1), cleaning the outer side surfaces of the masonry wall (1), the concrete floor (5), the reinforced concrete beam (4) and the reinforced concrete upright post (6), and uniformly spraying a polymer coating.
6. The blast resistant polymer composite masonry unit system according to claim 5, wherein: the spraying thickness of the polymer coating (3) is more than 4mm, and the thickness control of the coating is realized through the flow control of a spraying device.
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| CN202010422412.XA CN111608458A (en) | 2020-05-19 | 2020-05-19 | Explosion-proof shock wave polymer composite masonry structure |
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|---|---|---|---|---|
| US20040123541A1 (en) * | 2002-12-27 | 2004-07-01 | Jewett Scott E. | Reinforced wall structure for blast protection |
| CN102203372A (en) * | 2008-10-27 | 2011-09-28 | 拜尔材料科学有限公司 | High-energy impact absorbing polycarbonate mounting method |
| CN107355026A (en) * | 2017-09-13 | 2017-11-17 | 沈阳建筑大学 | The shellproof blast wall of lightweight power consumption |
| CN107842125A (en) * | 2017-09-13 | 2018-03-27 | 沈阳建筑大学 | High strength anti-explosion wall with shock-absorbing capacity |
| CN111021566A (en) * | 2019-12-06 | 2020-04-17 | 上海爵格工业工程有限公司 | Masonry antiknock structure |
-
2020
- 2020-05-19 CN CN202010422412.XA patent/CN111608458A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040123541A1 (en) * | 2002-12-27 | 2004-07-01 | Jewett Scott E. | Reinforced wall structure for blast protection |
| CN102203372A (en) * | 2008-10-27 | 2011-09-28 | 拜尔材料科学有限公司 | High-energy impact absorbing polycarbonate mounting method |
| CN107355026A (en) * | 2017-09-13 | 2017-11-17 | 沈阳建筑大学 | The shellproof blast wall of lightweight power consumption |
| CN107842125A (en) * | 2017-09-13 | 2018-03-27 | 沈阳建筑大学 | High strength anti-explosion wall with shock-absorbing capacity |
| CN111021566A (en) * | 2019-12-06 | 2020-04-17 | 上海爵格工业工程有限公司 | Masonry antiknock structure |
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