CN110984609B - Method for improving earthquake resistance of building masonry - Google Patents
Method for improving earthquake resistance of building masonry Download PDFInfo
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- CN110984609B CN110984609B CN201911168002.0A CN201911168002A CN110984609B CN 110984609 B CN110984609 B CN 110984609B CN 201911168002 A CN201911168002 A CN 201911168002A CN 110984609 B CN110984609 B CN 110984609B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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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
- E04H9/02—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 withstanding earthquake or sinking of ground
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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
- E04H9/02—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 withstanding earthquake or sinking of ground
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
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Abstract
The invention relates to a method for improving the earthquake resistance of building brickwork, which is characterized in that an angle steel pull rod is fixed at the top end of an indoor transverse wall of a building, one limb of the angle steel pull rod is fixedly connected with the indoor transverse wall, the other limb of the angle steel pull rod is tightly attached to an indoor roof surface, two ends of the angle steel pull rod extend into an indoor longitudinal wall and are fixedly connected with a steel plate embedded in a groove of the wall body, a plastering layer is removed from the outer wall surface of the indoor wall body of the building facing a public area and the inner and outer wall surfaces of the outer wall of the building, and high-ductility mortar is used for plastering.
Description
Technical Field
The invention relates to the technical field of civil construction, in particular to a method for improving the earthquake resistance of building brickwork.
Background
The masonry structure is the most common structural form in the existing buildings, but as a large number of existing buildings are long-term in construction and the strength of masonry mortar is low, the seismic performance of the masonry structure can not meet the requirements of the existing specifications. The traditional seismic strengthening method for the masonry structure comprises a double (single) face reinforcing mesh method, additionally arranged pull rods, constructional columns and the like. Existing buildings that are typically in use do not want construction teams to enter the room (or enter the room less) in view of personal privacy and damage to the original installation. The use of the high-ductility concrete and the high-ductility mortar provides a new idea for seismic reinforcement of masonry structures. The novel material is added with PVA fiber besides common concrete components such as cement, sand, fly ash, water reducing agent, water and the like, so that the ductility of the material is obviously improved, and the novel material has stronger energy dissipation and shock absorption effects when an earthquake occurs. In a low-rise (single-story or double-story) masonry structure building, a good earthquake-resistant reinforcing effect can be achieved by using an outer wall ductile concrete plastering method. However, the inventor finds that for a multi-layer masonry structure, with the increase of earthquake effect, the requirement of earthquake resistance cannot be met by only plastering the outer wall with high-ductility mortar, and meanwhile, in consideration of reducing disturbance to residents, other earthquake-resistant measures must be adopted to achieve the aim of earthquake resistance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for improving the earthquake-resistant performance of building brickwork, so that the earthquake-resistant performance of the brickwork is improved under the condition of reducing disturbance to residents to the maximum extent.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for improving earthquake resistance of building brickwork comprises the steps of fixing an angle steel pull rod at the top end of an indoor transverse wall of a building, fixedly connecting one limb of the angle steel pull rod with the indoor transverse wall, enabling the other limb of the angle steel pull rod to be attached to an indoor roof floor slab, enabling two ends of the angle steel pull rod to extend into indoor longitudinal walls and to be fixedly connected with steel plates embedded into grooves of walls, removing a plastering layer on the outer wall surface of the indoor wall of the building facing a public area and the inner and outer wall surfaces of the outer wall of the building, and plastering by using high-ductility mortar.
Further, the method for improving the earthquake resistance of the building masonry comprises the following specific steps:
step 1: a groove is formed in the outer wall surface of the wall body at the cross part of the indoor transverse wall and the indoor longitudinal wall, a steel plate is placed in the groove, and the steel plate is arranged close to the groove surface of the groove.
Step 2: holes are drilled in the indoor vertical wall, and the steel plate is exposed from the indoor side.
And step 3: and (3) fixing an angle steel pull rod at the top of the wall surface on one side of the indoor transverse wall facing the indoor area, wherein one limb of the angle steel pull rod is fixedly connected with the indoor transverse wall, the other limb of the angle steel pull rod is tightly attached to the indoor roof floor slab, and two ends of the angle steel pull rod extend into the drilled holes in the indoor longitudinal wall in the step (2) and are fixedly connected with the steel plate.
And 4, step 4: and removing a plastering layer on the outer wall surface of the indoor wall body facing the public area, plastering by using high-ductility mortar, removing the plastering layer on the inner wall surface and the outer wall surface of the building outer wall, and plastering by using high-ductility mortar.
Further, in the step 1, the depth of the groove is equal to the thickness of the steel plate.
Further, in the step 1, the length of the groove is equal to the story height of the building, and the length of the steel plate is equal to the story height of the building.
Further, before step 4 goes on, fixed a plurality of reinforcing bars on the steel sheet, a plurality of reinforcing bars are along vertical setting, and when step 4 goes on, bury a plurality of reinforcing bars inside high ductility mortar plastering layer.
Furthermore, the end part of the angle steel pull rod is fixedly connected with the steel plate by plug welding.
Further, all towards the first indoor cross wall of indoor zone to both sides wall, angle steel pull rod is all fixed at its both sides wall top, bore on first indoor cross wall and establish the through-hole that matches with the mounting hole on the angle steel pull rod, the through-hole runs through two side wall faces of first indoor cross wall, pass first indoor cross wall and two angle steel pull rods through the mounting hole on through-hole and the angle steel pull rod with the double-screw bolt, and screw the nut at both ends, the nut compresses tightly the angle steel pull rod on the wall of first indoor cross wall.
Furthermore, for a second indoor transverse wall with one side wall facing the outdoor area, the angle steel pull rod is fixed on the top of the wall facing the indoor, a hole matched with the mounting hole in the angle steel pull rod is drilled in the second indoor transverse wall, an expansion bolt penetrates through the angle steel pull rod and extends into the second indoor transverse wall, a nut is screwed on the expansion bolt, and the angle steel pull rod is tightly pressed on the wall of the second indoor transverse wall by the nut.
Furthermore, a plurality of mounting holes are formed in the angle steel pull rod, and the distance between the mounting holes is 1mm-2 mm.
Furthermore, the surface of the angle steel pull rod facing the indoor area is coated with a decorative coating, so that the indoor decorative effect is not influenced.
The invention has the beneficial effects that:
1. according to the method for improving the earthquake resistance of the building masonry, the angle steel pull rod is additionally arranged on the indoor transverse wall, two ends of the angle steel pull rod are fixedly connected with the steel plate embedded in the wall groove, and the high-ductility mortar smeared on the outer wall and the indoor wall facing the public area outer wall is combined to play an earthquake resistance role together.
2. According to the method for improving the earthquake resistance of the building masonry, indoor construction is only carried out by installing the angle steel pull rod, and other constructions are carried out outdoors, so that interference on residents is reduced to the greatest extent.
3. According to the method for improving the earthquake resistance of the building masonry, the steel plate is welded with the plurality of reinforcing steel bars embedded with the high-ductility mortar plastering layer, so that the anchoring strength of the steel plate and the high-ductility mortar plastering layer on the cavity wall surface is effectively improved, and the earthquake resistance is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic plan view of the masonry of a building to be reinforced according to the present invention;
FIG. 2 is a schematic plan view of the reinforced masonry of the building according to embodiment 1 of the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 2 according to the present invention;
FIG. 4 is an enlarged view of the invention at B in FIG. 2;
FIG. 5 is an enlarged view of the invention at C of FIG. 2;
FIG. 6 is an elevation view of angle steel tie installation on two sides of a first indoor transverse wall in accordance with embodiment 1 of the present invention;
fig. 7 is a schematic view illustrating an assembly of a first indoor horizontal wall and an angle iron drawbar in embodiment 1 of the present invention;
fig. 8 is a schematic view illustrating an assembly of a second indoor horizontal wall and an angle iron drawbar according to embodiment 1 of the present invention;
the building comprises an indoor area 1, an outdoor area 2, an indoor longitudinal wall 3, a second indoor transverse wall 4, a first indoor transverse wall 5, a stair 6, a first groove 7, a second groove 8, a third groove 9, a fourth groove 10, a fifth groove 11, a sixth groove 12, a steel plate 13, an angle steel pull rod 14, a roof floor 15, a stud 16, a first nut 17, an expansion bolt 18, a second nut 19, a reinforcing steel bar 20 and a high-ductility mortar plastering layer 21.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As introduced in the background art, for a multi-layer masonry structure, the requirement for earthquake resistance cannot be met by only plastering the outer wall with high-ductility mortar, and meanwhile, in view of reducing disturbance to residents, the aim of earthquake resistance can be achieved only by adopting other earthquake-resistant measures.
In an exemplary embodiment of the present application, as shown in fig. 1, a method for improving seismic performance of a building masonry is disclosed, where the building includes an indoor area 1 and an outdoor area 2, an indoor wall includes two indoor longitudinal walls 3 and second indoor transverse walls 4 located at two ends of the indoor longitudinal walls, a first indoor transverse wall 5 is further disposed at an indoor middle position, the first indoor transverse wall divides an indoor space into two parts, an outdoor area on a right side of the indoor area is provided with a stair 6, the second indoor transverse wall on a left side of the indoor area is used as a part of an outer wall, the indoor longitudinal wall on a lower side of the indoor area is used as a part of the outer wall, and the building is taken as an example to illustrate a method for improving seismic performance of the masonry by using the building, as shown in fig. 2 to 8, the method includes the following steps:
step 1: a groove is formed in the outer wall surface of the wall body at the cross part of the indoor transverse wall and the indoor longitudinal wall, a steel plate is placed in the groove, and the steel plate is arranged close to the groove surface of the groove.
Specifically, in this embodiment, six positions are provided with the grooves.
And a third groove 9 and a fourth groove 10 are respectively formed in the indoor wall body at the intersection position of the two ends of the second indoor transverse wall on the right side and the indoor longitudinal wall, the third groove is formed at the intersection position of the upper side, and the fourth groove is formed at the intersection position of the lower side.
The third groove is an L-shaped groove and comprises two groove portions, one groove portion is arranged on the outer wall surface of the indoor longitudinal wall facing the public area, the other groove portion is arranged on the outer wall surface of the indoor transverse wall facing the public area on the right side, the two groove portions are symmetrically distributed relative to the boundary line of the second indoor transverse wall and the indoor longitudinal wall, the width of the groove portions is 500mm, and the length of the groove portions is equal to the floor height of a building.
The fourth groove is arranged on the outer side face of the outer wall of the building on the right side of the indoor longitudinal wall on the lower side and the indoor longitudinal wall on the lower side, the fourth groove is symmetrically arranged relative to the center line of the second indoor transverse wall on the right side, the width of the fourth groove is 1000mm, and the length of the fourth groove is equal to the floor height of the building.
And the crossing positions of the two ends of the second indoor transverse wall on the left side and the indoor longitudinal wall are provided with a fifth groove 11 and a sixth groove 12, the crossing position of the upper side is provided with the fifth groove, and the crossing position of the lower side is provided with the sixth groove.
The fifth groove is an L-shaped groove and comprises two groove portions, one groove portion is arranged on the outer wall surface of the upper side indoor longitudinal wall facing the public area, the other groove portion is arranged on the inner wall surface of the building outer wall on the upper side of the second indoor transverse wall on the left side, the two groove portions are symmetrically distributed relative to the boundary line of the second indoor transverse wall and the indoor longitudinal wall, the width of the groove portions is 500mm, and the length of the groove portions is equal to the floor height of the building.
The sixth groove is an L-shaped groove and comprises two groove portions, one groove portion is arranged on the outdoor outer wall surface of the indoor longitudinal wall facing the outside of the room and the other groove portion is arranged on the outdoor outer wall surface of the second indoor transverse wall facing the outside of the room, the two groove portions are symmetrically distributed relative to the boundary line of the second indoor transverse wall and the indoor longitudinal wall, the width of the groove portions is 500mm, and the length of the groove portions is equal to the floor height of a building.
After the six grooves are formed, steel plates 13 are placed in the six grooves, the thickness of each steel plate is the same as the depth of each groove, and the length of each steel plate is equal to the floor height of a building.
Specifically, a straight plate-shaped first steel plate is arranged in the first groove, the second groove and the fourth groove, an L-shaped second steel plate is arranged in the third groove, the fifth groove and the sixth groove, and the surfaces of the first steel plate and the second steel plate are tightly attached to the groove surfaces of the corresponding grooves.
Step 2: holes are drilled in the indoor longitudinal wall from the indoor longitudinal wall to the indoor inner side wall surface, and the steel plate is exposed from the indoor side.
And step 3: the angle steel pull rod 14 is fixed at the top position of the wall surfaces on the two sides of the first indoor transverse wall and the top position of the wall surface facing the indoor transverse wall of the second indoor transverse wall, the angle steel pull rod is formed by adopting the existing angle iron and has two limbs which are perpendicular to each other, one limb of the angle steel pull rod is provided with a plurality of mounting holes, and the distance between every two adjacent mounting holes is 1-2 mm.
When the angle steel pull rods on two sides of the first indoor transverse wall are installed, firstly, through holes penetrating through wall surfaces on two sides of the first indoor transverse wall are drilled on the first indoor transverse wall through electric drills, one limbs of the two angle steel pull rods are respectively attached to the wall surfaces of the first indoor transverse wall, the through holes are aligned with the installation holes, the other limbs are attached to the bottom surface of the roof floor slab 15, two ends of the first pull rod stretch into the drilled holes of the indoor longitudinal wall, the studs 16 penetrate into the through holes and the installation holes, the two ends of each stud are in threaded connection with the first nuts 17, the first nuts are rotated, the two angle steel pull rods are tightly pressed on the wall surfaces on two sides of the first indoor transverse wall through the first nuts, and two ends of each angle steel pull rod are fixedly connected with steel plates in the first grooves and the second grooves in a plug welding mode.
When the angle steel pull rod of the inner side wall surface of the second indoor transverse wall is installed, firstly, an opening matched with the installation hole of the angle steel pull rod is drilled on the second indoor transverse wall through an electric drill, the opening is a blind hole, one limb of the angle steel pull rod is attached to the inner side wall surface of the second indoor transverse wall, the opening is aligned with the installation hole, two ends of the angle steel pull rod stretch into the drilled hole of the indoor longitudinal wall, and the other limb of the angle steel pull rod is attached to the bottom surface of the roof floor. And an expansion bolt 18 is inserted into the mounting hole and the opening, a second nut is connected to the expansion bolt in a threaded manner, the second nut 19 is rotated, and the angle steel pull rod is tightly pressed on the inner side wall surface of the second indoor transverse wall by using the second nut. And two ends of the angle steel pull rod are welded and fixed with the steel plate in a plug welding mode.
In the embodiment, decorative coatings such as emulsion paint can be coated on the indoor side surface of the angle steel pull rod, and the indoor decorative effect is not influenced.
And 4, step 4: get rid of the plastering layer to interior wall body towards public regional outer wall face, in to the building outer wall, the plastering layer is got rid of to the outer wall face, reinforcing bar 20 that a plurality of levels of lateral surface welding set up at the steel sheet, reinforcing bar length is 1m, vertical setting is followed to a plurality of reinforcing bars, distance between the adjacent reinforcing bar is 500mm, after the steel bar welding is accomplished, utilize high-ductility mortar to plaster the face towards public regional outer wall face to interior wall body, form high-ductility mortar plaster layer 21, the reinforcing bar is buried inside the high-ductility mortar plaster layer, the anchor strength of steel sheet and high-ductility mortar plaster layer has been improved, the anti-seismic effect has been guaranteed, to the interior of building outer wall, the outer wall face utilizes high-ductility mortar to plaster, form high-ductility mortar plaster layer.
The method for improving the earthquake resistance of the building masonry utilizes the angle steel pull rod, the steel plate and the high-ductility mortar plastering layer to improve the earthquake resistance of the building, and compared with the traditional method for plastering the high-ductility mortar on the outer wall, the method is better in earthquake resistance, only the installation work of the angle steel pull rod with shorter construction time is carried out indoors, the work with longer construction time such as groove forming and high-ductility mortar plastering is carried out outdoors, and the disturbance to residents is reduced to the maximum extent.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. A method for improving the earthquake resistance of building brickworks is characterized in that an angle steel pull rod is fixed at the top end of an indoor transverse wall of a building, one limb of the angle steel pull rod is fixedly connected with the indoor transverse wall, the other limb of the angle steel pull rod is attached to an indoor roof surface, a groove is formed in the outer wall surface of a wall body at the intersection part of the indoor transverse wall and an indoor longitudinal wall, a steel plate is placed in the groove and is attached to the groove surface of the groove, the length of the groove is equal to the floor height of the building, and the length of the steel plate is equal to the floor height of the building;
extending two ends of an angle steel pull rod into an indoor longitudinal wall and fixedly connecting the angle steel pull rod with a steel plate embedded in a wall groove, removing a plastering layer on the outer wall surface of the indoor wall of the building facing a public area and the inner and outer wall surfaces of the outer wall of the building, and plastering by using high-ductility mortar; fixing a plurality of steel bars on a steel plate, vertically arranging the steel bars, and embedding the steel bars into the high-ductility mortar plastering layer;
all towards indoor regional first indoor cross wall to both sides wall, angle steel pull rod is all fixed at its both sides wall top, bore on first indoor cross wall and establish the first through-hole that matches with the mounting hole on the angle steel pull rod, first through-hole runs through two side wall faces of first indoor cross wall, pass first indoor cross wall and two angle steel pull rods through the mounting hole on first through-hole and the angle steel pull rod with the double-screw bolt, and screw the nut at both ends, the nut compresses tightly the angle steel pull rod on the wall of first indoor cross wall.
2. The method of claim 1, further comprising the following steps:
drilling a hole on the indoor longitudinal wall, and exposing the steel plate from one indoor side;
and an angle steel pull rod is fixed at the top of the wall surface on one side of the indoor transverse wall facing the indoor area, one limb of the angle steel pull rod is fixedly connected with the indoor transverse wall, the other limb of the angle steel pull rod is tightly attached to the indoor roof surface, and two ends of the angle steel pull rod extend into the drilled holes in the indoor longitudinal wall and are fixedly connected with the steel plate.
3. The method of claim 1, wherein the depth of the recess is equal to the thickness of the steel plate.
4. The method of claim 2, wherein the ends of the angle steel tie rods are fixedly connected to the steel plates by plug welding.
5. The method of claim 1, wherein a second indoor cross wall facing the outdoor area of the building is fixed with angle steel tie bars at the top of the indoor wall facing the outdoor area, a second through hole matching with the mounting hole of the angle steel tie bar is drilled on the second indoor cross wall, an expansion bolt is inserted through the angle steel tie bar and extends into the second indoor cross wall, a nut is screwed on the expansion bolt, and the nut presses the angle steel tie bar against the wall surface of the second indoor cross wall.
6. The method for improving the seismic performance of building masonry according to claim 1, wherein a plurality of mounting holes are formed in the angle steel tie bar, and the distance between the plurality of mounting holes is 1mm-2 mm.
7. The method for improving earthquake resistance of building masonry according to claim 1, wherein the surface of said angle steel tie bar facing indoor area is coated with decorative coating, without affecting indoor decoration effect.
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| CN201911168002.0A CN110984609B (en) | 2019-11-25 | 2019-11-25 | Method for improving earthquake resistance of building masonry |
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| CN201911168002.0A CN110984609B (en) | 2019-11-25 | 2019-11-25 | Method for improving earthquake resistance of building masonry |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858124A (en) * | 2010-06-07 | 2010-10-13 | 南昌大学 | Novel seismic hardening constructional column of masonry structure |
| CN201908448U (en) * | 2010-07-28 | 2011-07-27 | 上海同华加固工程有限公司 | Novel shock-proof reinforced steel pull rod |
| JP5324688B1 (en) * | 2012-08-20 | 2013-10-23 | 名工建設株式会社 | Seismic reinforcement method |
| CN102926550B (en) * | 2012-10-11 | 2016-09-14 | 北京筑福建筑事务有限责任公司 | System and method for reinforcing masonry structure by using cross wall and flat steel draw bar |
| CN102864944B (en) * | 2012-10-11 | 2016-12-21 | 北京筑福国际工程技术有限责任公司 | A kind of steel angle bracket masonry structure and reinforcement means thereof |
| CN102910871B (en) * | 2012-11-04 | 2014-07-02 | 西安建筑科技大学 | High-ductility mortar |
| CN203066335U (en) * | 2012-12-31 | 2013-07-17 | 深圳市建筑设计研究总院有限公司 | Steel plate-mortar combined structure and reinforcement net thereof |
| CN106150119B (en) * | 2016-07-27 | 2019-09-20 | 姚攀峰 | It is a kind of to industrialize high ductility space constraint reinforced masonry wall system and its construction method |
| CN208267410U (en) * | 2018-05-03 | 2018-12-21 | 贵州中建建筑科研设计院有限公司 | A kind of reconstruction structure of old building |
| CN208534081U (en) * | 2018-05-03 | 2019-02-22 | 贵州中建建筑科研设计院有限公司 | A kind of reconstruction structure of old building constructional column |
| KR102017728B1 (en) * | 2019-03-29 | 2019-09-03 | 단국대학교 산학협력단 | Seismic retrofit frame structure with fixing adapter |
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