CN103046766B - Method for lengthening columns, adding beams, resisting earthquakes and reinforcing for bottom frame structure - Google Patents
Method for lengthening columns, adding beams, resisting earthquakes and reinforcing for bottom frame structure Download PDFInfo
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- 239000004567 concrete Substances 0.000 claims abstract description 9
- 239000011449 brick Substances 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 24
- 230000002787 reinforcement Effects 0.000 claims description 22
- 238000005728 strengthening Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
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- 239000004570 mortar (masonry) Substances 0.000 description 2
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- 239000002344 surface layer Substances 0.000 description 2
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Abstract
The invention relates to a method for lengthening columns, adding beams, resisting earthquakes and reinforcing for a bottom frame structure. According to the method, sections of original frame columns are expanded in the bottom frame structure, so that expanded frame columns extend in a uniform section mode to an upper brick-concrete structure till the top of the brick-concrete structure to form a penetrating whole body. Simultaneously, longitudinal beams and transverse beams are added on a bearing wall body of the original brick-concrete structure, added beams are in rigid connection with newly lengthened constructional columns, steel bars are embedded on the original floor and newly added beam portions, newly added beams are effectively connected with the original floor, and one-piece pouring is conducted for newly added longitudinal beams, newly added transverse beams and newly lengthened constructional columns, so that the original floor, newly added beams and newly lengthened columns form an integrated body. By the aid of the method, the load-carrying system of the structure can be changed, the original bottom frame structure system is changed into the frame structure system, the earthquake resistant strength of the structure is improved, and the integrity of the structure is enhanced.
Description
Technical field
The present invention relates to a kind of bottom frame structure long column and add seismic strengthening of beams method, belong to technical field of anti-seismic reinforcement.
Background technology
Bottom frame structure refers to that bottom is framework load-bearing and each layer in top is the multistoried building of brick wall load-bearing, bottom frame structure is the mixing load-carrying members of brick house and framework composition, and it is poor that the bottom of general bottom frame structure (one deck or two layers) bears horizontal earthquake force rate.As can be seen from seismic design principle, base frame construction due to bottom be frame construction, top is brick mix structure, whole building does not have formation entirety, horizontal earthquake power can cause bottom frame structure total Collapse, the slump thereupon of top brick mix structure can be caused simultaneously, fact proved, in all previous earthquake, the earthquake of this class formation is all more serious.Because the top lateral deformation stiffness of bottom frame structure is large, bottom lateral deformation stiffness reduces relatively, causes poor seismic behavior.When there being geological process, the sidesway in house occurs in relatively weak bottom by concentrating, and excessive sidesway causes the heavy damage of bottom, and main manifestations is " lightness sensation in the upper and heaviness in the lower ".If bottom is excessively strengthened, then cause weak floor to be transferred to two layers, cause the destruction of brick wall.The earthquake main manifestations of bottom frame structure is:
1) the brick wall earthquake of bottom:
(1) cross wall and interior cross wall is held to occur diagonal crack or intersection diagonal crack, until collapse.
(2) there is horizontal fracture window is upper and lower in vertical wall outward, or wall between windows occurs intersect diagonal crack, or have both at the same time.
(3) there is intersecting diagonal crack in exterior wall corner, corner slump time serious.
2) reinforced concrete post on top, bottom produce horizontal fracture or local crush avalanche, highly seismic region occur bending, causing bottom to collapse, also collapses in top thereupon.
3) in most cases, the earthquake of each layer in top is comparatively light, if bottom is excessively strengthened, weak floor will be caused to be transferred to two layers, cause the destruction of top brick wall.
4) because the feature of bottom bearing wall and frame structure is that house is not only soft but also crisp, distortion is large, and ductility is poor, and the destructiveness of bottom bearing wall and frame structure will be caused more serious than bottom frame structure.
Summary of the invention
The object of the invention is to the weak link to bottom frame structure, propose a kind of bottom frame structure long column and add seismic strengthening of beams method, it adopts the method increasing under(-)chassis column section, make the frame column after " adding fat " carry out uniform section and extend to top brick mix structure, until the top of brick mix structure, form the entirety of a up/down perforation.In former brick mix structure, increase longitudinal and transverse beam in addition, the post that the Liang Hexin newly added " is grown tall " just connects, and simultaneously former floor carries out bar planting and builds with the beam newly added, make former floor, Xin Jialiang and new " grow tall " post form an entirety.
Technical scheme of the present invention is as follows:
A kind of bottom frame structure long column adds seismic strengthening of beams method, it is characterized in that: the method adopting the cross section increasing former frame column in bottom frame structure, make the former frame column after increasing section, namely the frame column after " adding fat " carries out uniform section and extends to top brick mix structure constructional column, until the top of top brick mix structure, make it " grow tall ", form the entirety (that is, the reinforcing of its vertical member is extended to top layer from bottom) of a up/down perforation; Meanwhile, former load-bearing wall with masonry structure body increases longitudinal and transverse beam, the top brick mix structure constructional column of longitudinal and transverse beam and new " the growing tall " newly increased just is connect; Then, carry out bar planting at the position of former floor and new longitudinal and transverse beam, the longitudinal and transverse beam newly increased effectively is connected with former floor; Finally, monobloc cast is carried out to the constructional column after the longitudinal and transverse beam newly increased and " growing tall ", make former floor, the longitudinal and transverse beam newly increased and new " grow tall " and constructional column formed as a whole.
Concrete reinforcement means comprises the steps:
Step one: according to design drawing, first carries out the reinforcing on basis, then carries out the reinforcing of former frame column center pillar and side column, adopts the method increasing column section to reinforce frame column;
Step 2: upwards carry out equal proportion according to the sectional dimension after Frame column reinforcement and extend to top brick mix structure constructional column center pillar and side column, it also adopts the reinforcement means of increasing section, carries out cross section increasing;
Step 3: on the former bearing wall of longitudinal and transverse beam to be increased, unload, namely former bearing wall top building block is rejected, reserve the depth of section increasing longitudinal and transverse beam, and then longitudinal and transverse beam is increased on former bearing wall headspace, the constructional column center pillar of longitudinal and transverse beam and new " the growing tall " newly increased and side column are just connect, forms the structural system that beam column is affixed;
Step 4: carry out bar planting at the position of former floor and newly-increased longitudinal and transverse beam, namely backing plate is set on the former floor of top brick mix structure, and adopt screw rod to pass backing plate and former floor, screw rod is welded with the newly-increased beam stirrup of longitudinal and transverse beam and the connecting rod of connecting screw rod simultaneously, the longitudinal and transverse beam newly increased effectively is connected with former floor, and does overlapping layers on former floor;
Step 5: the frame column after increasing section and constructional column, the longitudinal and transverse beam that newly increases are carried out monobloc cast, forms an entirety.
Wherein, the method for the increase column section in described step one is: outside former frame column, set up stirrup and longitudinal reinforcement, then cross section equal proportion is extended upwardly to superstructure post.
Wherein, the reinforcement means of the increasing section in described step 2 is: outside the former constructional column of top brick mix structure, set up stirrup and longitudinal reinforcement, and the sectional dimension of the constructional column after arrangement of reinforcement is with the sectional dimension after the reinforcing of bottom frame post.
Described bottom frame structure long column adds in seismic strengthening of beams technology, the frame column of increasing section and constructional column, newly add beam and should carry out monobloc cast, form an entirety, avoid the formation of weak floor and be transferred to two layers or three layers, avoid causing short column or the weak post of brutal etc. to be unfavorable for the state that antidetonation is stressed, in casting process, concrete strength should lower than C20.
Described bottom frame structure long column adds in seismic strengthening of beams technology, when the bottom of bottom frame structure is single span framework, frame column formation twin spans should be set up or be combined function and set up Reinforced Concrete Anti-seismic Wall to increase bottom rigidity, reduce the geological process that frame column is born simultaneously.When bottom rigidity is more weak or have obvious torsional effect, Reinforced Concrete Anti-seismic Wall or aileron reinforcing can be set up at bottom.When transition stiffness layer, bearing capacity do not meet shockproof requirements, can steel mesh reinforcement mortar surface layer, steel wire mesh-polymer mortar surface layer be adopted to reinforce original body of wall of transition zone or adopt bottom reinforced concrete wall replacement as the methods such as masonry wall are reinforced.
Beneficial effect:
Bottom frame structure long column of the present invention is adopted to add seismic strengthening of beams method, the rigidity of bottom can be weakened, suitably strengthen the intensity of two layers simultaneously, improve its rigidity, each layer gentle transition to top, if strengthen merely the rigidity of two layers in order to the requirement meeting ratio of rigidity, may cause two layers of reinforcing amount larger, decrease two layers of effective usable floor area, three layers of weak floor becoming new may be caused simultaneously.Bottom frame structure long column adds seismic strengthening of beams technology, can change structure stress system, makes former bottom frame structure system change into frame structure system, has both improve the shock strength of structure, strengthened again the globality of structure.If newly build vertical wall in twice concrete again in original structure, original structure just becomes frame shear wall structure, so namely solves the problem of torsion, solves again the problem of house spaciousness, the larger shock resistance deficiency of beam span.This technology has significant economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is that bottom frame structure long column adds girder construction elevational schematic view;
Fig. 2 is that bottom frame structure long column adds girder construction floor map;
Fig. 3 is that bottom frame structure top brick mix structure constructional column adopts coagulation fortifield village cover to reinforce schematic diagram (A-A sectional drawing);
Fig. 4 is that bottom frame structure top brick mix structure adds beam construction figure (B-B sectional drawing).
In figure, 1: longitudinal and transverse beam; 2: constructional column center pillar; 3: constructional column side column; 4: frame column center pillar; 5: frame column side column; 6: bressummer; 7: collar tie beam; 8: overlapping layers; 9: stirrup; 10: longitudinal reinforcement; 11: former floor; 12: screw rod; 13: nut; 14: backing plate; 15: beam stirrup; 16: connecting rod; 17: basis; 18: former bearing wall.
Detailed description of the invention
As Figure 1-4, bottom frame structure long column of the present invention adds seismic strengthening of beams method, and its detailed description of the invention is as follows:
Adopt the method adopting the cross section increasing former frame column in bottom frame structure, improve the bending resistance of former frame column, shearing resistance and anti-pressure ability.Make the frame column after " adding fat " carry out uniform section and extend to top brick mix structure, until the top of brick mix structure, form the entirety of a up/down perforation, the reinforcing of its vertical member is extended to top layer from bottom, makes it " grow tall ".On the former bearing wall of former brick mix structure 18, increase longitudinal and transverse beam 1 simultaneously, the constructional column of longitudinal and transverse beam 1 and new " the growing tall " newly added just is connect, carry out bar planting at former floor 11 and newly-increased longitudinal and transverse beam 1 position simultaneously, the longitudinal and transverse beam 1 newly added effectively is connected with former floor 11, then monobloc cast is carried out to newly-increased longitudinal and transverse beam 1 and " growing tall " new afterwards constructional column, make former floor 11, newly add longitudinal and transverse beam 1 and new " grow tall " constructional column form an entirety.Specific embodiment of the invention step is as follows:
1, according to design drawing, first the reinforcing on basis 17 is carried out, then the reinforcing of former frame column center pillar 4 and side column 5 is carried out, the method increasing column section is adopted to reinforce frame column, namely outside former frame column, set up stirrup 9 and longitudinal reinforcement 10, then cross section equal proportion is extended upwardly to superstructure post (as shown in Figure 1).
2, top brick mix structure constructional column center pillar 2 and side column 3 is extended to according to the sectional dimension after Frame column reinforcement to equal percentage, also the reinforcement means of increasing section is adopted, carry out cross section increasing, namely outside former constructional column, set up stirrup 9 and longitudinal reinforcement 10, the sectional dimension of the constructional column after arrangement of reinforcement is with the sectional dimension (as shown in Figure 3) after the reinforcing of bottom frame post.
3, on the former bearing wall 18 of longitudinal and transverse beam 1 to be increased, unload, reject former bearing wall 18 top building block, reserve the depth of section adding longitudinal and transverse beam 1.Then on former bearing wall 18 headspace, increase longitudinal and transverse beam 1, the center pillar 4 of longitudinal and transverse beam 1 and new " the growing tall " newly added and the side column 5 of new " growing tall " are just connect, forms the structural system (as shown in Figure 2) that beam column is affixed.
4, bar planting is carried out at the position of former floor 11 and newly-increased longitudinal and transverse beam 1, adopt screw rod 12 through backing plate 14, screw rod 12 is carried out welding with stirrup 15, connecting rod 16 simultaneously, the beam 1 newly added effectively is connected with former floor 11, and does overlapping layers 8 (as shown in Figure 4) on former floor 11.
5, by the frame column of increasing section and constructional column, newly add longitudinal and transverse beam 1 and carry out monobloc cast, form an entirety, concrete strength should lower than C20.
Be more than an exemplary embodiment of the present invention, specific embodiment of the invention is not limited thereto.
Claims (5)
1. a bottom frame structure long column adds seismic strengthening of beams method, it is characterized in that: the method adopting the cross section increasing former frame column in bottom frame structure, make the former frame column after increasing section, namely the frame column after " adding fat " carries out uniform section and extends to top brick mix structure constructional column, until the top of top brick mix structure, make it " grow tall ", form the entirety of a up/down perforation; Meanwhile, former load-bearing wall with masonry structure body (18) the longitudinal and transverse beam of upper increase (1), the top brick mix structure constructional column of longitudinal and transverse beam (1) and new " the growing tall " newly increased just is connect; Then, carry out bar planting at the position of former floor (11) and new longitudinal and transverse beam (1), the longitudinal and transverse beam (1) newly increased effectively is connected with former floor (11); Finally, monobloc cast is carried out to the constructional column after the longitudinal and transverse beam (1) newly increased and " growing tall ", make former floor (11), the constructional column of the longitudinal and transverse beam (1) newly increased and new " growing tall " forms as a whole.
2. bottom frame structure long column according to claim 1 adds seismic strengthening of beams method, it is characterized in that: concrete reinforcement means comprises the steps:
Step one: according to design drawing, first carries out the reinforcing of basis (17), then carries out the reinforcing of former frame column center pillar (4) and side column (5), adopts the method increasing column section to reinforce frame column;
Step 2: upwards carry out uniform section according to the sectional dimension after Frame column reinforcement and extend to top brick mix structure constructional column center pillar (2) and side column (3), it also adopts the reinforcement means of increasing section, carries out cross section increasing;
Step 3: on the former bearing wall (18) of longitudinal and transverse beam (1) to be increased, unload, namely former bearing wall (18) top building block is rejected, reserve the depth of section increasing longitudinal and transverse beam (1), and then longitudinal and transverse beam (1) is increased on former bearing wall (18) headspace, the constructional column center pillar (2) of longitudinal and transverse beam (1) and new " the growing tall " newly increased and side column (3) are just connect, forms the structural system that beam column is affixed;
Step 4: at former floor (11) and newly-increased vertical, bar planting is carried out at the position of crossbeam (1), namely backing plate (14) is set on the former floor of top brick mix structure (11), and adopt screw rod (12) through backing plate (14) and former floor (11), screw rod (12) is indulged with newly-increased simultaneously, the beam stirrup (15) of crossbeam (1) and the connecting rod (16) of connecting screw rod (12) weld, what make to newly increase is vertical, crossbeam (1) is effectively connected with former floor (11), and overlapping layers (8) is done on former floor (11),
Step 5: the frame column after increasing section and constructional column, the longitudinal and transverse beam (1) that newly increases are carried out monobloc cast, forms an entirety.
3. bottom frame structure long column according to claim 2 adds seismic strengthening of beams method, it is characterized in that: the method for the increase column section in described step one is: outside former frame column, set up stirrup (9) and longitudinal reinforcement (10), then cross section uniform section is extended upwardly to superstructure post.
4. bottom frame structure long column according to claim 2 adds seismic strengthening of beams method, it is characterized in that: the reinforcement means of the increasing section in described step 2 is: outside the former constructional column of top brick mix structure, set up stirrup (9) and longitudinal reinforcement (10), the sectional dimension of the constructional column after arrangement of reinforcement is with the sectional dimension after the reinforcing of bottom frame post.
5. bottom frame structure long column according to claim 2 adds seismic strengthening of beams method, it is characterized in that: the concrete strength in described step 5 monobloc cast is not less than C20.
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| CN201310011860.0A CN103046766B (en) | 2013-01-14 | 2013-01-14 | Method for lengthening columns, adding beams, resisting earthquakes and reinforcing for bottom frame structure |
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| CN201310011860.0A CN103046766B (en) | 2013-01-14 | 2013-01-14 | Method for lengthening columns, adding beams, resisting earthquakes and reinforcing for bottom frame structure |
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| CN103306493B (en) * | 2013-05-29 | 2015-08-26 | 叶香竹 | The reinforcement means of fabric structure |
| CN104775631A (en) * | 2015-02-16 | 2015-07-15 | 中交一航局第一工程有限公司 | Late-added concrete stand column construction method |
| CN104763085B (en) * | 2015-04-08 | 2017-06-30 | 中国建筑第八工程局有限公司 | The double T floor frames structures of assembled integral prestressing force and its construction method |
| CN106401208B (en) * | 2016-10-13 | 2017-09-05 | 浙江绿城建筑设计有限公司 | Increase the construction method of the overlapping ruggedized construction of post net on a kind of existing large-span structure newly |
| CN110878641B (en) * | 2019-12-10 | 2023-11-07 | 四川大学锦江学院 | Reinforcing structure adopting superimposed hollow floor slab grid system and new construction method |
| CN115506623B (en) * | 2022-10-14 | 2023-10-31 | 北京房地集团有限公司 | Reinforcing method for expanding section of existing wall lower structural beam |
| CN116411728B (en) * | 2023-05-05 | 2024-05-03 | 广东建科建筑工程技术开发有限公司 | Reinforcing and reforming technology for internal frame structure of brick-concrete building |
| CN117822935A (en) * | 2024-01-16 | 2024-04-05 | 中建二局第三建筑工程有限公司 | Transformation structure and construction process for newly-added frame beam of existing flat slab |
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| JP2008297727A (en) * | 2007-05-29 | 2008-12-11 | Takenaka Komuten Co Ltd | Seismic reinforcing structure of existing building |
| CN101736909A (en) * | 2009-12-07 | 2010-06-16 | 广州大学 | Method for restoring building construction with bottom frame posts damaged by vibration |
| CN202430899U (en) * | 2011-12-20 | 2012-09-12 | 陕西省建筑科学研究院 | Anti-seismic strengthening device for concrete frame column |
| CN102733619B (en) * | 2012-06-06 | 2014-12-10 | 吉林建筑工程学院 | Strengthening method for reinforced concrete frame structure |
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Address after: 100043, Beijing, Shijingshan District, 166 Fu Shi Road, two floor, Chak Yang Building Applicant after: Beijing Aeido International Engineering Technology Co., Ltd. Address before: 100043, Beijing, Shijingshan District, 166 Fu Shi Road, two floor, Chak Yang Building Applicant before: Beijing Zhufu Construction Engineering Co., Ltd. |
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