CN201991099U - Externally applied shock-absorbing steel frame for shock resistance and reinforcement - Google Patents

Externally applied shock-absorbing steel frame for shock resistance and reinforcement Download PDF

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Publication number
CN201991099U
CN201991099U CN2010202565371U CN201020256537U CN201991099U CN 201991099 U CN201991099 U CN 201991099U CN 2010202565371 U CN2010202565371 U CN 2010202565371U CN 201020256537 U CN201020256537 U CN 201020256537U CN 201991099 U CN201991099 U CN 201991099U
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China
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steel frame
steel
type
frame
attachment
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Expired - Fee Related
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CN2010202565371U
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Chinese (zh)
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高向宇
武娜
任洁
黄海涛
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Beijing University of Technology
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Beijing University of Technology
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Abstract

The utility model relates to an externally applied shock-absorbing steel frame for shock resistance and reinforcement, being mainly applied to shock resistance and reinforcement of buildings and belonging to the field of energy dissipation and shock absorption of civil engineering structures. The shock-absorbing steel frame comprises an upper steel frame and a lower steel frame which are arranged along a length direction of the beam, a left steel frame which is fixed to a left post, a right steel frame which is fixed on a right post, and a metallic yielding damper of which both ends are fixedly connected with the upper steel frame, the lower steel frame, the left steel frame and the right steel frame, wherein both ends of the upper steel frame and both ends of the lower steel frame are fixedly connected with the left steel frame and the right steel frame, respectively; the upper steel frame is connected with an upper beam; the lower steel frame is connected with a lower beam. The upper steel frame, the lower steel frame, the left steel frame and the right steel frame make up a rectangular frame which is capable of reinforcing concrete frame structures efficiently and rapidly. The externally applied shock-absorbing steel frame for shock resistance and reinforcement only constructs partially without humidification operation, and most construction members and fittings thereof are prefabricated by factories and can be assembled on the spot, so that standard production can be realized.

Description

Seismic hardening external labeling type shock-absorption steel frame
Technical field
The utility model relates to a kind of seismic hardening external labeling type shock-absorption steel frame, is mainly used in building aseismicity and reinforces, and belongs to civil engineering structure energy-dissipating and shock-absorbing field.
Background technology
At present, the most frequently used reinforcement means is the enlarging section reinforcing method in the The Concrete Structure Design.But the enlarging section reinforcing method has its weak point, and for example, the wet trade time of site operation is long, to producing and living certain influence is arranged, and influences its function of use.
The utility model content
The purpose of this utility model has been to overcome the above-mentioned defective of existing enlarging section reinforcing method, has proposed a kind of seismic hardening external labeling type shock-absorption steel frame.This framework is set up the external labeling type steel frame that has metal yield type damper of some outside concrete frame structure system, the problems that run in the concrete frame structure seismic hardening have been solved, can realize simultaneously efficient, quick reinforced concrete frame construction, do not need wet trade, only constructed in the part, overwhelming majority member and accessory are by prefabrication, and site assembly can realize standardized production.
To achieve these goals, the utility model has been taked following technical scheme.Some several layers of striding all can be arranged this shock-absorption steel frame at building, and this shock-absorption steel frame comprises the last steel frame arranged along the length direction of beam and following steel frame and is fixed on left steel frame on the left post, is fixed on the metal yield type damper of fixedlying connected with right steel frame with last steel frame, time steel frame, left steel frame respectively in right steel frame and two ends on the right post.Wherein, fixedly connected with right steel frame with left steel frame respectively in the two ends of last steel frame and following steel frame, and last steel frame is connected with upper beam, and following steel frame is connected with underbeam.Last steel frame, following steel frame, left steel frame and right steel frame are formed a rectangular frame.And this layer last steel frame is as the following steel frame on upper strata, and the following steel frame of this layer is as the last steel frame of lower floor.
Generally speaking, there are two kinds of forms in Liang Yuzhu, and a kind of form beam is not concordant with the crust of post, and another kind of form beam is concordant with the crust of post.So also there are two kinds of structures in the type of attachment of last steel frame and following steel frame and beam.For the time being not concordant first type of attachment that calls of the crust of Liang Yuzhu, concordant second type of attachment that calls of the crust of Liang Yuzhu.
For first kind of type of attachment, last steel frame with put the beams in place between be connected with cover plate by second shaped steel, the 3rd shaped steel, bottom, concrete annexation is: the cross sectional shape of bottom is identical with the cross sectional shape of upper beam, bottom is arranged in the left and right sides of upper beam near the end, bottom covers the soffit of upper beam, cover plate is arranged in the upper surface of this floor plate and corresponding with the position of bottom, and bolt after passing cover plate, floor and bottom is successively from top to bottom fixed the three.The 3rd shaped steel and second shaped steel are vertically arranged, the 3rd shaped steel is welded in the side of bottom, second shaped steel is welded on the side of steel frame, connect in the 3rd shaped steel and second shaped steel, the two can slide relatively along vertical direction, on second shaped steel, vertically have oblong through hole, on the 3rd shaped steel, have a circular hole in the scope corresponding with oblong lead to the hole site on second shaped steel, bolt after passing oblong through hole on second shaped steel and the circular hole on the 3rd shaped steel is fixed the two, make like this to go up between steel frame and the upper beam in the certain limit of vertical direction, can relatively move that the motion of horizontal direction then is restricted.The type of attachment of following steel frame and underbeam is identical with the type of attachment of last steel frame and upper beam.
For second kind of type of attachment, last steel frame with put the beams in place between be connected with cover plate by bottom.Concrete type of attachment is: the cross sectional shape of bottom is identical with the cross sectional shape of upper beam, bottom is arranged in the left and right sides of upper beam near the end, bottom covers the soffit of upper beam, cover plate is arranged in the upper surface of this floor plate and corresponding with the position of bottom, and bolt after passing cover plate, floor and bottom is successively from top to bottom fixed the three.On last steel frame, vertically have oblong through hole, in the scope corresponding of the side of bottom, have a circular hole with oblong lead to the hole site on the last steel frame, bolt after passing oblong through hole on the steel frame and the circular hole on the bottom is fixed the two, make like this to go up between steel frame and the upper beam in the certain limit of vertical direction, can relatively move that the motion of horizontal direction then is restricted.The type of attachment of following steel frame and underbeam is identical with the type of attachment of last steel frame and upper beam.
Described left steel frame is a hot-rolled steel section, is angle steel, channel-section steel, T-steel or H shaped steel.
Type of attachment between left side steel frame and the left post is: long disciform through hole is set on left steel frame, on left post, bore circular hole in the scope corresponding with oblong lead to the hole site on the left steel frame, during installation, with the oblong through hole on circular hole on the left post and the left steel frame to last, use bolt, thereby make left steel frame moving among a small circle can be arranged, on the direction of span, then cannot move in direction along floor height.
Described right steel frame is a hot-rolled steel section, is one of angle steel, channel-section steel, T-steel or H shaped steel.Right steel frame is identical with the type of attachment between left steel frame and the left post with type of attachment between the right post.
Connected mode between last steel frame and left steel frame and the right steel frame is welding, following steel frame with and left steel frame and right steel frame between connected mode for welding.
Metal yield type damper is fixedlyed connected with right steel frame with last steel frame, following steel frame, left steel frame respectively.
Described metal yield type damper supports for anti-flexing.
All arrange two metal yield type dampers every layer of building, two metal yield type dampers of every layer are (falling) V font and arrange.Four metal yield type dampers of every adjacent two layers are X-shaped or single (falling) V font is arranged.
Every layer at building all is provided with a metal yield type damper of arranging along the rectangular frame diagonal.Two metal yield type dampers of every adjacent two layers are (intersection) single bevel and arrange.
Described upward steel frame, following steel frame, left steel frame and right steel frame are hot-rolled steel section, are angle steel, channel-section steel, T-steel or H shaped steel.
Compare with existing antidetonation, damping reinforcing technique, the utlity model has following advantage:
1, go up steel frame, following steel frame, left steel frame, right steel frame and metal yield type damper and all can make in factory, processing technology is simple, standardization level is high, speed of application is fast, can not carry out strengthening construction under the withdraw from service state at building.
2, power transmission is clear and definite, each layer be outer to be pasted between the shock-absorption steel frame, between shock-absorption steel frame and the agent structure collaborative work reliable, can effectively reduce the load of earthquake to existing agent structure.Can obviously improve equivalent viscous damping ratio, reduce geological process, reduce the antidetonation demand of earthquake existing agent structure member.
3, simple in structure, the stable performance of the utility model has wide range of applications, and applicable to dwelling house, school, hospital, and all kinds of antidetonation shock attenuation civilian and industrial building is reinforced.
Description of drawings
Fig. 1 is the utility model structure and connection diagram
Fig. 2 (a) is the A-A sectional drawing of the utility model beam column first type of attachment
Fig. 2 (b) is the A-A sectional drawing of the utility model beam column second type of attachment
Fig. 3 (a) is the B-B sectional drawing of the utility model beam column first type of attachment
Fig. 3 (b) is the B-B sectional drawing of the utility model beam column second type of attachment
Fig. 4 (a) is the C-C sectional drawing of the utility model beam column first type of attachment
Fig. 4 (b) is the C-C sectional drawing of the utility model beam column second type of attachment
Fig. 5 (a) is the D-D sectional drawing of the utility model beam column first type of attachment
Fig. 5 (b) is the D-D sectional drawing of the utility model beam column second type of attachment
Fig. 6 (a) metal yield type damper (anti-flexing supports) intersection V font is arranged
Fig. 6 (b) metal yield type damper (anti-flexing supports) intersection single bevel is arranged
Fig. 6 (c) metal yield type damper (anti-flexing supports) (falling) V font is arranged
Fig. 6 (d) metal yield type damper (anti-flexing supports) single bevel is arranged
Among the figure: 1, go up steel frame, 2, steel frame down, 3, left steel frame, 4, right steel frame, 5, metal yield type damper (anti-flexing supports), 6, put the beams in place 7, underbeam, 8, left post, 9, right post, 11, second shaped steel, the 12, the 3rd shaped steel, 13, bottom, 14, cover plate.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, shock-absorption steel frame in the present embodiment can one be arranged in some several layers of striding of building, and this shock-absorption steel frame comprises the last steel frame 1 arranged along the length direction of beam and following steel frame 2 and is fixed on left steel frame 3 on the left post 8, is fixed on the metal yield type damper of fixedlying connected with right steel frame 4 with last steel frame 1, time steel frame 2, left steel frame 3 respectively in right steel frame 4 and two ends on the right post 95.Wherein, fixedly connected with right steel frame 4 with left steel frame 3 respectively in the two ends of last steel frame 1 and following steel frame 2, and last steel frame 1 is connected with upper beam, and following steel frame 2 is connected with underbeam.Last steel frame 1, following steel frame 2, left steel frame 3 and right steel frame 4 are formed a rectangular frame.And this layer last steel frame is as the following steel frame on upper strata, and the following steel frame of this layer is as the last steel frame of lower floor.
Generally speaking, there are two kinds of forms in Liang Yuzhu, and a kind of form beam is not concordant with the crust of post, and another kind of form beam is concordant with the crust of post.So also there are two kinds of structures in last steel frame 1 and following steel frame 2 with the type of attachment of beam.For the time being not concordant first type of attachment that calls of the crust of Liang Yuzhu, concordant second type of attachment that calls of the crust of Liang Yuzhu.
For first kind of type of attachment, as Fig. 2 (a), Fig. 3 (a), Fig. 4 (a) and Fig. 5 (a), pass through second shaped steel 11 between last steel frame 1 and the upper beam, the 3rd shaped steel 12, bottom 13 is connected with cover plate 14, concrete annexation is: the cross sectional shape of bottom 13 is identical with the cross sectional shape of upper beam 6, bottom 13 is arranged in the left and right sides of upper beam 6 near the end, bottom 13 covers the soffit of upper beam 6, cover plate 14 is arranged in the upper surface of this floor plate and corresponding with the position of bottom 13, and bolt passes cover plate 14 from top to bottom successively, behind floor and the bottom 13 three is fixed.The 3rd shaped steel 12 and second shaped steel 11 are vertically arranged, the 3rd shaped steel 12 is welded in the side of bottom 13, second shaped steel 11 is welded on the side of steel frame 1, connect in the 3rd shaped steel 12 and second shaped steel 11, the two can slide relatively along vertical direction, on second shaped steel 11, vertically have oblong through hole, on the 3rd shaped steel 12, have a circular hole in the scope corresponding with oblong lead to the hole site on second shaped steel 11, bolt after passing oblong through hole on second shaped steel 11 and the circular hole on the 3rd shaped steel is fixed the two, make like this to go up between steel frame 1 and the upper beam in the certain limit of vertical direction, can relatively move that the motion of horizontal direction then is restricted.The type of attachment of following steel frame and underbeam is identical with the type of attachment of last steel frame and upper beam.
For second kind of type of attachment, shown in Fig. 2 (b), Fig. 3 (b), Fig. 4 (b) and Fig. 5 (b), last steel frame 1 with put the beams in place between be connected with cover plate 14 by bottom 13.Concrete type of attachment is: the cross sectional shape of bottom 13 is identical with the cross sectional shape of upper beam 6, bottom 13 is arranged in the left and right sides of upper beam 6 near the end, bottom 13 covers the soffit of upper beam 6, cover plate 14 is arranged in the upper surface of this floor plate and corresponding with the position of bottom 13, and bolt after passing cover plate 14, floor and bottom 13 is from top to bottom successively fixed the three.On last steel frame 1, vertically have oblong through hole, in the scope corresponding of the side of bottom, have a circular hole with oblong lead to the hole site on the last steel frame 1, bolt after passing oblong through hole on the steel frame 1 and the circular hole on the bottom 13 is fixed the two, make like this to go up between steel frame 1 and the upper beam in the certain limit of vertical direction, can relatively move that the motion of horizontal direction then is restricted.The type of attachment of following steel frame and underbeam is identical with the type of attachment of last steel frame and upper beam.
Left side steel frame 3 can be selected a kind of in angle steel, channel-section steel, T-steel, the H shaped steel.Type of attachment between left side steel frame 3 and the left post 8 as shown in Figure 1, long disciform bolt hole is set on left steel frame, on left post 8, bore circular hole in the scope corresponding with the oblong bolt hole position on the left steel frame, during installation, with the circular hole on the left post 8 and the oblong through hole on the left steel frame 3 to last, use bolt, thereby make left steel frame 3 moving among a small circle can be arranged, on the direction of span, then cannot move in direction along floor height.
As shown in Figure 1, right steel frame 4 also can selection, a kind of in the angle steel, channel-section steel, T-steel, H shaped steel.Right steel frame 4 is identical with the type of attachment between left steel frame and the left post with type of attachment between the right post 9.
Metal yield type damper 5 can select anti-flexing to support.
All arrange two metal yield type dampers 5 every layer of building, two metal yield type dampers of every layer are (falling) V font and arrange.Four metal yield type dampers 5 of every adjacent two layers are X-shaped (shown in Fig. 6 (a)) or single (falling) V font is arranged (shown in Fig. 6 (c)).
Every layer at building all is provided with a metal yield type damper 5 of arranging along the rectangular frame diagonal.Two metal yield type dampers 5 of every adjacent two layers are (intersection) single bevel to be arranged, shown in Fig. 6 (b), Fig. 6 (d).
In the present embodiment, last steel frame 1, down steel frame 2, left steel frame 3, right steel frame 4 all can be removable in the vertical direction certain limit, the motion of level phase then is restricted.
In the present embodiment, last steel frame 1, following steel frame 2, left steel frame 3, right steel frame 4 and metal yield type damper 5 all can be in the factory normalization manufacturings.
In the present embodiment, the last steel frame of this layer is as the following steel frame on upper strata, and the following steel frame of this layer is as the last steel frame of lower floor.

Claims (7)

1. seismic hardening external labeling type shock-absorption steel frame is characterized in that: this shock-absorption steel frame comprises the last steel frame (1) arranged along the length direction of beam and following steel frame (2) and is fixed on left steel frame (3) on the left post (8), is fixed on the metal yield type damper of fixedlying connected with right steel frame (4) with last steel frame (1), time steel frame (2), left steel frame (3) respectively in right steel frame (4) and two ends on the right post (9) (5); Wherein, fixedly connected with right steel frame (4) with left steel frame (3) respectively in the two ends of last steel frame (1) and following steel frame (2), and last steel frame (1) is connected with upper beam, and following steel frame (2) is connected with underbeam; Last steel frame (1), down steel frame (2), left steel frame (3) and right steel frame (4) are formed a rectangular frame, and the last steel frame of this layer is used as the following steel frame on upper strata, and the following steel frame of this layer is used as the last steel frame of lower floor;
There are two kinds of forms in Liang Yuzhu, a kind of form beam is not concordant with the crust of post, another kind of form beam is concordant with the crust of post, the type of attachment of above steel frame (1) and following steel frame (2) and beam also have two kinds of structures, not concordant first type of attachment that calls of the crust of Liang Yuzhu, concordant second type of attachment that calls of the crust of Liang Yuzhu;
For first kind of type of attachment, pass through second shaped steel (11) between last steel frame (1) and the upper beam, the 3rd shaped steel (12), bottom (13) is connected with cover plate (14), concrete annexation is: the cross sectional shape of bottom (13) is identical with the cross sectional shape of upper beam (6), bottom (13) is arranged in the left and right sides of upper beam (6) near the end, bottom (13) covers the soffit of upper beam (6), cover plate (14) is arranged in the upper surface of this floor plate and corresponding with the position of bottom (13), and bolt passes cover plate (14) from top to bottom successively, floor and bottom after (13) are fixed the three; The 3rd shaped steel (12) and second shaped steel (11) are vertically arranged, the 3rd shaped steel (12) is welded in the side of bottom (13), second shaped steel (11) is welded on the side of steel frame (1), connect in the 3rd shaped steel (12) and second shaped steel (11), the two can slide relatively along vertical direction, on second shaped steel (11), vertically have oblong through hole, in the scope that the 3rd shaped steel (12) is gone up and oblong lead to the hole site on second shaped steel (11) is corresponding, have a circular hole, bolt after passing oblong through hole on second shaped steel (11) and the circular hole on the 3rd shaped steel is fixed the two, make like this to go up between steel frame (1) and the upper beam in the certain limit of vertical direction, can relatively move that the motion of horizontal direction then is restricted; The type of attachment of following steel frame and underbeam is identical with the type of attachment of last steel frame and upper beam;
For second kind of type of attachment, last steel frame (1) with put the beams in place between be connected with cover plate (14) by bottom (13); Concrete type of attachment is: the cross sectional shape of bottom (13) is identical with the cross sectional shape of upper beam (6), bottom (13) is arranged in the left and right sides of upper beam (6) near the end, bottom (13) covers the soffit of upper beam (6), cover plate (14) is arranged in the upper surface of this floor plate and corresponding with the position of bottom (13), and bolt after passing cover plate (14), floor and bottom (13) is from top to bottom successively fixed the three; On last steel frame (1), vertically have the oblong through hole, in the scope corresponding of the side of bottom, have a circular hole with oblong lead to the hole site on the last steel frame (1), bolt after passing oblong through hole on the steel frame (1) and the circular hole on the bottom (13) is fixed the two, make like this to go up between steel frame (1) and the upper beam in the certain limit of vertical direction, can relatively move that the motion of horizontal direction then is restricted; The type of attachment of following steel frame and underbeam is identical with the type of attachment of last steel frame and upper beam;
Type of attachment between left side steel frame (3) and the left post (8) is: long ellipse bolt hole is set on left steel frame, in going up the scope corresponding with the oblong bolt hole position on the left steel frame, bores on left post (8) circular hole, during installation, with the oblong bolt hole on circular hole on the left post (8) and the left steel frame (3) to last, use bolt, thereby make left steel frame (3) moving among a small circle can be arranged, on the direction of span, then cannot move in direction along floor height;
Right steel frame (4) is identical with the type of attachment between left steel frame and the left post with type of attachment between the right post (9).
2. a kind of seismic hardening external labeling type shock-absorption steel frame according to claim 1, it is characterized in that: go up steel frame and be welding with connected mode between left steel frame and the right steel frame, following steel frame with and left steel frame and right steel frame between connected mode be to weld.
3. a kind of seismic hardening external labeling type shock-absorption steel frame according to claim 1 is characterized in that: described metal yield type damper supports for anti-flexing.
4. according to claim 1 or claim 2 or the described a kind of seismic hardening external labeling type shock-absorption steel frame of claim 3, it is characterized in that: all arrange two metal yield type dampers (5) every layer of building, two metal yield type dampers of every layer are in the shape of the letter V or inverted v-shaped is arranged.
5. according to claim 1 or claim 2 or the described a kind of seismic hardening external labeling type shock-absorption steel frame of claim 3, it is characterized in that: every layer at building all is provided with a metal yield type damper of arranging along the rectangular frame diagonal.
6. a kind of seismic hardening external labeling type shock-absorption steel frame according to claim 1 is characterized in that: described steel frame, following steel frame, left steel frame and the right steel frame gone up is hot-rolled steel section.
7. a kind of seismic hardening external labeling type shock-absorption steel frame according to claim 6 is characterized in that: described hot-rolled steel section is angle steel or channel-section steel or T-steel or H shaped steel.
CN2010202565371U 2010-07-02 2010-07-02 Externally applied shock-absorbing steel frame for shock resistance and reinforcement Expired - Fee Related CN201991099U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102535672A (en) * 2012-02-15 2012-07-04 姚攀峰 Novel hybrid huge anti-seismic structure and construction method thereof
CN102979175A (en) * 2012-11-26 2013-03-20 北京工业大学 Industrialized multi-story high-rise assembled steel structure frame - prestressed eccentrically-braced system
CN102979163A (en) * 2012-11-26 2013-03-20 北京工业大学 Multi-story high-rise assembled steel structure frame - prestressed eccentrically-braced system
CN102979162A (en) * 2012-11-26 2013-03-20 北京工业大学 Multi-story high-rise assembled steel structure frame - prestressed centrally-braced system
CN103669632A (en) * 2013-11-01 2014-03-26 贵州大学 Method and device for improving seismic capacity of buildings
CN103669639A (en) * 2013-12-31 2014-03-26 长沙理工大学 Energy storage shock-absorbing device
CN105332521A (en) * 2015-11-15 2016-02-17 北京工业大学 Seismic hardening additional damping and reinforcing frame connected with joint region
CN106013837A (en) * 2016-07-19 2016-10-12 关喜才 Method for increasing bearing capacity by compounding existing floor with steel support and structure system
CN110404483A (en) * 2018-04-28 2019-11-05 中国石油天然气集团有限公司 A kind of petrochemical industry pyrolysis furnace and its design method

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102535672B (en) * 2012-02-15 2014-05-28 姚攀峰 Novel hybrid huge anti-seismic structure and construction method thereof
CN102535672A (en) * 2012-02-15 2012-07-04 姚攀峰 Novel hybrid huge anti-seismic structure and construction method thereof
CN102979175A (en) * 2012-11-26 2013-03-20 北京工业大学 Industrialized multi-story high-rise assembled steel structure frame - prestressed eccentrically-braced system
CN102979163A (en) * 2012-11-26 2013-03-20 北京工业大学 Multi-story high-rise assembled steel structure frame - prestressed eccentrically-braced system
CN102979162A (en) * 2012-11-26 2013-03-20 北京工业大学 Multi-story high-rise assembled steel structure frame - prestressed centrally-braced system
CN102979163B (en) * 2012-11-26 2015-06-17 北京工业大学 Multi-story high-rise assembled steel structure frame - prestressed eccentrically-braced system
CN102979175B (en) * 2012-11-26 2015-01-14 北京工业大学 Industrialized multi-story high-rise assembled steel structure frame - prestressed eccentrically-braced system
CN103669632A (en) * 2013-11-01 2014-03-26 贵州大学 Method and device for improving seismic capacity of buildings
CN103669632B (en) * 2013-11-01 2016-08-31 贵州大学 Improve the method and device of shock resistance of the building
CN103669639A (en) * 2013-12-31 2014-03-26 长沙理工大学 Energy storage shock-absorbing device
CN103669639B (en) * 2013-12-31 2016-02-10 长沙理工大学 A kind of energy storage damping device
CN105332521A (en) * 2015-11-15 2016-02-17 北京工业大学 Seismic hardening additional damping and reinforcing frame connected with joint region
CN106013837A (en) * 2016-07-19 2016-10-12 关喜才 Method for increasing bearing capacity by compounding existing floor with steel support and structure system
CN106013837B (en) * 2016-07-19 2019-12-17 关喜才 Method and structure system for increasing bearing capacity by combining existing floor and steel structure support
CN110404483A (en) * 2018-04-28 2019-11-05 中国石油天然气集团有限公司 A kind of petrochemical industry pyrolysis furnace and its design method

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