EP1293624A2 - Seismic shock absorber system and damping device for buildings with framed structure made of reinforced concrete - Google Patents
Seismic shock absorber system and damping device for buildings with framed structure made of reinforced concrete Download PDFInfo
- Publication number
- EP1293624A2 EP1293624A2 EP02398002A EP02398002A EP1293624A2 EP 1293624 A2 EP1293624 A2 EP 1293624A2 EP 02398002 A EP02398002 A EP 02398002A EP 02398002 A EP02398002 A EP 02398002A EP 1293624 A2 EP1293624 A2 EP 1293624A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- seismic
- damping device
- buildings
- reinforced concrete
- framed structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
Definitions
- the present description relates to a system designed to improve the behaviour and to enhance security in face of seismic action, of existing buildings with a framed structure formed of reinforced concrete beams, columns and slabs.
- a great number of the buildings that compose the country's housing complex possess a three-dimensional structure made of reinforced concrete columns and beams, that form a portal like system on each one of the in plan directions.
- the structure behaves elastically, wasting some of the seismic energy through the successive traction and compression of steel rods present inside columns and beams without suffering great damages; for great displacements however the deformations upon the rods turn themselves irreversible, and plastic hinges start forming upon the more stressed sections of beams and columns with appreciable damages to the structure, and increasing danger of collapse.
- the displacements endured by the structure are limited by its inherent damping capacity that allows it to dissipate some of the received energy.
- this capacity is reduced, and that's why in present structures the displacements may easily exceed the values corresponding to resilient behaviour.
- the anti-seismic dampers of the current invention aim at providing an already existing structure with extra damping capacity, therefore allowing a bigger energy dissipation for relatively small displacements.
- the applied principle is that of the energy dissipation through the repeated deformation of blocks equipped with cores comprising high ductility metal rods.
- the rods When the system is repeatedly actioned by an earthquake the rods get heated, and they dissipate the energy received as heat, which is transmitted to the metallic parts and is then dissipated to the concrete and to the surrounding atmosphere.
- the shock damping system is installed inside each structure portal (Figs. 1 and 2) between opposed joints on the same diagonal, i.e. connecting a beam support from a certain floor to the base of the column that supports the other end of same beam.
- the system is mobilized through the successive extensions and shortenings of the diagonals when the earthquake acts upon it.
- the damping devices comprise the following elements:
- One or more pairs of blocks of a bind confined elastomer put end to end, and that are actioned through a steel plate (B) located in between; inside the elastomer block there is a rod made of plumb or other ductile metal (C); a steel cable (D) that connects the damping to the support of the close pillar; a spring (E) that keeps the system under strain; and a lower anchoring element (F, Fig.5), which fixes the steel spring under strain.
- each one of the building floors displaces itself in relation to the floor immediately under it, alternately extending and shortening the diagonals (Fig. 2).
- the fact that the system is let under strain allows for that in each of the damping devices there is energy dissipation, both when a diagonal extends itself and when it shortens.
- Each one of the damping devices is installed near the support of a structure beam, being linked to the lower anchoring element by said cable. After the anchoring of the two parts, the cable is stressed up to a predetermined value, taking the wedges its lined up position.
- the system is periodically inspected in order to ensure its good functioning condition. After an earthquake the system is inspected, the connections to the concrete are verified, as well as the condition of the different parts, especially of the elastomer blocks that can have been damaged, in which case they shall be replaced.
- a metallic lid can mask each one of the damping devices, and the connecting cables can be hide by means of a coating plate set upon the wedges, or upon an eventual thin filling (Fig. 6).
- the claimed system is innovative:
- the main advantage of the invention system is the one that results from its object, i.e., the reduction of the displacements imposed to the structure by the earthquake, maintaining it under an elastic regime, and reducing damages and the risk of collapse.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
Description
- The present description relates to a system designed to improve the behaviour and to enhance security in face of seismic action, of existing buildings with a framed structure formed of reinforced concrete beams, columns and slabs.
- A great number of the buildings that compose the country's housing complex possess a three-dimensional structure made of reinforced concrete columns and beams, that form a portal like system on each one of the in plan directions.
- In case of occurrence of an earthquake a building having one such structure will resist chiefly through the flexion forces installed in the columns, and in the beams as a result of horizontal displacements imposed by the seismic acceleration that is transmitted to them from the ground.
- For small displacements, the structure behaves elastically, wasting some of the seismic energy through the successive traction and compression of steel rods present inside columns and beams without suffering great damages; for great displacements however the deformations upon the rods turn themselves irreversible, and plastic hinges start forming upon the more stressed sections of beams and columns with appreciable damages to the structure, and increasing danger of collapse.
- The preferred embodiment of this invention is afterwards described in detail, based on the drawings from the annexed figures, which show schematically:
- Fig.1 - Assembly scheme of the anti-seismic damping devices for the seismic shock damping system of the invention, at two perpendicular vertical plans.
- Fig.2 - An assembly scheme for the anti-seismic damping devices.
- Fig.3 - The Assembly of a damper from said shock damping system.
- Fig.4 - The main body of an anti-seismic damping device, and its fittings.
- Fig.5 - A lower anchoring element for an anti-seismic damping device.
- Fig.6 - The masking of an anti-seismic damping device.
-
- In an elastic phase, the displacements endured by the structure are limited by its inherent damping capacity that allows it to dissipate some of the received energy. However, this capacity is reduced, and that's why in present structures the displacements may easily exceed the values corresponding to resilient behaviour.
- The anti-seismic dampers of the current invention aim at providing an already existing structure with extra damping capacity, therefore allowing a bigger energy dissipation for relatively small displacements.
- The applied principle is that of the energy dissipation through the repeated deformation of blocks equipped with cores comprising high ductility metal rods. When the system is repeatedly actioned by an earthquake the rods get heated, and they dissipate the energy received as heat, which is transmitted to the metallic parts and is then dissipated to the concrete and to the surrounding atmosphere.
- The shock damping system is installed inside each structure portal (Figs. 1 and 2) between opposed joints on the same diagonal, i.e. connecting a beam support from a certain floor to the base of the column that supports the other end of same beam. The system is mobilized through the successive extensions and shortenings of the diagonals when the earthquake acts upon it.
- One or more pairs of blocks of a bind confined elastomer (A) put end to end, and that are actioned through a steel plate (B) located in between; inside the elastomer block there is a rod made of plumb or other ductile metal (C);
a steel cable (D) that connects the damping to the support of the close pillar;
a spring (E) that keeps the system under strain; and
a lower anchoring element (F, Fig.5), which fixes the steel spring under strain. - When the earthquake takes place, and during the time of its action, each one of the building floors displaces itself in relation to the floor immediately under it, alternately extending and shortening the diagonals (Fig. 2). The fact that the system is let under strain allows for that in each of the damping devices there is energy dissipation, both when a diagonal extends itself and when it shortens.
- Each one of the damping devices is installed near the support of a structure beam, being linked to the lower anchoring element by said cable. After the anchoring of the two parts, the cable is stressed up to a predetermined value, taking the wedges its lined up position.
- The system is periodically inspected in order to ensure its good functioning condition. After an earthquake the system is inspected, the connections to the concrete are verified, as well as the condition of the different parts, especially of the elastomer blocks that can have been damaged, in which case they shall be replaced.
- For aesthetical reasons a metallic lid can mask each one of the damping devices, and the connecting cables can be hide by means of a coating plate set upon the wedges, or upon an eventual thin filling (Fig. 6).
- The claimed system is innovative:
- Because of the use of a system of restitution that allows for the damping in both displacement directions during the earthquake;
- Because of the permanent strain of the cables;
- Because of the use inside a building structure of confined elastomer blocks that have a ductile core.
-
- The main advantage of the invention system is the one that results from its object, i.e., the reduction of the displacements imposed to the structure by the earthquake, maintaining it under an elastic regime, and reducing damages and the risk of collapse.
- Furthermore the system still presents the following advantages:
- The use of known technology and materials
- Easy assembling and possibility of dismantling (reversibility)
- Reduced intrusiveness and thus reduced disturbance to the building users during and after de assembly
- Easy inspection and replacement of damaged elements after the action of an earthquake
- Low cost
Claims (2)
- Seismic vibrations damping device, characterized by the fact that it comprises the following elements:One or more pairs of confined elastomer blocks (A) installed end to end, and that are actioned by a metallic plate (B), preferably made of steel, located in between and in whose interior there is a single rod made of a ductile metal, preferably plumb (C);A steel spring (D) that makes the connection from de damping device to the base of next column;A spring (E) that keeps the system under strain; andA lower anchor element (F), where said steel spring (D) is connected.
- Seismic shock damping system for buildings with a reinforced concrete framed structure, characterized by the fact that inside each portal gap of the structure, between opposed joints of the same diagonal, at least one anti-seismic damping device as per claim 1 is inserted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT102663A PT102663B (en) | 2001-09-13 | 2001-09-13 | SISMIC DAMPING SYSTEM AND BUMPER, FOR BUILDINGS WITH PORTIFIED STRUCTURE OF ARMED BETA |
PT10266301 | 2001-09-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1293624A2 true EP1293624A2 (en) | 2003-03-19 |
EP1293624A3 EP1293624A3 (en) | 2003-12-03 |
Family
ID=20086077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02398002A Withdrawn EP1293624A3 (en) | 2001-09-13 | 2002-03-04 | Seismic shock absorber system and damping device for buildings with framed structure made of reinforced concrete |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1293624A3 (en) |
PT (1) | PT102663B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015028243A (en) * | 2013-07-30 | 2015-02-12 | 株式会社サトウ | Seismic strengthening device, seismic strengthening structure, earthquake-proof building, and seismic strengthening method |
CN105971145A (en) * | 2016-07-01 | 2016-09-28 | 上海赛弗工程减震技术有限公司 | Mounting structure of anti-seismic coupling-beam damper of building |
CN107542842A (en) * | 2017-10-12 | 2018-01-05 | 盛年科技有限公司 | A kind of electromechanical equipment anti-seismic damper |
CN108518114A (en) * | 2018-04-17 | 2018-09-11 | 江西科技师范大学 | The efficient energy-consumption damper of metal |
CN114775788A (en) * | 2022-03-18 | 2022-07-22 | 中南大学 | Assembled is from restoring to throne antidetonation steel truss girder system |
CN114991525A (en) * | 2022-07-08 | 2022-09-02 | 安徽工业大学 | Floor corner separation device and reinforcement method for guaranteeing functions of strong columns and weak beams |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112282471B (en) * | 2020-10-23 | 2022-02-11 | 安徽四建控股集团有限公司 | Beam-column connecting node based on steel strand net piece and embedded part |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5303524A (en) * | 1992-03-09 | 1994-04-19 | Caspe Marc S | Earthquaker protection system and method of installing same |
WO1998026142A1 (en) * | 1996-12-09 | 1998-06-18 | Yutaka Fukuda | Vibration-control damper |
-
2001
- 2001-09-13 PT PT102663A patent/PT102663B/en not_active IP Right Cessation
-
2002
- 2002-03-04 EP EP02398002A patent/EP1293624A3/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5303524A (en) * | 1992-03-09 | 1994-04-19 | Caspe Marc S | Earthquaker protection system and method of installing same |
WO1998026142A1 (en) * | 1996-12-09 | 1998-06-18 | Yutaka Fukuda | Vibration-control damper |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015028243A (en) * | 2013-07-30 | 2015-02-12 | 株式会社サトウ | Seismic strengthening device, seismic strengthening structure, earthquake-proof building, and seismic strengthening method |
CN105971145A (en) * | 2016-07-01 | 2016-09-28 | 上海赛弗工程减震技术有限公司 | Mounting structure of anti-seismic coupling-beam damper of building |
CN107542842A (en) * | 2017-10-12 | 2018-01-05 | 盛年科技有限公司 | A kind of electromechanical equipment anti-seismic damper |
CN107542842B (en) * | 2017-10-12 | 2024-04-02 | 盛年科技有限公司 | Anti-vibration damper for electromechanical equipment |
CN108518114A (en) * | 2018-04-17 | 2018-09-11 | 江西科技师范大学 | The efficient energy-consumption damper of metal |
CN108518114B (en) * | 2018-04-17 | 2019-11-26 | 江西科技师范大学 | The efficient energy-consumption damper of metal |
CN114775788A (en) * | 2022-03-18 | 2022-07-22 | 中南大学 | Assembled is from restoring to throne antidetonation steel truss girder system |
CN114775788B (en) * | 2022-03-18 | 2024-04-09 | 中南大学 | Assembled self-resetting anti-seismic steel truss girder system |
CN114991525A (en) * | 2022-07-08 | 2022-09-02 | 安徽工业大学 | Floor corner separation device and reinforcement method for guaranteeing functions of strong columns and weak beams |
CN114991525B (en) * | 2022-07-08 | 2024-02-06 | 安徽工业大学 | Floor corner disengaging device for guaranteeing functions of strong column and weak beam and reinforcing method |
Also Published As
Publication number | Publication date |
---|---|
EP1293624A3 (en) | 2003-12-03 |
PT102663A (en) | 2003-03-31 |
PT102663B (en) | 2004-07-30 |
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