WO2014104995A2 - A high performance solid polyurethane elastomer seismic isolator with or without an elastomer core or lead core - Google Patents
A high performance solid polyurethane elastomer seismic isolator with or without an elastomer core or lead core Download PDFInfo
- Publication number
- WO2014104995A2 WO2014104995A2 PCT/TR2013/000366 TR2013000366W WO2014104995A2 WO 2014104995 A2 WO2014104995 A2 WO 2014104995A2 TR 2013000366 W TR2013000366 W TR 2013000366W WO 2014104995 A2 WO2014104995 A2 WO 2014104995A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polyurethane elastomer
- solid polyurethane
- isolator
- seismic
- seismic isolator
- Prior art date
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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
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
Definitions
- the present invention particularly relates to a high performance seismic isolator produced from solid polyurethane elastomer material so as to be provided with or without an elastomer core or lead core, reinforced with steel metal based plates and developed for ensuring security of life and property by absorbing destructive and damaging forces occurring during earthquakes for protecting the structures such as reinforced concrete or steel buildings and bridges, viaducts, nuclear power plant, etc. from the earthquakes.
- Natural rubber and synthetic rubber material is used in the existing isolators used in the prior art, wherein resistance of the rubber based seismic isolators against severe and destructive earthquakes are not sufficient due to the poor physical and chemical properties of the rubber. Therefore, very significant life and property losses take place during the large and destructive earthquakes.
- Shore A hardness of the rubber is between 50 and 75. When Shore A hardness value of natural rubber is above 75, it becomes brittle and strength thereof rapidly decreases.
- Natural rubber based seismic isolators lose strength properties under repeated seismic loads due to the permanent deformation and crystallization thereof.
- the present invention relates to a solid polyurethane elastomer seismic isolator, which meets the aforementioned requirements, eliminates all the drawbacks and brings additional advantages.
- the object of the present invention is to use a solid polyurethane elastomer material in the seismic isolators.
- a solid polyurethane elastomer material in the seismic isolators.
- Another object of the present invention is to increase operating temperature ranges of the seismic isolators produced from solid polyurethane elastomer material and capable of stably operating between the temperatures of -40°C and +80°C and operating above temperature of +120°C for a very short time and thus to make them resistant against all weather conditions without the effect of aging.
- Another object of the present invention is to make the seismic isolators produced from solid polyurethane elastomer material with a Shore A hardness between 70 Shore A and 100 Shore A resistant against the greater loads.
- Another object of the present invention is to provide high strength and long life seismic isolators produced from solid polyurethane elastomer material having superior physical and chemical material properties against the repeated seismic loads without exhibiting the effect of aging.
- Another object of the present invention is to enable obtaining the desired performance from the isolators reinforced with steel plates using solid polyurethane elastomer material with a high adhesion capability to metal materials such as steel and aluminum.
- Another object of the present invention is to just provide the desired strength in the large magnitude earthquakes (for example with a magnitude between 7.5 and 8.5) by means of the seismic isolators produced from solid polyurethane elastomer material.
- the present invention relates to a seismic isolator characterized in that it exhibits resistance against the vertical dynamic and static column loads (P) and against the horizontal seismic shear forces (Q) experienced by the structures during an earthquake, absorbs these forces, is reinforced with steel metal based plates and is laminated by means of free casting of solid polyurethane elastomer material inside the steel molds.
- FIGURE 1 A cross sectional view of the solid polyurethane elastomer isolator according to the present invention being mounted below the building column.
- FIGURE 2 A cross sectional view of the demounted solid polyurethane elastomer isolator with an elastomer or lead core.
- FIGURE 3 A cross sectional view of the solid polyurethane elastomer isolator without a core.
- FIGURE 4 A cross sectional view of the solid polyurethane elastomer isolator with an elastomer core.
- FIGURE 5 A cross sectional view of the solid polyurethane elastomer isolator with a lead core.
- FIGURE 6 A cross sectional view of a hollow solid polyurethane elastomer isolator.
- Solid polyurethane elastomer loading plates (3) are laminated from below and above to the solid polyurethane elastomer material (2) body having a circular, square, rectangular and other geometrical shape and laminated with reinforcement plate (1) at certain spacing so as to be parallel to each other.
- the solid polyurethane elastomer material (2) body comprises a core (6), which is hollow or made of solid polyurethane elastomer material (2) or metal (lead) material.
- the solid polyurethane elastomer material (2) body is surrounded by a solid polyurethane elastomer side surface enclosing element (10) enclosing and protecting the side surfaces.
- the seismic isolator (A) is formed by connecting the mounting plates (4) to the loading plates (3) disposed in the lower and upper regions by means of the connection elements (5). These mounting plates (4) disposed in the seismic isolator (A) are fixed by means of anchor elements (7) and connection elements (5) between the whole soil and ground bearing said soil or between the building column (8) and column head (9) above the foundation of the structure desired to be protected from the earthquakes.
- the seismic isolator (A) made of solid polyurethane elastomer material is positioned on the structure desired to be protected from the earthquakes.
- the seismic isolator (A) positioned in the desired region or regions serves to resist against the vertical dynamic and static column loads (P) and against the horizontal seismic shear forces (Q) generated during an earthquake and to absorb these forces.
- the seismic isolator (A) enables the protection of the structure provided therewith from the earthquake.
Abstract
The present invention relates to a seismic isolator (A) that it exhibits resistance against the dynamic and static vertical column loads (P) and against the horizontal seismic shear forces (Q) experienced by the structures during an earthquake, absorbs these forces, does not transmit said forces to the building, is reinforced with steel metal based plates (1) and is laminated by the solid polyurethane elastomer material.
Description
DESCRIPTION
A HIGH PERFORMANCE SOLID POLYURETHANE ELASTOMER SEISMIC ISOLATOR WITH OR WITHOUT AN ELASTOMER CORE OR LEAD CORE
FIELD OF THE INVENTION
The present invention particularly relates to a high performance seismic isolator produced from solid polyurethane elastomer material so as to be provided with or without an elastomer core or lead core, reinforced with steel metal based plates and developed for ensuring security of life and property by absorbing destructive and damaging forces occurring during earthquakes for protecting the structures such as reinforced concrete or steel buildings and bridges, viaducts, nuclear power plant, etc. from the earthquakes.
PRIOR ART
Natural rubber and synthetic rubber material is used in the existing isolators used in the prior art, wherein resistance of the rubber based seismic isolators against severe and destructive earthquakes are not sufficient due to the poor physical and chemical properties of the rubber. Therefore, very significant life and property losses take place during the large and destructive earthquakes.
Modulus of elasticity (Young's modulus) of natural rubber is between E=0.76 MPa and 7.6 MPa, the shear modulus thereof is between G=0.35 MPa and 1.35 MPa and the density thereof is 910 kg/m3. These values are insufficient for large earthquakes. Natural rubber seismic isolators age and lose their strength by crystallization at temperatures of -20°C and lower values.
Shore A hardness of the rubber is between 50 and 75. When Shore A hardness value of natural rubber is above 75, it becomes brittle and strength thereof rapidly decreases.
Natural rubber based seismic isolators lose strength properties under repeated seismic loads due to the permanent deformation and crystallization thereof.
Adhesion capability of natural rubber materials to metal materials such as steel and aluminum is low. This characteristic leads to inability to obtain the desired performance from the isolators reinforced with steel plates.
Existing natural rubber seismic isolators are not safe against the repeated seismic forces and against the high magnitude earthquakes (magnitudes of 7.5 and above). In the literature, one of the patents related with the subject matter is the Japanese application JP2011141036 entitled as "Seismic Isolator". In the abstract of said application, installation of two metal plates filled with rubber materials between the structures and surface bearing the structures is mentioned. In another Japanese application, JP2011256564, an isolator of thermoplastic resin filled between two structures is disclosed.
In conclusion, an improvement in the relevant art. is necessary due to the aforementioned drawbacks and the insufficiency of the existing solutions in the field.
OBJECTS OF THE INVENTION
The present invention relates to a solid polyurethane elastomer seismic isolator, which meets the aforementioned requirements, eliminates all the drawbacks and brings additional advantages.
The object of the present invention is to use a solid polyurethane elastomer material in the seismic isolators. Thus, it is to make the seismic isolators more resistant against the severe and destructive earthquakes thanks to the high strength characteristics of the seismic isolators produced from solid polyurethane elastomer material.
Another object of the present invention is to enable the seismic isolators produced from rigid polyurethane elastomer material to exhibit sufficient strength against the large earthquakes with a modulus of elasticity (Young's modulus) between E=50 MPa and 120 MPa, a shear modulus between G=1.5 MPa and 35 MPa and a density of 1100 to 1270 kg/m3.
Another object of the present invention is to increase operating temperature ranges of the seismic isolators produced from solid polyurethane elastomer material and capable of stably operating between the temperatures of -40°C and +80°C and operating above temperature of +120°C for a very short time and thus to make them resistant against all weather conditions without the effect of aging.
Another object of the present invention is to make the seismic isolators produced from solid polyurethane elastomer material with a Shore A hardness between 70 Shore A and 100 Shore A resistant against the greater loads. Another object of the present invention is to provide high strength and long life seismic isolators produced from solid polyurethane elastomer material having superior physical and chemical material properties against the repeated seismic loads without exhibiting the effect of aging. Another object of the present invention is to enable obtaining the desired performance from the isolators reinforced with steel plates using solid polyurethane elastomer material with a high adhesion capability to metal materials such as steel and aluminum.
Another object of the present invention is to just provide the desired strength in the large magnitude earthquakes (for example with a magnitude between 7.5 and 8.5) by means of the seismic isolators produced from solid polyurethane elastomer material.
In order to achieve the aforementioned objects, the present invention relates to a seismic isolator characterized in that it exhibits resistance against the vertical dynamic and static column loads (P) and against the horizontal seismic shear forces (Q) experienced by the structures during an earthquake, absorbs these forces, is reinforced with steel metal based plates and is laminated by means of free casting of solid polyurethane elastomer material inside the steel molds. The structural and the characteristic features and all advantages of the present invention will be understood more clearly with the following figures and the detailed description written by referring to said figures, therefore, the evaluation needs to be done by taking said figures and the detailed description into consideration. DESCRIPTION OF THE FIGURES
Scaling of drawings is not absolutely required and details, which are not needed for understanding the present invention may have been neglected. Furthermore, elements, which are at least substantially identical or have at least substantially identical functions, are indicated with the same number.
FIGURE 1: A cross sectional view of the solid polyurethane elastomer isolator according to the present invention being mounted below the building column.
FIGURE 2: A cross sectional view of the demounted solid polyurethane elastomer isolator with an elastomer or lead core.
FIGURE 3: A cross sectional view of the solid polyurethane elastomer isolator without a core.
FIGURE 4: A cross sectional view of the solid polyurethane elastomer isolator with an elastomer core.
FIGURE 5: A cross sectional view of the solid polyurethane elastomer isolator with a lead core. FIGURE 6: A cross sectional view of a hollow solid polyurethane elastomer isolator.
REFERENCE NUMBERS
A. Seismic isolator
1 - Reinforcement plate
2 - Solid polyurethane elastomer material
3 - Loading plate
4 - Mounting plate
5 - Connection element
6 - Core (elastomer or lead)
7 - Anchor element
8 - Building column
9 - Column head above the foundation
10 - Side surface enclosing element
P : Vertical column load
Q : Horizontal seismic shear force
DETAILED DESCRIPTION
In this detailed description, preferred embodiments of the solid polyurethane elastomer seismic isolator (A) according to the present invention are described only for a better understanding of the subject without constituting any restrictive effect.
Solid polyurethane elastomer loading plates (3) are laminated from below and above to the solid polyurethane elastomer material (2) body having a circular, square, rectangular and other geometrical shape and laminated with reinforcement plate (1) at certain spacing so as to be parallel to each other. The solid polyurethane elastomer material (2) body comprises a core (6), which is hollow or made of solid polyurethane elastomer material (2) or metal (lead) material. The solid polyurethane elastomer material (2) body is surrounded by a solid polyurethane elastomer side surface enclosing element (10) enclosing and protecting the side surfaces. The seismic isolator (A) is formed by connecting the mounting plates (4) to the loading plates (3) disposed in the lower and upper regions by means of the connection elements (5). These mounting plates (4) disposed in the seismic isolator (A) are fixed by means of anchor elements (7) and connection elements (5) between the whole soil and ground bearing said soil or between the building column (8) and column head (9) above the foundation of the structure desired to be protected from the earthquakes. Thus, the seismic isolator (A) made of solid polyurethane elastomer material is positioned on the structure desired to be protected from the earthquakes.
The seismic isolator (A) positioned in the desired region or regions serves to resist against the vertical dynamic and static column loads (P) and against the horizontal seismic shear forces (Q) generated during an earthquake and to absorb these forces. Here, the seismic isolator (A) enables the protection of the structure provided therewith from the earthquake.
Claims
1. A seismic isolator (A) characterized in that it exhibits resistance against the dynamic and static vertical column loads (P) and against the horizontal seismic shear forces (Q) experienced by the structures during an earthquake, absorbs these forces, is reinforced with steel metal based plates (1) and is laminated by the solid polyurethane elastomer material.
2. A solid polyurethane elastomer seismic isolator (A) according to Claim 1 , characterized in that it comprises a core (6) disposed in the center of said seismic isolator (A) and connected along said isolator.
3. A solid polyurethane elastomer seismic isolator (A) according to Claim 1 , characterized in that interior of said core (6) is emptied.
4. A solid polyurethane elastomer seismic isolator (A) according to Claim 1 , characterized in that the core (6) is made of steel metal based material or solid polyurethane elastomer material (2).
5. A solid polyurethane elastomer seismic isolator (A) according to Claim 1 , characterized in that it comprises loading plates (3) laminated below and above the isolator (A).
6. A solid polyurethane elastomer seismic isolator (A) according to Claim 1 , characterized in that it comprises an elastomer side surface enclosing element (10) laminated on the side walls of the isolator (A).
7. A solid polyurethane elastomer seismic isolator (A) according to Claim 5, characterized in that mounting plates (4) are mounted on the loading plates (3) disposed below and above the isolator by means of the connection elements (5).
8. A solid polyurethane elastomer seismic isolator (A) according to Claims 5 and 7, characterized in that the seismic isolator is fixed by means of anchor elements (7) and connection elements (5) between the whole soil and ground bearing said soil or between the building column (8) and column head above the foundation (9) or between the middle of the column or column head of the structure desired to be protected from the earthquakes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR201215337 | 2012-12-26 | ||
| TR2012/15337 | 2012-12-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2014104995A2 true WO2014104995A2 (en) | 2014-07-03 |
| WO2014104995A3 WO2014104995A3 (en) | 2014-08-14 |
Family
ID=50116147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2013/000366 WO2014104995A2 (en) | 2012-12-26 | 2013-12-10 | A high performance solid polyurethane elastomer seismic isolator with or without an elastomer core or lead core |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2014104995A2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016084696A (en) * | 2015-06-11 | 2016-05-19 | オイレス工業株式会社 | Method for removing seismic isolator from between lower structure and upper structure, and method for installing new seismic isolator between them |
| WO2017082839A1 (en) | 2015-11-13 | 2017-05-18 | Ugur Gunduz | Earthquake isolator and production method of such an isolator |
| EP3769979A1 (en) | 2019-07-26 | 2021-01-27 | Lohr Industrie | Joint assembly for linkage including a damping system |
| IT202000001177A1 (en) * | 2020-01-29 | 2021-07-29 | Santis Giovanni De | CONNECTION NODE FOR TIE RODS IN DYNAMIC RESPONSE THREADED BARS WITH NON-CONFINED ELASTOMERIC CUSHION |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011141036A (en) | 2011-02-18 | 2011-07-21 | Fujita Corp | Seismic isolator |
| JP2011256564A (en) | 2010-06-08 | 2011-12-22 | Hayashi Bussan Co Ltd | Seismic isolator placed on foundation of building |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4899323A (en) * | 1986-08-04 | 1990-02-06 | Bridgestone Corporation | Anti-seismic device |
| US5014474A (en) * | 1989-04-24 | 1991-05-14 | Fyfe Edward R | System and apparatus for limiting the effect of vibrations between a structure and its foundation |
| US5765322A (en) * | 1995-09-29 | 1998-06-16 | Bridgestone Corporation | Seismic isolation apparatus |
| US7856766B2 (en) * | 2006-07-06 | 2010-12-28 | Oiles Corporation | Seismic isolation device |
| JP5140546B2 (en) * | 2007-10-30 | 2013-02-06 | 株式会社ブリヂストン | Seismic isolation structure |
-
2013
- 2013-12-10 WO PCT/TR2013/000366 patent/WO2014104995A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011256564A (en) | 2010-06-08 | 2011-12-22 | Hayashi Bussan Co Ltd | Seismic isolator placed on foundation of building |
| JP2011141036A (en) | 2011-02-18 | 2011-07-21 | Fujita Corp | Seismic isolator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016084696A (en) * | 2015-06-11 | 2016-05-19 | オイレス工業株式会社 | Method for removing seismic isolator from between lower structure and upper structure, and method for installing new seismic isolator between them |
| WO2017082839A1 (en) | 2015-11-13 | 2017-05-18 | Ugur Gunduz | Earthquake isolator and production method of such an isolator |
| EP3769979A1 (en) | 2019-07-26 | 2021-01-27 | Lohr Industrie | Joint assembly for linkage including a damping system |
| FR3099088A1 (en) | 2019-07-26 | 2021-01-29 | Lohr Industrie | HITCH JOINT ASSEMBLY INTEGRATING A CUSHIONING SYSTEM |
| IT202000001177A1 (en) * | 2020-01-29 | 2021-07-29 | Santis Giovanni De | CONNECTION NODE FOR TIE RODS IN DYNAMIC RESPONSE THREADED BARS WITH NON-CONFINED ELASTOMERIC CUSHION |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014104995A3 (en) | 2014-08-14 |
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