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WO2007125071A1 - Dispositif d'isolation reactive de contraintes dynamiques horizontales alternees - Google Patents

Dispositif d'isolation reactive de contraintes dynamiques horizontales alternees Download PDF

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Publication number
WO2007125071A1
WO2007125071A1 PCT/EP2007/054084 EP2007054084W WO2007125071A1 WO 2007125071 A1 WO2007125071 A1 WO 2007125071A1 EP 2007054084 W EP2007054084 W EP 2007054084W WO 2007125071 A1 WO2007125071 A1 WO 2007125071A1
Authority
WO
WIPO (PCT)
Prior art keywords
tie rod
elements
rod elements
protected
stresses
Prior art date
Application number
PCT/EP2007/054084
Other languages
English (en)
Inventor
Giovanni Chizzola
Nello Morresi
Original Assignee
Giovanni Chizzola
Nello Morresi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Giovanni Chizzola, Nello Morresi filed Critical Giovanni Chizzola
Publication of WO2007125071A1 publication Critical patent/WO2007125071A1/fr

Links

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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/34—Foundations for sinking or earthquake territories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems

Definitions

  • the device according to the present invention adopts the principle of mechanical reactivity and is conceived to attenuate the vibratory energy that is propagated in a horizontal direction.
  • the most common sources of horizontal vibrations comprise, apart from earthquakes, weaving looms, mechanical presses, rolling mills and centrifuges.
  • the chapter in Physics that deals with the use of the device according to the present invention is: Dynamics of mechanical vibrations, which also deals with phenomena connected with the propagation of vibratory energy, that is, elastic waves.
  • This chapter develops two topics, which are: a) how to promote the vibratory state, when it is desired to use its action in the technological field; b) how to defend oneself from the action of the vibratory state when damage derives for the health of people, or the integrity of their goods. From this second point of view, the attenuation of vibratory energy always requires, functioning as a protective barrier, the use of those mechanical devices called vibration-dampers.
  • a building made with traditional techniques cannot be considered protected when it is entrusted to traditional techniques alone, so that all the structures that make up such a building are subject to the risk of collapse.
  • the operating efficiency of the present invention is suitable both for the condition that sees the structure threatened by the vibrations transmitted by an earthquake or similar phenomenon, and also the condition that puts the surrounding environment exempt from the vibrations produced inside a structure where the sources of the vibrations are installed.
  • the suitable configuration in any case provides that the plane of the ground and the plane of the structure base are parallel. The distance between these planes corresponds to the vertical bulk of the vibration- damper device or devices according to the present invention installed, which perform their task by keeping the distance between the parallel planes substantially unvaried.
  • each individual device comprises a first element (upper face) to be attached to the structure, a second element (lower face) associated with the supporting base and also tie rod elements which connect the two elements to each other.
  • tie rods here and hereafter shall be understood as elements intended for connection functions and stressed under traction.
  • Each device according to the present invention is structured to support a certain maximum load and the structuring of the various components described above will be characterized by its own frequency connected to the length of the tie rods used.
  • the characteristic frequency remains constant, irrespective of the load, provided it is maintained within the maximum load capacity of each individual device. This frequency must be chosen lower than that of the forcing vibrations and, to put it better, much lower, in observance of the principle of mechanical reactivity. Also in those cases where the forcing frequency is in the range of 10 c/sec (as for the strongest undulatory waves of earthquakes, which we are dealing with here), the device according to the present invention is able to ensure attenuations of more than 90%. To give an example, an earthquake classified as the maximum degree of the Richter scale would produce effects lower than those of the first degree.
  • - fig. 1 is a plane view of a device according to the present invention for reactive insulation from alternate horizontal dynamic stresses
  • - fig. 2 is a section of the device from Il to Il of fig. 1.
  • each device or support 10 according to the present invention will be made with the characteristics relating to its maximum load capacity and its own characteristic frequency.
  • tie rods 12 which connect the two elements
  • tie rods 12 can be as many as desired.
  • a single tie rod 12 can be provided, disposed at the center of the device 10.
  • the individual tie rod or tie rods 12 in quiet conditions, will have a vertical position.
  • the quantity of tie rods 12 adopted must be related to the constructional characteristics of the device 10, and also the positioning thereof, which will be along a circumference whose diameter will be equal for the two elements 14 and 16 of the device 10.
  • the 12 can be made with a rectilinear development of formed by rings connected in a chain. Their length determines the frequency of the device 10. At the two ends they are connected to the elements 14 and 16 of the device 10 by means of punctiform-contact articulated joints, so as to allow the two elements 14 and 16 of the device 10 full freedom of movement in any horizontal direction. With this choice, in its anti-seismic function, the lower element 16 remains subject to the forcing stress, while the upper element 14 will remain substantially still.
  • the overall load of the structure to be insulated will be shared on an adequate number of supports by adopting a rigid platform, while the vibration-damper supports must be positioned on a rigid bed, able to allow the structure to float on the ground beneath.
  • tie rods 12 which are fixed to holding elements, or pivots, connected to the ground affected by the stresses.
  • buffer elements and/or shock-absorber elements may be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

La présente invention concerne un dispositif (10), destiné à isoler de manière réactive une structure de contraintes dynamiques horizontales alternées, qui comprend des éléments d'atténuation capables d'atténuer l'énergie vibratoire entre un soubassement soumis aux charges dynamiques horizontales et la structure située au-dessus de ce dernier et qui reposerait directement sur celui-ci s'il n'y avait pas l'action réductrice des éléments d'atténuation.
PCT/EP2007/054084 2006-04-27 2007-04-26 Dispositif d'isolation reactive de contraintes dynamiques horizontales alternees WO2007125071A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD2006A000110 2006-04-27
IT000110A ITUD20060110A1 (it) 2006-04-27 2006-04-27 Dispositivo per isolamento reattivo da sollecitazioni dinamiche orizzontali alternate

Publications (1)

Publication Number Publication Date
WO2007125071A1 true WO2007125071A1 (fr) 2007-11-08

Family

ID=38269088

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/054084 WO2007125071A1 (fr) 2006-04-27 2007-04-26 Dispositif d'isolation reactive de contraintes dynamiques horizontales alternees

Country Status (2)

Country Link
IT (1) ITUD20060110A1 (fr)
WO (1) WO2007125071A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035009A (en) * 1935-02-28 1936-03-24 Frank L Rager Shock absorbing device
US4328648A (en) * 1980-03-21 1982-05-11 Kalpins Alexandrs K Support system
JPS63135629A (ja) * 1986-11-25 1988-06-08 Nkk Corp 除振・免震装置
US4860507A (en) * 1988-07-15 1989-08-29 Garza Tamez Federico Structure stabilization system
JPH08246705A (ja) * 1994-08-02 1996-09-24 Takayuki Shimazu 構造物の免震装置及び免震構法
JPH09317237A (ja) * 1996-05-29 1997-12-09 Dainippon Doboku Kk 構造物の免震装置及び免震構法
CA2243131C (fr) * 1997-07-11 2003-06-24 Federico Garza-Tamez Dispositif de stabilisation de structure
US6966154B1 (en) * 1997-08-13 2005-11-22 Plandesign International Llc Earthquake protection consisting of vibration-isolated mounting of buildings and objects using virtual pendulums with long cycles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035009A (en) * 1935-02-28 1936-03-24 Frank L Rager Shock absorbing device
US4328648A (en) * 1980-03-21 1982-05-11 Kalpins Alexandrs K Support system
JPS63135629A (ja) * 1986-11-25 1988-06-08 Nkk Corp 除振・免震装置
US4860507A (en) * 1988-07-15 1989-08-29 Garza Tamez Federico Structure stabilization system
JPH08246705A (ja) * 1994-08-02 1996-09-24 Takayuki Shimazu 構造物の免震装置及び免震構法
JPH09317237A (ja) * 1996-05-29 1997-12-09 Dainippon Doboku Kk 構造物の免震装置及び免震構法
CA2243131C (fr) * 1997-07-11 2003-06-24 Federico Garza-Tamez Dispositif de stabilisation de structure
US6966154B1 (en) * 1997-08-13 2005-11-22 Plandesign International Llc Earthquake protection consisting of vibration-isolated mounting of buildings and objects using virtual pendulums with long cycles

Also Published As

Publication number Publication date
ITUD20060110A1 (it) 2007-10-28

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