摘要:
Disclosed is a friction damper that has a unique load-displacement hysteresis characteristic such that, when the frictional coefficient between members that generate friction is smaller than the slope of an inclined surface, the friction damper is always returned to the original position thereof in a case where an external force is removed or remains at a level that does not exceed a threshold value. The V-groove friction damper includes: a V-groove member including a concave V-shaped groove; a V-shaped frictional contact member including a V-shaped frictional contact portion; a guide member configured to guide a left/right movement of the V-groove member; and an elastic compression unit installed on the guide member, and configured to elastically compress the V-shaped frictional contact member toward the V-groove member.
摘要:
A structural bearing is provided having at least one sliding element made of a sliding material that contains at least one polymeric plastic, wherein the siding material has a melting point temperature of more than 210° C. and a modulus of elasticity in tension according to DIN ISO 527-2 of less than 1800 MPa.
摘要:
A hydraulic jack system for lifting a load is disclosed comprising a hydraulic cylinder having a hydraulic piston for displacing loads and a locking ring for locking the hydraulic cylinder in place when pressure is removed from the hydraulic cylinder. The jack system also has a gear operatively connected to the locking ring for displacement of the locking ring and a top plate connected to the hydraulic piston for receiving the load. A bottom plate connected to the hydraulic cylinder to provide support to the hydraulic cylinder is also disclosed and, securing means for attaching the bottom plate to the hydraulic cylinder wherein the securing means allow for movement of the bottom plate when the hydraulic jack system is lifting a load.
摘要:
A shock suppressor has a first base, a second base, a sliding tray and a slider. The first base has a first guiding recess. The second base is mounted above the first base at an interval and has a second guiding recess facing the first guiding recess of the first base. The sliding tray is slidably mounted in the first guiding recess of the first base and has a sliding recess and a convex surface slidably mounted on and abutting against the first base in the first guiding recess. The slider is slidably mounted between the sliding recess of the sliding tray and the second guiding recess of the second base and has two convex faces. The abutments between the first base, the sliding tray, the slider and the second base can provide three concave sliding mechanisms to the shock suppressor.
摘要:
The assembly includes a one group (40A to 40C) of hydraulic shock absorbers (42), each shock absorber (42) comprising a hydraulic jack comprising a cylinder designed to be supported by the first element (14), and a shock-absorbing member partially received in the cylinder. The shock-absorbing member has a head protruding outside the cylinder, the head being designed to come into contact with the second element during mounting of the second element on the first element (14).The shock-absorbing assembly (17) includes, for each group (40A to 40C) of shock absorbers (42), a fluid accumulator (44) connected to each cylinder of the group of shock absorbers (42), to allow a hydraulic fluid transfer between the different cylinders of the group of shock absorbers (42) during contact between each head and the second element.
摘要:
A modular base isolation system suitable for constructing isolation floors and platforms using the same elements, and capable of scaling up or down to suit the payload mass. These systems are low profile and permit placement of such systems un paces having restricted headroom. Also kits and methods or making and using such modular isolation systems.
摘要:
A seismic isolation mechanism 1 includes a seismic isolation apparatus 6 which is installed at one end 2 in a vertical direction V on a superstructure 3 and installed at another end 4 in the vertical direction V on a floor 5 serving as a foundation or a substructure to isolate the vibration of the superstructure 3 with respect to the floor 5; an attenuation damper 10 which is connected at one end 7 in the horizontal direction H to the superstructure 3 and connected at another end 8 in the horizontal direction H to a portion 9 of the seismic isolation apparatus 6 between the one end 2 and the other end 4 thereof to attenuate the vibration of the superstructure 3 with respect to the floor 5 as it is extended and contracted in the horizontal direction H; and an attenuation damper 13 which is connected at one end 11 in the horizontal direction H to the floor 5 and connected at another end 12 in the horizontal direction H to the portion 9 of the seismic isolation apparatus 6 to attenuate the vibration of the superstructure 3 with respect to the floor 5 as it is extended and contracted in the horizontal direction H.
摘要:
Disclosed is a magnetically controlled base isolation system that in a simple, practical, and cost effective way significantly reduces the lateral forces transmitted to buildings, bridges, and other structures during earthquakes. It comprises sliding bearings that are constructed with steel elements, elastomeric O-rings, and permanent magnets; contain a pressurized fluid; and slide over electricity-conducting metallic base plates. It also comprises permanent magnets disposed at the periphery of the metallic base plates. The pressurized fluid carries the bulk of the vertical load supported by each bearing, minimizing thus the magnitude of the frictional forces that resist the bearings' sliding. The motion of the permanent magnets in the sliding bearings over the electricity-conducting base plates generates damping forces that reduce the bearings' relative displacements to practical levels. The peripheral permanent magnets induce re-centering forces on the bearings and forces that prevent the traveling of the bearings beyond the base plates' boundaries.
摘要:
An improvement in the structure of an anti-shock device utilized for buildings, important structures and bridge structures that are made of a base, a carrier, a slide block, and a plurality of springs. A slip concavity of a sunken round curved recess is respectively formed in the base top surface and in the carrier bottom surface, and an upper slide block member and a lower slide block member are situated between the two slip concavities. One contact surface between the two slide block members and slip concavities is of a curved contour and the other surfaces are indented seating recesses. A spheroid coupling bearing is nested between the two seating recesses and the upper and lower slide block members are held together by the springs. As so assembled, the anti-shock device base is fastened under the columns of a building structure such that the building achieves the objectives of exceptional shock eliminating capability and greater building structure safety.
摘要:
An improvement in the structure of an anti-shock device utilized for buildings, important structures and bridge structures that is comprised of a base, a carrier, a slide block, and a plurality of springs. A slip concavity of a sunken round curved recess is respectively formed in the base top surface and in the carrier bottom surface, and an upper slide block member and a lower slide block member are situated between the two slip concavities. One contact surface between the two slide block members and slip concavities is of a curved contour and the other surfaces are indented seating recesses. A spheroid coupling bearing is nested between the two seating recesses and the upper and lower slide block members are held together by the springs. As so assembled, the anti-shock device base is fastened under the columns of a building structure such that the building achieves the objectives of exceptional shock eliminating capability and greater building structure safety.