摘要:
The present invention relates to a sliding bearing for structural engineering applications, in particular for civil works such as bridges, buildings, structures that are required at the same time to withstand vertical loads and to allow relative movements and/or rotations, and structures to be protected against seismic events, said bearing having a low friction coefficient and being suitable for being used in severe operating conditions, both due to the loads applied and to particularly high operating temperatures. The bearing, which is of the type comprising a first part (2) connected to a supporting structure (P), a second part (3) connected to an element (G) to be supported by said supporting structure (P) and means suitable for allowing said second part (3) to translate and/or rotate with respect to said first part (2), said means comprising plates (4) and/or strips of a low-friction polymer material, is characterized in that said low-friction material is a polyamide.
摘要:
A fixable unilateral sliding support, comprising a roof (1), a footstock (2), a top sliding panel (11), a base sliding panel (22), a ball-pivot (3), a pillar-bolt (4), locknuts (5), lockscrews (52), a pillar-bolt base (6) and a baseplate (7), the footstock (2) is located between the two lugs on the underside of the roof (1), the underside of the roof (1) is perpendicular to the lugs, and a grove (13) is respectively formed near the both sides of the footstock (2), in which a locking key (14) being formed of a "L" shape can be inserted in order to lock the sliding support. Two screws (141,131) respectively are formed at the corresponding positions of the locking key (14) being formed of a "L" shape and the groove (13) of the roof (1), through which bolts (15) passes in order to fasten the rib (142) of the locking key (14) into the groove (13) of the roof (1). The invention also relates to the application method of connecting two simply supported beams into quasi continuous beam by said sliding support.
摘要:
A seismic isolation bearing includes a lower assembly, an intermediate assembly, and an upper assembly. The intermediate assembly is mounted on the lower assembly for X-axis linear movement relative to the lower assembly, and sloped wedges acting between the lower and intermediate assemblies generate a gravitational restoring force biasing the intermediate assembly back toward a neutral X-axis position with respect to the lower assembly in the event of seismically induced displacement. The upper assembly is mounted on the intermediate assembly in a similar manner for orthogonal Y-axis linear movement. Cylindrical rollers, friction reducing shoes, or low-friction interfaces are used between wedge surface portions to allow a small wedge slope angle. A buffer spring and damper unit are preferably provided between the lower and intermediate assemblies and between the intermediate and upper assemblies. Sweeper plates connected to the rollers are disclosed to provide self-cleaning of the wedge surface portions. Sacrificial and/or resiliently-mounted protective caps and sealing strips house the bearing and help shield it from environmental debris.
摘要:
The invention relates to a sliding bearing (110, 210; 310) for constructions, said bearing (110; 210; 310) comprising at least one first and one second components (111; 112; 211, 212, 213; 311, 312, 313) operably connected to one another and configured to withstand a vertical or transverse load, as well as at least one pair of sliding surfaces (121, 122; 221, 222, 223, 224; 321, 322, 323, 324) arranged between said first and second components so as to allow mutual movements and/or rotations thereof. One of the sliding surfaces (121; 221, 223; 321, 323) of the pair of sliding surfaces is a plate made of a polymeric material mounted on one between the first and second components and the other sliding surface (122; 222, 224; 322, 324) is a metal surface associated to at least a portion of the face of the other member facing the polymeric material plate. The polymeric material plate is made of polytetrafluoroethylene (PTFE) modified by addition of perfluoropropylvinylether (PPVE) in percentages ranging between 0.1% and 0.3% by weight.
摘要:
The present invention concerns an anti-seismic support for supporting a construction engineering structure, which comprises a support (14) having a concave sliding surface (17) and a sliding block (16) with a convex sliding surface (16d) in sliding contact with the concave sliding surface (17), the sliding block (16) being capable of sliding with pendulum motion relative to the concave surface (17) in response to an earthquake tremor or shock, the device (11) comprising a sliding material (19) between the concave sliding surface (17) and the convex sliding surface (16b), where the friction coefficient between the sliding surfaces (16b, 17) is above 10% when the device (11) is loaded with a pressure above 30 MPa and the sliding surfaces are caused to slide at a sliding speed of more than 50 mm/s at a temperature of 20°C or more.
摘要:
The present invention relates to a seismic isolating technique, and more particularly, to a ball bearing-type seismic isolator with a conical groove to be installed beneath heavy equipment to prevent the equipment from being turned over upon the occurrence of an earthquake. The seismic isolator of the present invention comprises: a lower plate, the upper surface of which has a lower sliding groove; an upper plate with an upper sliding groove opposite the lower sliding groove; and a ball interposed between the upper plate and the lower plate so as to be brought into rolling contact with the upper sliding groove and the lower sliding groove. The upper sliding groove and the lower sliding groove are formed into conical shapes with the same tilt angle, and each of the surfaces of the upper and lower sliding grooves brought into contact with the ball and the ball have a plurality of stopper grooves or stopper protrusions formed at a predetermined spacing. The seismic isolator of the present invention prevents a structure or the equipment installed thereon from being inclined even upon the occurrence of external vibrations such as those from a strong earthquake, thereby reducing the risk of damage caused by the rollover of the structure or the equipment. In addition, the seismic isolator of the present invention increases frictional resistance between the ball and the sliding grooves to provide constant rolling contact therebetween, thereby preventing the upper and lower plates from being inclined even upon the occurrence of external vibrations such as those from a strong earthquake, and quickly stopping vibrations by the loss of energy caused by the frictional force.
摘要:
The present invention provides a bearing system, particularly suited to bridges and other civil engineering applications, which more readily stands hostile environments over extended periods. The bearing system includes one or more contact surfaces (34) in which the contact surface is formed from a fiber reinforced material. The use of fabric reinforced thermosetting resins is preferred. The contact surface (34) may additionally be provided with a series of recesses (50) filled with lubricating material.
摘要:
Die Erfindung betrifft allgemein Bauwerks-Gleitlager, welche aus wenigstens einem ersten Lagerteil bestehen, an dem wenigstens ein Gleitelement befestigt ist und einem dazu relativ verschieblich angeordneten zweiten Lagerteil, welches in Paarung mit der Kontaktfläche A K des Gleitelementes eine Gleitfläche bildet, die Gleitbewegung zwischen den beiden Lagerteilen ermöglicht. Kennzeichnend für die Erfindung ist, dass die Form der Kontaktfläche (A K ) des Gleitelements (20) so gestaltet ist, dass sich eine gewünschte Reibungszahl (Y) in der Gleitfläche (30) einstellt. Ferner wird ein Verfahren aufgezeigt, mit welchem die Reibungszahl (Y) in der Gleitfläche (30) unter Berücksichtigung eines Formfaktors (S) eingestellt wird. Ferner wird ein Bemessungsverfahren vorgestellt, bei dem die Reibungszahl unter Berücksichtigung eines Formfaktors gezielt eingestellt wird.
摘要:
A spherical bearing is disclosed, which is easy to make, can be made small, and does not have a sticking problem of a spherical block. The spherical bearing includes a plastic spherical block made of plastic and including a convex spherical surface, a spherical groove member including a spherical groove with which the convex spherical surface engages and surface-contacts and allowing rotation with respect to the plastic spherical block, and a weight-delivering member installed opposite to the spherical groove member with the plastic spherical block in the middle, and wherein a frictional surface of the plastic spherical block rubbing against the spherical groove member or the weight-delivering member is made of engineering plastic such as PA, POM etc. having a hardness of 75D through 95D.
摘要:
The invention is a bearing assembly having upper and lower bearing seats and a sliding load bearing member between the seats. The sliding member is fitted with elastic self-centering means. The assembly in operation damps relative horizontal movement between the upper and lower seats, the self-centering means returning the sliding member to a centered position at rest. Typically a structure rests upon and is secured to the upper seat and the lower seat rests upon or is fixed to a foundation. The relative horizontal movement may be caused by earthquakes, wind loads or the like.