Structural bearing

Abstract

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.

Claims

1. A structural bearing having at least one sliding element made of a sliding material that contains at least one polymeric plastic, wherein the sliding material has a melting point temperature of more than 210 C. and a modulus of elasticity in tension according to DIN ISO 527-2:2012 of less than 1800 MPa, wherein the sliding material further has a characteristic compressive strength of at least 250 MPa at 48 C. and/or at least 220 MPa at 70 C. and/or at least 200 MPa at 80 C. and wherein the sliding material contains a polyketone as the polymeric plastic.

2. The structural bearing according to claim 1, wherein the unlubricated sliding material in a short-time sliding friction test pursuant to EN 1337-2:2004 supplement D has a maximum friction coefficient at 21 C. and a contact pressure of 60 MPa of at least 0.05.

3. The structural bearing according to claim 1, wherein the sliding material has a ratio of static friction coefficient to dynamic friction coefficient (.sub.s/.sub.dyn) that is smaller than 1.4.

4. The structural bearing according to claim 1, wherein the sliding material has a yield strength of more than 15%.

5. The structural bearing according to claim 1, wherein the sliding material is vulcanized onto an elastomer.

6. The structural bearing according to claim 1, wherein the sliding material contains a polyamide having a water saturation of at least 5%, as the polymeric plastic.

7. The structural bearing according to claim 1, wherein a water supply for ensuring a permanent water saturation of the sliding material is assigned to the sliding element.

8. The structural bearing according to claim 1, wherein the sliding element is disposed in a water-holding basin.

9. The structural bearing according to claim 1, wherein the sliding element at least partially is surrounded by a water vapor-holding casing.

10. The structural bearing according to claim 1, wherein the sliding material in addition to the at least one polymeric plastic contains at least one further polymeric plastic and/or at least one filler or an additive.

11. The structural bearing according to claim 1, wherein the sliding material has been cross-linked by means of radiation and/or chemical treatment.

12. The structural bearing according to claim 1, wherein it is configured as an energy-dissipating friction pendulum bearing.

13. The structural bearing according to claim 1, wherein it is configured as an elastomeric sliding bearing.

14. The structural bearing according to claim 13, wherein individual sub-segments of the sliding disc comprise another sliding material of a polyamide, a PTFE and/or a UHMWPE.

15. The structural bearing according to claim 1, wherein the sliding element is configured as a flat sliding disc and/or curved sliding disc.

16. The structural bearing according to claim 15, wherein the sliding disc is configured in segments and has at least two sub-segments.

17. The structural bearing according to claim 16, wherein the sliding disc is configured from a plurality of sub-segments that are preferably round and have a diameter of 20 to 50 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following the invention is explained in detail by way of an example. Here:

(2) FIG. 1 schematically shows a partial section through a structural bearing according to the invention with a disc-shaped sliding element.

DETAILED DESCRIPTION

(3) The structural bearing 1 shown in FIG. 1 in a partially sectioned illustration (left part of the illustration) is a sliding bearing that is configured as a so-called spherical sliding bearing of a basically known design. Here, this is shown only to illustrate what a structural bearing is basically meant to be. However, with respect to the present invention the design of the bearing is not important. That is, it could also be an arbitrarily differently designed structural bearing with a sliding element 6 according to the invention.

(4) The structural bearing 1 shown in FIG. 1 has an upper plate 2, a spherical cap 3, a lower plate 4, a sliding plate 5, and a sliding element 6 in a sliding contact with the sliding plate 5 in the form of a flat sliding disc made of polymeric plastic. Moreover, the bearing has a second curved sliding element 7. This is in sliding contact with the curved surface of the spherical cap 3.

(5) The structural bearing 1 shown here is such one in which according to the invention a sliding material for the sliding elements 6 and 7 is used that 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.

(6) In the present case the sliding material consists of a polyketone and also at high temperatures has relatively high values of characteristic compressive strength of ca. 250 MPa at 48 C., ca. 220 MPa at 70 C. and ca. 200 MPa at 80 C.

(7) Moreover, the sliding material has a relatively high yield strength of up to 30%. This enables the sliding element to elastically adapt to an eccentrically occurring deformation. Just with a flat sliding bearing (as the one shown here) this is particularly advantageous since this way it can better compensate tilts of the building (e.g. due to settlements of the building or manufacturing tolerances).