000019859 001__ 19859
000019859 005__ 20170118182340.0
000019859 04107 $$aeng
000019859 046__ $$k2017-01-09
000019859 100__ $$aLüders, Carl
000019859 24500 $$aNew Design Philosophy for Vertical Anchor Rods of Bridges

000019859 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019859 260__ $$b
000019859 506__ $$arestricted
000019859 520__ $$2eng$$aThe seismic anchor elements of bridges are vertical steel bars that connect the slab of the superstructure with the bearing seat of the substructure. These bars are currently used on bridges in Chile and have the purpose of preventing the lifting of the superstructure during strong earthquakes. The Highways Manual and the New Seismic Design Criteria for Bridges of the Department of Public Works only specify the minimum strength they must have. They do not specify any prestress for them, no minimum or maximum distance between the anchor point to the bearing seat and anchorage point of them to the bridge deck, and no maximum or minimum length of these bars. In this paper the variables listed above, and the seismic behavior of bridges supported by elastomeric bearings that are fixed to the heel of the beams of the bridge, but can slip on the bearing seat, are analyzed. The elastomeric bearings are designed to be able to withstand the vertical loads of the bridge, the bridge temperature deformations and the maximum shear stress that can be generated in them because of the friction between the bearing seat and the elastomeric bearing. The support system is also designed so that the elastomeric bearing is able to accept temperature deformations of the bridge without sliding on the bearing seat. For strong earthquakes, the bearing slip on the bearing seat and seismic anchor elements provide restitution forces, to prevent span unseating and almost bring them back to its original position. Small permanent deformations after a strong earthquake may require a minor alignment of the superstructure. The friction between the elastomeric bearing and the bearing seat provides damping to the system. The proposed solution will improve the seismic performance and reduce the cost of the bridges because it decreases the stresses and strains in abutments and piers, as with a formal seismic isolation.

000019859 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019859 653__ $$aBridges; Seismic behavior; Seismic anchor cables; Elastomeric bearings.

000019859 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019859 720__ $$aLüders, Carl$$iHube, Matias$$iCriado, Maryuri
000019859 8560_ $$ffischerc@itam.cas.cz
000019859 8564_ $$s911340$$uhttps://invenio.itam.cas.cz/record/19859/files/4562.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4562.
000019859 962__ $$r16048
000019859 980__ $$aPAPER