000009540 001__ 9540
000009540 005__ 20141205150216.0
000009540 04107 $$aeng
000009540 046__ $$k2008-10-12
000009540 100__ $$aBilotta, Emilio
000009540 24500 $$aAn Early-Stage Design Procedure for Circular Tunnel Lining under Seismic Actions

000009540 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009540 260__ $$b
000009540 506__ $$arestricted
000009540 520__ $$2eng$$aThe increments of the internal forces induced by an earthquake in the transverse section of a tunnel lining can be ascribed to the ovalisation of the section, induced by soil shear straining in the vertical plane. They can be assessed with several procedures at different levels of complexity. In this paper, two kind of analysis were per-formed on idealised geometry and soil conditions, considered representative of soil classes specified by Euro-code 8: pseudo-static analysis, where the seismic input was reduced to an equivalent peak strain amplitude, computed through a free-field pseudo-static analysis of the ground and then considered acting on the tunnel lining in static conditions; and full dynamic analysis, where the soil and tunnel responses were mechanically coupled and modelled by using FEM. Both were performed considering the soil as an equivalent linear medium. On the basis of the comparison of the results of both approaches, modification factors of the usual pseudo-static formulae are proposed, which take into account the kinematic interaction between the tunnel and the ground during shaking. The method, based on the use of simple charts, can be easily adopted for early-stage design.

000009540 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009540 653__ $$atunnels, lining, seismic actions, pseudo-static, dynamic 

000009540 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009540 720__ $$aBilotta, Emilio$$iLanzano, Giovanni$$iRusso, Gianpiero$$iSantucci de Magistris, Filippo$$iSilvestri, Francesco
000009540 8560_ $$ffischerc@itam.cas.cz
000009540 8564_ $$s323483$$uhttps://invenio.itam.cas.cz/record/9540/files/08-02-0049.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 08-02-0049.
000009540 962__ $$r9324
000009540 980__ $$aPAPER