Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Performance of earth dams under seismic effects assessed by hollow cylindrical torsional shear tests
Key points of performance-based design of a structure are a good prediction of residual deformations and defining damage levels. In this study, a methodology was used to assess residual deformations of an imaginative earth fill dam with a central core under seismic effects. Static and dynamic stress conditions in the imaginative dam were determined by using FEM. Then, these stress conditions were reproduced more realistically in hollow cylindrical torsional shear apparatus by controlling axial and torsional stresses simultaneously. Bulk and shear modulus values were modified by using results of experiments and employed in analysis to predict residual deformations more precisely. Another set of experiments were performed to understand the effect of repeated earthquakes. Torsion shear tests showed that greater strain potentials were observed close to the upstream slope face and initial stress condition in the fill dam is effective on strain potentials that were caused by the effect of earthquake. Greater lateral deformations and settlements were observed close to the upstream slope face also by the numerical analysis. After second loading smaller shear and axial strains were observed than the first one and there was a slight increase in the mean effective stress.
Performance of earth dams under seismic effects assessed by hollow cylindrical torsional shear tests
Key points of performance-based design of a structure are a good prediction of residual deformations and defining damage levels. In this study, a methodology was used to assess residual deformations of an imaginative earth fill dam with a central core under seismic effects. Static and dynamic stress conditions in the imaginative dam were determined by using FEM. Then, these stress conditions were reproduced more realistically in hollow cylindrical torsional shear apparatus by controlling axial and torsional stresses simultaneously. Bulk and shear modulus values were modified by using results of experiments and employed in analysis to predict residual deformations more precisely. Another set of experiments were performed to understand the effect of repeated earthquakes. Torsion shear tests showed that greater strain potentials were observed close to the upstream slope face and initial stress condition in the fill dam is effective on strain potentials that were caused by the effect of earthquake. Greater lateral deformations and settlements were observed close to the upstream slope face also by the numerical analysis. After second loading smaller shear and axial strains were observed than the first one and there was a slight increase in the mean effective stress.
Performance of earth dams under seismic effects assessed by hollow cylindrical torsional shear tests
Einschätzung des Verhaltens von Erddämmen unter seismischer Einwirkung mit Zylinder-Torsionsscherversuchen
Sendir Torisu, S. (Autor:in) / Towhata, I. (Autor:in)
2009
6 Seiten, 9 Bilder, 2 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
Torsion , Drehschwingung , Torsionsspannung , Torsionsversuch , mechanische Prüfung , Scherfestigkeit , Torsionsprüfung , Erddamm , Erdaufschüttung , Damm , Dammbau , Bauingenieurwesen , Erdbau , Seismologie , Erdbeben , erdbebensicheres Bauwerk , Modell , mathematisches Modell , mechanisches Modell , Finite-Elemente-Methode , numerisches Verfahren , Entwurf , Festigkeitslehre
Performance of earth dams under seismic effects assessed by shaking table tests
| Tema Archiv | 2009
Field tests of torsional cylindrical shear testing system
| British Library Conference Proceedings | 1995
Seismic effects on earth fill dams
| Engineering Index Backfile | 1965