000011288 001__ 11288
000011288 005__ 20141205155855.0
000011288 04107 $$aeng
000011288 046__ $$k2008-10-12
000011288 100__ $$aPaolucci, Roberto
000011288 24500 $$aShaking Table Experiments and Simplified Numerical Simulation of a Shallow Foundation Test Model

000011288 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011288 260__ $$b
000011288 506__ $$arestricted
000011288 520__ $$2eng$$aThe set of experiments carried out at the Public Works Research Institute, Tsukuba, Japan, is a unique opportunity to analyze the seismic behaviour of shallow foundations under seismic loading of various levels of intensity up to complete failure. The experimental set up consists of a shallow foundation test model (0.5m x 0.5m in plan) located at the surface of a laminar shear box (4m x 4m in plan and 2.1 m high), filled in with dry Toyoura sand. The box is shaked at its base with a sequence of excitations of various degree of intensity, representative of the seismic input motion used for seismic design in Japan. In this contribution the experiments are simulated using a simplified approach consisting of a single degree-of-freedom structure founded on a compliant foundation with 3 degrees-of-freedom (vertical, horizontal, rocking). The nonlinear behaviour of the soil-foundation system is allowed by numerical modelling using a nonlinear elasto-perfectly plastic macro-element, defined by a suitable yield surface and plastic flow rule. The results of the numerical analyses are very satisfactory in terms of the accurate simulations of the time history of overturning moments, driving the nonlinear behaviour of the foundation. The simulation of the accumulated settlements and rotations was much more difficult: satisfactory results were obtained by using a suitable stiffness degradation rule as a function of the total plastic rotation accumulated during shaking. These results throw light on the debated issue of the foundation ductile behaviour during strong seismic shaking and on its possible role in the evolution of performance-based design concepts including nonlinear soil-structure interaction.

000011288 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011288 653__ $$ashallow foundations, dynamic soil-structure interaction, shaking table tests, nonlinear macro-element

000011288 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011288 720__ $$aPaolucci, Roberto$$iShirato, Masahiro$$iYilmaz, M.Tolga
000011288 8560_ $$ffischerc@itam.cas.cz
000011288 8564_ $$s352911$$uhttps://invenio.itam.cas.cz/record/11288/files/04-02-0127.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-02-0127.
000011288 962__ $$r9324
000011288 980__ $$aPAPER