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Soil bentonite wall protects foundation from.thrust faulting: analyses and experim.nt

Earthquake Engineering and Engineering Vibration 2013年第3期12卷 473-486页

作者： m.ysam.Fadaee I. Anastasopoulos G. Gazetas m.K. Jafari m. kamalian International Institute of Earthquake Engineering and Seism.logy School of Civil Engineering National Technical University

When seism.c thrust faults em.rge on the ground surface, they are particularly dam.ging to buildings, bridges and lifelines that lie on the rupture path. To protect a structure founded on a rigid raft, a thick diaphragm.type soil bentonite wall （SBW） is installed in front of and near the foundation, at sufficient depth to intercept the propagating fault rupture. Extensive num.rical analyses, verified against reduced-scale （1 g） split box physical m.del tests, reveal that such a wall, thanks to its high deform.bility and low shear resistance, ＂absorbs＂ the com.ressive thrust of the fault and forces the rupture to deviate upwards along its length. As a consequence, the foundation is left essentially intact. The effectiveness of SBW is dem.nstrated to depend on the exact location of the em.rging fault and the m.gnitude of the fault offset. When the latter is large, the unprotected foundation experiences intolerable rigid-body rotation even if the foundation structural distress is not substantial.

关键词： soil bentonite wall fault rupture soil-structure interaction seism.c hazard m.tigation tectonic deform.tion soil-foundation interaction

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New Relationship for Estim.tion of Wave Overtopping on Vertical Walls

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China Ocean Engineering 2017年第1期31卷 48-54页

作者： ESKAND ARI Hojjatollah kamalian Ulrich Reza Coastal Engineering Group University of Qom Qom *** Iran

Soft com.uting tools in the form.of com.ination of m.ltiple nonlinear regression and m.′ m.del tree were used for estim.tion of overtopping rate at the vertical coastal structures. For reliable and precise estim.tion of overtopping rate, the experim.ntal data available in the database CLASH were used. The dim.nsionless overtopping rate was estim.ted in term. of conventional dim.nsionless param.ters including the relative crest freeboard Rc/Hs, seabed slope tanθ, deep water wave steepness S（om., surf sim.larity ξ（om. and local relative water depth ht/Hs. The accuracy of the new m.del was com.ared with other existing m.dels and also evaluated with som. field m.asurem.nts. The results indicated that the m.del presented in this paper is m.re accurate than other existing m.dels. With statistical param.ters, it is shown that the accuracy of predictions in the new m.del is better than that of other m.dels.

关键词： sim.larity dim.nsionless precise Walls crest form.lae trained coastal separate correction

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