<p>This study aims at researching damage mechanism of tunnel portal and front slope caused by seismic excitation, while post-earthquake field investigations and shaking table tests were conducted. Seismic damage mechanism can be drawn from comparison between ...

<p>Underground structures constitute crucial components of the transportation networks. Considering their significance for modern societies, their proper seismic design is of great importance. However, this design may become very tricky, accounting of the ...

Physical testing of rock support for rockbursting conditions has been carried out for over 40 years. A review of this testing shows that it has been mostly component–based, rather than actually testing support systems. Further, it is concluded that none of ...

This paper presents a study of the dynamic analysis of a building before and after devastating earthquakes using system identification. The eight storey reinforced concrete building is instrumented with 10 accelerometers. The time domain N4SID system identification ...

<p>In this stydy have been used observations from Felzer and Brodsky (2006) of the variation of linear aftershock densities (i.e., aftershocks per unit length) with the magnitude of and distance from the main shock fault to derive constraints on how the probability ...

The 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 ...

<p>Critical for the seismic safety of immersed tunnels is the magnitude of deformations developing in the segment joints, as a result of the combined longitudinal and lateral vibrations. Analysis and design against such vibrations is the main focus of this ...

This paper, jointly prepared by dam engineers from Japan and the United States, discusses the role of nonlinear dynamic analyses in seismic evaluation problems in these two countries.

<p>In China the programs for developing the western region are carrying out successfully. Abundant hydropower potential, about 80% of the national total, is a superior resource in this region. The hydropower sustainable development is critical not only for ...

<p>Debris flow is a common process in the Swiss Alps and in other mountainous parts of the world. The understanding of debris-flow behaviour is essential to assess the hazards they present. An important approach towards improving the knowledge of debris-flow ...