April 2010

Importance of spatial variability of seismic ground motion effects on long beams response

  Rigorous seismic analysis of long structures requires a complete description of the free field ground motion. At a given site, the recorded motions at distinct points are different; this may induced by loss of seismic wave’s coherency, wave passage effect, site response effect and attenuation of seismic waves. In this paper, the effects spatial variability of ground motion (SVGM) on the stochastic...

Author(s): Nourredine Mezouer, Kamel Silhadi and Hamid Afra

April 2010

Forest roads planning and construction in Iranian forestry

  The total length of Hyrcanian forest roads in Iran at the end of year 2009 was about 10000 km. Forest roads facilitate timber harvest and attainment of other multiple use objectives requires a high capital investment. A mistake in planning a road, such as ignoring the effects of environmental and other parameters leads not only to the waste of public investment but also to adverse environmental impacts and...

Author(s): Aidin Parsakhoo, Majid Lotfalian and Seyed Ataollah Hosseini