The tree Melaleuca quinquenervia invades all types of habitats of South Florida leading to up to 80% loss of aboveground diversity. To examine impacts on the belowground ecosystem, we investigated the composition and diversity of nematodes from soils dominated by the invasive tree and compared them with soils supporting native plant communities at six locations across the Florida Everglades ove...

Steel-strip reinforced earth walls stabilize through the pullout resistance of reinforcements. Soil dilation during ribbed reinforcements may contribute to evolution resistance; however, few studies have clarified this mechanism by investigating how soils behave with increasing displacement. The ribs enhance resistance, although influence rib dimensions on displacement has not been sufficiently...

This paper presents a suitable and quick way to choose earthquake records in non-linear dynamic analysis using optimization methods. In addition, these earthquake records are scaled. Therefore, structural responses of three different soil-frame models were examined, the change in maximum displacement of roof was analyzed and the damage index of whole structures was measured. The soil classifica...

The scattering of SV waves by a canyon in a fluid-saturated, poroelastic layered half-space is modeled using the indirect boundary element method in the frequency domain. The free-field responses are calculated to determine the displacements and stresses at the surface of the canyon, and fictitious distributed loads are then applied at the surface of the canyon in the free field to calculate th...

Abstract—This study was conducted to evaluate the seismic performance of weir structures using two different approaches: i) design response spectrum with respect to KBC 2009 in Korea and ii) acceleration of time history (PGA, 0.3011 g) obtained from 1994 Northridge earthquake. This paper provided the simple linear elastic 2D plane strain FE model with the material nonlinearity including soil-fo...

Secondary dispersal is an important stage in the life cycle of tree species, determining the fate of a high proportion of all seeds. For small-seeded species both physical and biological processes may influence the secondary fate of seeds, however the relative importance of these processes is not well known. Seeds of the pioneer tree species Cecropia insignis (seed mass 0.5 mg), Trema micrantha...

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A numerical study that focuses on the maximum displacement response of reinforced concrete structures subjected to earthquake loading is presented. The specific item of the interest is the increase in maximum displacement caused by biaxial base excitation as compared with that for uniaxial base excitation. The maximum displacement of structural systems structures subjected to uniaxial base exci...

This paper presents a numerical methodology to analyze frame structures supported on footing foundations subjected slow strains caused by consolidation settlements. A building project subsurface layer of soft soil has been analyzed. The Boundary Element Method with the Mindlin fundamental solution applied compute displacement resulting from interference between pressure bulbs foundation. rheolo...