P-delta actions in seismic resistant structures

Seismic Control of Asymmetric Structures

This paper presents results of an investigation on how supplemental viscous damping can be used to control excessive deformations in asymmetric-plan buildings. It is shown that symmetric distribution of supplemental damping devices in the building plan is not necessarily the best way to control excessive deformations in an asymmetric-plan building; a value of the damping eccentricity equal to t...

Seismic performance of transportation structures

Revolutionary changes which have taken place in the USA over the past 50 years in earthquake engineering as applied to transportation structures (highway bridges, and transit and high-speed rail aerial structures) are reviewed, giving emphasis to seismic design criteria, characterization of seismic ground motions, dual strategy of seismic design, modelling and dynamic analysis, assessment of se...

Delta degrees of freedom in antisymmetrized molecular dynamics and (p,p') reactions in the Delta region.

Delta degrees of freedom are introduced into antisymmetrized molecular dynamics (AMD). This is done by increasing the number of basic states in the AMD wave function, introducing a Skyrme-type delta-nucleon potential, and including NN ↔ N∆ reactions in the collision description. As a test of the delta dynamics, the extended AMD is applied to (p,p′) recations at Elab = 800 MeV for a 12C target. ...

Seismic strengthening and seismic improvement of timber structures

In European seismic areas timber structures are found as building frames, in combination with masonry infills, in bridges, but most frequently in roof structures and floor slabs of traditional buildings. Seismic strengthening of existing structures should provide a well-defined and simple path to seismic forces, maintain timber members elastic, and develop as much as possible the post-elastic b...

Terahertz gain on intersubband transitions in multilayer delta-doped p - Ge structures