June 29, 2008

The Effects of Thermal Bridging at Interface Conditions

By: Totten, Paul E., Sean OBrien, Pazera, Marcin

Abstract: Thermal bridging in buildings can contribute to a multitude of problems, including, but not limited to, added energy use during heating and cooling seasons and interior surface condensation problems.|Thermal bridges are discontinuities...

June 29, 2008

NSAR in Concrete Slabs

By: Craig P., Pinelle, Dennis J., Mauro Scali, Matthew Sherman

Over the years, we have had a number of call-backs on projects where our epoxy coating applications had developed fluid-filled blisters. When we had these problems investigated, we found that osmosis was most likely the...

June 29, 2008

The Beams Are Too Bouncy?

Abstract: If you practice structural engineering long enough, you will likely find your firm embroiled in a situation of controversy sooner or later. You may even be blamed as causing the problem. Our experience suggests when this happens, it...

June 29, 2008

On the Grid

Abstract: Seismic isolators, sandwiched between two steel grids, separate an existing San Francisco building from its vertical addition.

April 29, 2008

Problems with the partially engineered house

Abstract: Most wood-frame houses are built without the benefit of structural design. Often, when engineered wood components are called for, the local building official will insist that these elements be designed by a registered professional...

April 29, 2008

The importance of proper detailing and design on the performance of wood assemblies exposed to the environment

By: Judson Taylor, Kuivanen, David P.

Abstract: Wood has been, and will continue to be, a valuable resource for construction. Wood is user-friendly and, properly managed and processed, environmentally friendly. While vulnerable to the environment from which it grew, properly designed...

April 29, 2008

Experimental validation of building vibration propagation using a four story laboratory model

By: Michael Hughes, Sanayei, Masoud, Moore, James A., Zapfe, Jeffrey A., White, Robert D.

Abstract: A 4-story scale model building was designed and constructed for the purpose of predicting vibration levels at each floor. Mathematical models of column, beam, and slab elements were developed and combined, forming a system model. Each...

April 29, 2008

Crack propagation evaluation of polymer composite FRP panels subjected to static and cyclic loading

By: Erbay, Omer, Phillip Sharff

Abstract: This paper summarizes a multiphase analytical and experimental study on evaluating the propensity for small delaminations in fiber-reinforced-plastic (FRP) composite panels to propagate under both static and cyclic (wind) loads. Finite-...

April 29, 2008

Approximation for seismic analysis of not-flat-bottom axisymmetric tanks

By: Atis Liepins, Juneja, Gunjeet

Abstract: Our proposal that some of the parameters of the two-mass model for a not-flat-bottom tank may be approximated with sufficient accuracy for use in design by an equivalent cylindrical tank with a flat bottom with the same volume and free...

April 29, 2008

Design requirements for prequalified steel moment connections: Their historic development and present-day use

By: Ronald Hamburger, Hewitt, Christopher M.

Abstract: While engineers in the Western U.S. are likely familiar with the rigorous connection design requirements instituted following the Northridge earthquake, many engineers in the central and eastern U.S. are just becoming familiar with the...