Knowledge Sharing

June 3, 2016

Comparison of Procedures for Computing Seismic Displacement Demand

By: William Bruin, Rakesh Goel, Julie Galbraith

For the seismic design of pier and wharf structures, there are multiple methodologies permitted for determining displacement demands. The current edition of MOTEMS and ASCE 61-14 permits use of an iterative substitute structure...

June 3, 2016

Seismic Retrofit of a 1960s Reinforced Concrete Marine Terminal with Perimeter Seismic Dolphins

A 1960s era California marine oil terminal was determined to be a possible collapse hazard in a major earthquake. Rather than replace the structures with an estimated construction cost of over $100M (plus millions more in operational...

June 3, 2016

Seismic Design of Loading Arms and Hose Towers

Historically, the seismic design of topsides structures like marine loading arms and hose towers has been done inconsistently and to a wide array of design codes and requirements. The root of this problem has been a forced reference...

May 5, 2016

Shake-Table Tests of a Full-Scale Two-Story Shear-Dominated Reinforced Masonry Wall Structure

By: Marios Mavros, Farhad Ahmadi, Pui-Shum Shing, Richard Klingner, David McLean, Andreas Stavridis
This paper presents the shake-table tests of a full-scale, two-story, reinforced masonry shear-wall structure designed by a displacement-based method. The test structure had two T-sectioned and one rectangular-sectioned wall components
April 21, 2016

Water Vapor Migration 101: The Basics of Vapor Retarders

Vapor retarders play an important role in controlling water vapor flow and can be a major element in durable building enclosure design. (Note: Although there is some debate in the industry over terminology, “vapor barrier” and “...

April 19, 2016

Stability of Buried Corrugated Metal Pipe

Graham Cranston presented Tuesday 12 April at the 2016 Annual Stability Conference hosted by the Structural Stability Research Council. His presentation title and abstract are below.

Title: Stability of Buried Corrugated Metal Pipe...

April 15, 2016

Connecting Past and Present

A trestle that once carried iron ore through a busy Bethlehem Steel plant in eastern Pennsylvania now serves as a pathway for visitors to the reinvented SteelStacks venue. Founded in 1857 in Bethlehem, Pennsylvania, and shuttered in 2003,...

April 12, 2016

Innovating with Materials

Mankind has innovated with design and construction methods and materials since Homo Habilis laid one flat stone horizontally...

April 12, 2016

Computational Design

Computational design helps architects, owners, and contractors assess coinciding parameters, such as geometry, logic, and...

March 16, 2016

What Structural Engineers Need to Know About Rain Loads

On 15 February 2016, Aaron Lewis and Sean Homem presented at the Geotechnical and Structures Congress in Phoenix, Arizona. The event was hosted by the Geo-Institute (G-I) and Structural Engineering Institute (SEI) of the American Society of Civil...