Knowledge Sharing

August 3, 2016

Discovery to Solution Implementation: NTMWD Addresses Degraded Piping under a Major Highway

By: Rasko Ojdrovic, Murat Engindeniz, Steven Long, Travis Markham, Mike Larson, Anna Pridmore

The North Texas Municipal Water District (NTMWD) is a water conservation and reclamation district created by an act of the Texas Legislature in 1951. Today NTMWD’s Regional Water System provides drinking water to over 1.6...

August 3, 2016

Evolution of the CFRP Repair of Pipelines—The Road to a Well-Established Technology

As with any technology, internal repair of pipelines using carbon fiber reinforced polymer (CFRP) composites has evolved since its first use in the United States in late 1990s, and the current state of the art in design, installation...

June 29, 2016

Structural Engineering Licensure: Critical to Our Future

By: Glenn Bell, Andrew W. Herrmann

The June 2016 issue of Structure Magazine includes an editorial by Glenn Bell and Andrew W. Herrmann, President-Elect of the Structural Engineering Institute. The article, “Structural Engineering Licensure: Critical to Our...

June 29, 2016

Shear Resistance of Paving and Waterproofing Systems

By: Gregory Doelp, Philip Moser, Joseph Haydu, Bridge Preservation LLC

Waterproofing systems installed on bridge decks, elevated parking decks, and similar structures often have paving systems over them to protect the waterproofing and to provide a surface suitable for vehicular traffic. Vehicular loads are...

June 3, 2016

PIANC Guidelines: Oil and Petrochemical Terminal Design

By: Martin Eskijian, Ron Heffron, William Asante, Gayle Johnson, Jerko Kocijan

This new PIANC reference will provide a set of recommendations to the global community involved in the initial design, analysis, or upgrade of marine oil and petroleum terminals. Potential users include owners/operators, port...

June 3, 2016

Effect of Moored Vessels on Seismic Response of Structures

By: Rod Iwashita, Julie Galbraith, Marc Percher, Gayle Johnson

In current design practice any vessel at berth during an earthquake event is ignored. This is rationalized based on the frequency of vessel calls in combination with the infrequency of significant earthquakes and the long response...

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