January 19, 2017

Low-Cycle Fatigue Performance of High-Strength Steel Reinforcing Bars

By: Chase Slavin, Wassim M. Ghannoum

New high-strength reinforcing steel bars (HSRB) are under development in the United States, driven by constructibility and economic and environmental incentives. An experimental study was undertaken to compare the low-cycle fatigue behavior of...

January 18, 2017

Mooring Line Systems for Tanker Vessels – Current Standards in Analysis and Design Compared to Real Life Data

Design and analysis of moorings of tanker vessels have traditionally been approached from two sides: from the vessel side, regulated by classification societies and with proposed guidelines from OCIMF, and from the land side, regulated by local codes and standards.
December 14, 2016

Smoke Control: Getting it Right

The December 2016 issue of Construction Specifier features “Smoke Control: Getting it Right,” an article by Brian Kuhn. In the article, Brian explores the design and implementation of smoke control systems and the importance of...

December 14, 2016

Parametric Study on Effects of Pile Orientation in Integral Abutment Bridges

By: Brooke Quinn, Scott A. Civjan

For integral abutment bridge (IAB) design, there is no consensus on the preferable orientation of the piles supporting the abutment, although variations can affect overall bridge behavior and forces in the piles. This paper details a parametric...

December 12, 2016

Development and Evaluation of Seismic Retrofit Alternatives for Older Concentrically Braced Frames

By: Molly Johnson, Andrew D. Sen, Marsha A. Swatosh, Ryan Ballard, Daniel Sloat, Charles W. Roeder, Dawn E. Lehman, Jeffrey W. Berman
Concentrically braced frames (CBFs) have been used for seismic-lateral-force resisting systems for many years, but prior to approximately 1988, they were not designed to promote ductile response using capacity-based design.
December 12, 2016

Evolution of ACI 562 Code – Part 10

By: Gustavo Tumialan, Nestore Galati, Antonio Nanni

The December 2016 issue of Concrete International magazine includes an article co-authored by Gustavo Tumialan with Nestore Galati of Structural Technologies and Antonio Nanni of the University of Miami. The article, “...

November 23, 2016

A Collaborative Approach to Restoring MIT Main Group and Building 10 Dome

By: Emily Hopps, Carl Jay, Shawmut Design and Construction, Benjamin Markham, Acentech Inc., Gary Tondorf-Dick, Massachusetts Institute of Technology

Since 1916, the Great Dome has been the symbol of the MIT campus. In 1942, MIT covered the oculus skylight in the Dome, resulting in the Barker Library Reading Room being solely lit by electric lights and an overall dim lighting level. MIT...

November 23, 2016

From the Horror Files: Lessons Learned from Envelope Failures

This presentation will illustrate lessons learned from 20 years of investigating envelope failures of various building types across the United States. The presenter will use several case studies to show the causes and effects of building envelope...

November 23, 2016

Building Enclosure Compliance Testing - The How and Why

What are the risks in the enclosure design and how can an owner and designer verify performance and compliance, especially for critical design elements? How do owners and designers know they have the correct materials, a functioning assembly, and...