Knowledge Sharing

April 10, 2018

Experimental Evaluation of a Procedure for SMF Continuity Plate and Design

By: Adel Mashayekh, Chia-Ming Uang

The AISC Seismic Provisions require that continuity plates in a special moment frame (SMF) welded moment connection be connected to the column flanges by complete-joint-penetration groove welds. Tran et al. (2013) have proposed a design procedure...

April 4, 2018

Experimental Evaluation of a Procedure for SMF Continuity Plate and Weld Design

By: Adel Mashayekh, Chia-Ming Uang
The AISC Seismic Provisions require that continuity plates in a special moment frame (SMF) welded moment connection be connected to the column flanges by complete-joint-penetration groove welds. Tran et al. (2013) have proposed a design procedure that allows the designer to evaluate the required forces in the continuity plates such that more economical welds (e.g., fillet welds) can be used; the required thickness of the continuity plates also need not be the same as that prescribed in the AISC Seismic Provisions.
March 30, 2018

Digital Design, Coordination and Delivery

Methods for digital design, coordination, and delivery are prevalent in the building design and construction industry. As tools and knowledge evolve, new software applications present themselves on a broad range of projects. Modeling software is especially relevant to structural designers, who can use the software to optimize material quantities, improve coordination, and streamline execution for project with complex geometry.
March 27, 2018

To Repair or Replace: Structural Assessment of Damage at the Steeplechase Pier

By: Kirk Stauffer, Steven Hall, Kevin Poulin
Steeplechase Pier, located in Coney Island, Brooklyn, was damaged by Hurricane Sandy in late 2012. During reconstruction of the pier in 2013, the mooring “spud” of a construction barge failed and the barge rammed into the pier, seriously damaging it. Their article outlines the response to investigate this damage and develop repairs, details the challenges of completing an investigation that determined the condition of the piles, and discusses how the aggressive schedule to reopen the pier ultimately determined the chosen repair scheme.
March 23, 2018

Waterproofing and Integration of Exposed Air Handling Unit (AHU) Cladding with the Building Envelope

By: Daniel Gibbons, David Markman

Large rooftop mechanical equipment, such as air handling units (AHU), can be an important component of a building’s exterior envelope. However, it is critical that the skin of this equipment be designed or constructed with principles...

March 23, 2018

Narrow Roof Design Challenges

By: Jay Sekel, Jeffrey Kerr

Narrow roofs and other façade articulations are often designed and detailed with waterproofing characteristics similar to adjacent vertical wall surfaces, leaving the narrow roof assembly with insufficient waterproofing performance and risk of...

March 2, 2018

Facade Inspection and Maintenance

A well-designed, constructed, and maintained building facade protects the building interior from water leakage, air infiltration, and energy loss. However, environmental exposure and time can degrade facade components. Facade deterioration can lead to a range of issues from compromised performance to potential falling hazards.
February 9, 2018

Admixture Compatibility in Metakaolin–Portland-Limestone Cement Blends

By: Behnaz Zaribaf, Kimberly E. Kurtis

Despite potential benefits including enhanced mechanical properties, reduced permeability, and decreased environmental impact, higher rates of metakaolin substitution for cement ([10% MK by mass of cement) have been limited practically because of...

January 9, 2018

Developments in Structural Fire Protection Design – a US Perspective

The next edition of the ASCE/SEI 7 standard commences a new and groundbreaking industry-consensus standard of care for structural fire protection in the USA, and other adopting jurisdictions. The default option is termed standard fire resistance...

January 8, 2018

Architect's Guide to Structures: Special Structural Topics

To help architects manage growing complexities and partner with project teams, a recent series of practical guidebooks look to outline structural engineering principles in a practical and comprehensive way. Issued by academic publisher Routledge...

Pages