January 14, 2021

High-Strength Steel Bars in Earthquake-Resistant Reinforced Concrete T-Shaped Walls

By: Mohammad Sajedul Huq, Erick A. Burgos, Remy D. Lequesne, Andres Lepage

Six large-scale reinforced concrete T-shaped slender walls were tested under reversed cyclic loading to study the effects of reinforcing bar mechanical properties on wall deformation capacity. Effects on lateral stiffness and hysteretic...

December 29, 2020

Diagonally Reinforced Concrete Coupling Beams with Grade 120 (830) High-Strength Steel Bars

By: Shahedreen Ameen, Remy Lequesne, Andres Lepage

Four large-scale coupling beams were tested under fully reversed cyclic loads to investigate the effects on behavior of diagonal bar grade (60 or 120 [420 or 830]), beam shear stress (9.5 or 14√fc′, psi [0.79 or 1.17√fc′,...

Keywords:Metal-Steel
November 24, 2020

Diagonally Reinforced Concrete Coupling Beams with Grade 120 (830) High-Strength Steel Bars

By: Shahedreen Ameen, Remy D. Lequesne, Andres Lepage

Four large-scale coupling beams were tested under fully reversed cyclic loads to investigate the effects on behavior of diagonal bar grade (60 or 120 [420 or 830]), beam shear stress (9.5 or 14√fc′, psi [0.79 or 1.17√fc′,...

November 10, 2020

CFRP Pipe Repair: How To Ensure Success

CFRP pipe lining has proven to be a valuable piping repair technology. Compared to conventional excavation-type repairs, it requires less excavation and disruption to above-ground operations, as well as shorter time out of service. However,...

October 22, 2020

Performance of CFS Walls Braced with Bridging and Sheathing

The objective of this paper is to describe testing and analysis of cold-formed steel (CFS) stud walls braced by both discrete steel bridging and gypsum sheathing. A focused series of tests was conducted to determine the strength of a typical CFS...

October 20, 2020

Cyclic Performance of Steel Sheet Connections for CFS framed Steel Sheet Sheathed Shear Walls

By: Benjamin Schafer, Shahabeddin Torabian, Z. Zhang, A. Singh, F. Derveni, K.D. Peterman, T.C. Hutchinson

The main objective of this research is to study fastener-level force-deformation response appropriate for standard cold-formed steel (CFS) framed steel sheet sheathed shear walls under cyclic loads. Recently completed CFS-framed shear wall tests...

September 15, 2020

Semi-rigid floor-to-wall connections using side-framed lightweight steel structures: Concept development

By: Shahabeddin Torabian, Alireza Bagheri Sabbagh

This paper presents the development of side-framed lightweight steel (SFLS) structures featuring semi-rigid floor-to-wall connections. Initially, the effect of variation of connection rotational stiffness on the design of a two-story frame is...

September 2, 2020

Sub-Slab Drainage Systems

Many buildings have enclosed below-grade spaces, which can either be exposed to permanent, temporary, or perched groundwater conditions.  Typically, these groundwater elevations fluctuate several feet, if not more, due to precipitation or...

August 18, 2020

CIPP for Tomorrow: What Is Needed?

By: Murat Engindeniz, Michael Gipsov

Washington Suburban Sanitary Commission (WSSC Water), one of the largest users of carbon fiber reinforced polymer (CFRP) liners for large diameter pressure pipe, is considering expanding its use of FRP liners to include small diameter pressure...

August 18, 2020

Uncertainty Quantification of the Structural Capacity of Pipelines Using Separation of Variables Methodology

Evaluation of pipeline infrastructure system resilience requires an understanding of pipeline risk of failure. Current methods for pipeline risk assessment are largely deterministic, and as such, do not explicitly represent the effect of...

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