October 3, 2016

Continuous Transverse Reinforcement — Behavior and Design Implications

Recent advancements in automatic reinforcing bar bending machines allow fabrication of continuous transverse reinforcement (CTR) with 90-degree transverse bends. The resulting closed, continuous reinforcement increases the speed by...

September 20, 2016

Decoding the Code: 2016 New York City Energy Conservation Code

field testingOn 3 October 2016, the updated New York City Energy Conservation Code (NYCECC) will go...

September 9, 2016

Evolution of ACI 562 Code – Part 7

The September 2016 issue of Concrete International Magazine includes an article by Jared Brewe (Senior Staff I, CHI SE), Gustavo Tumialan (Senior Project Manager, BOS SE), and Paul Kelley (Senior Principal, BOS SE). The article, “Evolution...

August 9, 2016

Silicon Valley Mid-Summer Emergency: Santa Clara Addresses the Peak-Demand Repair of a 96-inch Pipeline

By: Rasko Ojdrovic, Peter Nardini, Anna Pridmore

This paper presents Santa Clara Valley Water District's (SCVWD) approach to addressing their first high profile water main failure including their application of failure investigation, emergency condition assessment, pipe...

August 9, 2016

Rerounding of Deflected Buried Pipe Subjected to Internal Pressure

This paper presents a theoretical basis for the rerounding effect of internal pressure on deflection and stresses in buried pipe. The nonlinear differential equations governing pipe-soil interaction of deflected buried flexible or semi-rigid pipe...

August 9, 2016

From Reactive to Proactive: A Pipeline Owner's Change in Philosophy

By: Rasko Ojdrovic, Anna Pridmore

Pipeline systems in power plants have a unique set of factors quite different from pipeline systems in municipalities. Typical municipalities have hundreds of miles of pipelines and focus on the inspection of this underground...

August 9, 2016

Forensic Analysis of a Large-Diameter Knife Gate Valve Performance

By: Rasko Ojdrovic, Christopher Trautner

Knife gate valves (KGVs) are frequently used in pipeline systems as on-off valves and to enable isolation and servicing of other system components. This type of valve operates by lowering a steel plate between two seal rings that are...

August 8, 2016

Evaluation of Unintended Live Load Effects on Buried Pipelines

Buried pipelines may be subjected to external live load effects not considered in the initial design during normal operation or during nearby construction activities. External live loads may be in the form of truck loads,...

August 8, 2016

Design of Concrete Pressure Pipelines for Thrust Restraint Using AWWA Manual M9

This paper details the procedure for pressure-induced thrust restraint design of concrete pressure pipelines with tied joints at elbows, tees, and end-caps through several examples following the current AWWA Manual of Practice M9. The paper...

August 5, 2016

Construction Dewatering: Understanding its effect on below-grade waterproofing

By: Daniel Gibbons, Payal Vora

Construction site dewatering is used to locally control and lower groundwater levels in the vicinity of the excavation. This is typically done to maintain soil conditions needed during, and occasionally after, construction—for example, to...