Biagiotti S.K.,Kleinfelder , Inc. |
Biagiotti S.F.,Structural Integrity Associates
NACE - International Corrosion Conference Series | Year: 2016
This paper will contrast the way engineers were introduced into corrosion engineering careers 25 years ago versus today. During the development of this paper, it was determined that young engineers today are less exposed to formal, internal multi-year training programs than the previous generation of engineers. Instead, today's young engineers are being taught through the application of technical standards, completing certification training, and leveraging mentoring opportunities available either internally within their organizations or through outside organizations such as NACE International(1). This paper analyses these differences, reviews the burgeoning collection of universities and colleges offering specific curricula in corrosion engineering and pipeline integrity management, and discusses the benefits of mentoring. It is hoped that these reflections on career development can be leveraged to develop strategies for keeping today's young professionals in this field throughout their careers. © 2016 by NACE International.
Woodward N.R.,Kleinfelder , Inc. |
Tinjum J.M.,University of Wisconsin - Madison |
Wu R.,University of Wisconsin - Madison
Geotechnical Testing Journal | Year: 2013
This study investigated water redistribution during measurement of the thermal dry-out curve (i.e., soil thermal resistivity QT versus volumetric water content h). Although there is not a standard method for measuring the QT-h relationship, curves are typically generated with incremental QT measurements as a specimen is dried. However, drying within a specimen may not be uniform, even in a controlled, lowtemperature drying environment. In this study, QT and h were measured at the top, middle, and bottom of remolded cylindrical soil specimens of a range of soil types after staged drying in a low-temperature oven. Water distribution was highly varied; for example, tests on silty sand revealed h values up to nine times greater at the bottom than at the top of the specimen, and spatial variations in h erroneously affect measured values of QT. Numerical models validated water migration within soil specimens during staged drying. The results indicate a need for modification of the standard thermal resistivity testing procedure to account for variations in water content across a specimen and along the sensor length during drying. Copyright © 2013 by ASTM International.
Johnson N.S.,Kleinfelder , Inc. |
Creveling M.L.,Kleinfelder , Inc. |
Gazaway K.J.,Kleinfelder , Inc.
Earthquake Spectra | Year: 2015
The historic North Torrey Pines Road Bridge in Del Mar, California, is a 15-span precast concrete tee-girder structure built in 1933. The bridge has been classified as structurally and seismically deficient and functionally obsolete, with a sufficiency rating of 19 out of 100. Through the Caltrans Retrofit and FHWA Rehabilitation Program, the structure was to be rehabilitated or replaced for improved sufficiency and to satisfy seismic life safety. The combination of complex site geology, its deteriorated state, structural irregularities, site constraints, and the requirement to preserve its historic designation presented a challenging task. The solution was a performance-based methodology, more complex than typically applied in California, which led to a unique multifaceted retrofit and rehabilitation approach. Design and analysis included detailed inelastic static analysis, secant spectral methods, and nonlinear time-history analysis with multi-support excitation. The resulting solution included ground remediation, substructure strengthening, stiffness decoupling, a replacement superstructure, and new abutments on deep foundations. © 2015, Earthquake Engineering Research Institute.
Siegel B.,Kleinfelder , Inc.
ENR (Engineering News-Record) | Year: 2013
William C. Siegel, the president and CEO of The Kleinfelder Group Inc., San Diego, feels that there is a need for the US government to increase the gas tax. He provides three reasons for the taxes to be increased. First, there is the rough condition of many roads. Second, the current gas tax is not sufficient to fund even the minimal levels of transportation infrastructure currently planned. Finally, a gas tax is, in effect, a user fee, and it only makes sense that users pay for the use of the infrastructure. The current gas-tax format, in which the tax is charged per gallon, is far from perfect, but it's acceptable. But the author would argue that if the gas tax is raised, the government must index it to inflation. Even if Congress passes an increased gas tax in one form or another, the government can't stop working on long-term funding solutions, including alternative ways to collect appropriate user fees.
Allen K.,Kleinfelder , Inc.
Hydrocarbon Processing | Year: 2014
It is not unusual for some hydrocarbon processors to make environmental compliance activities a lower priority than daily operational needs, such as plant maintenance, product flow and product transport. After all, compliance does not directly generate profit. Although not all owners/operators intentionally ignore environmental compliance, this mode of operating has been seen in the industry throughout the years—until now. © 2014 Hydrocarbon Processing.
Finegan J.M.,Kleinfelder , Inc.
28th Symposium on the Application of Geophysics to Engineering and Environmental Problems 2015, SAGEEP 2015 | Year: 2015
At a site undergoing environmental investigation and remediation for petroleum-hydrocarbon impacts, groundwater is monitored in two zones beneath the site, a shallow, discontinuous perched zone and a deeper zone corresponding to a regional aquifer. Nuclear magnetic resonance (NMR) was used to evaluate a potential source of water contributing to a localized increase in groundwater elevation in a single shallow zone monitoring well (other shallow wells generally exhibited decreases). NMR was used, because it can provide a direct measurement of the presence of water in the pore space of geological materials by detection of the nuclear magnetization of the hydrogen nuclei (protons) in the water. NMR measures parameters such as total water content in the saturated zone (or moisture content in the vadose zone), bulk porosity and information about the pore-scale environment, and quantification of 'bound' versus mobile water volume.
Liao J.,Kleinfelder , Inc. |
Sargand S.,Ohio University
Road Materials and Pavement Design | Year: 2010
Traditionally, Hot-Mix-Asphalt (HMA) materials in mechanistic analyses for flexible pavements have been treated as pure elastic solids. The research presented herein consists of developing a three-dimensional linear viscoelastic finite element model to simulate the behavior of a perpetual pavement structure subjected to traffic loading at different temperatures and vehicular speeds. The developed model relatively accurately predicted not only the stress and strain responses but also the deflection response concurrently. The results of this research will encourage the pavement community to use viscoelastic analysis of perpetual pavements in practice, which otherwise are extensively being analyzed with the conventional elastic models. © 2010 Lavoisier, Paris.
Liao Y.,Kleinfelder , Inc. |
Meneses J.,Kleinfelder , Inc.
Bulletin of Earthquake Engineering | Year: 2013
A total of 144 free-field ground motions with closest site-to-rupture distances (Rrup) less than 200 km recorded during the 2010 Mw 7. 2 El Mayor-Cucapah earthquake are used to investigate predictive capabilities of the next generation attenuation (NGA) ground-motion prediction equations (GMPE). The NGA GMPEs underpredict observed spectral accelerations at sites with shear wave velocity in the upper 30 m of the site (Vs30) between 180 and 366 m/s with Rrup from about 10 to 50 km and overpredict at sites with Rrup from about 50 to 200 km. Intra-event residuals of the NGA GMPEs exhibit a noticeable negative trend for peak ground acceleration and 0.3, 1. 0, and 2. 0 s periods. Comparison of the inter-event residual between the 2010 Mw 7. 2 El Mayor-Cucapah earthquake and the NGA dataset reveals that short-period inter-event residuals from the 2010 Mw 7. 2 El Mayor-Cucapah earthquake is within the scatter of inter-event residuals from the NGA dataset but long-period inter-event residuals do not appear within of the scatter of inter-event residuals from the NGA dataset. Spectral accelerations predicted by the NGA GMPEs are generally unbiased against Vs30 and periods of less than 4. 0 s. Observed spectral accelerations show a stronger Vs30 dependence for both short and long periods compared with the NGA GMPEs. The Boore and Atkinson (Earthq Spectra 24(1):99-138, 2008) and Chiou and Youngs (Earthq Spectra 24(1):173-215, 2008) GMPEs perform better in predicting observed short-period spectral accelerations at the sites with Vs30 between 180 and 250 m/s than the Abrahamson and Silva (Earthq Spectra 24(1):67-97, 2008) and Campbell and Bozorgnia (Earthq Spectra 24(1):139-171, 2008) GMPEs. © 2012 Springer Science+Business Media B.V.
Lafrenz E.,Kleinfelder , Inc.
Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA | Year: 2015
In June 2010, the U.S. EPA issued the Tailoring Rule1 for greenhouse gas emissions. Although this regulation was created to shield smaller emission sources from major source requirements, it has created permitting challenges for many oil and gas facilities. Under the Tailoring Rule, oil and gas facilities have been challenged to remain under major source thresholds. The Reno LNG plant decided to construct a one-train LNG plant, instead of two trains to remain under the major source thresholds. The Sterling Energy facility decided to remain under PSD modeling thresholds by constructing a smaller facility with more electric driven engines. The permitting strategy for a LNG facility in Reno, NE, is presented and examined how this regulation had altered the plans for production capacity design at a gas plant to be located in Colorado or Nebraska. This is an abstract of a paper presented at the 108th AWMA Annual Conference and Exhibition (Raleigh, NC 6/22-25/2015).
News Article | December 8, 2016
SAN DIEGO--(BUSINESS WIRE)--Kleinfelder is pleased to be honored with an Engineering Excellence Award from ACEC California for work completed on the Cross Border Xpress (CBX) Terminal Building and Pedestrian Skybridge connecting San Diego and Tijuana. The binational project spans the U.S./Mexico border and directly connects a new terminal building in San Diego to the Tijuana International Airport (TIJ), making TIJ the only airport in the world with terminals in two countries. CBX is a high-profile, high-security project toll crossing for ticketed airline passengers offering a direct, convenient connection for TIJ passengers traveling to or from southern California. The bridge allows passengers flying into or out of Tijuana International Airport to circulate across the international border between two terminal buildings, enabling them to avoid unpredictable border wait times and often- lengthy delays at congested land ports of entry at San Ysidro or Otay Mesa. The airport can handle up to 10 million passengers per year and 360 flights per day. “This extraordinary project is one of a kind and we are honored to be recognized by ACEC California,” said Dan Harpstead, Chief Technical Officer at Kleinfelder, the San Diego-based engineering firm that designed the bridge and oversaw its development. “The project has been extremely beneficial to travelers since it opened during the 2015 holiday season, and more than 600,000 passengers have already used it.” The project’s owner, Otay-Tijuana Venture, LLC, placed considerable importance on creating a cost- effective structure that emphasized aesthetics and functionality. The $120 million project required tight collaboration with multiple stakeholders, including bi-national and bilingual coordination between the design team and contractors on both sides of the border. Moreover, engineering a building within a bridge structure across international lines required that engineers design the project to satisfy both building and bridge specifications. Additional features such as moving walkways, lights, mechanical systems, fire life safety, and HVAC added complexity to the structure. Kleinfelder’s bridge design consisted of a pair of steel through-trusses with three simply-supported spans ranging from approximately 115 to 150 feet. In addition to ensuring the integrity of the crossing, this was the optimal solution to accommodate limited site-accessibility and maintain the Tijuana terminal operations during construction. The bridge is supported on four reinforced concrete pier walls and cast- in-drilled-hole concrete piles, all designed to fit aesthetically in the structure’s overall look and feel. Kleinfelder was instrumental to the successful completion of this complex bridge project, which blends engineering and construction excellence with bi-national collaboration. Kleinfelder’s integrated bridge and geotechnical expertise proved critical for moving the project swiftly from its initial phase of development through completion. Not only was the project completed on-time and on-budget, but it also meets the structural and aesthetic requirements of stakeholders and agencies in both the U.S. and Mexico. Additional information about the Cross Border Xpress Terminal Building and Pedestrian Skybridge can be found at http://www.kleinfelder.com/index.cfm/services/design-engineering/bridge-engineering/san-diego-tijuana-cross-border-xpress-cbx/. About Kleinfelder Kleinfelder is a leading engineering, construction management, design and environmental professional services firm, providing solutions to meet our world's most complex infrastructure challenges. Leveraging our integrated, cross-disciplinary team of nearly 2,000 professionals in 70 offices across the U.S., Canada, and Australia, we partner with private and public sector clients to deliver leading-edge solutions on a variety of large-scale projects. Our reputation for expertise, innovation, and quality, earned since Kleinfelder’s inception in 1961, has solidified our position as a trusted consultant and industry leader.