David E. Duck, Phd, Pe Email & Phone Number

San Diego, Ca, Us

San Diego, Ca, Us

Minneapolis, Minnesota, Us

Part of the Sports and Entertainment division.

Phoenix, Az, Us

Project manager for the structures and site scopes of the UCSD Theater District Living and Learning Neighborhood, a 10.9-acre site, 1,500,000sf. development consisting of 5-buildings (9- to 21-stories) and a 4-story underground parking structure, with three of the buildings atop the underground parking structure. Project is mixed-use consisting of housing, academic, conference, and retail spaces.

▪ Responsible for project financials, including review/approval of subcontractor invoices and change orders, creation of monthly payment applications, budget review and forecasting, and cost reporting for multiple self-performing trades such as wood/metal framing, concrete, plumbing, electrical, drywall, painting, and finishes. ▪ In charge of OAC meetings, creation and updating of project schedules, RFI/submittal review and management, and other project-specific deliverables ▪ Review and prepare estimates, negotiate and prepare contracts to ensure complete scopes of work, and buyout projects ▪ Take part in pre-construction meetings for new projects to coordinate with clients, design team, and subcontractors ▪ Oversee quality control and compliance, manage punch-list, and close out projects

Led a research project sponsored by CALTRANS to examine the potential use of large diameter reinforcing bars (#14 and #18) and their mechanical couplers in bridges in the State of California. CALTRANS has expressed interest in increasing the use of large diameter bars in the construction of bridge columns as one of many incentives to accelerate bridge construction in the State. When using precast concrete construction or construction techniques aimed at accelerating the construction process, the mechanical splicing of these large diameter bars could be advantageous in some particular cases. However, the lack of knowledge about their cyclic load response, and in particular, of the fatigue life of the bars and of the various mechanical splices available has hampered the wider use of these large-diameter bars. The use of high-strength steel was also investigated.Given the large forces required to cyclically test these bars (both Grade 60 and 80) a project-specific loading frame was designed. A unique aspect of the loading frame is the use of a sulfur-based mix in order to grip and develop the bars. An in-situ heating system was designed to melt the sulfur mix in order to replace the tested specimens with new specimens.

Performed the complete structural design of a 6-story 25,000sf commercial building in downtown Oakland, CA ▪ Gravity system was a combination of reinforced concrete two-way slabs and frames with lateral resistance provided by reinforced concrete shear-walls. Foundation consisted of a reinforced concrete mat with grade beams. ▪ Worked directly for the building’s owner from the design phase up to the construction of the building

La Jolla, Ca, Us

Assisted Prof. Jose Restrepo in his SE 151A - Design of Reinforced Concrete class. Topics covered included concrete and reinforcement properties, service and ultimate limit state analysis and design, and design/detailing of structural components.

Assisted in the construction administration and testing of the Network for Earthquake Engineering Simulation (NEES) sponsored research project whose main objective was to advance knowledge toward the development of innovative floor anchorage systems that reduce inertial forces during earthquakes and maintain a centered floor afterward. The project explored the dynamic behavior of building structures with inertial force-limiting floor anchorage systems to determine the appropriate design parameters to produce optimal seismic performance for a variety of building geometries and properties. The benefits of such a system include: (1) reduced seismic forces; (2) reduced structural lateral drift; (3) reduced structural damage; (4) reduced nonstructural and contents damage; and (5) a higher factor of safety against collapse.

La Jolla, Ca, Us

Led a research project to seismically retrofit an existing 1960's building in the Los Angeles area through the use of Fiber-Reinforced Polymer (FRP). The proposed retrofit was reproduced and tested in a full-scale replica of the building's concrete moment frame system at the UC San Diego Powell Lab. One of the main objectives of the test program was to confirm the strengthening of the specimen in order to modify the failure mechanism of the frame columns from either shear-controlled or lap splice failure, to flexurally-controlled. For this reason and provided that the expected demands on the structure were well beyond the design levels of the time, another goal of the test program was to determine the actual failure mode of the specimen and confirm an adequate load path, given the eccentric frame connection. Furthermore, taking into account access constraints and in order to minimize impacts to occupancy during the actual retrofit, the FRP wrap was limited to the exterior face of the building while the interior face was left unwrapped. This represented a challenge on its own and dictated the final design of the retrofit. For this reason, confirmation of the adequate anchorage of the FRP was a critical aspect of the research efforts. Ultimately, the results from the strengthened specimen would serve as a proof test to provide hysteresis loops to be utilized in the analysis and design of the global building.

This investigation obtained, and will interpret and disseminate the first shake table results for full-scale bridge columns detailed consistent with current Caltrans design practice. Under the auspices of the Pacific Earthquake Engineering Research Center (PEER), the Federal Highway Administration (FHWA), the Department of Transportation of California (Caltrans) and the Network for Earthquake Engineering Simulation (NEES) program; and industry sponsorships from Skanska and the Concrete and Reinforcing Steel Institute (CRSI), this research project tested a 1.2 m diameter bridge column with a mass of 250 ton placed atop, in order to mobilize inertial forces.The column was densely instrumented to obtain high quality data and tested under various earthquake ground motions, including motions of severe intensity demanding large inelastic response. Results of the test program will be compared with results of recent shake table testing of full-scale bridge columns performed in Japan at the E-Defense test facility and with shake table results from reduced-scale tests to be carry out at the University of California at Berkeley.Combined with analytical simulations, the results will also provide a critically needed assessment of the adequacy of reduced-scale models and tests conducted at altered strain states. These will deliver the missing data required to increase the confidence in the current analysis methods and validate (or improve) present design practices.

Seattle, Washington, Us

• Part of a design and construction administration team, working mainly with hospitals (OSHPD) projects in the State of California. • In charge of reviewing contract documents such as plans, shop drawings, deferred approvals and welding procedures• Participated in the field inspection of projects to ensure their compliance with plans and other construction documents• Designed the seismic anchorage of medical, electrical, and plumbing equipment to satisfy all applicable codes• Assisted in the creation of change orders, instruction bulletins and answering RFI’s• Performed and reviewed construction cost estimates

Doctor Of Philosophy (Ph.D.), Structural Engineering

M.S., Structural Engineering

B.S., Strucutral Engineering

Minor, Photography