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Seminar Detail

Program Information Registration
Practical Deep Foundation Design and Construction for Seismic and Lateral Loads Short Course
Renaissance Hollywood Hotel & Spa
Hollywood, CA
October 12, 2010

This one-day event will present state-of-the-practice in analysis, design, construction and testing of deep foundations subject to seismic and lateral loads.

Attendees are invited to bring a poster that communicates what you and your firm are doing that explains how you are designing and constructing for seismic conditions. Posters will be displayed in the break/lunch area for viewing by all. Space is limited so reserve your poster space early.
Seminar Program

Preliminary Program (Tuesday, October 12, 2010)
8:00 AM-8:30 AM Registration and Continental Breakfast
8:30 AM-8:40 AM Opening Remarks
Zia Zafir, Ph.D., P.E., G.E., Kleinfelder
8:40 AM-9:30 AM Deep Foundation Design for Seismic and Lateral Loads – An Overview
Zia Zafir, Ph.D., P.E., G.E., Kleinfelder
The design of the deep foundations for seismic and lateral loads should consider both inertial and kinematic loads. Kinematic loads include loads due to ground shaking as well as resulting from seismic hazards such as liquefaction and lateral spreading. This presentation will provide an overview of different kinds of inertial and kinematic loads and approaches to incorporate them in the analyses.
9:30 AM-10:15 PM Performance Based Design and Analysis of Pile Foundations in Liquefied Ground
Ignatius (Po) Lam, Earth Mechanics Inc.
Design analysis for piles in liquefaction induced lateral spread problem involving soil-pile interaction is one of the most important engineering problems facing earthquake engineers, particularly those involved in the seismic design of bridges and port structures. Mr. Lam will present some example projects and comment on experience learnt from them on the performance of pile foundations in such design situations.
10:15 AM-10:30 AM Break/Poster Viewing
10:30 AM-11:15 PM Seismic Analysis and Design of Drilled Shafts Subjected To Liquefaction Induced Lateral Spread and Downdrag
Endi Zhai, Ph.D., P.E., G.E., Keinfelder
Drilled shaft foundations were selected against a tunnel option to support a heavy intake pipeline structure along a channel bank underlain by liquefiable soils in City of Long Beach, California. The design adopted a nonlinear time-history effect-stress soil-pile interaction analysis. Lateral displacement and settlement-induced downdrag force due to liquefaction shaking were evaluated, and the shaft forces and curvatures during shaking and after shaking were provided for structural design. Gamma-gamma testing were used during wet-method shaft installation.
11:15 AM-12:00 PM Analysis of Laterally Loaded Drilled Shafts and Piles using LPILE including LRFD Considerations
Shin-Tower Wang, Ph.D., P.E., Ensoft Inc.
Computer program LPILE has been widely accepted in the industry for analyses of piles and drilled shafts based on nonlinear p-y curves. A feature that distinguishes LPILE is that the original development came after sophisticated tests of instrumented piles under lateral loading installed into a variety of soils and subjected to loadings that were designed to yield data of a comprehensive nature. In this presentation we will discuss why the p-y curve method is so useful and practical to engineers, and why it is important to consider the effect of nonlinear flexural rigidity (EI) of drilled shafts under lateral loads. This presentation will also discuss the application of LRFD in LPILE analyses.
12:00 PM-1:00 PM Lunch/Poster Viewing
1:00 PM-1:45 PM Analysis of Laterally and Axially Loaded Group of Shafts and Piles using DFSAP
Jogeshwar P. Singh, Ph.D., P.E., G.E., J.P. Singh & Associates
1:45 PM-2:30 PM Caltrans Guidelines for Estimation of Bridge Foundation Loads Due to Liquefaction Induced Lateral Spreading
Tom Shantz, Caltrans
Caltrans has been working closely with Pacific Earthquake Engineering Research Center (PEER) researchers in the development of a design guideline for the estimation of loads on bridge foundations and abutments resulting from liquefaction induced spreading ground. The recommended procedures are based on an equivalent nonlinear static analysis methodology. While this approach does not attempt the analytical rigor of a nonlinear dynamic analysis, it was developed through careful evaluation of a modest body of research performed in the centrifuge, small scale shake table, large scale shake table, and full size field tests. This presentation will provide an overview of the recently adopted guideline.
2:30 PM-2:45 PM Break/Poster Viewing
2:45 PM-3:30 PM Design and Construction of Laterally-Loaded Foundations for Electric Transmission Lines
Peter Kandaris, Salt River Project
The Salt River Project designed and constructed two 40-mile long high-voltage electric transmission lines in Central Arizona in 2009-10. Approximately 300 single shaft steel poles supported by reinforced concrete drilled shaft foundations were designed for this project using an updated version of Electric Power Research Institute software, MFAD. This presentation will focus on reliability-based design methods (incorporated within the new software version) used in laterally loaded foundation design. Challenges encountered during and techniques used for construction of large diameter, deep river crossing foundations on the transmission lines will also be shown.
3:30 PM-4:00 PM Load Testing of Pile Groups  
Jon Stewart, UCLA
A 3x3 bored pile group consisting of nine cast-in-drilled-hole reinforced concrete shafts and a comparable single-shaft were subjected to reversed cyclic, lateral head loading to investigate group interaction effects across a wide range of lateral displacements. The piles had the same diameter of d=0.61 m and similar soil conditions; however, various equipment constraints led to two differences: (1) a fixed head (zero rotation) boundary condition for the single pile versus minor pile cap rotation in the vertical plane for the group and (2) shaft longitudinal reinforcement ratios of 1.8% for the single pile and 1% for the group piles. To enable comparisons between the test results, a calibrated model of the single pile (1.8% reinforcement) was developed and used to simulate the response of a single shaft with 1% reinforcement. Additional simulations of the pile group were performed to evaluate the effects of cap rotation on group response. By comparing the simulated responses for common conditions, i.e., 1% reinforcing ratio and zero head rotation, group efficiencies were found to range from unity at lateral displacements < 0.004×d to 0.8 at small displacements ~0.01 – 0.02×d and up to 0.9 at failure (displacements > 0.04×d). Hence, we find that group efficiency depends on the level of nonlinearity in the foundation system. The general group efficiency, although not its displacement-dependence, is captured by p-multipliers in the literature for reinforced concrete, fixed-head piles.
4:00 PM-4:30 PM “Deep Foundation” Constructability Issues
Peter Alhorn, P.E., Condon-Johnson and Associates, Inc.
Existing structures often require foundation upgrades to resist additional foundation loads during seismic retrofits. This presentation illustrates seismic retrofit work at the Golden Gate Bridge’s North Anchorage House. Existing shallow foundations were stabilized using rock bolts and micropiles to carry lateral and vertical seismic loads.
4:30 PM-5:00 PM Q&A and Panel Discussion
5:00 PM-6:00 PM Reception in Conference Exhibit Hall
Seminar Information
Venue: Renaissance Hollywood Hotel & Spa
1755 N. Highland Avenue
Hollywood, CA 90028
Tel: 323-856-1200
Toll Free: 800-468-3571
Fax:
Web: Click here
Accommodation: Renaissance Hollywood Hotel & Spa
1755 N. Highland Avenue
Hollywood, CA 90028
Tel: 323-856-1200
Toll Free: 800-468-3571
Web: Click here
These rates are discounted room rates for DFI Attendees, subject to availability. The special rate will also be honored 3 days prior and 3 days following the seminar, based on availability. If you have any difficulty in obtaining a room, please contact Lorraine Engleman Click Here for assistance.
*Please make reservations early. DFI's discounted rates are subject to a cut-off date, (Monday, September 20, 2010) and availability.
Non-member Registration Fee: $395.00
DFI Member Registration Fee: $350.00
Student registration: Discounted Student Registration is available on a limited basis. Student must provide a copy of their ID card.
Student Registration: $50.00
Full Seminar Attendee Registration Fees Include: Seminar Attendance, Breakfast, Breaks, Lunch, Reception, Registration Materials and presentation flash drive (printed Binders can be ordered at an additional cost if desired-contact DFI HQ).
Acknowledgement: If your registration is received in DFI Headquarters prior to Friday, September 24, 2010, you will be sent a confirmation.
Cancellation: Sorry, No Refunds after September 24, 2010. If you are unable to attend, your registration may be transferred to another individual provided they are a DFI member. Cancellations prior to September 24, 2010 must be made in writing via fax or mail.
Payment: Payment must accompany your registration. Register on-line or fax your registration with credit card information included, or mail with credit card information, check or money order.
Blue Ribbon Travel is DFI's official travel coordinator. Call Lorraine Engelman(lorraine@blueribbon.travel) at (718) 767-5455 for assistance with your travel and accommodation needs.
ALL SEMINAR ATTENDEES WILL RECEIVE A CERTIFICATE OF PARTICIPATION VERIFYING PROFESSIONAL DEVELOPMENT HOURS

In recognition of the fact that an increasing number of professional engineering licensing bodies require members to pursue professional development on a formal basis, DFI provides a general Certificate of Participation for all programs. Currently this certificate is accepted by most state professional engineering licensing bodies as documentation of your pursuit of continuing education requirements. There are however some states that may not accept the general DFI Certificate. It is the responsibility of the individual to determine if hours provided by DFI events are accepted by their licensing body.

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