OPAC Consulting Engineers

Vivian Chang

Principal

email:

vchang@opacengineers.com

Telephone:

415 989 4551 x208

Registration:

Professional Engineer in California (C37966)

Education:

M.S. - Civil Engineering, University of California, Berkeley, 1982

B.S. - Civil Engineering, University of California, Berkeley, 1981

Employment History:

1994-present

OPAC Consulting Engineers, Principal Engineer.

1991-1994

Parsons Brinckerhoff Quade and Douglas, Supervising Structural Engineer.

1982-1991

T.Y. Lin International, Design Engineer to Project Manager.

Professional Experience

Vivian Chang has 28 years of experience in the design, project management and construction support of highway and transit bridges. Ms. Chang has designed a variety of bridge and transit structures that include prestressed concrete box girders, prestressed segmental concrete box girders, steel arch, and cable supported structures. She has provided project management and construction support engineering on various complex bridge and transit projects.

Key Qualifications

  • Management of bridge projects.
  • Management of large-scale metropolitan rail transit projects.
  • Production of contract documents for bridge and rail transit projects.
  • Development of bridge and transit structure erection procedures.
  • Design of bridge and transit structures to accommodate strict aesthetic, urban and traffic constraints.
  • Design of transit bridges utilizing segmental cantilever construction method.
  • Seismic analysis of bridge structures.
  • Design of pedestrian bridges.
  • Design of long span bridges.
  • Structural modeling and analysis.
  • Technical support during construction.

Relevant Project Experience

Selected projects by Vivian Chang are listed below:


BART Warm Springs Extension - Design

BART Warm Springs Extension

Design of a 5.4 mile BART extension

Fremont, California. Construction completion 2011

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Hoover Dam Bypass: Colorado River Bridge - Construction Engineering

Hoover Dam Bypass: Colorado River Bridge

Construction engineering for a 1,090 ft concrete arch bridge downstream of the Hoover Dam.

Nevada-Arizona. Construction completion 2010

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Nanning Bridge - Design

Nanning Bridge

A 300 m span steel arch bridge across the Yong River. The arch ribs are steel box sections and the deck consists of a steel box girder with an orthotropic deck.

Nanning City, China. Construction completed 2009

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BART Earthquake Safety Program - Seismic Retrofit Design

BART Earthquake Safety Program

Performed seismic vulnerability studies on multiple BART viaducts

San Francisco Bay Area, California. Design completed 2009

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Third Carquinez Strait Bridge - Design

Third Carquinez Strait Bridge

A 728 m span suspension bridge with a steel orthotropic deck. The new suspension bridge replaced a 75 year old truss bridge across the Carquinez Strait.

Sacramento River, Crockett - Vallejo, California. Construction completed 2004

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Berkeley I-80 Pedestrian Overcrossing - Design

Berkeley I-80 Pedestrian Overcrossing

A 90 m span arch bridge for pedestrian and bicycle across the I-80 freeway in Berkeley. The steel arch ribs consist of curved inclined steel pipes in a basket handle configuration.

Berkeley, California. Construction completed 2002

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SFIA Airport Rail Transit Guideway - Design

SFIA Airport Rail Transit Guideway

Design of an elevated guideway for automated transit system at the San Francisco International Airport.

San Francisco, California. Construction completed 2002

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SFIA Elevated Circulation Roads - Design

SFIA Elevated Circulation Roads

Design of a single-level and double-deck concrete box girder structure to provide access between the freeway and international/do­mestic terminals at the San Francisco International Airport.

San Francisco, California. Construction completed 2000

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BART Dublin/Pleasanton Extension - Design Review & Construction Support

BART Dublin/Pleasanton Extension

The 14 mile BART Dublin/Pleasanton Extension includes 19 bridges, one cut-and-cover tunnelsand 2 stations.

Dublin-Pleasanton, California. Construction completed 1998

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Rosecrans/Aviation and Kramer Bridges - Design

Rosecrans/Aviation and Kramer Bridges

Segmental concrete bridges to cross a heavily traveled artery and a contaminated site.

Hawthorne, California. Construction completed 1991

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Cochrane Bridge - Construction Engineering

Cochrane Bridge

Redesign for construction of 195-ft long prestressed concrete box girder segments cast on ground and lifted into final position.

Mobile, Alabama. Construction completed 1988

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