Seismic design of the San Francisco - Oakland Bay Bridge self anchored suspension bridge

2012 ◽  
pp. 1999-2007
Author(s):  
M Nader ◽  
M Tang ◽  
B Maroney
Keyword(s):  
San Francisco ◽  
Seismic Design ◽  
Suspension Bridge

Design of the New San Francisco-Oakland Bay Bridge Self-Anchored Suspension Bridge

2004 ◽  
Vol 88 (6) ◽  
pp. 176-181
Author(s):  
Marwan Nader ◽  
Rafael Manzanarez ◽  
George Baker
Keyword(s):  
San Francisco ◽  
Suspension Bridge

scholarly journals Dynamic Characteristics and Seismic Response Analysis of Self-Anchored Suspension Bridge

2012 ◽  
Vol 5 ◽  
pp. 183-188
Author(s):  
Lian Zhen Zhang ◽  
Tian Liang Chen
Keyword(s):  
Seismic Response ◽  
Seismic Design ◽  
Dynamic Characteristics ◽  
Response Spectrum ◽  
Time History ◽  
Suspension Bridge ◽  
Bridge Engineering ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Seismic Design Code

Self-anchored suspension bridge is widely used in Chinese City bridge engineering for the past few years. Because the anchorage system of main cable has been changed from anchorage blocks to the ends of the girder, its’ dynamic mechanics behavior is greatly distinguished with the traditional earth anchored suspension bridge. This paper studies the dynamic characteristics and seismic response of one large-span self-anchored suspension bridge which is located in China/Shenyang city. Using a spatial dynamic analysis finite element mode, the dynamic characteristics are calculated out. An artificial seismic wave is adopted as the ground motion input which is fitted with acceleration response spectrum according to the Chinese bridge anti-seismic design code. Time-integration method is used to get the seismic time-history response. Geometry nonlinear effect is considered during the time-history analysis. At last, the dynamic characteristics and the behavior of earthquake response of this type bridge structure are discussed clearly. The research results can be used as the reference of seismic response analysis and anti-seismic design for the same type of bridge.

Design of the New San Francisco-Oakland Bay Bridge Self-Anchored Suspension Bridge

2002 ◽  
Vol 86 (16) ◽  
pp. 15-27 ◽  
Author(s):  
Marwan Nader ◽  
Rafael Manzanarez ◽  
Man-Chung Tang
Keyword(s):  
San Francisco ◽  
Suspension Bridge

The Public's Role in Seismic Design Provisions

2016 ◽  
Vol 32 (3) ◽  
pp. 1345-1361 ◽  
Author(s):  
Michael Davis ◽  
Keith Porter
Keyword(s):  
San Francisco ◽  
Seismic Design ◽  
Action Plan ◽  
Large Earthquake ◽  
The United States ◽  
Community Action ◽  
Seismic Safety ◽  
The Public ◽  
New Buildings ◽  
Civil Engineers

Seismic design provisions in the United States reflect structural engineers’ experience, technical capabilities, and judgment of what is in the public's interest. Yet the American Society of Civil Engineers’ (ASCE) Code of Ethics implicitly requires civil engineers to make a reasonable effort to elicit and reflect the preferences of the public, whose lives and livelihoods are at stake, when setting performance objectives. The public seems capable of expressing its preferences clearly, as suggested by the San Francisco Community Action Plan for Seismic Safety and the residential code enhancement adopted by Moore, Oklahoma. And at least one public opinion survey suggests that people in earthquake country prefer better performance than the code intends for new buildings, namely, that buildings should largely remain functional or habitable after a large earthquake. The public also seems willing to pay more for new buildings that meet its expectations.

Cyclic Behavior of Large Beam-Column Assemblies

1985 ◽  
Vol 1 (2) ◽  
pp. 203-238 ◽  
Author(s):  
Egor P. Popov ◽  
Navin R. Amin ◽  
Jason J. C. Louie ◽  
Roy M. Stephen
Keyword(s):  
San Francisco ◽  
Seismic Design ◽  
Cyclic Behavior ◽  
Steel Buildings ◽  
Cross Sectional ◽  
Moment Resisting ◽  
Series Of Experiments ◽  
Story Building ◽  
The U.S ◽  
Large Moment

A series of experiments were conducted in order to verify the design criteria for beam-column joints under extreme seismic conditions for a 47-story building in San Francisco. The half-scale cruciform specimens were exceptionally large requiring 18 in. deep sections. The overall size of the specimens was the largest ever tested in the U.S. for this kind of application. The data on the behavior of such large moment-resisting joints under severe cyclic loading are very limited. The experimental evidence clearly supports the use of stiffeners and doubler plates at the joints for the cross-sectional geometries tested. The results are of direct relevance to seismic design of many steel buildings.

scholarly journals Toward functional recovery performance in the seismic design of modern tall buildings

2021 ◽  
pp. 875529302110336
Author(s):  
Carlos Molina Hutt ◽  
Anne M Hulsey ◽  
Preetish Kakoty ◽  
Greg G Deierlein ◽  
Alireza Eksir Monfared ◽  
...  
Keyword(s):  
Ground Motion ◽  
San Francisco ◽  
Seismic Design ◽  
Structural Damage ◽  
Tall Buildings ◽  
Residential Building ◽  
Design Guidelines ◽  
Life Safety ◽  
Recovery Times ◽  
The Impact

Current building code requirements for seismic design are primarily intended to minimize life-safety risks due to structural damage under extreme earthquakes. While tall buildings designed under current standards are expected to achieve the life-safety goal, this study estimates that they may require up to 7.5 months of repair to return to functionality after a design-level earthquake (roughly equivalent to ground motion shaking with a 10% probability of exceedance in 50 years), and over 1 year after a risk-targeted maximum considered earthquake (roughly equivalent to ground motion shaking with a 2%–4% chance of exceedance in 50 years). These long downtimes, which correspond to median predictions, far exceed recovery goals for major employers and other recovery-critical uses and can have disproportionately harmful effects on businesses and residents. To address such extensive downtime risks, we evaluate the impact of recovery-based design guidelines for reducing recovery times through (1) more stringent drift limits under expected ground motions and (2) measures to mitigate externalities that impede recovery. The results suggest that by combining these strategies, expected recovery times following a design-level earthquake can be reduced to roughly 1 month, and to 2 months following a risk-targeted maximum considered earthquake. These findings are illustrated for an archetype 42-story reinforced concrete shear wall residential building and a 40-story steel buckling-restrained braced frame office building in San Francisco, CA.

Comparison of Seismic Design Schemes for Suspension Bridge in Mountain Region with Strong Earthquake

2013 ◽  
Vol 438-439 ◽  
pp. 1065-1068
Author(s):  
Gui Lin Wu ◽  
Qian Jiang Yang ◽  
Wen Jun Gao
Keyword(s):  
Seismic Design ◽  
Strong Earthquake ◽  
Concrete Columns ◽  
Suspension Bridge ◽  
Pile Group ◽  
Mountain Region ◽  
Project Area ◽  
Full Size ◽  
Earthquake Probability ◽  
Bridge Models

The Longjiang Bridge is a kilometer level suspension bridge supported by reinforced concrete towers. The towers will be founded on pile group foundation, and the project area is in a mountain region of high earthquake probability. Two seismic schemes were designed for the bridge, and two computational bridge models in full size were established, extensive studies were performed to capture the seismic response of different schemes for the earthquakes. The results show that towers composed of two curved quadrilateral hollow concrete columns are adopted for the bridge.

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