Performance Based Earthquake Engineer ing: Application to an Actual Bridge-Foundation - Printable Version +- Civil Engineering Association (https://forum.civilea.com) +-- Forum: eBooks (https://forum.civilea.com/forum-63.html) +--- Forum: Journals, Papers and Presentations (https://forum.civilea.com/forum-74.html) +--- Thread: Performance Based Earthquake Engineer ing: Application to an Actual Bridge-Foundation (/thread-47507.html) |
Performance Based Earthquake Engineer ing: Application to an Actual Bridge-Foundation - TAFATNEB - 05-03-2014 Performance Based Earthquake Engineer ing: Application to an Actual Bridge-Foundation-Ground System Author: Joel P. Conteb , Yuyi Zhang | Size: 1 MB | Format: PDF | Quality: Unspecified | Publisher: 12th Italian National Conference on Earthquake Engineering, Pisa, Italy, June 10-14, 2007 | Year: 2007 | pages: 18
Performance-based earthquake engineering (PBEE) is emerging as the next-generation design and evaluation framework under which new and existing structures will be analyzed for seismic adequacy. This paper presents the application of the PBEE methodology developed at the Pacific Earthquake Engineering Research (PEER) Center to the Humboldt Bay Middle Channel (HBMC) Bridge modeled and analyzed as a nonlinear soil-foundation-structure interaction (SFSI) system. The HBMCB, with precast and prestressed concrete Igirders and cast-in-place concrete slabs, is fairly representative of older AASHTO-Caltrans girder bridges. It is supported on pile groups in soils potentially vulnerable to liquefaction during an earthquake, which could induce lateral spreading and permanent soil deformations. This paper presents the nonlinear finite element model of the bridge-foundation-ground (BFG) system used in this study and then focuses on the several analytical steps of the PEER PBEE methodology as applied to this bridge. This methodology integrates in a probabilistic framework seismic hazard analysis, seismic demand analysis, capacity analysis, reliability/damage analysis, and loss analysis. Several potential failure mechanisms of the HBMC Bridge are considered: flexural failure of bridge piers, failure of shear key(s), and unseating. For each failure mechanism, several limit/damage-states measuring the stage of formation of the mechanism are defined. The seismic reliability against these limit-states is evaluated in terms of mean annual rate/frequency of exceedance or, alternatively, return period. As outcome of seismic loss analysis, the seismic loss hazard curve expresses the mean annual frequency of exceeding any total annual seismic repair/ replacement cost. The paper presents selective results illustrating the various steps of the PEER PBEE methodology as applied to the HBMC Bridge Code: *************************************** |