Incremental Dynamic Analysis of Highway Bridges with Novel Shape Memory Alloy Isolators

Base isolators are commonly used to protect highway bridges from severe seismic damage. A novel self-centering isolator based on superelastic shape memory alloy (SMA) has been proposed to be installed between the piers and decks of highway bridges. This paper systematically evaluates the seismic performance of SMA isolators via the incremental dynamic analysis (IDA) of a prototype highway bridge with SMA isolators. The multi-span reinforced concrete highway bridge and the corresponding SMA isolators are designed according to an ad hoc displacement-based design (DBD) approach. The seismic analyses are conducted under different seismic intensity levels using the computation program DRAIN2DX. IDA results indicate that the SMA isolators can effectively protect the superstructure of the highway bridge and minimize the post-earthquake residual deformation. The properly designed highway bridges with SMA isolators are subjected to limited damage under frequent and design basis earthquakes.

[1]  Andre Filiatrault,et al.  Posttensioned Energy Dissipating Connections for Moment-Resisting Steel Frames , 2002 .

[2]  Yu-Chen Ou,et al.  Simplified Analytical Pushover Method for Precast Segmental Concrete Bridge Columns , 2013 .

[3]  Yunfeng Zhang,et al.  Seismic Performance of Reinforced Concrete Frames Retrofitted with Self-Centering Hybrid Wall , 2012 .

[4]  Jianfeng Zhao,et al.  Seismic damage of highway bridges during the 2008 Wenchuan earthquake , 2009 .

[5]  Krzysztof Wilde,et al.  Base isolation system with shape memory alloy device for elevated highway bridges , 2000 .

[6]  Bassem O Andrawes,et al.  Application of shape memory alloy dampers in the seismic control of cable-stayed bridges , 2009 .

[7]  Mervyn J. Kowalsky,et al.  A displacement‐based approach for the seismic design of continuous concrete bridges , 2002 .

[8]  Matthew R. Eatherton,et al.  Development and experimental validation of a nickel–titanium shape memory alloy self-centering buckling-restrained brace , 2012 .

[9]  Krzysztof Wilde,et al.  Pounding of superstructure segments in isolated elevated bridge during earthquakes , 1998 .

[10]  M. Priestley.  DISPLACEMENT-BASED SEISMIC ASSESSMENT OF REINFORCED CONCRETE BUILDINGS , 1997 .

[11]  Keh-Chyuan Tsai,et al.  Seismic self‐centering steel beam‐to‐column moment connections using bolted friction devices , 2008 .

[12]  Richard Sause,et al.  Posttensioned Seismic-Resistant Connections for Steel Frames , 2001 .

[13]  Songye Zhu,et al.  Displacement-based design approach for highway bridges with SMA isolators , 2011 .

[14]  Eunsoo Choi,et al.  A new concept of isolation bearings for highway steel bridges using shape memory alloys , 2005 .

[15]  Lucia Faravelli,et al.  An SMA passive device proposed within the highway bridge benchmark , 2009 .

[16]  Robert Tremblay,et al.  Self-Centering Energy Dissipative Bracing System for the Seismic Resistance of Structures: Development and Validation , 2008 .

[17]  Donatello Cardone,et al.  Seismic isolation of bridges using isolation systems based on flat sliding bearings , 2007 .

[18]  Johnny Sun,et al.  Development of Ground Motion Time Histories for Phase 2 of the FEMA/SAC Steel Project , 1997 .

[19]  Reginald DesRoches,et al.  Unseating prevention for multiple frame bridges using superelastic devices , 2005 .

[20]  Songye Zhu,et al.  A shape memory alloy-based reusable hysteretic damper for seismic hazard mitigation , 2007 .

[21]  Songye Zhu,et al.  Mechanical properties of superelastic Cu–Al–Be wires at cold temperatures for the seismic protection of bridges , 2008 .

[22]  Stefan Hurlebaus,et al.  Evaluation of the performance of a sliding-type base isolation system with a NiTi shape memory alloy device considering temperature effects , 2010 .

[23]  K. Chang,et al.  Seismic Performance of Highway Bridges , 2000 .

[24]  Stefan Hurlebaus,et al.  Optimal design of superelastic‐friction base isolators for seismic protection of highway bridges against near‐field earthquakes , 2011 .

[25]  H. Hao,et al.  Pounding Damage to Buildings and Bridges in the 22 February 2011 Christchurch Earthquake , 2012 .