Collapse mechanism analysis of the FIU pedestrian bridge based on the improved structural vulnerability theory (ISVT)

Abstract On Mar 152018, a pedestrian bridge on the campus of Florida International University (FIU bridge) collapsed during construction, and 6 victims were identified in this disaster event. This paper investigates the collapse mechanism of the FIU bridge through improved structural vulnerability theory (ISVT). A topological hierarchy model of the FIU bridge is established by the clustering process of the ISVT, and various possible collapse modes are identified by the unzipping process. Besides, the damage event that vibration effects by crane is considered in the computing work. By comparing the collapse mode identified by ISVT and the actual collapse scenario of the FIU bridge, it is found that ISVT could effectively identify the weakness and predicts the possible collapse modes of the FIU bridge by an quantitative vulnerability index. Then, parametric analyses are conducted for the bridge to different unforeseen damage events, and the collapse mechanism of the failure characteristics of the FIU bridge is also revealed by the ISVT. Finally, some suggestions are recommended for the structural design of rigid frame bridge like the FIU bridge.

[1]  S. Hao,et al.  I-35W Bridge Collapse , 2010 .

[2]  Wei Wang,et al.  Analysis of a bridge collapsed by an accidental blast loads , 2014 .

[3]  DA Dick Hordijk,et al.  State-of-the-art on load testing of concrete bridges , 2017 .

[4]  Valerio De Biagi,et al.  Structural behavior of a metallic truss under progressive damage , 2016 .

[5]  L. Anania,et al.  Damage and Collapse Mode of Existing Post Tensioned Precast Concrete Bridge: the Case of Petrulla Viaduct , 2018 .

[6]  Egidio Rizzi,et al.  Computational elastoplastic Limit Analysis of the Paderno d'Adda bridge (Italy, 1889) , 2018 .

[7]  Jihong Ye,et al.  Collapse optimization for domes under earthquake using a genetic simulated annealing algorithm , 2014 .

[8]  Ye Jihong,et al.  Collapse mechanism analysis of a steel moment frame based on structural vulnerability theory , 2018, Archives of Civil and Mechanical Engineering.

[9]  K. Goda,et al.  Collapse of Showa Bridge during 1964 Niigata Earthquake: a quantitative reappraisal on the failure mechanisms , 2014 .

[10]  Bernardino Chiaia,et al.  Complexity and robustness of frame structures , 2013 .

[11]  Jitendra Agarwal,et al.  Vulnerability of 3-dimensional trusses , 2001 .

[12]  P. R. Maiti,et al.  Failure of Chauras bridge , 2014 .

[13]  F. C. Hadipriono,et al.  ANALYSIS OF RECENT BRIDGE FAILURES IN THE UNITED STATES , 2003 .

[14]  Lu Deng,et al.  State-of-the-Art Review on the Causes and Mechanisms of Bridge Collapse , 2016 .

[15]  Ye Jihong,et al.  Structural Vulnerability of a Single-Layer Dome Based on Its Form , 2014 .

[16]  Paolo Zampieri,et al.  Collapse mechanisms of masonry arches with settled springing , 2018 .

[17]  Seung-Eock Kim,et al.  Analysis of the overall collapse mechanism of cable-stayed bridges with different cable layouts , 2007 .

[18]  Humberto Varum,et al.  Structural vulnerability of two traditional Portuguese timber structural systems , 2011 .

[19]  Shen Yan,et al.  Experimental study on progressive collapse-resistant behavior of planar trusses , 2017 .

[20]  David I Blockley,et al.  Vulnerability of structural systems , 2003 .

[21]  Gianni Arioli,et al.  Torsional instability in suspension bridges: The Tacoma Narrows Bridge case , 2015, Commun. Nonlinear Sci. Numer. Simul..

[22]  Dan M. Frangopol,et al.  Bridge Lifetime System Reliability Under Multiple Limit States , 2001 .

[23]  Pan Rui,et al.  Research on failure scenarios of domes based on form vulnerability , 2011 .

[24]  Sara Wadia-Fascetti,et al.  Fault Tree Analysis of Schoharie Creek Bridge Collapse , 2007 .

[25]  Josef Machacek,et al.  Composite steel and concrete bridge trusses , 2011 .

[26]  David I Blockley,et al.  The vulnerability of structures to unforeseen events , 2008 .

[27]  Hong Guan,et al.  Physics engine-driven visualization of deactivated elements and its application in bridge collapse simulation , 2013 .

[28]  Björn Åkesson.  Understanding bridge collapses , 2008 .

[29]  Frank Schanack,et al.  Collapse of Steel Bridges , 2007 .