Study on Collapse of Bridge Structures
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DownloadProgressive
collapse simulation and components importance evaluation of stone arch
bridge,
Journal of Lanzhou
Jiaotong University, 2010, 29(6): 25-30.
Abstract: Bridges are important
lifeline projects, so the collapse accidents of bridge will cause significant
casualties and properties losses. Computer simulation has a bright future
to discover the reasons of bridge accidents. Taking the progressive
collapse accidents of stone arch bridges which suffered greatest in
recent years for an example, this paper establishes a 3D finite element
(FE) model of stone arch bridges with the general-purpose finite element
program-MSC.MARC. The process of collapse is simulated with the contact
algorithm and the deactivation of elements, and the possible reasons
of the collapse are analyzed. Furthermore, the importance of different
components of the stone arch bridge is indexed with the conception of
the generalized stiffness of structure, so as to get the most critical
regions of the stone arch bridge. The results show that the process
of collapse simulated in this work agrees well with the actual process
and the predicted critical regions are correct and reasonable, which
provides references for design, construction and maintenance of arch
bridge.
Keywords: Stone arch bridge, Progressive collapse, Simulation,
Deactivation elements, Critical regions
Progressive
collapses simulation and importance assessment of stone arch bridge,
Proc. 11th Int. Symposium on Structural Engineering,
2010.12. Guangzhou, China: 1549-1554.
Abstract: With the increasing accidents
of structures caused by human errors, terrorist attacks or nature disasters
in recent years, disaster-prevention and hazard-mitigation for structures
have aroused the concern of engineers, especially the safety of infrastructures.
Based on a traditional 3-span stone arch bridge, this paper establishes
a 3-D finite element (FE) model of the stone arch bridge with the general-purpose
finite element program-MSC.MARC. The process of the collapse is simulated
with the contact algorithm and the deactivation of elements, and the
possible reasons of the collapse are analyzed. Furthermore, the importance
of different components of the stone arch bridge is indexed with the
conception of the generalized structural stiffness, so as to identify
the most critical regions of the stone arch bridge. The predicted critical
regions are verified to be correct and reasonable via limit analysis,
which provides references for the design, construction and maintenance
of arch bridges.
Keywords: Stone arch bridge, Progressive collapse, Computer simulation,
Deactivation element, Critical region
The
components importance evaluation and overload induced collapse simulation
for RC arch bridges,
Computer Aided Engineering, 2010, 19(3): 26-30.
Abstract: Recently, the collapse
accidents of arch bridges happened frequently, which caused great economic
losses and casualties. So it is important to study the mechanism and
countermeasure of the collapse of arch bridges. Based on a reinforced
concrete (RC) arch bridge, this paper builds up the finite element model
firstly. And then the generalized structural stiffness-based importance
index is adopted to evaluate the components importance indices of the
arch bridge, so that the critical regions for the safety of the arch
bridge are identified. Finally, the process of collapse induced by overloading
is simulated with the program of TECS. The simulation results can provide
references to analyze the collapse reasons and to evaluate the collapse
resistance capacity of arch bridge.
Keywords: Arch bridge, Importance indices evaluation, Overload,
Collapse
A
preliminary study on the investigation of the bridge collapse accident
scenes based on finite element analysis and virtual reality,
Proc. 2010 National Bridge Conference, Nov, 2010, Nanjing,
China: 921-927.
A
preliminary study on the application of computer simulation in the progressive
collapse of bridges,
Proc. 13th Int. Conf. on Computing in Civil and Building
Engineering, Jun. 2010, Nottingham, UK, CDROM.
Abstract: Bridges are important
lifeline projects, so the collapse accidents of bridge will cause significant
casualties and properties losses. Computer simulation has a bright future
to discover the reasons of bridge accidents. Taking the progressive
collapse accidents of stone arch bridges which suffered greatest in
recent years for an example, this paper establishes a finite element
(FE) model of the stone arch bridge with the general-purpose finite
element program-MSC.MARC. The process of the collapse is simulated with
the contact algorithm and the deactivation of elements, and the possible
reasons of the collapse are analyzed. Furthermore, the importance of
different components of the stone arch bridge is indexed with the conception
of the generalized structural stiffness, so as to identify the most
critical regions of the stone arch bridge. The predicted critical regions
are verified to be correct and reasonable via limit analysis, which
provides references for the design, construction and maintenance of
arch bridges.
Keywords: Stone arch bridge, Progressive collapse, Computer simulation,
Deactivation element, Critical region.
High
Performance Simulation for Bridges under Disaster
Proc. 1st Symp. on High Performance Computing (HPC) Technology
in Engineering Design, 2007. Dec. 11-12, Shanghai: 102-110.
Abstract: Bridge is the key project
in lifeline engineering. Currently, various natural and man-induced
disasters become a serious threat to the bridges in China. Due to the
large-scale, unpredictable, and destructive features of disasters, computer
simulation has obvious advantages in disaster prevention and mitigation
of bridges. This paper presents the researches on disaster prevention
and mitigation of bridges developed by the Department of Civil Engineering
in Tsinghua University, which base on high performance computing. The
nonlinear computing method is discussed and benchmarked with large-scale
test. High performance simulation on different scales for bridges implemented
by Tsinghua University are presented. In small scale, analyses about
dynamic behavior of the bridge traveled by overload trucks and impact
on the bridge by over-high trucks are illustrated. And in large scale,
failure simulation for large viaducts with traveling wave effect is
presented. In addition, Tsinghua University also developed the nonlinear
quick modeling method for bridges, so as to provide abilities to conveniently
obtain the failure model and safety assessment of bridges under various
disasters.
Keywords: bridge, high performance simulation, overloaded, impact,
earthquake, quick modeling.
Failure
simulation for large viaducts with traveling wave effect
Earthquake Resistant Engineering and Retrofitting , 29(3),
2007, 1-5.
Abstract: Viaducts are important
life lines in the city transport system. Precision prediction for the
failure modes of large viaducts (viaduct system) in earthquake is important
for the disaster prevention and reduction. In this paper, based on high
performance computation and nonlinear analysis, the failure of large
viaducts in earthquake is simulated with the consideration of travel
wave effect in the ground, plastic hinges in the pier and the girder
falling in the superstructures. The simulation results show that the
proposed model can correctly simulate the failure of large viaducts
in earthquake. And parametrical study is carried out for the further
research on the safety assessment of the large viaducts.
Keywords: viaduct, earthquake, traveling wave, failure, simulation