Earthquake Behavior Simulation of Bridges and Others
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disaster simulation for an urban area, with GIS, CAD, FEA and VR integration,
Proc. 12th Int. Conf. on Computing in Civil and Building
Engineering, Oct. 2008, Beijing, CDROM
Abstract: For a disaster whose scale
includes an urban area, it is difficult to study it with physical experiments.
Thus, numerical simulation is a very efficient tool for such problem.
This paper aims at developing an integrated urban earthquake simulation
system (UESS) that uses GIS as the model source, CAD as the model generating
tools, FEA as damage prediction and VR as the post-process platform.
An automatic procedure is developed to buildup the 3D structural model
of buildings in an urban area, as well as to simulate their earthquake
performances, from the digital map of GIS. And the simulation results
are presented in an integrated interface with a GIS view-port for position
finding, a CAD view-port for 3D structural damage identification and
a VR view-port for 3D dynamic structural vibration display. An urban
example with more than 7000 buildings is select to demonstrate the feasibility
of proposed system.
Key Words: Earthquake simulation; Virtual Reality; integration;
Vega; VRGIS
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