NDLI: Study on seismic disaster mechanism of irregular C-shaped curved bridge with high piers

Content Provider	Springer Nature Link
Author	Li, Qingning Cheng, Maili Yin, Junhong Zhou, Chunjuan
Copyright Year	2016
Abstract	Based on multi-support excitation theory, an irregular C-shaped curved bridge model with high piers was made by taking scale proportion of 1:20 to conduct the seismic simulation shaking table test in this paper. Failure mode of high flexible piers and earthquake damage mechanism of the curved bridge with high piers in action of different seismic wave spectrum, different peak acceleration, and different local topography effect were studied. The results showed that the failure mode of high flexible pier presents obvious distributional flexible characteristics, #1 pier’s cracks concentrated in range of 0.125L–0.46L (L is the height of the piers) from the bottom of the pier, while #2 and #3 pier’s cracks concentrated in range of 0.07L–0.625L from the bottom of the piers. Pier elevation difference significantly affected pier cracks development and bridges dynamic response. Accompanied with increase of load, the fundamental frequency curve presented decline in leveling off, while the damping increased gradually and the capacity of seismic energy dissipation of the structure enhanced. Dynamic responses of the curved bridge are different and presented different law when four different seismic waves were applied. When seismic loads increased from 120 gal to 360 gal, peak dynamic response basically presented linear growth. When seismic loads increased from 480 gal to 960 gal, considering the local topography effect, peak dynamic response significantly presented nonlinear growth. In action of seismic load of 960 gal, the displacements at the top of the #1 and #3 piers were up to 32.3 mm, showing that the seismic response was relatively large at head and tail section of bridge thus prone to cause beam dropping down.
Starting Page	1429
Ending Page	1436
Page Count	8
File Format	PDF
ISSN	12267988
Journal	KSCE Journal of Civil Engineering
Volume Number	20
Issue Number	4
e-ISSN	19763808
Language	English
Publisher	Korean Society of Civil Engineers
Publisher Date	2015-08-07
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	high pier C-shaped curved bridge catastrophe model multi-support excitation shaking table test Civil Engineering Industrial Pollution Prevention Geotechnical Engineering & Applied Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Civil and Structural Engineering

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