scholarly journals A SIMPLIFIED MODEL OF STEEL STRUCTURAL MEMBERS WITH STRENGTH DETERIORATION USED FOR EARTHQUAKE RESPONSE ANALYSIS

Author(s):  
Linghua MENG ◽  
Kenichi OHI ◽  
Kohichi TAKANASHI
2011 ◽  
Vol 6 (1) ◽  
pp. 18-25
Author(s):  
Yu Ooka ◽  
◽  
Kazuyuki Izuno ◽  
Kenzo Toki ◽  
◽  
...  

This paper examines the seismic performance of Japanese traditional wooden structures considering stiffness and strength aging changes in old structural members. In strength and embedding testing done to evaluate the strength properties of old structural members, results showed that zelkova has a Young’s modulus similar or larger than new members. In nonlinear earthquake response analysis for a Kiyomizudera model based on test results, maximum angle response of columns was decreased reflecting old zelkova stiffness and strength.


2008 ◽  
Vol 24 (2) ◽  
pp. 343-386 ◽  
Author(s):  
Yuyi Zhang ◽  
Joel P. Conte ◽  
Zhaohui Yang ◽  
Ahmed Elgamal ◽  
Jacobo Bielak ◽  
...  

This paper presents a two-dimensional advanced nonlinear FE model of an actual bridge, the Humboldt Bay Middle Channel (HBMC) Bridge, and its response to seismic input motions. This computational model is developed in the new structural analysis software framework OpenSees. The foundation soil is included to incorporate soil-foundation-structure interaction effects. Realistic nonlinear constitutive models for cyclic loading are used for the structural (concrete and reinforcing steel) and soil materials. The materials in the various soil layers are modeled using multi-yield-surface plasticity models incorporating liquefaction effects. Lysmer-type absorbing/transmitting boundaries are employed to avoid spurious wave reflections along the boundaries of the computational soil domain. Both procedures and results of earthquake response analysis are presented. The simulation results indicate that the earthquake response of the bridge is significantly affected by inelastic deformations of the supporting soil medium due to lateral spreading induced by soil liquefaction.


2008 ◽  
Vol 73 (624) ◽  
pp. 243-250
Author(s):  
Katsuichirou HIJIKATA ◽  
Akira IMAMURA ◽  
Fumio YAGISHITA ◽  
Hiroyuki YOSHIDA ◽  
Masayuki HASEGAWA ◽  
...  

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