THREE-DIMENSIONAL SEISMIC RESPONSE AND STORY-SAFETY-FACTOR OF RC FAMES

In this thesis, based on the design of a 140+90m span unusual single tower and single cable plane cable-stayed bridge, free vibration characteristics and seismic response are investigated; three dimensional finite element models of a single tower cable-stayed bridge with and without the pile-soil-structure interaction are established respectively by utilizing finite element software MIDAS/CIVIL, seismic response of Response spectrum and Earthquake schedule are analyzed respectively and compared. By the comparison of the data analysis, for small stiffness span cable-stayed bridge, the pile-soil-structure interaction can not be ignored with calculation and analysis of seismic response.

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Viscoelastic Boundary Conditions for Multiple Excitation Sources in the Time Domain

Mathematical Problems in Engineering ◽

10.1155/2018/7982342 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11

Author(s):

Chen Xia ◽

Chengzhi Qi ◽

Xiaozhao Li

Keyword(s):

Finite Element ◽

Seismic Response ◽

Time Domain ◽

Seismic Waves ◽

Three Dimensional ◽

Seismic Loads ◽

Element Analysis ◽

Artificial Boundaries ◽

The Time Domain ◽

Transmitting Boundaries

Transmitting boundaries are important for modeling the wave propagation in the finite element analysis of dynamic foundation problems. In this study, viscoelastic boundaries for multiple seismic waves or excitations sources were derived for two-dimensional and three-dimensional conditions in the time domain, which were proved to be solid by finite element models. Then, the method for equivalent forces’ input of seismic waves was also described when the proposed artificial boundaries were applied. Comparisons between numerical calculations and analytical results validate this seismic excitation input method. The seismic response of subway station under different seismic loads input methods indicates that asymmetric input seismic loads would cause different deformations from the symmetric input seismic loads, and whether it would increase or decrease the seismic response depends on the parameters of the specific structure and surrounding soil.

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Seismic Response Analysis on Flat L-Shaped Frame Structure Based on FEM

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.166-169.2138 ◽

2012 ◽

Vol 166-169 ◽

pp. 2138-2142

Author(s):

Hui Min Wang ◽

Liang Cao ◽

Ji Yao ◽

Zhi Liang Wang

Keyword(s):

Seismic Response ◽

Three Dimensional ◽

Time History ◽

Frame Structure ◽

Response Analysis ◽

Reinforced Concrete Frame ◽

Seismic Response Analysis ◽

Concrete Frame ◽

History Analysis ◽

Complex Features

For the complex features in the form of a flat L-shaped reinforced concrete frame structure, the three dimensional FEM model of the structure was established in this paper, and the dynamic characteristics of the structure was analyzed, the participation equivalent mass of every mode’s order was obtained. Seismic response analysis for the structure was carried out with modal decomposition spectrum method and time history analysis method, the weak layer of the structure was pointed out and the reference for the structural design was provided.

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