|Table of Contents|

Calculation formula of longitudinal fundamental vibration frequency for continuous rigid frame bridge with high piers based on energy method

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2013年03期
Page:
48-54
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Calculation formula of longitudinal fundamental vibration frequency for continuous rigid frame bridge with high piers based on energy method
Author(s):
ZHOU Yong-jun1; 2;  ZHANG Xiao-dong1; 2;  SONG Yi-fan1; 2;  ZHAO Yu1; 2
1. Engineering Research Center for Large Highway Structure Safety of the Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China; 2. Key Laboratory of Bridge Detection Reinforcement Technology Ministry of Communications, Chang’an University, Xi’an 710064, Shaanxi, China
Keywords:
bridge engineering;  continuous rigid frame bridge with high pier;  fundamental frequency;  fundamental mode shape function;  energy method;  guideline for seismic design of highway bridge
PACS:
U442.55
DOI:
-
Abstract:
In order to obtain the function of fundamental vibration frequency of the rigid frame bridge, firstly, a typical rigid frame bridge with high piers was taken as an example, and 64 similar bridges were fabricated and their finite element(FE)models were set up to obtain the structural natural vibration characteristics, then, the fundamental mode shape function of this type of structure was put forward so as to deduce the theoretical fundamental frequency formula by Rayleigh method. Finally, the presented theoretical formula of fundamental frequency was validated by the engineering and the fundamental frequency formula in the current guidelines for seismic design of highway bridges was discussed therein. The results indicate that the basic oscillation of the rigid frame bridge with high piers consists of the longitudinal vibration of piers, and that the fundamental frequency calculated by the recommended method has an error of 5% compared with the FE result, and the frequency calculation in the guidelines can not be applied to such irregular bridges as the rigid frame bridges. 2 tabs, 2 figs, 15 refs.

References:

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Last Update: 2013-05-30