Dynamic Response Study of a Single Tower Cable Stayed Bridge using Finite Element Method

Muhammad Habib,Muhammad Akram,Saeedullah Jan Mandokhail,Anila Ali,Samiullah Khan,Ali Asgher,Gohram Khan,Naik Muhammad,Muhammad Irfan,Zafar Baloch,Azmatullah Khan

doi:10.36785/jaes.102305

Abstract

Cable-stayed bridges are most widely used in modern bridge construction. The dynamic response of a single tower cable-stayed bridge is studied by performing nonlinear dynamic analysis using finite element method based software ANSYS. A three-dimensional bridge model was developed. Steel cables were simulated using a single element approach. Due to the coupling effects, the bridge exhibits complex modal shapes. The response of the bridge in the vertical direction is more elastic and flexible as compared to the longitudinal and transverse direction. The response of the critical sections of girder, tower, and cables was also studied by time-history analysis using the ground acceleration data of EI-Centro 1940. A 10-second ground data with 0.0001 second time step was used.

Highlights

Date Received 03-09-2019 Date Accepted 11-10-2019 Date Published 18-12-2020 basic vibration periods and low spectral accelerations
Very few supports are present in cable stayed bridges which allow a large relative movement which adds to its dynamic behavior
CCable stayed bridges (CSB) are the most widely used for amplitudes due to earthquake or dynamic loads are produced medium to long span bridges due to their aesthetics, rapid because of its high flexibility, light weight, and low damping construction, and economic viability

Summary

INTRODUCTION

Spectrum analysis and concluded that it can resist a ground acceleration of 0.216g [7]. With increasing lengths of the main span, the bridges having slender sections are possible only if highly effects of wind and other dynamic forces increases [9].Seismic advanced and precise techniques are used to predict the response studies of the cable stayed bridges are the focus of the structural response due to dynamic loadings. Studies are the main focus of the researchers since the collapse In this paper, the dynamic response of a single tower cable of Tocoma Narrows Bridge in 1940 [2, 3]. The dynamic response of the concrete cable stayed bridge was studied considering the effect of cables [6]

MODELLING OF THE BRIDGE USING THE FINITE ELEMENT METHOD

RESULTS AND DISCUSSIONS

Modal Analysis of the Cable Stayed Bridge

TIME HISTORY ANALYSIS AND RESPONSE

CONCLUSIONS