Abstract
Accurate and efficient estimation of tension in hangers is very important since hangers are the vital component of suspension bridges. But for hangers with shock absorber, the existing tension estimation methods are not suitable because they are based on a single cable model and cannot consider the effect of shock absorbers. To this end, the effect of the shock absorber is taken into account by using the degree-of-freedom condensation method, and a finite element method for tension estimation of hangers with shock absorber is proposed in this paper. Finally, the proposed method is applied in the Aizhai Bridge and Huangpu Pearl River Bridge to estimate the tension of hangers with shock absorber, the tested results show that as compared with other methods, the proposed method is a more accurate and convenient method for engineering application.
Highlights
Cable supported bridges are widely used nowadays since their advantage consists in the ability to cross large spans
A finite element model-based method was proposed to estimate the tension of hangers with shock absorbers, and its reliability and applicability are investigated through two engineering examples
The main conclusions are as follows: 1) The displacement vectors of the centroid are used to represent the displacement vectors of the 4 corner nodes of the shock absorber by using the deformation compatibility conditions through the idea of master-slave degrees of freedom, and the contribution of the shock absorber to the stiffness and mass of the hanger system is taken into account
Summary
Cable supported bridges are widely used nowadays since their advantage consists in the ability to cross large spans. The direct method consists in measuring the cable force directly by load transducer which should be installed at the cable anchorage during construction. This method can determine the cable tension directly and accurately, but the cost is very expensive. TENSION ESTIMATION OF HANGERS WITH SHOCK ABSORBER IN SUSPENSION BRIDGE USING FINITE ELEMENT METHOD. The second kind is the beam theory formula which is derived from the vibration equation of an axially loaded beam with simple supports [15]. In order to solve this problem, a tension estimation method of hangers with shock absorber in suspension bridge by using the finite element method is proposed in this paper
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