In this paper, the aerodynamic and aeroelastic performance of the bridge tower of the Hong Kong-Zhuhai-Macao Bridge were investigated experimentally. The aerodynamic forces of the bridge tower were evaluated by using five-segment wind tunnel test models. The wind-induced dynamic response of the bridge tower in the alongwind, cross-wind, and torsional directions were tested by using an aeroelastic test model. From the wind tunnel tests, the drag, lift, and torsional force coefficients under different wind attack angles were observed and analysed. The aeroelastic phenomenon (i.e. galloping, vortex shedding) of the irregular bridge tower was evaluated. The most unfavourable case of wind-induced vibrations was analysed and checked. This study provides a way to evaluate aerodynamic and aeroelastic performance of an irregular bridge tower, and advances our understanding of the performance of the bridge tower.
This research simulates vertical bearing capacity of Prestressed Concrete piles by the theory basis of finite difference method and relevant material constitutive model for its capacity can be affected by soil plug effect significantly. Its Q-s curves are acquired and analyzed. The research indicates that load-settlement relationship of PC piles is proportional function basically within its bearing property. Also the advantages of FLAC 3D software are affirmed when analyzing piles settlement problems.
Abstract. The purpose of the paper is to research the vertical bearing capacity and settlement idiosyncracies of prestressed concrete piles. In-situ experiments, which was carried out by anchor-pile beam counterforce device, and numerical analysis methods was adopted as research methods on 3 tested piles. Mohr-Coulomb model was employed as the constitutive model of soil mass and isotropic elastic damage model as the constitutive model of piles to analyze its yield functions. Furthermore, the basic idea of modelling large deformation problems was analyzed based on Finite Difference Method (FDM). The comparison results was obtained in the paper and it suggested that the simulated data is highly identical with the experimental ones. Load-settlement curve basically presents a quadratic function form.
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