Showing papers by "Qiusheng Li published in 2019"
TL;DR: In this article, a new dynamic model based on the shell theory is presented to investigate the vibration behavior of a rotating composite laminated blade with a pre-twisted angle, where the effects of the Coriolis and centrifugal forces due to the rotation motion of the blade are considered in the formulation.
45 citations
TL;DR: In this article, an empirical formula for determining the 3D aerodynamic admittance of a streamlined bridge deck is proposed based on the extensive results of the experimental data and analysis, and the correlation between the fluctuating pressures on a crosswise section and the coherences of the buffeting force along the spanwise direction of the models are investigated.
34 citations
TL;DR: In this paper, the authors investigated the aerodynamic characteristics of a long-span cable-stayed bridge girder during the erection stage and found that the drag and lift-force coefficients increase with an increase in the angle of attack.
26 citations
TL;DR: In this article, the atmospheric boundary layer and wind effects on a 600 m high skyscraper during a landfall typhoon are presented and discussed based on records from a Doppler radar wind profiler and near-ground measurements at several meteorological stations.
Abstract: This article presents the observations of the atmospheric boundary layer (ABL) and wind effects on a 600 m high skyscraper during a landfall typhoon. Wind structure and characteristics throughout the entire ABL are presented and discussed based on records from a Doppler radar wind profiler and near-ground measurements at several meteorological stations. Wind speed profiles with the feature of low-level jets and radial-distance and exposure dependences of gradient height are stressed. Afterwards, wind-induced pressures on building surfaces of the skyscraper are investigated with highlights on non-Gaussian probability distributions of negative pressures and vortex shedding occurred alternately at two sides of the building. The structural responses measured by both accelerometers and strain gauges are analyzed subsequently. Modal parameters of the skyscraper and their dependence on response amplitude are presented and discussed. This study aims to provide useful information for the wind-resistant des...
23 citations
18 citations
TL;DR: In this article, the authors present the analysis results of 18-h-long field measurement data collected at a 420m-high building and four meteorological stations in Hong Kong during the passage of Typhoon Usagi (1319) which was the most intense tropical cyclone that attacked Hong Kong in 2013.
17 citations
TL;DR: In this article, the nonlinear dynamics of a foldable multibeam structure subjected to a base excitation with one to two internal resonances are investigated, and the modulation equations for the steady state motion under this internal resonance condition are obtained by the multiple scales method.
15 citations
TL;DR: In this paper, the performance of four widely adopted micrometeorological methods and four direct modeling methods, for estimating marine surface roughness at a coastal area was examined, based on four-year measurements from an offshore platform that was equipped with LiDAR profiler, meteorological mast and other hydrologic measurement devices.
14 citations
TL;DR: This article aims to provide visual comparisons of wind effect reduction for structural designers and owners of square high-rise buildings by analyzing the effects of corner modification treatments on wind loads and wind-induced responses of these buildings.
Abstract: Although empirical formulas have been provided in relevant design code for estimating wind loads and wind-induced responses on square high-rise buildings, the effects of corner modification treatme...
14 citations
TL;DR: The beating phenomenon induced by coupling between translational modes of tall buildings with closely spaced frequencies may have significant effects on modal identification, especially for modal detection as discussed by the authors, where the beating phenomenon may be triggered by the translational mode coupling between tall buildings.
Abstract: The beating phenomenon, induced by coupling between translational modes of tall buildings with closely spaced frequencies, may have significant effects on modal identification, especially d...
13 citations
TL;DR: In this paper, the results of observed near-surface winds and wind-induced pressures on the gable roof of an instrumented low-rise building were presented, and the observations were made during the stron...
Abstract: This paper presents the results of observed near-surface winds and wind-induced pressures on the gable roof of an instrumented low-rise building. The observations were made during the stron...
TL;DR: In this article, the vertical profiles of ΔP below the outflow layer are distributed linearly with respect to altitude, with the slope increasing almost linearly in the increase of surface pressure deficit.
TL;DR: In this paper, a fluid-structure coupling model was proposed to investigate the vortex-induced vibration of a circular cylinder subjected to a uniform cross-flow, where a modified van der Pol nonlinear equation was used.
Abstract: This paper presents a fluid–structure coupling model to investigate the vortex-induced vibration of a circular cylinder subjected to a uniform cross-flow. A modified van der Pol nonlinear equation ...
TL;DR: In this article, an observational and simulation study of a tornado event in Hong Kong that occurred in the morning of 29 August 2018 is documented in this paper, where the Doppler velocity patterns show the typical signature of a velocity couplet associated with a meso/microcyclone.
Abstract: An observational and simulation study of a tornado event in Hong Kong that occurred in the morning of 29 August 2018 is documented in this paper. Rotating airflow associated with the tornado is well captured by the Doppler velocity from a Terminal Doppler Weather Radar (TDWR) in Hong Kong. The Doppler velocity patterns show the typical signature of a velocity couplet associated with a meso/microcyclone, and for most part of its lifetime, it captures clearly the evolution with time. Weather radar echoes of those thunderstorms inducing the current tornado, as well as the meso/microcyclone itself, are also successfully reproduced in a real-time simulation by a fine-resolution numerical weather prediction (NWP) model initialised 3 hours earlier, albeit with a time lag of about 15 minutes when compared to the actual event. The model simulation displays some interesting features of the cyclone, including the vertical structure of horizontal and vertical velocities and cloud liquid water content, which are consistent with literature that accounts in other parts of the world. The vertical profile of maximum radial velocity associated with the velocity couplet also compares well between the actual weather radar observation and numerical simulation. The results in this paper could serve as an interesting reference for both meteorologists and wind engineers, also demonstrating the power of very high-resolution NWP in predicting such events in a real-time fashion.
TL;DR: The serviceability of super-tall buildings depends primarily on the wind-induced structural responses, especially accelerations as discussed by the authors, to mitigate the discomforting structural vibrations, pendulum-type t.
Abstract: The serviceability of super-tall buildings depends primarily on the wind-induced structural responses, especially accelerations To mitigate the discomforting structural vibrations, pendulum-type t
TL;DR: Wang et al. as mentioned in this paper presented an observational study on the pressure fields of tropical cyclones (TCs) at a coastal meteorological station in Hong Kong, based on 17 years' measurements from sounding balloons whose detection range covered the whole tropospheric depth.
TL;DR: In this article, a comprehensive investigation on the separated and reattaching flows over a blunt flat plate with different leading-edge shapes by means of particle image velocimetry and surf-surface simulation is presented.
Abstract: This article presents a comprehensive investigation on the separated and reattaching flows over a blunt flat plate with different leading-edge shapes by means of particle image velocimetry and surf...
TL;DR: In this paper, the effect of wind-driven rain on the large span retractable roof of a stadium and WDR-induced structural responses are investigated using the large eddy simulation (LES) method together with the Eulerian multiphase model.
TL;DR: In this paper, the authors investigated the wind protective effect of wind barriers on the Lanzhou-Xinjiang high-speed railway using wind tunnel tests, using wind barriers with different heights and porosities.
Abstract: This study aims to investigate the wind protective effect of wind barriers on the Lanzhou–Xinjiang high-speed railway using wind tunnel tests. Wind barriers with different heights and porosities we...
TL;DR: In this article, the effects of wind-driven rain on long-span bridge spans are investigated and the authors propose a model to evaluate the effect of WDR on bridge spans.
Abstract: Wind-driven rain (WDR) and its interactions with structures is an important research subject in wind engineering. As bridge spans are becoming longer and longer, the effects of WDR on long-span bri...
TL;DR: In this article, the authors evaluate coupled two-degree-of-freedom galloping oscillations of slender structures with nonlinear effects, involving coupled transverse and rotational motions.
Abstract: This paper presents evaluations of coupled two-degree-of-freedom (2DOF) galloping oscillations of slender structures with nonlinear effects, involving coupled transverse and rotational motions. The...