Showing papers by "Qiusheng Li published in 2020"
TL;DR: In this article, a comparative evaluation of the onshore and offshore wind characteristics and their wind energy potentials in the southeast coastal region of China is presented, where the Weibull distribution function is verified to be a reliable model for both on-shore and off-shore wind speed predictions.
61 citations
TL;DR: In this paper, the effects of corner chamfers on the aerodynamic performance of tall buildings were investigated and correlation factors for base moment coefficients and power spectral densities were proposed.
35 citations
TL;DR: In this paper, the authors present an observational study of wind characteristics during Super Typhoon Mangkhut and aim to enhance the understanding of the boundary layer wind structure of strong typhoons over land.
34 citations
TL;DR: Wang et al. as discussed by the authors presented a case study on super typhoon Mangkhut (1822), which is one of the strongest TCs impacted south coastal region of China, and analyzed a set of valuable database from various devices, i.e., weather satellites, radiosonde balloons, wind profilers and ground-based weather masts, which covers the entire TC depth.
29 citations
TL;DR: In this article, structural dynamic characteristics and wind-induced responses of a 600m-high skyscraper installed with an active tuned mass damper (ATMD) system during wind storm were analyzed.
Abstract: This paper presents observations of structural dynamic characteristics and wind-induced responses of a 600-m-high skyscraper installed with an active tuned mass damper (ATMD) system during ...
28 citations
TL;DR: In this article, a numerical weather prediction (NWP) model with 2-km-spatial and 1-h-temporal resolution in conjunction with observations, spatiotemporal analysis of offshore wind field characteristics and energy potential in Hong Kong is presented.
26 citations
TL;DR: In this article, a 6-year continuous anemometric data was used to analyze the fractal dimension of wind speed time series recorded under various terrain conditions based on box-counting method.
23 citations
18 citations
TL;DR: In this paper, a field measurement facility for the WDR on a gable-roofed low-rise building with overhang has been established and implemented in a typhoon-prone region of China.
17 citations
16 citations
TL;DR: For high-rise buildings subjected to ambient excitations such as typhoons and earthquake actions, their structural responses may include non-stationary features as mentioned in this paper, and traditional traditional features may not be sufficient.
Abstract: For high-rise buildings subjected to ambient excitations such as typhoons and earthquake actions, their structural responses may include non-stationary features. Under such conditions, traditional ...
TL;DR: In this paper, the authors present an observational study on the wind characteristics of Typhoon Hato which made landfall with an intensity of severe typhoon at a distance of ~90 km from the tower on Aug. 23, 2017.
TL;DR: In this paper, a light detection and ranging (Lidar) system at an offshore platform in Hong Kong was examined to characterize the wind veer profiles up to a height of 180 meters.
Abstract: A proper understanding of marine wind characteristics is of essential importance across a wide range of engineering applications. While the offshore wind speed and turbulence characteristics have been examined extensively, the knowledge of wind veer (i.e., turning of wind with height) is much less understood and discussed. This paper presents an investigation of marine wind field with particular emphasis on wind veer characteristics. Extensive observations from a light detection and ranging (Lidar) system at an offshore platform in Hong Kong were examined to characterize the wind veer profiles up to a height of 180 m. The results underscored the occurrence of marine wind veer, with a well-defined two-fold vertical structure. The observed maximum wind veer angle exhibits a reverse correlation with mean wind speed, which decreases from 2.47° to 0.59° for open-sea terrain, and from 7.45° to 1.92° for hilly terrain. In addition, seasonal variability of wind veer is apparent, which is most pronounced during spring and winter due to the frequent occurrence of the low-level jet. The dependence of wind veer on atmospheric stability is evident, particularly during winter and spring. In general, neutral stratification reveals larger values of wind veer angle as compared to those in stable and unstable stratification conditions.
TL;DR: In this paper, the authors analyzed long-term wind speed data recorded at various offshore stations and found that the mean fractal dimension varies from 1.31 at an offshore weather station to 1.43 at an urban station, which is mainly associated with surface roughness condition.
Abstract: Proper understanding of offshore wind speed variability is of essential importance in practice, which provides useful
information to a wide range of coastal and marine activities. In this paper, long-term wind speed data recorded at various offshore stations
are analyzed in the framework of fractal dimension analysis. Fractal analysis is a well-established data analysis tool, which is particularly
suitable to determine the complexity in time series from a quantitative point of view. The fractal dimension is estimated using the
conventional box-counting method. The results suggest that the wind speed data are generally fractals, which are likely to exhibit a persistent
nature. The mean fractal dimension varies from 1.31 at an offshore weather station to 1.43 at an urban station, which is mainly associated
with surface roughness condition. Monthly variability of fractal dimension at offshore stations is well-defined, which often possess larger
values during hotter months and lower values during winter. This is partly attributed to the effect of thermal instability. In addition, with an
increase in measurement interval, the mean and minimum fractal dimension decrease, whereas the maximum and coefficient of variation
increase in parallel.
TL;DR: In this paper, the authors investigated wind-induced pressures on an instrumented low-rise building with gable roof and roof overhang during Typhoons Mujigae and Sarika by means of full-scale measurements.
Abstract: This study investigated wind-induced pressures on an instrumented low-rise building with gable roof and roof overhang during Typhoons Mujigae and Sarika by means of full-scale measurements....
TL;DR: An optimal procedure for the wind-resistant design of tall buildings is presented, which aims to minimize the total weight of the designed building subject to the constraints of top acceleration and lateral drifts.
TL;DR: In this paper, free vibrations of functionally graded (FG) graphene-reinforced composite blades with varying cross-sections are investigated considering the cantilever boundary conditions, the free vibrations are investigated.
Abstract: In this paper, free vibrations of functionally graded (FG) graphene-reinforced composite blades with varying cross-sections are investigated. Considering the cantilever boundary conditions, the dyn...
TL;DR: In this article, eight L-shaped rigid models with different geometric dimensions were tested at four typical terrain categories in a boundary wind tunnel to investigate the characteristics of wind pressures on L-shapes.
Abstract: Eight L-shaped rigid models with different geometric dimensions were tested at four typical terrain categories in a boundary wind tunnel to investigate the characteristics of wind pressures on L-sh...
TL;DR: In this article, a number of squall line passages over the Pearl River Delta (PRD) are documented for the first time based on the wind data collected by a 356 m-high meteorological tower with high temporal resolution (10 Hz).
Abstract: A number of squall line passages over the Pearl River Delta (PRD) are documented for the first time based on the wind data collected by a 356 m-high meteorological tower with high temporal resolution (10 Hz). The mean wind and turbulence characteristics are studied based on a sample of six cases. The mean wind profile is consistent with the international standard for wind engineering, but the turbulence intensity profile has quite significant deviations. Moreover, the energy spectrum of the fluctuating wind is found to be consistent with the −5/3 law, as expected in the inertial subrange. For the purpose of wind gust nowcasting, the performance of a nowcasting algorithm based on upper air wind and thermodynamic profiles is examined using the limited dataset. The results highlight that the mean wind gust estimates are sufficient to nowcast the surface wind gust as measured by the anemometers, but for an extreme squall line case, the maximum wind gust estimates would be useful. The information in this paper is believed to be useful for wind engineering applications and weather nowcasting for wind gusts associated with subtropical squall lines, and, to the best of the authors’ knowledge, this is the first study of its kind for the PRD region.
TL;DR: The reference wind speed and reference static pressure are two key parameters for determining the testing results of wind tunnel experiments as mentioned in this paper, and the values of these parameters can be used to determine the test results.
Abstract: The reference wind speed and reference static pressure are two key parameters for determining the testing results of wind tunnel experiments. Traditionally, the values of these parameters can be de...
TL;DR: In this paper, the dynamic properties of seven supertall buildings that are currently among the world's 30 tallest are evaluated using field measurements collected during tropical cyclone events, including hurricanes and floods.
Abstract: The dynamic properties of seven supertall buildings that are currently among the world’s 30 tallest are evaluated using field measurements collected during tropical cyclone events. In this ...
TL;DR: In this article, a standardization scheme for surface wind speed measurements at coastal islands is proposed, which takes into account the combined effects associated with topography and speed dependence of marine roughness z 0 m.
TL;DR: The transport of inflow wind turbulence and the aerodynamics of the BARC model are evaluated by large-eddy simulation based on high-order flux reconstruction (FR) numerical schemes in combination with an inflow turbulence generation method called DSRFG.
TL;DR: In this paper, the effect of gap width on buffeting force coherence and aerodynamic admittance of a twin-box bridge deck with four different gap widths was investigated.
TL;DR: Based on numerical simulation and wind tunnel testing, the wind loads and wind speed amplifications on high-rise buildings with openings are investigated in detail in this article, where the mean wind pressure coefficients and the wind flow characteristics were obtained.
Abstract: High-rise buildings are very sensitive to wind excitations, and wind-induced responses have always been the key factors for structural design. Facade openings have often been used as aerodynamic measures for wind-resistant design of high-rise buildings to meet the requirement of structural safety and comfort. Obvious wind speed amplifications can also be observed inside the openings. Therefore, implementing wind turbines in the openings is of great importance for the utilization of abundant wind energy resources in high-rise buildings and the development of green buildings. Based on numerical simulation and wind tunnel testing, the wind loads and wind speed amplifications on high-rise buildings with openings are investigated in detail. The three-dimensional numerical simulation for wind effects on high-rise building with openings was firstly carried out on FLUENT 15.0 platform by SST k − e model. The mean wind pressure coefficients and the wind flow characteristics were obtained. The wind speed amplifications at the opening were analyzed, and the distribution law of wind speed in the openings is presented. Meanwhile, a series of wind tunnel tests were conducted to assess the mean and fluctuating wind pressure coefficients in high-rise building models with various opening rates. The variation of wind pressure distribution at typical measuring layers with wind direction was analyzed. Finally, the wind speed amplifications in the openings were studied and verified by the numerical simulation results.
TL;DR: In this article, a short-range LIDAR (SRL) was used to study building-induced turbulence at Hong Kong International Airport (Hong Kong) and the potential impact on a landing aircraft is examined and compared to flight data.
Abstract: Building-induced turbulence may affect aviation safety, e.g. when the aircraft is about to land at an airport. Observations of such flow have been conducted at the Hong Kong International Airport using short-range LIDAR (SRL). Statistical analysis of the radial velocity, namely, the longitudinal structure function, is described herein. It is found that the classical Kolmogorov theory for homogeneous turbulence applies to LIDAR observations of building-disrupted airflow. Some distinctive features of the turbulent flow are also discussed, notably velocity streaks and tiny anticyclones at the hectometer scale. The potential impact on a landing aircraft is examined and compared to flight data. The results in this paper could be useful for studying building-induced turbulence at other airports around the world.