Analysis of Wind Load Effect on the Roof of Low-Rise Building in the Mountain Terrain

2011 ◽  
Vol 382 ◽  
pp. 176-182
Author(s):  
Xing Qian Peng ◽  
Ling Lin Shi
Keyword(s):  
Structural Damage ◽  
Wind Load ◽  
Wind Pressure ◽  
Practical Significance ◽  
Sine Function ◽  
Negative Effects ◽  
Load Effect ◽  
Ansys Cfx ◽  
Mountain Terrain ◽  
The Hill

The wind conditions of the low-rise building in the mountain terrain are different because they have the characteristics of different landforms. When the typhoon comes, the possibility of structural damage is increasing by the negative effects of wind in the special topography. By establishing a sine function of outline of the hill, this paper makes a CFD(Computational Fluid Dynamics) numerical simulation about the low-rise building around the hills with four different height. Using ANSYS-CFX software as calculating platform, it put forward the roof wind load effect of the Low-rise building by study the characteristics of the hill, the law of wind pressure distribution and the influence to roof wind load by wind direction and the high of the hill, the conclusions which can provide a reference for wind-resistant design have practical significance.

Determination of Basic Wind Velocity for Wind Load-Governed Limit State

2019 ◽  
Author(s):  
Ji Hyeon Kim ◽  
Hae-Sung Lee
Keyword(s):  
Wind Velocity ◽  
Reliability Index ◽  
General Procedure ◽  
Limit State ◽  
Wind Load ◽  
Wind Pressure ◽  
Load Factor ◽  
Load Effect ◽  
Design Life ◽  
Target Reliability Index

<p>This paper proposes a general procedure for evaluating a nominal value of wind velocity for a wind load- governed limit state to secure a target reliability index during the design life of a structure. The nominal value of wind velocity, referred to as a basic wind velocity, and wind load factor should be determined so that the factored wind load effect secures a target reliability index for a wind load-governed limit state. In this study, the analytical form of the return period of the basic wind velocity is expressed as a function of the target reliability index, wind load factor, and statistical parameters of wind pressure, which are derived as linear functions of the coefficient of wind velocity. The proposed approach is applied to the Korean Highway Bridge Design Code-Cable supported Bridge, which specifies the design life of a structure as 100- and 200-year.</p>

scholarly journals Analysis of Wind Load Effect on C-Shape Tall Building with and Without Shear Wall

2021 ◽  
Vol 9 (10) ◽  
pp. 566-572
Author(s):  
Mr. Ankur Srivastava
Keyword(s):  
Shear Wall ◽  
Wind Load ◽  
Tall Building ◽  
Wind Pressure ◽  
Wind Force ◽  
Comparative Result ◽  
Load Effect ◽  
Story Drift ◽  
Codal Provisions

Abstract: Since land is scarce in metropolitan locations, it's common for tall building to be erected in C form. With the use of software ETABS 2019, this study examines the features of wind-induced story displacement and story drift operating on tall Cshaped models, with and without shear wall. Also, empirical formulae are used for manual calculations and to obtain the wind force and designed wind pressure on C-shaped tall building using codal provisions of IS 875 (Part 3) : 2015, also its applicability has been validated by a case study. For tall C-shaped buildings, this study gives a comparative result on the effect of wind load on building, with & without shear wall on behalf of maximum story displacement and story drift. Keywords: Plan irregularity, shear wall, wind load, ETABS 19

Analysis of Wind Load Effect on Ship Loader in Shipping Process

2013 ◽  
Vol 770 ◽  
pp. 155-158
Author(s):  
Meng Long Zhou ◽  
Bin Lin ◽  
Xu Zhang ◽  
Xiao Feng Zhang ◽  
Peng Fei Liu
Keyword(s):  
Dynamic Analysis ◽  
Static Load ◽  
Wind Load ◽  
Wind Pressure ◽  
Analysis Method ◽  
Load Effect ◽  
Turbulent Wind ◽  
Analysis Process ◽  
Sea Wind ◽  
Random Vibration Analysis

Research about sea wind load effect on ship loader is completed in this paper. Entity modeling method and solid element is used in the process of finite element modeling. Sea wind is divided into the steady wind and the turbulent wind. The steady wind is disposed as the constant speed wind which can be converted to wind pressure. After the static load solution, modal analysis is conducted which is essential for the following dynamic analysis. Because turbulent wind has random amplitude, direction and frequency, random vibration analysis method is used in the dynamic analysis process. With the results from the three representative positions, it is concluded that the displacement size and dynamic response intensity is in direct proportion to the height of the position.

Wind Pressure and Wind-Induced Vibration of Heliostat

2008 ◽  
Vol 400-402 ◽  
pp. 935-940 ◽  
Author(s):  
Ying Ge Wang ◽  
Zheng Nong Li ◽  
Bo Gong ◽  
Qiu Sheng Li
Keyword(s):  
Dynamic Response ◽  
Wind Direction ◽  
Wind Load ◽  
Wind Pressure ◽  
Induced Response ◽  
Vertical Angle ◽  
Lateral Direction ◽  
Direction Angle ◽  
Wind Pressures ◽  
Fluctuating Wind

Heliostat is the key part of Solar Tower power station, which requires extremely high accuracy in use. But it’s sensitive to gust because of its light structure, so effect of wind load should be taken into account in design. Since structure of heliostat is unusual and different from common ones, experimental investigation on rigid heliostat model using technology of surface pressure mensuration to test 3-dimensional wind loads in wind tunnel was conducted. The paper illustrates distribution and characteristics of reflector’s mean and fluctuating wind pressure while wind direction angle varied from 0° to 180° and vertical angle varied from 0° to 90°. Moreover, a finite element model was constructed to perform calculation on wind-induced dynamic response. The results show that the wind load power spectral change rulers are influenced by longitudinal wind turbulence and vortex and are related with Strouhal number; the fluctuating wind pressures between face and back mainly appear positive correlation, and the correlation coefficients at longitudinal wind direction are smaller than those at lateral direction; the fluctuating wind pressures preferably agree with Gaussian distribution at smaller vertical angle and wind direction angle. The wind-induced response and its spectrums reveal that: when vertical angle is small, the background responsive values of reflector’s different parts are approximately similar; in addition, multi-phased resonant response occurring at the bottom. With the increase of , airflow separates at the near side and reunites at the other, as produces vortex which enhances dynamic response at the upper part.

scholarly journals Comparative Study for the Prediction of Cavitating Flow inside a Square-Edged Orifice using Different Commercial CFD Software

2019 ◽  
Vol 128 ◽  
pp. 06003
Author(s):  
Gong-Hee Lee ◽  
June-Ho Bae
Keyword(s):  
Structural Damage ◽  
Nuclear Power ◽  
Cavitating Flow ◽  
Regulatory Body ◽  
Reactor Operation ◽  
Flow Acceleration ◽  
Service Testing ◽  
Ansys Cfx ◽  
Rapid Flow ◽  
Computational Fluid Dynamics Cfd

Nuclear power plant operators conduct in-service testing (IST) to verify the safety functions of safety–related pumps and valves and to monitor the degree of vulnerability over time during reactor operation. The system to which the pump and valve to be tested are installed has various sizes of orificesfor flow control and decompression. Rapid flow acceleration and accompanying pressure drop may cause cavitation inside the orifice, which may result in orifice degradation and structural damage. Though licensing applications supported by using Computational Fluid Dynamics (CFD) software are gradually increasing for IST–related problems, there is no CFD software which obtains a licensing from the domestic regulatory body until now. In this paper, to assess the prediction performance of different commercialCFD software for the analysis of cavitating flow inside a square–edged orifice, the simulation was conducted with ANSYS CFX and FLUENT R18.1. The results predicted were then compared with the measured data.

scholarly journals A stochastic approach for the wind load effect on steel structures

2016 ◽  
Vol 69 (2) ◽  
pp. 137-145 ◽  
Author(s):  
Thiago Dias dos Santos ◽  
Gustavo Henrique Siqueira ◽  
Luiz Carlos Marcos Vieira Junior
Keyword(s):  
Steel Structures ◽  
Stochastic Approach ◽  
Wind Load ◽  
Load Effect

INTERNAL FORCES IN THE FRAME OF BUILDING OF PRISMATIC FORM UNDER DIFFERENT DISTRIBUTION OF WIND PRESSURE

2021 ◽  
Vol 97 (5) ◽  
pp. 31-39
Author(s):  
V.S. KUZNETSOV ◽  
◽  
A.A. SHURUSHKIN ◽  
Keyword(s):  
Russian Federation ◽  
Research Method ◽  
Relevant Information ◽  
Wind Load ◽  
Building Codes ◽  
Wind Pressure ◽  
Regulatory Documents ◽  
Internal Forces ◽  
The Russian Federation ◽  
Graphic Interpretation

The features of the effect of wind on a prismatic-type building with different methods of determining the coefficient of wind pressure along the height are considered. The study was carried out on the basis of studying the main provisions of regulatory documents governing design and development activities in the Russian Federation, as well as current publications of domestic and foreign scientists, corresponding to research in this area. The research method is structural and analytical analysis using the correlation dependences of the factors under study. Analytical dependencies for determining the wind forces for various methods of assigning the wind load coefficient along the height of the building and their graphic interpretation are given. The work is based on the provisions of domestic building codes and relevant information contained in other domestic and foreign sources. For prismatic buildings with a height of up to 80 meters, there are areas where the forces from the main wind load significantly depend on the method of its determination. The conducted research indicates the ambiguity used in the practice of designing the parameters of the wind load, allowing the possibility of excess or underloading of structures or individual elements.

scholarly journals Component Combination Rules of Wind Load Effects of Building Structures

2020 ◽  
Vol 10 (24) ◽  
pp. 8775
Author(s):  
Haiwei Guan ◽  
Yuji Tian
Keyword(s):  
Extreme Values ◽  
Simulation Method ◽  
Wind Load ◽  
Combination Method ◽  
Wind Effect ◽  
Building Structures ◽  
Combination Rules ◽  
Load Effect ◽  
Mean Values ◽  
Standard Deviations

Under the action of the same wind azimuth, the extreme values of the wind load effect components of building structures are generated in the along-wind, cross-wind, vertical, and torsional directions. In designing the wind-resistant structure, the extreme values of effect components need to be combined to determine the internal force envelope values of members. Complete quadratic combination (CQC) and Turkstra combination rules are often used to determine the combination value of extreme values of wind effect components. The extreme probability distribution expressions of the CQC, and the Turkstra and approximate rules, are derived. The simplified combination Equations and combination coefficients of the CQC and Turkstra approximate rules are proposed in this paper. We use the combination Equations and Monte Carlo simulation method to analyze the accuracy of Turkstra and its approximate rules. The results show that the combination extreme is associated with the correlation coefficients, mean values, ratios of standard deviations, and fluctuating extremes of effect components. The errors between Turkstra and its approximate rules are small when load effect components show a positive correlation. The errors are largest when the standard deviations of components are equal. Our research results provide a theoretical basis for the combination method of wind load effect components of building structures.

Optimization of an External Gear Pump using Response Surface Method

2020 ◽  
Vol 36 (4) ◽  
pp. 567-575
Author(s):  
A. Abdellah El-Hadj ◽  
Shayfull Zamree Bin Abd Rahim
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Rotation Speed ◽  
Design Stage ◽  
Pump Efficiency ◽  
Gear Pump ◽  
Negative Effects ◽  
Surface Method ◽  
Ansys Cfx ◽  
Two Parameters

ABSTRACTDesign of a new gear pump requires many considerations to get good pump efficiency. In order to achieve optimal results, all parameters must be optimized from the design stage. In this study, ANSYS CFX was used to make parametric analysis in order to optimize a new design of gear pump. Two parameters which are inlet diameter and rotation speed are considered. The response surface method gives an optimum design point for inlet diameter of 15mm and rotation speed of 3500 rev/min. Twin vortices are created in the inlet and the outlet of pump, which strangle the flow. In order to reduce their negative effects on the flow, fillets are created at the inlet and the outlet of the pump.

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