Papers by Keyword: Wind Load

Abstract: Shear wall system is used as one of the most lateral load resisting systems in mulit-story building. Shear wall is quite effective in resisting wind and seismic load in medium-rise and high-rise building. Shear wall provided high stiffness and strength, which can be used to resist large lateral as well as vertical load, making the performance of the building beneficial in various wind load conditions. This study has been focused on the displacement of the different lateral load resisting system for high-rise buildings under various wind load conditions. In this paper, a study was carried out by changing the locations of shear wall radically to determine the structural configuration of a multistory building accordantly. This study has been focused on the effect of addition of shear wall at different location and configuration in buildings without shear wall as well as with shear wall. Besides that, from the software results, the behavior of the shear wall with and without opening was able to observed by obtaining the lateral displacement when acted by 10kN point load at the top left of the wall. The accuracy of the software was able to verify by comparing the result obtained from ETABS and SAP2000 and it was found that the percentage difference between values obtained from that two software is below 20 percent. The maximum lateral displacement at 40m/s and 50m/s is 1.8 and 2.8 times bigger than maximum lateral displacement at 30m/s respectively. The lateral displacement of the shear wall increases as the opening size increases.

Abstract: The method of calculating the shells of revolution for an asymmetric load using a semi-analytic finite element method is considered. An example is given of calculating a corrugated cylindrical tank for wind load. Comparison of meridional and annular forces is performed for a smooth and corrugated shell of identical dimensions.

Abstract: In order to determine the failure mode of high-voltage transmission tower materials under the condition of ice-coating load in an actual line. The Qidian-Luoping 500kV wine glass type transmission tower is selected as the prototype, and the one tower with two lines model of the whole beam unit is established by using the ANSYS finite element software. The loading mode is static load considering icing load and wind load. The most unfavorable wind direction of the transmission tower is obtained by comparing and analyzing the maximum displacement and the stress of the rod under different directions of wind load in the transmission tower. Then the failure mode of transmission tower is studied by the variable ice thickness of the tower line system. The results show that the direction parallel to the cross arm is the most unfavorable direction in the transmission tower. And under the most unfavorable wind direction, with the increase of ice thickness, it is found that the tower head part is more sensitive to icing load than the tower body part. When the thickness of ice coating reaches 30mm, the weak load-bearing rod will appear locally in the transmission tower and the position of the rod is mainly distributed on the outer upper crank arm, the outer side of the ground bracket and the upper side of cross arm of the transmission tower.

Abstract: This paper presents the results of a comparison study of the internal forces applied to the structure due to wind load determined based on SNI 1727: 2013 that is inputted manually and automatically using ASCE 7-10 wind load feature in SAP2000. The wind load reviewed in this study is the wind load that calculated by following the Directional Procedure stated in SNI 1727:2013. The study shows that the wind load calculated based on SNI 1727:2013 when the internal pressure coefficient GC_pi is defined as 0.18 is 12% higher than the wind load calculated automatically by applying ASCE 7-10 wind load feature provided by SAP2000 when the wind parameters are assigned based on SNI 1727:2013.

Abstract: The dilatation of the high-rise building by inserted field is the main topic of this paper. This building contains of two “towers” with different heights (8-storey and 25-storey), which are linked by inserted field. The description of the building and applied loads are shortly mentioned. The paper is mainly focused on the importance of the dilatation and its types, the modelling of inserted field and its structural solutions. The comparisons of horizontal forces due to the wind load and seismic load are presented at the end. The solution was recalculated for four seismic areas in Slovakia, where different values of basic seismic acceleration a_r are. Also, the maximum horizontal deflections calculated for three alternatives of the building (without dilatation, with continuous dilatation 50 mm located between two “towers” passing through the foundation, with dilatation by inserted field between two “towers”) due to static wind load are presented here.

Abstract: The front cover of solar photovoltaic modules is mostly made of 3.2mm, 2mm or thinner glass. When under wind or other dynamic loading stress, the performance of the PV modules might be affected. This article analyzed data of dynamic load test on several different types of PV modules, and got the conclusion that the dynamic load stress could harm the string ribbon or interior circuits of the PV modules, and would therefore lead to capacity reduction and less insulation.

Abstract: The subject of this article is static and dynamic analysis of a tall residential building. The static part is focused on the analysis of the structure loaded by horizontal forces acting due to the effect of wind and by vertical forces of the structure`s own weight and other vertical loads. Dynamic analysis represents the behavior of the structure during seismic event and dynamic characteristics of the structure.

Abstract: The purpose of this study is to evaluate and compare the effectiveness of friction dampers and tuned mass dampers (TMD) using numerical simulations. Wind and earthquake loads are simulated on a 15-story model building structure in which a friction damper and/or a TMD are installed. The idealized one-dimensional structure with a friction damper at each story and/or a TMD at the top of the building is subjected to a simulated load, and the displacement and acceleration responses of the structure are measured. The outcomes show that a TMD is more useful to control the vibration of the building from a wind load and a friction damper is more suitable for loads created by large accelerations such as those found during seismic events. This study provides verification on the performance of friction dampers and TMDs according to each of the two load types, wind and earthquake, through numerical simulations.

Abstract: The paper presents the way of estimating the wind force acting on straight or curved elements with circular cross-section. These elements can be positioned at any angle to the wind direction. They may also be bent into the form of a torus or a helix, laid horizontally or sloped. The first part of the article briefly presents the results of the air flow computer simulations. The second part of the work shows the analytical approach to the problem, solved by decomposition of the wind velocity vector to the normal, binormal and tangent components, estimation of the pressure distribution around the elements cross-section and finally integration of the pressure over the whole surface. Because there were observed significant differences between the data obtained from the analytical and numerical method, some empirical correction functions had to be attached to the analytical equations. The last part consists of the engineering applicable advices, presented in the form of a table of coefficients.

Abstract: This study performed 2D analysis for suspension bridge to predict the bridge superstructure oscillation induced by wind load. Previous studies exhibited that a large torsional mode can be generated by continuous vertical modes in suspension bridge. However, the previous studies did not consider torsional resistance of the superstructure and unrealistic results were shown as wind speeds increasing. Therefore, this study developed a new model considering torsional resistances and predicted responses of a suspension bridge. Analysis results exhibited that vertical oscillations were transformed to the torsional oscillations. With varying torsional resistances, vertical responses were stabilized over a time. However, the rotational response amplified at resonance points. Also, it was found that the resonance of the rotational mode depended on the torsional resistance.