Bina üzerine etkiyen rüzgar yüklerinin anlaşılması büyük önem taşımaktadır. Bu çalışma, rüzgar basınç dağılımlarını ve bina yüzeyindeki ve etrafındaki hız dağılımlarını incelemek için çeşitli rüzgar hızları altında farklı en-boy-yükseklik oranlarına sahip farklı basit plan geometrili binaların analizine odaklanmaktadır. Bu nedenle, ana değerlendirme kriterleri plan şekilleri, bina en-boy-yükseklik oranları, kat yüksekliği ve rüzgar hızıdır. Bu amaçla, ANSYS Fluent 20.0 Hesaplamalı Akışkanlar Dinamiği yazılım paket programı analiz için kullanılmaktadır. Çalışma sonucunda, genişlik/yükseklik oranları ve uzunluk/yükseklik oranlarının, bina planı şeklinin ve rüzgar hızının binanın rüzgar özelliklerini önemli ölçüde etkilediği görülmüştür. Plan geometrisindeki değişimin, binanın rüzgar altı yüzeyindeki basınç katsayılarında önemli bir etkiye sahip olmadığı tespit edilmiştir. Ancak plan şeklindeki değişiklikler veya en-boy-yükseklik oranlarındaki farklılıklar, binanın yan yüzeylerindeki basınç katsayılarında kritik etkilere sahiptir. Bina uzunluğu arttıkça yan yüzeylerdeki basınç değerleri de artmıştır. Öte yandan, bina en-boy-yükseklik oranlarının basınç değerleri üzerinde önemli etkileri olduğu görülmüştür. En kritik basınç değerleri, uzunluk oranı 6.0 ile en yüksek uzunluk oranına sahip D4 kodlu modelin rüzgar üstü yüzeyinde ve yan yüzeylerinde görülmüştür.
This study researches a numerical analysis of pressure distributions of wind on irregular buildings over wind angles of 0° and 180° with different projection ratios(PR). Wind is an important design parameter that should be considered at the initial part of the design phase in terms of energy potential. For this reason, wind effects in building design is extensively analyzed in this study. The study aims to analyze the effect of irregular building form, projection ratios, the re-entrant corner distances and wind incidence angles on the wind flow and on pressure distributions of wind at all surfaces. Design/Methodology/Approach Two L-shaped and T-shaped building models which have the identical building area and building height but have different projection ratios were analyzed by Computational Fluid Dynamics (CFD) of ANSYS. In line with the aim, pressure distributions of wind on and around various irregular buildings are analyzed for the same height level. Model dimensions were reduced to 1/100 scale to save computing time. FindingsFrom the study, it has been noticed that the plan shape, projection ratios, distances from the reentrant corner, considerably influence the wind behavior of buildings. It was noticed that when projection ratio decreased to half, the negative pressure values two times greater in L and T models. When L and T models with the same building area are compared, the highest negative pressure was seen in the L model with the highest projection ratio PR (0.80). In all T models, the highest negative pressure coefficients were noticed on D and F surfaces for both wind angles. In all L models, the highest negative pressure coefficients were found on F surface for both wind angles. Originality/ValueStudies on the effects of wind on the building are generally seen as an engineering problem. There are limited number of studies on this subject in architecture. However, this is an issue that needs to be investigated, which also concerns architecture. There are many studies in the literature on the wind behavior of irregular buildings. However, projections in plan and distances from the re-entrant corner's effect on pressure coefficients were not be studied comprehensively. The obtained results from the CFD analysis will provide extensive information related to wind effects on buildings. this resource will create awareness about wind for architects and architecture students and can be used as a resource in the design phases.
Purpose This paper presents the numerical examination of wind pressure distributions on U-plan shaped buildings having four different depth ratios (DR) as 0.5, 1, 2 and 4 over wind incidence angle (WIA) of 0°. The purpose of this study is to investigate the effect of irregular building form, DRs, distances from the reentrant corner, wind velocity values on and around wind pressure distributions of the buildings. With this aim, ANSYS Fluent 20.0 Computational Fluid Dynamics (CFD) program is used for the analysis. Design/methodology/approach Four U-shaped buildings having the same height, width and wing length but having different DR in plan were analyzed by the application of CFD package of ANSYS 20. With this purpose, wind pressure distributions on and around U-plan shaped buildings were analyzed for the wind velocity values of 2 and 5 m/s over WIA of 0°. Comprehensive results were obtained from the analyses. Findings While the change in the DR values did not create a significant change in positive pressure coefficients on A and E surfaces, negative pressure values increased as the DR decreased. The negative pressure coefficients observed on the A and E surfaces become higher than the positive pressure coefficients with the decrease in the DR. On contrary to that condition, with the decrease in the DR, G surfaces take higher positive pressure coefficients than the negative pressure coefficients. The reason for this is that the DR decreases and negative pressure values on G surface significantly decrease. The effect of the DR on the pressure coefficients is remarkable on B and D surfaces. The negative pressure coefficients on the B and D surfaces tend to increase as the DR decreases. Research limitations/implications This study focused on DRs and wind velocity values effect on pressure coefficients to limit variables. Different building wing dimensions did not take into account. Originality/value Although there are a number of studies related to wind behavior of irregular plan shaped buildings, irregular building forms have not been extensively investigated parametrically, especially in terms of the effect of DR on wind pressures. This study is therefore designed to fill this gap by analyzing impacts of various parameters like building shape with various DRs, WIA and wind velocity values on wind pressure distributions and velocity distributions on and around the building.
Wind is a significant architectural design parameter to be considered during the initial phase of the design stage. However, there are very few studies on the wind behaviour of buildings in the architectural field. Understanding the behaviour of buildings under wind loads is significant to developing solutions at every stage of the design phase. This study presents the numerical examination of wind pressure distributions on U-plan-shaped buildings with four different depth ratios of 0.5, 1, 2, and 4 over a wind incidence angle of 0°. Models were examined with 2 and 5 m/s wind velocity values. This study aims to examine the effect of depth ratios and wind velocity values on an irregular building. Wind pressure distributions around models, wind velocity distributions, wind flows and streamlines have been comprehensively evaluated. As a result of the studies, it has been observed that according to the wind pressure distributions around building models, when the U1, U2 and, U7, U8 models are compared, it can be seen that the negative pressure difference decreases slightly as the depth ratio decreases. Furthermore, as the wind velocity increased, the negative pressure difference decreased. It was observed that there was no significant difference in terms of positive pressure values. Moreover, it was observed that from the height level of H/3 to 2H/3, the vortex region decreases. This vortex area is more significant in the U7 model, which has a depth ratio of 0.5. The vortex area increases as the depth ratio decreases.
Nowadays, due to the decrease in renewable energy sources on a global scale, studies for the effective use of energy and reducing energy consumption gain importance. Buildings have an extremely important role in energy consumption. Educational buildings, which are used for educational purposes, are important in terms of both the duration of use and the comfort level of the user. While the aim in educational institutions is to increase the level of user comfort, the main target is to increase the efficiency in educational activities. In energy consumption, the rate of consumption due to lighting is quite high. For this reason, effective and appropriate design of natural and artificial lighting is important in terms of both user efficiency and minimizing energy consumption. In lighting design, natural and artificial lighting should be considered in an integrated manner. The design should be started by considering daylight as the primary energy source. The homogeneous distribution of light in the space is as important as the average illumination level in the classroom. The light should spread homogeneously in the space in a way that provides equal efficiency to every user. In this study, the illuminance level of a selected classroom in Niğde Ömer Halisdemir University Faculty of Architecture was analyzed. In the selected workshop, measurements were made in the 5 weeks selected in November and December, at different times of the day and in different sky conditions, when the artificial lighting elements were on and off. In the case of the lamp on, generally sufficient average illuminance level can be met in all measurement hours, while it has been observed that sufficient average illuminance level is provided by turning on the lamps in the cloudy sky condition.
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