000022566 001__ 22566
000022566 005__ 20170724144655.0
000022566 04107 $$aeng
000022566 046__ $$k2017-07-04
000022566 100__ $$aLo, Yuan-Lung
000022566 24500 $$aAero-elastic behavior of high-rise buildings under downstream interference effects

000022566 24630 $$n7.$$p7th European and African Conference on Wind Engineering 
000022566 260__ $$bl'Association pour l'Ingénierie du Vent
000022566 506__ $$arestricted
000022566 520__ $$2eng$$aThis paper investigates the effect of the single and multiple aerodynamic modification mechanisms on the dynamic behaviour of the principal building when it is interfered by a very closely located building. During the study, aeroelastic vibration tests and high-frequency force balance tests are conducted to compare responses and wind forces in a well-simulated turbulent boundary layer flow. The principal building is manufactured with three different building configurations to represent the single and multiple aerodynamic modification treatments; the neighbouring building which produces interference effects is made as a square prism model. Results show that the multiple modification treatment is efficient in reducing wind forces in all interference location series. However, it is also found that in some critical conditions, such treatment is sensitive to reduced velocity and may amplify the interference effect and result in larger displacements. INTRODUCTION Interference effects caused by neighbouring buildings require an improved wind load resistant design rather than those for isolated buildings. However, due to their complex nature and huge number of disturbances, the interference effects have been considered very difficult in regulation coding for practical use. The issue with the interference effects is still one of the most difficult research topics in the field of wind engineering. Over the past decades, researchers have adopted various methodologies to investigate the interference effects on overall or local wind loads of high-rise buildings. Factors that may affect the wind forces have been widely discussed, such as the approaching flow characteristics, wind directions, relative location of neighbouring buildings, cross sectional shapes and aspect ratios, Scruton numbers, Strouhal numbers, modal frequency, and mode shapes. Among these research works, square or rectangular prisms, as well as cylindrical prisms, chimneys, storage tanks, or cladding structures were commonly chosen for discussions. In most cases, interference effects were discussed based on the evaluation of distorted wind forces to indicate critical interference locations. However, it has been pointed out that different critical interference mechanisms could occur at certain interference locations, either at the upstream or the downstream, to generate significant responses (Bailey and Kwok, 1985;

000022566 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022566 653__ $$a

000022566 7112_ $$a7th European and African Conference on Wind Engineering$$cLiège, BE$$d2017-07-04 / 2017-07-07$$gEACWE2017
000022566 720__ $$aLo, Yuan-Lung$$iYoshida, Akihito$$iKim, Yong Chul
000022566 8560_ $$ffischerc@itam.cas.cz
000022566 8564_ $$s4500506$$uhttps://invenio.itam.cas.cz/record/22566/files/101.pdf$$yOriginal version of the author's contribution in proceedings, id 101, section .
000022566 962__ $$r22493
000022566 980__ $$aPAPER