Study On Interference Effects Of Wind Loads On A Cluster Of High-rise Buildings In Longitudinal And Transverse Arrangement

The high-rise buildings in residence community usually arrange in north-south longitudinal and east-west transverse direction well-regulated. The wind loads of this kind high-rise buildings will present different distribution significantly from a single building or a few blocks of the adjacent buildings. Considering that there are more and more residence communities which are all composed of high-rise buildings such as these, so the research of typical wind load interference effect, similar to the building envelope and bearing structure design of congeneric buildings will has very important practical significance.Based on the high-rise buildings of practical engineering "the first phase of qianjiang century center" for the template, the rigid-model synchronous pressure measuring wind tunnel test is applied, which of typical sole or group towers in longitudinal and transverse arrangement. The following aspects were mainly discussed:(1)Based on the results of rigid-model synchronous pressure measuring test, the distribution character of average value and peak value of local wind pressure coefficient along the width and height is analyzed in the working condition of both sole and group pattern. Summarize the rules of the group interference effect of local wind pressure on the typical buildings surface.(2)In the typical testing floor, the property of wind loads resulting force and global body shape coefficients in different wind direction angle in both sole and group pattern are analyzed. And in certain wind direction angle, the wind load resulting force property along the height of each testing floor is discussed. On different planimetric positions, the group interference effect in longitudinal and transverse arrangement is investigated.(3)In the base, the property of wind loads resulting force in different wind direction angle in both sole and group pattern are analyzed. Comparing to the standard and the high-frequency dynamic force balance measuring test result, the integrated buildings’ interference in longitudinal and transverse arrangement is discussed. The interference factor is defined; Research the dominating mind angles of wind loads resulting force in the base and the group interference effect of typical high-rise buildings in architectural complex.Research shows that in different parts of the building group have different wind loads interference effects. The local positive pressure of the buildings in different locations and local negative pressure (absolute value) of central building are generally tend to reduce the shielding effect. And the effect of the building in comer is smaller than the effect of central building; But the local negative pressure of comer unit building, especially extreme negative pressure will appear the phenomenon of the absolute value increasing because of local channeling effect. The floors’ wind loads (or body shape coefficients) and basal wind loads of central building is less than or close to the monomer situation. But the basal torque maybe appear the phenomenon of the wind loads increasing; The wind loads of comer unit building in the dominating wind angle or neighboring wind angle will appear a certain degree of enhancement.