Effects of plan dimensions on gust wind loads for high-rise buildings

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Effects of plan dimensions on gust wind loads for high-rise buildings. / Liu, Y.; Kopp, Gregory; Chen, S.-F.

In: Journal of Wind Engineering and Industrial Aerodynamics, Vol. 194, 103980, 11.2019.

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@article{e56334c1ae2f4489b0783e67c5a46584,
title = "Effects of plan dimensions on gust wind loads for high-rise buildings",
abstract = "Scale-model wind tunnel pressure measurements were carried out for rectangular-plan high-rise buildings with plan ratios ranging from 0.11 to 9. Mean, fluctuating, and peak wall pressure coefficient distributions and area-averages were investigated. In addition, comparisons with the ASCE 7–16 provisions for the Main Wind Force-Resisting System (MWFRS) were made. The results show that the plan ratio has significant effects on pressure coefficients on the leeward and side walls for plan ratios less than about 4. The largest mean base shear coefficient occurs for plan ratio of about 0.67, with large values in the range of 0.5–1, but decreasing for larger or smaller plan ratios. ASCE 7–16 mean load coefficients tend to underestimate the data, particularly because of the values on leeward walls. ASCE 7–16 also underestimates the peak load coefficients due to the value of the gust effect factor. For rigid buildings, ASCE 7–16 has a gust effect factor of 0.85, while measurements indicate that it is closer to 1 for plan ratios between 0.67 and 2. Thus, the overall mismatch between the ASCE 7–16 MWFRS loads and the measured data is due to both the mean pressure coefficients and the gust effect factor. For plan ratios below 0.67, the decrease in plan ratio tends to be favorable for the MWFRS load coefficients; while for plan ratios above 4, the effects of plan ratios on the MWFRS load coefficients are limited.",
keywords = "wind loads, building aerodynamics, high-rise buildings, structural loads, wall pressure coefficients",
author = "Y. Liu and Gregory Kopp and S.-F. Chen",
year = "2019",
month = nov,
doi = "10.1016/j.jweia.2019.103980",
language = "English",
volume = "194",
journal = "Journal of Wind Engineering and Industrial Aerodynamics",
issn = "0167-6105",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Effects of plan dimensions on gust wind loads for high-rise buildings

AU - Liu, Y.

AU - Kopp, Gregory

AU - Chen, S.-F.

PY - 2019/11

Y1 - 2019/11

N2 - Scale-model wind tunnel pressure measurements were carried out for rectangular-plan high-rise buildings with plan ratios ranging from 0.11 to 9. Mean, fluctuating, and peak wall pressure coefficient distributions and area-averages were investigated. In addition, comparisons with the ASCE 7–16 provisions for the Main Wind Force-Resisting System (MWFRS) were made. The results show that the plan ratio has significant effects on pressure coefficients on the leeward and side walls for plan ratios less than about 4. The largest mean base shear coefficient occurs for plan ratio of about 0.67, with large values in the range of 0.5–1, but decreasing for larger or smaller plan ratios. ASCE 7–16 mean load coefficients tend to underestimate the data, particularly because of the values on leeward walls. ASCE 7–16 also underestimates the peak load coefficients due to the value of the gust effect factor. For rigid buildings, ASCE 7–16 has a gust effect factor of 0.85, while measurements indicate that it is closer to 1 for plan ratios between 0.67 and 2. Thus, the overall mismatch between the ASCE 7–16 MWFRS loads and the measured data is due to both the mean pressure coefficients and the gust effect factor. For plan ratios below 0.67, the decrease in plan ratio tends to be favorable for the MWFRS load coefficients; while for plan ratios above 4, the effects of plan ratios on the MWFRS load coefficients are limited.

AB - Scale-model wind tunnel pressure measurements were carried out for rectangular-plan high-rise buildings with plan ratios ranging from 0.11 to 9. Mean, fluctuating, and peak wall pressure coefficient distributions and area-averages were investigated. In addition, comparisons with the ASCE 7–16 provisions for the Main Wind Force-Resisting System (MWFRS) were made. The results show that the plan ratio has significant effects on pressure coefficients on the leeward and side walls for plan ratios less than about 4. The largest mean base shear coefficient occurs for plan ratio of about 0.67, with large values in the range of 0.5–1, but decreasing for larger or smaller plan ratios. ASCE 7–16 mean load coefficients tend to underestimate the data, particularly because of the values on leeward walls. ASCE 7–16 also underestimates the peak load coefficients due to the value of the gust effect factor. For rigid buildings, ASCE 7–16 has a gust effect factor of 0.85, while measurements indicate that it is closer to 1 for plan ratios between 0.67 and 2. Thus, the overall mismatch between the ASCE 7–16 MWFRS loads and the measured data is due to both the mean pressure coefficients and the gust effect factor. For plan ratios below 0.67, the decrease in plan ratio tends to be favorable for the MWFRS load coefficients; while for plan ratios above 4, the effects of plan ratios on the MWFRS load coefficients are limited.

KW - wind loads

KW - building aerodynamics

KW - high-rise buildings

KW - structural loads

KW - wall pressure coefficients

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85071666710&partnerID=MN8TOARS

U2 - 10.1016/j.jweia.2019.103980

DO - 10.1016/j.jweia.2019.103980

M3 - Article

VL - 194

JO - Journal of Wind Engineering and Industrial Aerodynamics

JF - Journal of Wind Engineering and Industrial Aerodynamics

SN - 0167-6105

M1 - 103980

ER -