Modeling of wind-driven rain absorption ratio of building exterior finishing materials based on field measurements  

作　　者：Xing Hu Huibo Zhang Tianda Qian Chi Feng 

机构地区：[1]School of Design,Shanghai Jiao Tong University,Shanghai 200240,China [2]China-UK Low Carbon College,Shanghai Jiao Tong University,Shanghai 200240,China [3]School of Architecture and Urban Planning,Chongqing University,Chongqing 400044,China

出　　处：《Frontiers of Architectural Research》2024年第5期1145-1157,共13页建筑学研究前沿（英文版）

基　　金：Shanghai Municipality Natural Science Foundation(Grant No.21ZR1434400);Key Laboratory of New Technology for Construction of Cities in Mountain Area,Ministry of Education,Chongqing University,China(Grant No.LNTCCMA 20210103);National Natural Science Foundation ofChina(Grant No.51778358).

摘　　要：Wind-driven rain(WDR)constitutes a significant source of moisture for building facades,which poses considerable challenges to both the thermal insulation performance and long-term durability of walls.Prior studies have contributed significantly to the understanding of fluid behavior and moisture response of WDR upon impacting walls.However,the quantification of absorbed rainwater by the wall remains elusive.To address this gap,this study focuses on comprehending the dynamic WDR absorption behavior of various exterior finishing materials.Specifically,nine types of finishing materials were selected as research objects and conducted field measurements.The findings reveal that WDR absorption ratio is influenced by physical parameters of materials,surface waterproofing and the cumulative WDR.Leveraging multiple regression fittings,we established an empirical WDR absorption ratio calculation mode.This model serves as a valuable reference for determining building simulation parameters regarding dynamic moisture boundary conditions on the exterior surfaces of walls.By providing empirical insights into WDR absorption,our research contributes to a more comprehensive understanding of moisture behavior in building envelopes,thereby aiding in the development of effective strategies for enhancing building performance and durability.

关 键 词：Wind-driven rain Exterior finishing materials POROSITY Capillary absorption coefficient Moisture boundary 

分 类 号：TU564[建筑科学—建筑技术科学]