Integrated structural and energy building retrofit by reinforced concrete wall addition  

作　　者：Baixi Chen You Dong 

机构地区：[1]Department of Mechanical Engineering,University of Wisconsin-Madison,1513 University Avenue,Madison,WI 53706,USA [2]Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China [3]Research Institute for Smart Energy,The Hong Kong Polytechnic University,Hung Hom,Hong Kong,Kowloon,China

出　　处：《Low-carbon Materials and Green Construction》2024年第1期395-404,共10页低碳材料与绿色建造(英文)

摘　　要：In light of the paramount considerations of environmental sustainability and the protection of both life and property,a significant number of existing reinforced concrete(RC)buildings fall short of meeting contemporary standards in terms of their structural and energy performances.In response to these pressing concerns,there is an imperative need for comprehensive building retrofitting processes that integrate both structural and energy considerations.One such approach,the addition of RC walls,is commonly employed as a structural retrofitting technique.However,its potential to enhance overall building efficiency has been relatively underexplored in previous research.In this study,we focus on a representative RC building and utilize two key performance indices:structural residual life and energy consumption,to comprehensively evaluate the impact of RC wall retrofitting on both structural and energy performance.Our investigation considers retrofitting on both the exterior and interior sides of the building.It is observed that the structural performance exhibits notable improvement with the addition of RC walls on either side,and this improvement becomes even more pronounced when complemented by local retrofits to adjacent beams.While the RC walls added on the interior side have negligible impact on the building energy efficiency,those installed on the exterior side could obviously reduce the energy consumption of the HVAC system by 7.9%.Hence,the outcomes of this study indicate that employing the RC wall retrofitting on the exterior side of the existing building is an efficient way to reach structural and energy performance targets simultaneously.考虑到环境可持续性和保护人民生命财产安全,许多现有的老旧钢筋混凝土建筑在结构安全和能源效率方面都不符合现行标准。针对这一问题,亟需综合考虑结构和能源效率因素的全面建筑修缮工艺。增建钢筋混凝土墙是一种常见的结构修缮技术,但其对提升建筑整体能源使用效率的作用在以往的研究中却少有探索。因此,本研究将以一座代表性的钢筋混凝土建筑为例,考虑建筑内部和外侧两个改造位置,采用结构剩余寿命和建筑能耗两个关键指标全面评估该修缮技术对建筑结构和能源效率的影响。研究结果表明,在建筑内部和外侧增建钢筋混凝土墙均使结构性能得到了显著改善,在此基础上,对相邻梁进行局部加固,性能提升效果更加明显。在建筑内部增建钢筋混凝土墙对建筑能源效率的影响较小,但在建筑外侧增建钢筋混凝土墙可以显著降低建筑7.9%的暖通空调系统能耗。因此,在现有建筑物的外侧增建钢筋混凝土墙是同时提升其结构安全性和能源使用效率的有效方式。

关 键 词：Building retrofit RC wall addition Energy efficiency Structural safety 

分 类 号：TU3[建筑科学—结构工程]