Numerical Analyses of Hygrothermal Durability Performances on Multi-dimensional Composite Building Envelopes with Metalic Elements

金属元素多维复合建筑围护结构湿热耐久性能的数值分析

• 批准号: 13650652
• 负责人: SHIBAIKE Hideki
• 金额: $ 2.3万
• 依托单位: Kyoto Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650652/
• 关键词: Steel elements; Exterior insulation; Vented cavity; Boundary Element method; Corrossion prediction; ISO 9223 standard; SUS pillar; Alminum cladding; 発錆・腐食侵攻予測モデル; 鉄骨建築壁体; 二重相反法; 熱・水分・空気同時移動問題; 海塩相当付着量; 一定境界要素; 半解析的積分; 2次式; 2次元

In order to provide high performance building envelopes as a counter measure against the climate change issues, a durability assessment of composite steel walls are the one of the important engineering challenges to be solved in ner future, It should be required a jointed technology of numerical simulation procedures for the long term hygrothermal performances on building envelopes with metallic elements and corrosion performance predictions on them.In this investigation, we have developed a numerical procedure to predict both hygrothermal and corrosion performances for multi-dimensional composite building envelopes with metallic elements. Multi dimensional heat, air and moisture transfer has been formulated by the boundary element techniques. Numerical evaluation procedures were proposed for boundary integrals and domain integrals with both numerical efficiency and accuracy. A simple and robust procedure to describe boundaries and interfaces for arbitrarily connected heterogeneous bod … More ies has been described which can reduce computational resources for pivoting coefficients for solving the system of equations. Couples of simple thermal problems have been analysed as numerical demonstrations.In the sixth chapter, in situ monitored experimental data on the real scaled exterior insulation wall with vented cavity has been analysed in order to demonstrate usefulness and applicability of the proposed method for hygrothermal and corrosion performances. The monitored wall with vented cavity devised aluminum exterior cladding supported by SUS pillars. The differences on thermal performances and moisture and corrosion performances as well, have been evaluated. The merging these monitored data can create important opportunity to compare and validate the whole numerical procedure. Besides it also provide opportunity for experimental evaluations on following aspects : (1) Hygrothermal performances of a vented cavity wall, (2) the air flow and dehumidification characteristics of the cavity, and (3) improving thermal and economical performance of pillars fabricated by stainless-steel or aluminum which support the finish layer. In this paper, the experimental setup and the measurement plan are described and measured data on recent hygrothermal situations of wall systems are presented. Less

为了提供高性能的建筑围护结构作为应对气候变化问题的措施，组合钢墙的耐久性评估是未来需要解决的重要工程挑战之一。金属构件建筑围护结构长期湿热性能的数值模拟与腐蚀性能预测需要一种联合技术，研究，我们已经开发了一个数值程序来预测湿热和腐蚀性能的多维复合材料建筑围护结构与金属元素。用边界元法建立了热、气、湿的多维传递方程。提出了边界积分和区域积分的数值计算方法，兼顾了计算效率和计算精度。描述任意连接异构体边界和界面的一个简单而鲁棒的方法 ...更多信息 已经描述了可以减少用于求解方程组的旋转系数的计算资源的IES。第六章通过对真实的缩尺开孔外保温墙体的实测数据分析，验证了本文方法的有效性和适用性。带有通风腔的监控墙设计了由SUS支柱支撑的铝制外覆层。对它们在热性能、防潮性能和腐蚀性能方面的差异进行了评价。这些监测数据的合并可以为整个数值过程的比较和验证创造重要的机会。此外，还提供了以下方面的实验评估机会：（1）通风空腔壁的湿热性能，（2）空腔的空气流动和通风特性，以及（3）改善由不锈钢或铝制成的支撑饰面层的支柱的热性能和经济性能。在本文中，实验装置和测量计划的描述和测量数据最近的湿热情况的墙壁系统。少

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• 期刊: Proc.International Symposium on Sustainable Development of Asian City Environment
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