The boundary element analysis of hygrothermal stresses for Three-dimensional composite walls.

三维复合墙体湿热应力的边界元分析。

• 批准号: 10650588
• 负责人: SHIBAIKE Hideki
• 金额: $ 2.56万
• 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: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650588/
• 关键词: Dual reciprocity method; Constant elements; Hygrothermal stresses; Semi-analytical evaluation of integrals; Coupled Heat and Moisture transfer; Three-dimensional problems; ニ重相反法; 熱・水分弾性応力

Quantitative information on the performance of building envelope components as a function of time is severely lacking. Designing for the durability and service life of building systems has not reached a stage of maturity as many key issues have not yet been analyzed. The total performance in terms of designed life span durability requires the integration of various performances that deal with hygrothermal transport, structural loading and chemical and biological activities. Todate, limited work is available that encompasses this spectrum of multi-disciplinary activity.In this paper, a new durability model is presented as the first step towards the development of an analytical tool to assist in the design attributes/considerations of hygrothermoelasto-plasticity of building wall assemblies.1. An integrated numerical procedure is presented for hygrothermoelasto-plastic mechanical changes together with simultaneous heat and moisture transfer occurred in two dimensional composite walls. Th … More e development of an uncoupled quasistatic hygrothermoelasto-plasticity model for two dimensional composite building envelope systems is discussed. The boundary element method, using boundary integral equations for two dimensional elastic displacements and stresses is presented. Domain integrals related to hygrothermal body forces were converted into equivalent boundary integrals using the dual reciprocity technique. Together with other innovative techniques, such as, analytical evaluations of all the boundary integrals, makes this procedure powerful, robust and easy to extend to fully nonlinear hygrothermoelasto-plastic.2. A three dimensional boundary element numerical procedure on simultaneous changes of heat, moisture and hygrothermoelasto-plastic stresses and displacement is developed using similar approach taken for two dimensional problems and verified its numerical precision.3. To demonstrate the capability of this model for durability analysis, an application case is presented for a building wall assembly. An English bond masonry wall system, exposed to actual weather, heat, air and moisture transport boundary conditions is analyzed. Less

关于建筑围护结构构件性能随时间变化的定量信息严重缺乏。建筑系统耐久性和使用寿命的设计还没有达到成熟的阶段，许多关键问题还没有得到分析。设计寿命耐久性方面的总性能要求综合处理湿热运输、结构载荷以及化学和生物活动的各种性能。今天，有限的工作是可用的，包括这一系列的多学科活动。在本文中，提出了一个新的耐久性模型，作为开发分析工具的第一步，以协助设计建筑墙体组件的湿热弹塑性属性/考虑因素。本文提出了二维复合材料壁面湿—热—弹—塑性力学变化与热—湿同步传递的综合数值计算方法。讨论了二维复合建筑围护结构系统的非耦合准静态湿热弹塑性模型的进一步发展。提出了用边界积分方程求解二维弹性位移和应力的边界元法。利用对偶互易技术，将与湿热体力相关的区域积分转化为等效边界积分。与其他创新技术一起，例如，所有边界积分的分析评估，使该程序强大，稳健，易于扩展到完全非线性湿热弹塑性。采用与二维问题相似的方法，建立了热、湿、湿热弹塑性应力和位移同时变化的三维边界元数值计算方法，并验证了其数值精度。为了证明该模型在耐久性分析中的能力，给出了一个建筑墙体组件的应用实例。分析了某英粘砌体墙体体系在实际天气、热、空气和水分输送边界条件下的作用。少

项目成果

Shibaike H.: "Boundary Element Analysis of Uncoupled Quasi-Static Hygrothermoelasticity for Two-Dimensional Composite Walls"ASHRAE Transaction. VOL. 104 Part 2, TO-98-13-3. 1-11 (1998)

Shibaike H.：“二维复合墙体非耦合准静态湿热弹性的边界元分析”ASHRAE 交易。

Uno T.: "Boundary Element Analysis of Uncoupled Quasistatic Hygrothermoelasticity by DRBEM-On the Optimal Interpolation Parameter of Domain Source Terms-"SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING A. I. J.. D-2. 337-339 (1998)

Uno T.：“DRBEM 对非耦合准静态湿热弹性的边界元分析 - 关于域源项的最佳插值参数 -”年会 A. I. J. D-2 技术论文摘要。

Shibaike H.,Karagiozis A.N.: "Dual Reciprocity Boundary Element Analysis for Two-Dimensional Quasi-Static Hygrothermoelasticity"BRI Proceedings. No.6. 103-126 (1999)

Shibaike H.、Karagiozis A.N.：“二维准静态湿热弹性的双互易边界元分析”BRI 论文集。

Shibaike H.: "Boundary Element Analysis of Uncoupled Quasi-Static Hygrothermoelasticity for Two-Dimensional Composite Walls"

Shibaike H.：“二维复合墙体非耦合准静态湿热弹性的边界元分析”

Shibaike H.: "Dual Reciprocity Boundary Element Analysis for Two-Dimensional Quasi-Static Hygrothermoelasticity"BRI Proceedings. No.6. 103-126 (1999)

Shibaike H.：“二维准静态湿热弹性的双互易边界元分析”BRI 论文集。