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。

基本信息

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

项目摘要

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

严重缺乏有关构建信封组件随时间函数的性能的定量信息。为建筑系统的耐用性和使用寿命设计设计尚未达到成熟阶段，因为尚未分析许多关键问题。从设计的寿命持久性方面，总体表现需要整合用于处理湿热运输，结构负荷以及化学和生物学活动的各种表现。 Todate，有限的工作包含这一范围的多学科活动。在本文中，将新的耐久性模型作为开发分析工具的第一步，以帮助建筑墙的湿热层塑性性设计属性/考虑。1。提出了一项集成的数值程序，用于湿法塑料机械变化，以及在二维复合壁中传递的简单热量和水分。讨论了二维复合建筑包络系统的未耦合的准湿层塑性模型的更多开发。边界元素法提出了使用边界积分平衡进行二维弹性位移和应力。使用双重互惠技术将与湿热体力相关的域积分转化为等效边界积分。与其他创新技术一起，例如对所有边界积分的分析评估，使此过程变得强大，稳健且易于扩展到完全非线性的湿润型塑料。2。使用针对二维问题采用的类似方法开发了三维边界元素数值程序，以简单地变化，水分和湿透塑料应力和位移，并验证了其数值精度。3。为了证明该模型在耐用性分析中的能力，为建筑墙组件提供了一个应用程序案例。分析了一种面对实际天气，热量，空气和水分传输边界条件的英国债券砌体壁系统。较少的