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Development of design methodology for planar and shell structures made of cementitious composites.

开发由水泥复合材料制成的平面和壳结构的设计方法。

基本信息

批准号：
158108930
负责人：
Professor Dr. Rostislav Chudoba
金额：
--
依托单位：
Lehrstuhl und Institut für Massivbau
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/158108930?language=en
关键词：
Development design methodology planar shell

项目摘要

Recent achievements in the development of strain-hardening cementitious composites (SHCC) have led to remarkable improvements of their load-carrying behavior in terms of increased strength and ductility. Still, the potential transfer of these new high-performance materials into industrial practice is retarded by the lack of directly applicable material-specific design- and assessment rules. The major objective of the research project is to provide a methodology for characterization of SHCC, that will yield dimensioning rules and structural assessment for planar and shell structures. The methodology will exploit and utilize the experimental and numerical framework developed by the applicants in the past. The proposed multi-scale approach pragmatically reflects the correspondence between the ele-mentary dislocation effects occurring in the material structure near crack bridges and the macroscopic behavior of the composite. As a consequence, the number of tests needed for the characterization of a particular reinforcement layout within the composite cross section can be significantly reduced com-pared to characterization approaches based on purely phenomenological models. The availability of a generic, model-based characterization methodology is crucial for the formulation of a general design framework for a growing variety of SHCC as a prerequisite for their wider application in the industrial practice.

应变硬化胶凝复合材料（SHCC）的发展取得了近年来的成就，使其在强度和延性方面的承载性能得到了显著改善。然而，由于缺乏直接适用的材料特定设计和评估规则，这些新的高性能材料进入工业实践的潜在转移受到阻碍。该研究项目的主要目标是提供一种表征SHCC的方法，这将产生平面和壳结构的尺寸规则和结构评估。该方法将利用和利用过去申请人开发的实验和数值框架。提出的多尺度方法实际反映了裂纹桥附近材料结构中发生的初位错效应与复合材料宏观行为之间的对应关系。因此，与纯粹基于现象学模型的表征方法相比，表征复合材料横截面内特定钢筋布局所需的测试次数可以显著减少。通用的、基于模型的表征方法的可用性对于为越来越多的SHCC制定通用设计框架至关重要，这是其在工业实践中更广泛应用的先决条件。