Autoadaptive Structural Composites with Large Deformation Capacity for Seismic Resistant Structures

抗震结构大变形能力自适应结构复合材料

• 批准号: 0070035
• 负责人: Victor Li
• 金额: $ 15万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-15 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0070035&HistoricalAwards=false
• 关键词: Autoadaptive; Structural; Composites; Large; Deformation

The use of ultra ductile, strain-hardening Engineered Cementitious Composites (ECC), instead of brittle concrete, can overcome limitations in brittle shear and reinforcement buckling of standard R/C members. The advantage of combining ECC and reinforcement is that the deformation of the structural member can be distributed along its length, and therefore require less localized deformation of the longitudinal reinforcement. The present research focuses on the enhancement of seismic response of R/C structures by exploiting the unusual behavior of ECC and its interaction with reinforcement. Novel design concepts are introduced. Specifically, detailed investigations and analyses will be performed on the interaction of candidate reinforcement materials and ECC. Subsequently, column and beam members will be designed and tested. Finally, R/ECC column and beam elements will be assembled into moment resisting frames and tested. The overall objective is to develop a structural frame system with superior seismic resistance with an intrinsic, materials-based safety mechanism.

使用超韧性、应变硬化的工程水泥基复合材料（ECC）代替脆性混凝土，可以克服标准R/C构件的脆性剪切和钢筋屈曲的限制。ECC和加强件相结合的优点在于，结构构件的变形可以沿着其长度分布，因此需要纵向加强件的较小的局部变形。 目前的研究重点是通过利用ECC的异常行为及其与钢筋的相互作用来增强R/C结构的地震反应。新的设计概念被引入。具体而言，将对候选加固材料和ECC的相互作用进行详细的调查和分析。随后，将设计和测试柱和梁构件。最后，将R/ECC柱和梁单元组装成抗弯框架并进行测试。总体目标是开发一种结构框架系统，该系统具有上级抗震性，并具有基于材料的内在安全机制。