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.

使用超延性，硬化的工程胶结复合材料（ECC）而不是脆性混凝土，可以克服标准R/C成员的脆性剪切和增强屈曲的局限性。结合ECC和增强的优势在于，结构构件的变形可以沿其长度分布，因此需要纵向加固的局部变形较少。 本研究的重点是通过利用ECC的异常行为及其与增强的相互作用来增强R/C结构的地震反应。引入了新颖的设计概念。具体而言，将对候选增强材料和ECC的相互作用进行详细的研究和分析。随后，将设计和测试柱和光束成员。最后，R/ECC柱和光束元件将组装成瞬时框架并进行了测试。总体目的是开发具有具有固有的，基于材料的安全机制的优质地震抗性的结构框架系统。