Establishing the Shear Constitutive Laws of Fiber-Reinforced Polymer (FRP)-Strengthened Concrete Elements

本研究的目的是建立纯剪切作用下纤维增强聚合物（FRP）增强混凝土单元的新本构规律。在土木工程中使用FRP材料作为加固缺陷混凝土结构的经济方法可以追溯到20世纪70年代。由于缺乏实验数据，FRP抗剪增强混凝土构件的材料本构模型尚未进行开发。将采用基于单元的方法，开发构成复合材料结构的面板单元的本构关系，然后使用有限元方法集成以预测整体行为。为了产生这些关系，将使用休斯顿大学独特的通用面板测试机对一系列受纯剪切作用的frp加固钢筋混凝土面板进行大规模试验。nsf支持的项目OpenSees将用于开发新的有限元模型。本研究有望提高现有设计指南的准确性。这项研究将通过开发新的教育模块产生更广泛的影响，旨在将FRP复合材料的知识扩展到K-12，本科生和研究生以及实践工程师。招募代表性不足的学生将通过与休斯顿大学现有的外展项目协调进行。将执行一项技术转让计划，其中研究成果将通过在国家和国际会议上举行的一系列讨论会和演讲，以及在经审定的技术期刊上发表的出版物，传播给工程实践界。

The objective of this research study is to establish new constitutive laws for Fiber-Reinforced Polymer (FRP)-strengthened reinforced concrete elements subjected to pure shear. The use of FRP materials in civil engineering as an economical method for strengthening of deficient concrete structures dates back to the 1970s. Development of material constitutive models for FRP shear-strengthened concrete elements has not been previously conducted due to lack of experimental data. An element-based approach will be adopted in which constitutive relations of panel elements making up the composite structure are developed then integrated using the finite element method to predict the overall behavior. In order to generate these relations, large-scale tests of a series of FRP-strengthened reinforced concrete panels subjected to pure shear will be conducted using the University of Houston unique Universal Panel Tester machine. The NSF-supported program OpenSees will be used to develop the new finite element models.This research study is expected to improve the accuracy of available design guidelines. This research study will have broader impact through the development of new educational modules that aim at expanding the knowledge of FRP composite materials to K-12, undergraduate and graduate students, as well as practicing engineers. Recruiting of under-represented students will be conducted through coordination with existing outreach programs at the University of Houston. A technology transfer plan will be implemented, in which the research results are disseminated to the practicing engineering community through a series of seminars and presentations at national and international conferences, and publications in refereed technical journals.