Скачать или смотреть The New Approach for Qualification and Design of Post-Installed Reinforcing Bars in Europe

Title: The New Approach for Qualification and Design of Post-Installed Reinforcing Bars in Europe – Background and Explanations

Presented By: Akanshu Sharma, Purdue University

Description: The qualification and design of post-installed reinforcing bars have seen a major paradigm shift in Europe over the past few years. This is attributed to the new European Assessment Documents (EAD) and the Technical Report (TR) 069 being issued by the European Organisation of Technical Approvals (EOTA). The author of this paper played a pivotal role in the development of the new test and qualification methods as well as the design provisions. The development of the documents took place in steps with the first step as establishing the equivalence of post-installed reinforcing bars with the cast-in bars under seismic loads, second establishing the higher performance of post-installed bars compared to the cat-in bars under static and eventually for seismic loads. A new test specimen (modified beam-end specimen) was developed for conducting the tests, a new method was developed to evaluate the results for establishing the influence of various parameters on the performance of post-installed bars, a new displacement-based testing protocol was developed for the seismic qualification tests, while a hierarchy-based approach was developed to design the structural connections formed using post-installed reinforcing bars. This paper presents the background research that went into development of new formulations, provides the justifications for the design of test specimen and test protocol, and explains the design concept along with the limitations and scope of applications.