This research evaluates the behavior of slab-column connections in a reinforced concrete flat slab system and subjected to symmetrical loading, strengthened to the shear with carbon fiber reinforced polymer (CFRP). The strengthening method consists in applying CFRP sheets as shear resistant element, by bonding it through perpendicular holes to the plane of the slab. As the current standards do not deal with strengthening to shear with CFRP reinforcement, it was assessed the application of the code's required from by ACI 318 (2011) Abstract Resumo IntroductionUncertainties regarding structural safety -like suspicions of project and execution error, doubts about the stability due to apparently pathological demonstrations and changes of service loads -are situations that justify an intervention with the strengthening of a structure. For the case of punching in a slab-column connection, some constructive systems which make possible this strengthening with improvement. However, these systems are invasive and, usually, imposes changes of the structure geometry. The use of carbon fiber reinforced polymer sheets (CFRP) as an alternative for the increase of the load bearing capacity of flat slabs is a simple and fast intervention, which efficiency has been proved by experimental research in the last years. The main idea of strengthening method is to install CFRP as a member resistant to shearing. The application occurs by bonding the CFRP sheets through perpendicular holes to the plane of the slab. It is necessary to pay attention to the requirements of the sheet anchorage and for the later filling of the holes with resistance grout and elasticity modulus compatible with the ones from the substratum. There are not regulations specifically dealing with the use of CFRP as slab punching reinforcement. Then, the objective of this research is to evaluate the safety, economy and the accuracy of the application of some of the main project regulations in the slab punching resistance in reinforced concrete strengthened to punching with CFRP. (2002) [1] will be adopted so that these regulations can be used in the case studied, with CFRP reinforcement, in which the deformation limits of ACI 440.2R is considered. This last code deals only with the strengthening of reinforced concrete structures using fiber-reinforced polymers. From the calculation results, will be evaluated the dispersion and the conservatism level of each case. JustificationThe study of strengthening to flat slab punching is justified by the progressive use of this structural system, combined with the dangerous awareness of a ruin by shear. The common strengthening to punching techniques, basically, consist in the use of capitals (made of concrete or metal) in the strengthening of a flexure reinforcement or in the posterior introduction of a shear reinforcement composed by steel bolts. The additional resistance provided by the posterior fastening of steel bolts in the critical shear area is an alternative that rules out the possibility of part geometry change. Ho...
Among the many areas of Civil Engineering, there is one known as Structures. In view of the growing sophistication of the constructions, and consequently an increase in the complexity of the calculations involved, auxiliary computational software has been revolutionizing this area. Already present in the professional work of the engineer, this technological support has a direct effect on the teaching and learning process, since many computer programs, some of them difficult to understand by students, are study tools of the disciplines of the Structures area. Among the contents in which the students present more difficulty, there is Finite Element Analysis, a discipline offered on graduation and that had its practical development linked to the advent of computation. By being the method most used as a computational tool in the field of engineering these days, this knowledge is indispensable to the students of this course. The objective of this work is to construct a computational code in order to facilitate the study of linear-elastic behavior of Euler-Bernoulli beams with punctual loads using the Finite Element Analysis. For this, a numerical example was analyzed, with the aid of a program implemented with the Python® language, to reinforce the effectiveness of the program and, consequently, to promote the improvement of student learning.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.