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MATERIALS AND JACKETING TECHNIQUE FOR RETROFITTING OF STRUCTURES Shri. Pravin B. Waghmare Address for Correspondence Acharya Shrimannarayan Polytechnic,Pipri(M), Wardha –Maharashtra ABSTRACT Seismic protection of buildings is a need-based concept aimed to improve the performance of any structure under future earthquakes. Earthquakes of varying magnitude have occurred in the recent past in India, causing extensive damage to life and property. Some recently developed materials and techniques can play vital role in structural repairs, seismic strengthening and retrofitting of existing buildings, whether damaged or undamaged. The primary concern of a structural engineer is to successfully restore the structures as quickly as possible. Selection of right materials, techniques and procedures to be employed for the repair of a given structures have been a major challenges. Innovative techniques of the structural repairs have many advantages over the conventional techniques. Some guidelines regarding selection of materials for repair work such as steel, fiber reinforced polymer, has been discussed in the present paper. The selection of materials and techniques to be used depend on many aspects that may be viewed from different prospectives i. e. requirement and availability of financial resources, applicability and suitability of materials for the repair of damaged structures. Use of standard and innovative repair materials, appropriate technology, workmanship, and quality control during implementation are the key factors for successful repair, strengthening and restoration of damaged structures. KEYWORDS: confinement, jacketing, fiber reinforced polymer jacketing, steel jacketing, beam jacketing. منبع : کانال تلگرام بهسازی و مقاوم سازی سازه ها [Hidden Content] 4 IJAERS.pdf

Strengthening Demand of Columns in A RCC Structure Due To Construction of An Additional Storey Mohd Irfan, D r . Abhay Sharma, Dr. Vivek G arg PG Scholar, Associate Professor Assistant Profe ssor Civil Engineering Department Civil Engineering Department Civil Engineering Department NIT Bhopal, Madhya Pradesh, India. NIT Bhopal, Madhya Pradesh, India NIT Bhopal, Madhya Pradesh, India .Abstract - Generally the people construct the structure to fulfill their current needs but with the passage of time they realize that their demands have increased and there is a need for the addition/alteration of the current structure. This demand can be fulfilled by constructing a new storey. However, provision for additional load due to the new construction over existing structure was not made in the structural design of the old structure. Therefore, the construction of new storey requires the strengthening of the old structure. The present study investigates the structural behaviour of an RC frame under the additional load in the form of a new storey. The analysis of existing structure (two storey) and proposed structure (one additional storey constructed over existing two storey structure) is performed by using structural analysis software i.e. STAAD Pro. The analysis results of existing and proposed structure are compared to evaluate the increase in structural forces due to the construction of a new storey. The results indicates that the significant increase is found in the axial force and bending moment in columns. The weak and deficient columns are identified and strengthened for the additional loads and additional moments. The strengthening of columns is done by jacketing of the columns using four steel angles at corners, confined with the help of batten plates placed at equal spacing along the length of the column. Keywords- Concrete; Steel; Jacketing; Strengthening. منبع : کانال تلگرام بهسازی و مقاوم سازی سازه ها [Hidden Content] V3I8_IJERTV3IS080489.pdf