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Note for Rehabilitation and Retrofitting of Structures - RRS By Riyaz Pasha

  • Rehabilitation and Retrofitting of Structures - RRS
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ELECTIVEELECTIVE-IV REHABILITATION & RETROFITTING OF STRUCTURES (R&RS) COURSE CODE:CODE:-A80151 REGULATION:REGULATION:-R15 (JNTUH) B.TECH IVIV-YEAR IIII-SEM PREPARED BY:BY:-RIYAZ MOHAMMED CIVIL ENGINEERING

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REHABILITATION & RETROFITTING OF STRUCTURES SYLLABUS UNIT-I INTRODUCTION TO REHABILITATION & RETROFITTING OF STRUCTURES Introduction-Deterioration of Structures-Distress in Structures-Causes & Prevention. Mechanism of Damage-Types of Damage. UNIT-II CORROSION OF STEEL REINFORCEMENT & FIRE DAMAGE STRUCTURES Corrosion of Steel Reinforcement: Causes, Mechanism & Prevention-Damage of Structures due to Fire-Fire Rating of Structures-Phenomena of Desiccation. UNIT-III INSPECTION AND TESTING Inspection & Testing-Symptoms & Diagnosis of Distress-Damage Assessment-NDT. UNIT-IV REPAIRS & STRENGTHENING OF STRUCTURES Repair of Structure-Common Types of Repairs-Repair in Concrete Structures-Repairs in Under Water Structures-Guniting-Shot Create-Underpinning-Strengthening of Structures & Strengthening Methods-Retrofitting-Jacketing. UNIT-V HEALTH MONITORING OF STRUCTURES (HMS) Health Monitoring of Structures-Use of Sensors-Building Instrumentation. ****** RIYAZ MOHAMMED Page i

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REHABILITATION & RETROFITTING OF STRUCTURES CONTENTS UNIT-I INTRODUCTION TO REHABILITATION & RETROFITTING OF STRUCTURES 1.1 Introduction...................................................................................................................1 1.2 Deterioration of Structures-Causes & Prevention.......1 1.3 Distress in Structures-Causes & Prevention……………........4 1.4 Damage-Mechanism & Types......................................................................9 UNIT-II CORROSION OF STEEL REINFORCEMENT & FIRE DAMAGE STRUCTURES 2.1 Corrosion of Steel Reinforcement- Mechanism, Causes & Prevention …...11 2.2 Damage of Structures due to Fire.........................15 2.3 Fire Rating of Structures..................17 2.4 Phenomena of Desiccation............18 UNIT-III INSPECTION AND TESTING 3.1 Inspection......20 3.2 Symptoms & Diagnosis of Distress.........................21 3.3 Damage Assessment.......22 3.4 NDT...........25 UNIT-IV REPAIRS & STRENGTHENING OF STRUCTURES 4.1 Introduction, Guniting, Shotcrete, Underpinning & Jacketing..........................34 4.2 Common Types of Repair.............................37 4.3 Repair in Concrete Structures..............................37 4.4 Repair in Underwater Structures...................41 4.5 Strengthening of Structures & Strengthening Methods...........................42 4.6 Retrofitting................43 UNIT-V HEALTH MONITORING OF STRUCTURES (HMS) 5.1 Introduction.......................50 5.2 Use of Sensors...................................54 5.3 Building Instrumentation.........................56 ADDITIONAL IMPORTANT • Cracking...................................59 • Maintenance.........................60 RIYAZ MOHAMMED Page ii

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REHABILITATION & RETROFITTING OF STRUCTURES UNIT-I INTRODUCTION TO REHABILITATION & RETROFITTING OF STRUCTURES 1.1-Introduction:1. Define & give the need or necessity or purpose or use for repair & rehabilitation of structures. Or Explain the need of rehabilitation of structure. [April-18(R13)] Ans:Repair:-It is the process of reconstruction & renewal of the existing buildings, either in whole or in part. Rehabilitation:-It is the process of returning a building to its previous condition. Or The process of repairing or modifying the structure to its desired useful condition. Need or Necessity or Use or Purpose of Repair:-The following are the need for repair:  The minor defects in the structures such as cracks are removed with the help of various repair techniques.  Reconstruction & renewal of the existing buildings.  Replacing or correcting deteriorated, damaged or faulty materials, components of a structure. Need or Necessity or Use or Purpose of Rehabilitation:-The following are the need for rehabilitation:  If the defects extend to a considerable damage, rehabilitation is necessary.  The action of restoring something that has been damaged.  It modifies a structure to a desired useful condition. 1.2-Deterioration of Structures-Causes & Prevention:2. Define deterioration of structures. Explain the mechanism, types or classification or categories, causes or factors causing or factors responsible & effects of deterioration of structures. Or RIYAZ MOHAMMED Page 1

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