Failure modes of confined masonry walls

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Table of contents

Chapter 1 ntroduction
1.1 Justification
1.2 Main objective and goals
1.3 Study contents
Chapter 2 Masonry review
2.1 Introduction
2.2 Confined masonry
2.2.1 Masonry units
2.2.2 Mortars
2.2.3 Confining elements of reinforced concrete
2.3 Failure modes of confined masonry walls
2.4 Experimental research in Mexico
2.4.1 Experimental research in Mexico City
2.4.2 Experimental research outside Mexico City
2.5 Retrofitting and rehabilitation of masonry
2.5.1 Types of reinforcement
2.5.1.1 External reinforcement
2.5.1.1 Reinforcement of mortar joints
2.6 Design of masonry buildings in Guerrero State
2.7 Conclusions
Chapter 3 Masonry modeling review
3.1 Introduction
3.2 Types of masonry models
3.3 Masonry micro-models
3.4 Masonry macro-models
3.4.1 Level-one macro-models
3.4.1 Level-two macro-models
3.5 Simplified models
3.6 Conclusions
Chapter 4 Experimental program and results
Experimental and numerical study of confined masonry walls under in-plane loads
4.1 Introduction
4.2 Description of the experimental program
4.3 Tests on elements
4.3.1 Compressive strength of solid clay bricks
4.3.2 Mortars
4.4 Test on specimens
4.4.1 Mechanical properties of mortar joints
4.4.2 Shear strength of masonry panels
4.4.2.1 Behavior of unreinforced panels
4.4.2.2 Behavior of reinforced panels
4.4.2.3 Panels associated to masonry walls
4.4.3 Compressive strength of masonry prisms
4.5 Test on confined masonry walls
4.5.1 Description of the mechanical-electronic devices and apparatus
4.5.2 Building process and characteristics of walls
4.5.3 Instrumentation of walls
4.5.4 Test on wall MUR1
4.5.5 Test on wall MUR2
4.5.6 Test on retrofitted wall MRM2
4.5.6.1 Retrofit process
4.5.6.2 Description of behavior and failure mode
4.5.7 Test on rehabilitated wall MMR3
4.5.7.1 Rehabilitation process
4.5.7.2 Description of behavior and failure mode
4.5.8 Comments about the behavior of confined masonry walls
4.6 Conclusions
Chapter 5 Numeric simulations of masonry walls behavior
5.1 Introduction
5.2 Masonry modeling by using micro-models
5.2.1 Behavior of the mortar joint
5.2.1.1 Shear slipping mode
5.2.1.2 Tension cut-off mode
5.2.1.3 Compression cap mode
5.2.1.4 Corners
5.2.2 Behavior of masonry units
5.2.3 Behavior of concrete elements
5.3 Micro-models for the masonry panels
5.3.1 Unreinforced masonry panel MM1
5.3.1.1 Modeling
5.3.1.2 Mechanical properties
5.3.1.3 Results
5.3.2 Reinforced masonry panel
5.3.2.1 Modeling
5.3.2.2 Results
5.4 Micro-model of confined masonry wall
5.4.1 Model of the wall MUR2
5.4.1.1 Description and modeling
5.4.1.2 Mechanical properties
5.4.1.3 Results
5.4.2 Model of the wall MUR2 with metallic reinforcement mesh inside the joints
5.5 Masonry modeling by using a macro-model level two
5.5.1 Background
5.5.1.1 Behavior of masonry
5.5.1.2 Behavior of concrete columns
5.6 Analysis procedure and results
5.6.1 Results of the wall MUR2
5.6.2 Results for other walls
5.7 Conclusions
Chapter 6 Simplified models to asses the lateral masonry walls bearing capacity
6.1 Introduction
6.2 Experimental information
6.3 Vertical load supported by the masonry
6.4 Shear failure model
6.4.1 Masonry wall resistance
6.4.1.1 Masonry resistance
6.4.1.2 Vertical load effect
6.4.1.3 Columns resistance
6.4.2 Results
6.5 Induced tension failure model
6.5.1 Masonry wall resistance
6.5.2 Results
6.6 Comparison of results for both models
6.7 Limits of application
6.8 Conclusions
Chapter 7 Conclusions and perspectives