Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
ACI 446.4R 04 2004

ACI 446.4R 04 2004

$44.69

446.4R-04: Report on Dynamic Fracture of Concrete

Published By Publication Date Number of Pages
ACI 2004 29
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This report summarizes information regarding the analysis of concrete systems subjected to rapid loading. Engineers will obtain an overview of the subject matter along with recommended approaches for analysis and selection of material properties. Researchers will obtain a concise source of information from leading authorities in the field conducting research and applying these concepts in practice. This report describes how, as strain rates increase above 10 –4 to 10 –3 s –1 , concrete in tension and compression becomes stronger and stiffer, with less prepeak crack growth and less ductile behavior in the postpeak region. The rate dependence of bond is shown to be due to local crushing around deformations of the bar and to have the same relationship to rate as compressive strength. The practical effect of this local crushing is to concentrate strains in a small number of cracks, thus lowering the overall ductility of reinforced members. Finally, it is concluded that computational models of postpeak behavior under either dynamic or static load should use a localization limiter so that strain softening into arbitrarily small regions is prevented. The models should also properly pose the equations of motion; one appropriate way to do this is to represent softening through rate dependence, such as viscoplasticity. Keywords: computational modeling; concrete-reinforcement bond; cracking; fracture energy; fracture mechanics; fracture toughness; size effect; strain rate; stress-intensity factor; stress rate.

PDF Catalog

PDF Pages PDF Title
1 CONTENTS
CONTENTS
2 CHAPTER 1— INTRODUCTION
CHAPTER 1— INTRODUCTION
1.1 General
1.1 General
3 1.2—Conceptual models
1.2—Conceptual models
1.2.1 Macrolevel
1.2.1 Macrolevel
4 1.2.2 Mesolevel
1.2.2 Mesolevel
1.2.3 Microlevel
1.2.3 Microlevel
1.3—Scope
1.3—Scope
5 1.4—Abbreviations
1.4—Abbreviations
CHAPTER 2— EXPERIMENTAL EVIDENCE OF RATE EFFECTS
CHAPTER 2— EXPERIMENTAL EVIDENCE OF RATE EFFECTS
2.1—Mode I failure: plain concrete and mortar
2.1—Mode I failure: plain concrete and mortar
7 2.1.1 Charpy impact tests
2.1.1 Charpy impact tests
8 2.1.2 Drop-weight impact tests
2.1.2 Drop-weight impact tests
9 2.1.3 Displacement-controlled hydraulic testing machines
2.1.3 Displacement-controlled hydraulic testing machines
10 2.1.4 Split-Hopkinson pressure bar
2.1.4 Split-Hopkinson pressure bar
11 2.1.5 Tensile wave propagation device
2.1.5 Tensile wave propagation device
2.2—Failure under compressive stress
2.2—Failure under compressive stress
14 2.3—Mixed-mode failure
2.3—Mixed-mode failure
16 2.4—Bond failure
2.4—Bond failure
17 2.5—Concluding remarks
2.5—Concluding remarks
CHAPTER 3— ANALYTICAL MODELING OF STRAIN- RATE EFFECTS
CHAPTER 3— ANALYTICAL MODELING OF STRAIN- RATE EFFECTS
18 3.1—Models for rate dependence of fracture based on micromechanics
3.1—Models for rate dependence of fracture based on micromechanics
19 3.2—Rate-sensitive damage models that incorporate microcracking phenomena
3.2—Rate-sensitive damage models that incorporate microcracking phenomena
20 3.3—Strain-rate-dependent fracture model
3.3—Strain-rate-dependent fracture model
21 CHAPTER 4— COMPUTATIONAL MODELING OF LOCALIZED FAILURE UNDER DYNAMIC LOADING
CHAPTER 4— COMPUTATIONAL MODELING OF LOCALIZED FAILURE UNDER DYNAMIC LOADING
4.1—Model of fracture process zone
4.1—Model of fracture process zone
22 4.2—Nonlocal continuum models
4.2—Nonlocal continuum models
23 CHAPTER 5— SUMMARY
CHAPTER 5— SUMMARY
24 CHAPTER 6— REFERENCES
CHAPTER 6— REFERENCES
6.1— Referenced standard and reports
6.1— Referenced standard and reports
29 6.2—Other references
6.2—Other references

Related products

ACI 446.4R 04 2004
$44.69