钢筋混凝土的高温性能试验及其计算

Preface

Introduction

0.1 Thermal Problems in Structural Engineering

0.2 Harmfulness and Resolution of Structure After Fire

0.3 Behavior Characteristics of Reinforced Concrete Structure at Elevated Temperature

References

PART Ⅰ Mechanical Behavior of Materials at Elevated Temperatures

1 Strength of Concrete at Elevated Temperatures

1.1 Testing Method and Device

1.1.1 General Testing Program

1.1.2 Design and Manufacture of the Furnace for Material Testing

1.2 Compressive Strength at Elevated Temperatures

1.2.1 General Phenomena During Heating

1.2.2 Cubic Compressive Strength at Elevated Temperatures

1.2.3 Compressive Strength After Cooling

1.3 Tensile Strength at Elevated Temperatures

Conclusions

References

2 Deformation of Concrete at Elevated Temperature

2.1 Deformation During Heating and Cooling

2.1.1 Deformation During Monotonic Heating and the Linear Expansion Coefficient

2.1.2 Deformation During the Heating-Cooling Cycle

2.2 Compressive Deformation and the Stress-Strain Curve at Elevated Temperature

2.2.1 Characteristics of Compressive Deformation

2.2.2 Prismatic Compressive Strength and Corresponding Strain

2.2.3 Equation of a Complete Stress-Strain Curve

2.2.4 Initial Elastic Modulus and Secant Modulus at Peak Stress

2.3 Stress-Strain Curves Under Repeated Loading

2.3.1 Envelope and Loci of the Common Point and the Stability Point

2.3.2 Formulas for the Unloading and Reloading Curves

2.4 Short Time Creep at Elevated Temperature

2.4.1 Creep Under Constant Temperature and Stress

2.4.2 Creep Under Variable Temperature and Stress

Conclusions

References

3 Temperature-Stress Paths and Coupling Constitutive Relation of Concrete

3.1 Temperature-Stress Paths and Deformation Components

3.1.1 Temperature-Stress Path and Its Resolution

3.1.2 Composite Components of Deformation at Elevated Temperatures

3.1.3 Testing Method and Average Temperature of the Specimen

3.2 Compressive Strength of Concrete Under Different Temperature-Stress Paths

3.2.1 Upper and Lower Bounds of Compressive Strength

3.2.2 Influence of Different Temperature-Stress Paths

3.3 Thermal Strain Under Stress and Transient Thermal Strain

3.3.1 Thermal Strain Under Stress

3.3.2 Transient Thermal Strain

3.4 Coupling Temperature-Stress Constitutive Relation

3.4.1 Comparison of Strains Under Different Temperature-Stress Paths

3.4.2 Basic Formulas of Coupling Constitutive Relation

3.4.3 Calculation Rules for Strain Increments

3.4.4 Example and Experimental Demonstration

Conclusions

References

4 Mechanical Behavior and Constitutive Relation of Reinforcement at Elevated Temperatures

4.1 Testing Method and Device

4.1.1 Testing Program

4.1.2 Test Contents and Data Processing

4.2 Tensile Strength at Elevated Temperature

4.2.1 Characteristics and Ultimate Tensile Strength

4.2.2 Yield Strength at Elevated Temperatures

4.2.3 Influence of Temperature-Stress Path

4.3 Tensile Strain and Stress-Strain Curve at Elevated Temperature

4.3.1 Characteristics of Tensile Strain

4.3.2 Equation of Stress-Strain Curve

4.3.3 Elastic Modulus

4.4 Thermal Strain Under Stress

4.4.1 Freely Expanding Strain

4.4.2 Thermal Strain Under Constant Stress

4.43 Short-Time Creep at Elevated Temperatures

Conclusions

References

PART Ⅱ Temperature Field on a Cross Section of a Structural Member

5 Temperature-Time Curve of Fire and the Equation of Heat Conduction

6 Theoretical Analysis of the Temperature Field

7 Calculation Charts for a Temperature Field on a Cross Section

PART Ⅲ Mechanical Behavior of Members and Structures at Elevated Temperatures

8 Behavior of Flexural Members at Elevated Temperatures

9 Behavior of Compressive Members at Elevated Temperatures

10 Behavior of Statically Indeterminate Structures at Elevated Temperatures

PART Ⅳ Theoretical Analysis and Practical Calculation Method

11 General Mechanical Characteristics of Inhomogeneous Sections

12 Finite Element Analysis of the Loadincl History for Structures

13 Practical Calculation Methods for the Ultimate Strength of Members and Structures at Elevated Temperature

14 Fire Resistance Analysis and Damage Grade Evaluation of a Structure

Index

本书主要论述钢筋凝土结构及其材料在不同温度\|荷载史下的受力性能。通过混凝土和钢筋材料，以及梁、柱和超静定结构试件等的系列高温试验研究，讨论了主要结果，分析了一般性规律，建立了材料的耦合热\|力本构关系，给出了准确的理论分析和简化的实用计算方法。本书的研究成果可应用于混凝土结构的火灾温度场分析、抗火分析和设计，以及火灾后的损伤评估和事故处理。本书可用作研究生教材，也可供相关领域研究人员和工程技术人员参考使用。

Comprehensive and readable, this book provides the tools and
techniques to properly analyze the effects of high temperature on
reinforced concrete, leading to safer,more stable structures. Based
on years of the authors' research, Experiment and Calculation of
Reinforced Concrete at Elevated Temperatures' four part treatment
starts with an unambiguous and thorough exposition of the
mechanica穊ehaviors of materials at elevated temperature, followed
by a discussion of temperature field of member sections, mechanical
behaviors of members and structures at elevated temperature, and
theoretica穉nalysis and practica穋alculation methods. The book
PrOvides unique insight into:
Coupling thermal-mechanica穋onstitutive relation of concrete
Exceptiona穉nalyses of beams and columns of rectangular section
with three surfaces and two adjacent surfaces exposing to high
temperature
Measurement and analysis of redistrbution of interna穎orces of statically indeterminate structre during heating-loading process
Finite element analysis and calculation charts for two-dimensiona穞emperature field of structura穖embers
With this book, engineers and architects can effectively analyze
the resulf of high temperature on concrete and materials which will
lead to better designs of fire resistant structures, as wel穉s
damage evaluation and treatment after fire.