本专著结合靠前的离心模型数值仿真技术，采用显式动力分析软件LSDYNA，考虑土与结构相互作用，流固耦合精细模拟爆炸波在空气中传播、反射等现象，研究了地下结构在爆炸波作用下的响应和破坏模式，再现了土在爆炸波作用的弱化和液化现象与机理，并系统比较了各类加固减灾方式的效果。本专著通过对城市地下工程安全问题全面系统的研究，提升城市地下工程对爆炸等公共安全事件的抵御、吸收、适应、恢复、学习的能力。本书可供城市公共安全与防护方向的研究人员和高等院校师生参考使用。

Chapter 1 Introduction and Literature Review
1.1 Background and Research Objective
1.2 Literature Review
1.2.1 Responses of Underground Structures Subjected to Blast Loading
1.2.2 Pore Pressure and Soil Liquefaction Induced by Blast
1.2.3 Multi-hazard Engineering for Tunnel Lining
1.2.4 Centrifuge Modeling Technique
1.2.5 Numerical Simulation of Explosion
1.2.6 Numerical Simulation of Soil-Tunnel Interaction
1.3 Research Approaches
1.4 Chapter Contents
Chapter 2 Blast Simulation Involving Air-Structure Interaction
2.1 Blast Wave Propagation in Air
2.1.1 Theoretical Background
2.1.2 Blast Wavelength and Finite Element Size
2.2 Simulation of Blast Loading in LS-DYNA
2.2.1 Modeling of Air and Explosives
2.2.2 MM-ALE Approach
2.2.3 LBE+MM-ALE Approach
2.3 Simulation of Free Air Blast
2.3.1 Effects of Initial Air Density
2.3.2 Simulation of Free Air Blast with Different Locations of Ambient Layer
2.3.3 Amount of Explosive and Element Size
2.4 Centrifuge Technique
2.5 Reflected Blast on a Rigid Surface
2.6 Simulation of Blast Effect on a Steel Plate
2.7 Size of Air Domain Inside the Tunnel
2.8 Conclusions and Discussions
Chapter 3 Numerical Modeling of Soil-Tunnel Interaction
3.1 Modeling of Tunnel Lining
3.2 Modeling of Soil Tunnel Interfaces
3.3 Modeling of Unsaturated and Saturated Soils
3.4 Evaluation of FHWA Soil Model
3.4.1 Introduction
3.4.2 Evaluation
3.5 Conclusions
Chapter 4 Response of Circular Tunnels Subjected to Medium Internal Blast Loading
4.1 Base-Case Finite Element Model
4.2 Simulation Results with 200kg TNT
4.2.1 General Response of Tunnel
4.2.2 Response in Soil-Tunnel Interface
4.2.3 Response in Soil
4.2.4 Analysis Results with Simplified Blast Load
4.2.5 Equivalent Triangle Impact Load
4.3 Simulation Results with 100kg TNT
4.3.1 Response of Tunnel
4.3.2 Impact Loading on Tunnel Lining
4.3.3 Response in Soil
4.4 Simulation Results with 50kg TNT
4.4.1 Response of Tunnel
4.4.2 Response of Soil
4.5 Conclusions
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