Jie Tang

Tongji University · College of Civil Engineering

This paper proposes a simplified analytical solution for longitudinal seismic responses of a circular tunnel crossing a fault zone under longitudinally propagating shear waves. The transmissions and reflections of shear waves at two geological interfaces between the fault zone and intact rock are considered when calculating the free‐field displacem...

Borehole breakout is an important geological phenomenon that provides a significant reference for the estimation of the direction and magnitude of in situ stress. To better understand the water content effect on borehole breakouts, a series of experiments on red sandstone was conducted. The standard cylindrical samples and cubic samples containing...

The dynamic tensile behavior of a novel-developed plate steel with high strength and toughness is investigated. Uniaxial tensile tests are conducted at various strain rates varying from 0.1 s−1 to 1000 s−1, and then scanning electron microscope and electron backscattered diffraction analyses are performed on tensile specimens at failure. A large an...

This paper presents a novel numerical framework that can simulate the mechanical response and damage characteristics of mountain tunnels under faulting more precisely and efficiently. Both the submodeling and two-stage models are adopted in the framework. The submodeling technique is used to obtain a precise simulation of tunnel-fault interaction w...

Fully understanding the influence of water on the rock materials' mechanical properties is of great significance to the safety design and evaluation in rock engineering. In this study, sandstone was pretreated with different wetting-drying cycles (0-15), and its pore characteristics were characterized by low-field nuclear magnetic resonance (LF-NMR...

A unified strain-hardening and strain-softening (UHS) elastoplastic constitutive model is developed to capture the nonlinearity of intact rocks. Three new developments are incorporated into the model: (i) a unified strain-hardening and strain-softening rule, which is used to describe the nonlinearity of the stress–strain curve; (ii) the cohesion lo...

This paper aims to clarify the mechanism of the longitudinal response of a tunnel under normal faulting via a comprehensive analysis of available experimental data and numerical simulations. Four 1g condition model tests were reviewed and reanalysed to highlight the key characteristics of the tunnel response under normal faulting: S-shaped deformat...

This paper aims to investigate the tensile behavior of a novel high-strength and high-toughness steel at different strain rates ranging from 0.1 s⁻¹ to 1000 s⁻¹. Uniaxial tensile tests with seven different strain rates were conducted by the Zwick/Roell HTM5020 testing machine. All experimental results reveal that (i) the steel is characterized by a...

In this paper, a series of uniaxial compression experiments were carried out on sandstone with varying water contents, and acoustic emission (AE) signals were synchronously collected in the experimental process. It reveals that water content has a significant effect on the mechanical behavior and AE signals of sandstone. As the water content increa...