Chongqing Jiaotong University

Enhancement of Interface Performance in Steel–Concrete Composite Structures by Humidity-Cured Epoxy Bonding: Mechanisms and Structural Implications

This study evaluates a route in which a humidity-cured epoxy is applied to a cleaned steel surface and concrete is cast directly onto the still-tacky adhesive, eliminating welding and pre-drying. As a preliminary study, six push-out specimens in three configurations—studs only (G...

Establishing inherent deformation database for Q355 steel T-joints in stiffened panels by numerical approach and artificial neural network

The typical welding joints in stiffened panels are generally subjected to different structural restraint conditions, and the welding processes applied to individual joints may also vary to some extent. Consequently, inherent deformations may differ among joints within a given str...

Extracting energy from a non-Kerr rotating spacetime with an anomalous quadrupole moment via magnetic reconnection

Abstract This paper investigates how to extract energy from a non-Kerr rotating spacetime with an anomalous quadrupole moment via the Comisso–Asenjo magnetic reconnection mechanism. Unlike many other rotating spacetimes, this spacetime possesses closed timelike curves, and the co...

Steady-blowing jet control of a finite-length square cylinder at high reynolds number: Turbulence characteristics and DRL-based adaptive drag reduction

This study systematically investigates the turbulence characteristics and drag-reduction mechanisms of steady wall-normal blowing control on a three-dimensional square cylinder at Re = 22000 using a large-eddy simulation (LES) with the Smagorinsky subgrid-scale model. Four jet po...

Strength Development and Stabilization Mechanism of Water-Based Drilling Cuttings Treated with a Multi-Source Solid-Waste Binder

Water-based drilling cuttings (WBDCs) are a large-volume solid waste generated during oil and gas drilling. Their weak cementation and loose particle structure limit their direct engineering utilization. In this study, a multi-source solid-waste binder mainly composed of ground g...

Progressive crushing and energy absorption behavior of CFRP/316L multi-layer staggered cross-lattice-core sandwich structures under quasi-static compression

Lightweight energy-absorbing sandwich structures require a balance among energy absorption, structural mass, peak load, and crushing stability. This study proposes a multi-layer staggered cross-lattice-core sandwich structure and directly compares an all-316L stainless steel conf...

Parametric design method for a hydrodynamic torque converter and its hydrodynamic-cavitation characteristics analysis

As a fluid transmission device, the hydrodynamic torque converter (HTC) achieves flexible transmission through energy conversion between impeller cascades and fluid. High-speed, high-power operating conditions and highly twisted cascade systems lead to highly developed three-dime...

Towards Efficient and Explainable Road Crack Detection: A Transfer Learning-Driven SqueezeNet-based Approach

Abstract Under long-term exposure to complex environmental conditions and variable traffic loads, road pavements are generally prone to typical early damages such as cracking. Such defects can lead to severe structural deterioration and pavement service life reduction if not dete...

Dissolved inorganic carbon in Chongqing urban section of Yangtze River, China

Understanding carbon cycling in reservoir ecosystems during hydrological regulation is essential for assessing inland water contributions to the global carbon cycle. Dissolved inorganic carbon (DIC) represents the dominant carbon pool in reservoir waters. In this study, Chongqing...

Spatio-Temporal Evolution and Driving Factors of Agricultural Non-Point Source Pollution in the Upper Yangtze River Economic Belt Incorporating Ecological Regulation Functions

Agricultural non-point source pollution (ANPSP) presents a critical threat to water security in the upper reaches of the Yangtze River Economic Belt (UYREB). Traditional export coefficient models (ECMs) often fail to capture the spatially heterogeneous processes of pollutant tran...

The Significance of Diagenetic System Evolution to the Formation and Preservation of Hydrothermal Dolomite Reservoirs: A Case Study of the Permian Qixia Formation, Southwestern Sichuan, China

Abstract Understanding the evolution of diagenetic systems is crucial for elucidating the formation mechanisms of high-quality carbonate reservoirs. This study focuses on hydrothermal dolomite reservoirs developed in the platform margin zone of the Qixia Formation in the southwes...

Optimizing wollastonite treatment to enhance sustainability and reduce carbon emissions in cement-based materials

The sustainable use of natural minerals in construction materials is vital for minimizing the cement industry's environmental impact. Wollastonite, a calcium silicate mineral, offers significant potential as a supplementary cementitious material to reduce carbon emissions and enh...

Modeling Chloride Transport in Concrete Under the Coupling of Extreme Saltwater Intrusion and Short-Term Dry–Wet Alternation

Estuarine ship-lock concrete is exposed to chloride concentrations approaching 3.5% and operation-induced drying–wetting cycles as short as 80 min, conditions that are not adequately represented by conventional marine tidal models. This study experimentally investigated chloride...

Eccentric compressive behaviour of horizontal circumferential joints in concrete wind turbine towers considering joint opening

Horizontal circumferential joints are critical load-transfer regions in the concrete segments of steel–concrete hybrid wind turbine towers. However, existing studies and design methods generally treat the annular concrete section as a continuous member and do not explicitly consi...

An Accurate Vision-Based Dynamic Propagation Measurement Method for Simple Concrete Cracks

To measure dynamic crack evolution under sustained service loads during infrastructure defect inspection and structural condition assessment, a machine-vision-based methodology for high-accuracy measurement of simple crack propagation is proposed in this paper. A dynamic crack pr...

Modification of Steel Slag Aggregate in Road Engineering: Key Technologies, Performance Enhancements, and Sustainable Prospects

The growing demand for natural aggregates and continued stockpiling of steel slag have increased interest in using steel slag aggregate (SSA) in road engineering. However, delayed hydration of free calcium oxide (f-CaO) and free magnesium oxide (f-MgO), porous and rough surfaces,...

Early Jurassic Granitoids in the Pairigang Area, Tibet: Implications for the Evolution of the Neo-Tethyan Ocean and the Accretion of Juvenile Crust in the Southeastern Lhasa Block

The Jurassic represents one of the most significant periods within the widespread Mesozoic magmatism of the Lhasa Block; however, its formation age and petrogenesis have led to controversy over the deep genetic mechanisms responsible for magmatism. To address this, we present new...

Scenario-Based Multi-Objective Optimization of HVAC Supply Parameters for Respiratory Particle Control in a Subway Carriage

Respiratory infectious diseases pose substantial transmission risks in enclosed public-transport environments. Under a defined fully seated reference scenario, this study examines whether the same HVAC supply parameter governs two respiratory-particle control objectives in a subw...

A Structural–Visual Integrated Evaluation Framework for Seismic Damage Assessment of RC Double-Column Piers

The post-earthquake damage state of reinforced concrete (RC) double-column piers directly affects bridge traffic capacity and emergency response efficiency. To improve the interpretability of damage assessment, this study proposes a Structural–Visual Integrated Evaluation (SVIE)...

Collaborative Optimization of Mechanical and Alkali-Reduction Performance of Ecological Low-Alkali Porous Concrete Based on Alkalinity Gradient Regulation

Abstract Porous concrete (PC) is widely used in slope ecological restoration due to its good permeability and plantability. However, the synergistic evolution mechanism between its mechanical properties and pore alkalinity has not been systematically elucidated, which has become...