document

Measurements of turbulent flow in a suddenly expanding flume with a rough bottom

Wang, L.X. (author)

Some measurements were conducted in a suddenly expanding flume with a rough bottom. In the approach flume, the friction velocity was determined in three ways and the distributions of turbulence intensities and Reynolds stress in a vertical were obtained. The measurement of the separating turbulent flow comprised the distribution of depth...

report 1983

document

Turbidity maximum formation in a well-mixed macrotidal estuary: The role of tidal pumping

Yu, Q. (author), Wang, Y. (author), Gao, J. (author), Gao, S. (author), Flemming, B. (author)

Traditionally, vertical circulation (induced by gravity circulation and tidal straining), tidal pumping, and resuspension are suggested as the major processes for the formation and maintenance of the estuarine turbidity maximum (ETM). Due to strong mixing, tidal pumping is considered as the dominating process in macrotidal estuaries. To analyze...

journal article 2014

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Integration of real-time traffic management and train control for rail networks: Part 1: Optimization problems and solution approaches

Luan, X. (author), Wang, Y. (author), De Schutter, B.H.K. (author), Meng, Lingyun (author), Lodewijks, G. (author), Corman, F. (author)

We study the integration of real-time traffic management and train control by using mixed-integer nonlinear programming (MINLP) and mixed-integer linear programming (MILP) approaches. Three innovative integrated optimization approaches for real-time traffic management that inherently include train control are developed to deliver both a train...

journal article 2018

document

Floating node method with domain-based interaction integral for generic 2D crack growths

Kumar, Sachin (author), Wang, Yihe (author), Poh, Leong Hien (author), Chen, B. Y. (author)

The Floating Node Method (FNM), first developed for modeling the fracture behavior of laminate composites, is here combined with a domain-based interaction integral approach for the generic fracture modeling of quasi-brittle materials from crack nucleation, propagation to final failure. In this framework, FNM is used to represent the...

journal article 2018

document

Asphalt-rubber interaction and performance evaluation of rubberised asphalt binders containing non-foaming warm-mix additives

Wang, H. (author), Liu, X. (author), Zhang, H. (author), Apostolidis, P. (author), Scarpas, Athanasios (author), Erkens, S. (author)

Warm mix asphalt (WMA) technology has been increasingly utilised in rubberised asphalt pavements to reduce the production and compaction temperatures and the incidental fumes and odours. This study aims to investigate the high, intermediate and low-temperature performance of crumb rubber modified asphalt binders containing WMA additives. The...

journal article 2018

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Benzimidazole linked polymers (BILPs) in mixed-matrix membranes: Influence of filler porosity on the CO₂/N₂ separation performance

Shan, M. (author), Seoane, Beatriz (author), Pustovarenko, Alexey (author), Wang, X. (author), Liu, X. (author), Yarulina, I. (author), Abou-Hamad, Edy (author), Kapteijn, F. (author), Gascon, Jorge (author)

The performance of mixed-matrix membranes (MMMs) based on Matrimid^® and benzimidazole-linked polymers (BILPs) have been investigated for the separation CO₂/N₂ and the dependency on the filler porosity. BILPs with two different porosities (BILP-101 and RT-BILP-101) were synthesized through controlling the...

journal article 2018

document

Review of warm mix rubberized asphalt concrete: Towards a sustainable paving technology

Wang, H. (author), Liu, X. (author), Apostolidis, P. (author), Scarpas, Athanasios (author)

In recent years, transportation agencies and the general public alike are demanding increased considerations of sustainability in transport infrastructure. Warm mix asphalt (WMA) is developed for reducing energy consumptions and emissions in asphalt paving industry. In addition, the use of rubberized asphalt concrete (RAC) has proven to be...

journal article 2018

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Infrastructure assisted adaptive driving to stabilise heterogeneous vehicle strings

Wang, M. (author)

Literature has shown potentials of Connected/Cooperative Automated Vehicles (CAVs) in improving highway operations, especially on roadway capacity and flow stability. However, benefits were also shown to be negligible at low market penetration rates. This work develops a novel adaptive driving strategy for CAVs to stabilise heterogeneous...

journal article 2018

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Non-Newtonian behaviors of crumb rubber-modified bituminous binders

Wang, H. (author), Liu, X. (author), Apostolidis, P. (author), Scarpas, Athanasios (author)

Crumb rubber-modified bitumen (CRMB) has been utilized in the asphalt paving industry for decades due to its various benefits. The complex interaction between bitumen and crumb rubber as well as the addition of warm-mix additives makes the typical laws of Newtonian fluids insufficient to describe the behaviors of highly modified bituminous...

journal article 2018

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Strain-based methodology for mixed-mode I plus II fracture: A new partitioning method for bi-material adhesively bonded joints: A new partitioning method for bi-material adhesively bonded joints

Moreira Arouche, M. (author), Wang, W. (author), Teixeira De Freitas, S. (author), de Barros, Silvio (author)

The dissemination of composite materials introduces applications of hybrid structures with composite and metal parts. The development of reliable methodologies to evaluate the performance of these structures is required. In this work, the mixed-mode fracture behaviour of a bi-material adhesively bonded joint is investigated. A new strain...

journal article 2019

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Experimental characterization of storage stability of crumb rubber modified bitumen with warm-mix additives

Wang, H. (author), Liu, X. (author), Erkens, S. (author), Scarpas, Athanasios (author)

One of the main drawbacks of crumb rubber modified bitumen (CRMB) is the storage stability issue. The storage instability of CRMB impedes its further application. This study aims to develop a robust methodology to evaluate the storage stability of CRMB binders using both mechanical and morphological tests. The effects of rubber contents (0, 5...

journal article 2020

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Fatigue performance of long-term aged crumb rubber modified bitumen containing warm-mix additives

Wang, H. (author), Liu, X. (author), van de Ven, Martin (author), Lu, Guoyang (author), Erkens, S. (author), Scarpas, Athanasios (author)

Recently warm mix asphalt (WMA) technologies have been introduced to rubberized asphalt mixtures to decrease the required construction temperatures and to alleviate the hazardous gas emissions. Rubberized asphalt pavements combining with WMA have the potential to improve the long-term pavement performance. This study aims to investigate the...

journal article 2020

document

A spatially explicit planning approach for power systems with a high share of renewable energy sources

Wang, N. (author), Verzijlbergh, R.A. (author), Heijnen, P.W. (author), Herder, P.M. (author)

Variable Renewable Energy Sources (VRES) are characterized by intensive land-use and variable production. In existing optimization models that minimize the total cost of the energy system, location-specific VRES production profiles are often used to estimate VRES potential, but land-use and land cover aspects have been largely ignored. In this...

journal article 2020

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Investigations of mixing technique on the rheological properties of self-compacting concrete

Li, Huajian (author), Huang, Fali (author), Yi, Zhonglai (author), Wang, Zhen (author), Zhang, Y. (author), Yang, Zhengxian (author)

Rheological properties are of significant importance in successful placement and performance of self-compacting concrete (SCC). In this work, the rheological properties of SCC, combined with a powder-viscosity modifying admixture, were investigated based on a series of experimental studies. The modified Bingham model was applied to determine...

journal article 2020

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Investigating the High- And Low-Temperature Performance of Warm Crumb Rubber-Modified Bituminous Binders Using Rheological Tests

Wang, H. (author), Liu, X. (author), Apostolidis, P. (author), Wang, Di (author), Leng, Zhen (author), Lu, Guoyang (author), Erkens, S. (author), Scarpas, Athanasios (author)

Rubberized asphaltic materials have been frequently combined with warm-mix asphalt technologies to tackle the issues of high energy consumptions and emissions during construction. Effective and accurate characterization of binder properties is conducive to the improvement of long-term pavement performance. The current study aims to quantify...

journal article 2021

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A review of experimental and theoretical fracture characterization of bi-material bonded joints

Wang, W. (author), Teixeira De Freitas, S. (author), Poulis, J.A. (author), Zarouchas, D. (author)

High performance structures require the use of different materials to meet their demanding requirements. Especially fibre reinforced polymer composites are nowadays often bonded to metals in order to take the most advantage of the materials properties and to minimize their disadvantages. However, the interface in such bi-material assemblies...

review 2021

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Hierarchical Model Predictive Control for on-Line High-Speed Railway Delay Management and Train Control in a Dynamic Operations Environment

Wang, Yihui (author), Zhu, Songwei (author), Li, Shukai (author), Yang, Lixing (author), De Schutter, B.H.K. (author)

In practice, the operation of high-speed trains is often affected by adverse weather conditions or equipment failures, which result in delays and even cancellations of train services. In this article, a novel two-layer hierarchical model predictive control (MPC) model is proposed for on-line high-speed railway delay management and train...

journal article 2022

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Mixed-Integer Nonlinear Programming for Energy-Efficient Container Handling: Formulation and Customized Genetic Algorithm

Xin, J. (author), Meng, Chuang (author), D'Ariano, Andrea (author), Wang, Dongshu (author), Negenborn, R.R. (author)

Energy consumption is expected to be reduced while maintaining high productivity for container handling. This paper investigates a new energy-efficient scheduling problem of automated container terminals, in which quay cranes (QCs) and lift automated guided vehicles (AGVs) cooperate to handle inbound and outbound containers. In our scheduling...

journal article 2022

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Mechanical behaviour and energy evolution of polyurethane-mixed ballast under revised bonding constitutive model

Xiao, Hong (author), Ling, Xing (author), Wang, Meng (author), Fang, Shu Wei (author), Wang, Haoyu (author)

The bonding contact presents complex modes in polyurethane-mixed ballast. The commonly used parallel bond model is revised and four different contact models are developed including Ballast-Ballast Contact Bonding, Ballast-Ballast Noncontact Bonding, Ballast-Sleeper Contact Bonding, and Ballast-Sleeper Noncontact Bonding. The mechanical...

journal article 2022

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A stabilized mixed-FE scheme for frictional contact and shear failure analyses in deformable fractured media

Wang, L. (author), Vuik, Cornelis (author), Hajibeygi, H. (author)

Simulation of fracture contact mechanics in deformable fractured media is of paramount important in computational mechanics. Previous studies have revealed that compressive loading may produce mode II fractures, which is quite different from mode I fractures induced by tensile loading. Furthermore, fractures can cross each other. This will...

journal article 2022