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Lu, T. (author), Metrikine, A. (author), Steenbergen, M.J.M.M. (author)A periodically supported beam on a visco-elastic half-space is considered to model the vibration of railway tracks. The viscosity of the half-space is assumed to be of the Kelvin-Voigt type. Making use of the concept of equivalent dynamic stiffness, the reaction of the half-space to the sleepers is replaced by a system of identical spring...journal article 2020
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Lu, S. (author), ten Veldhuis, Marie-claire (author), van de Giesen, N.C. (author)In this paper, a methodology is proposed to quantitatively evaluate precipitation products for multiple purposes. Evaluation mainly focuses on rainfall characteristics relevant to hydrological or agricultural ap-plications: spatial distribution pattern, effect of aggregation over time, the capture of small-scale variability and seasonality,...journal article 2020
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Zang, Tianyang (author), Zang, Haofeng (author), Xi, Z. (author), Du, Jing (author), Wang, Han (author), Lu, Yonghua (author), Wang, Pei (author)Optical antennas enable efficient coupling between propagating light and bonding electromagnetic waves like surface plasmon polaritons (SPPs). Under the illumination of inhomogeneous optical fields, propagating SPPs mediated by multimode antennas could be spatially asymmetric and the asymmetry strongly depends on the position of the antennas...journal article 2020
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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
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Lu, T. (author), Tsouvalas, A. (author), Metrikine, A. (author)The in-plane steady-state response of a rotating ring on elastic foundation subjected to a stationary load is investigated theoretically using a high-order model in the framework of the plane strain assumption. The adopted high-order model accounts for the through-thickness variation of stresses and displacements, as well as the boundary...journal article 2020
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Li, Z. (author), Lu, T. (author), Liang, X. (author), Dong, H. (author), Ye, G. (author)This study aims to provide a better understanding of the autogenous shrinkage of slag and fly ash-based alkali-activated materials (AAMs) cured at ambient temperature. The main reaction products in AAMs pastes are C-A-S-H type gel and the reaction rate decreases when slag is partially replaced by fly ash. Due to the chemical shrinkage and the...journal article 2020
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Busch, H. (author), Tonin, F. (author), Alvarenga Da Silva, N. (author), van den Broek, M.A. (author), Lu, Simona (author), Daran, J.G. (author), Hanefeld, U. (author), Hagedoorn, P.L. (author)Oleate hydratases (Ohys, EC 4.2.1.53) are a class of enzymes capable of selective water addition reactions to a broad range of unsaturated fatty acids leading to the respective chiral alcohols. Much research was dedicated to improving the applications of existing Ohys as well as to the identification of undescribed Ohys with potentially novel...journal article 2020
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Xu, Lei (author), Lu, T. (author)In the framework of vehicle-track interaction, this work puts an emphasis on clarifying the influence of sleeper finite element types on system dynamic responses. Three sleeper element types, namely the rigid-body, extensible Euler-Bernoulli beam and solid element are used respectively in the track system modelling with detail mathematical...journal article 2020
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Lu, T. (author), Li, Z. (author), Huang, H. (author)In recent years more and more attention has been given to autogenous shrinkage due to the increasing use of high-performance concrete, which always contains supplementary materials. With the addition of supplementary materials-e.g., fly ash and blast furnace slag-internal relative humidity, chemical shrinkage and mechanical properties of...journal article 2020
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Lu, Guoyang (author), Wang, H. (author), Törzs, Tom (author), Liu, Pengfei (author), Zhang, Yuqing (author), Wang, Dawei (author), Oeser, Markus (author), Grabe, Jürgen (author)Permeable pavements have been widely used as an effective means to improve hydrological characteristics and the ecology of the urban environment. This study aims to investigate the response of fully permeable pavement (FPP) subjected to dynamic loading under dry and saturated conditions. A full-scale test track topped with polyurethane bound...journal article 2020
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Xu, L. (author), Lu, T. (author)A straightforward and practical method of frequency-domain analysis is developed for coupled vehicle-track system. The influence of the track flexibility and spatial coherence of irregularities on frequency response of vehicle-track systems are systematically studied<br/>accounting for train velocity and irregularity wavelength. Calculations...journal article 2020
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Lu, T. (author), Li, Z. (author), van Breugel, K. (author)In recent decades, several simulation models have been proposed to predict autogenous shrinkage of cementitious systems. In most of these models, however, only the elastic deformation caused by self-desiccation of the hydrating cement paste is considered. In fact, cement paste is not an ideal elastic material. Also the time-dependent...journal article 2020
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Lu, Jieyu (author), Qiu, Yubao (author), Wang, Xingxing (author), Liang, Wenshan (author), Xie, Pengfei (author), Shi, Lijuan (author), Menenti, M. (author), Zhang, Dongshui (author)The High Mountain Asia (HMA) region, ranging from the Hindu Kush and Tien Shan in the west to the Himalaya in the south with an altitude between 2000 and 8844 m, holds the largest reservoir of glaciers and snow outside Earth Polar Regions. In the last decades, numerous glaciers and lake areas there have undergone tremendous changes with water...journal article 2020
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Guo, Wenqi (author), Su, Jing (author), Lu, Wenjun (author), Liebscher, Christian H. (author), Kirchlechner, Christoph (author), Ikeda, Yuji (author), Körmann, F.H.W. (author), Liu, Xuan (author), Xue, Yunfei (author), Dehm, Gerhard (author)In conventional metallic materials, strength and ductility are mutually exclusive, referred to as strength-ductility trade-off. Here, we demonstrate an approach to improve the strength and ductility simultaneously by introducing micro-banding and the accumulation of a high density of dislocations in single-phase high-entropy alloys (HEAs). We...journal article 2020
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Wang, H. (author), Yang, Jun (author), Lu, Guoyang (author), Liu, X. (author)Self-healing of asphalt concrete (AC) is highly dependent on temperature, and its healing capacity increases with elevated temperatures. The main objective of this study is to investigate the effect of microwave heating on promotion of self-healing in AC. With this purpose, two types of AC specimens (neat AC without additives and conductive...journal article 2020
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Li, Z. (author), Yao, X. (author), Chen, Y. (author), Lu, T. (author), Ye, G. (author)Alkali-activated slag and fly ash (AASF) materials are emerging as promising alternatives to conventional Portland cement. Despite the superior mechanical properties of AASF materials, they are known to show large autogenous shrinkage, which hinders the wide application of these eco-friendly materials in infrastructure. To mitigate the...journal article 2020
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Faragau, Andrei B. (author), Mazilu, Traian (author), Metrikine, A. (author), Lu, T. (author), van Dalen, K.N. (author)Transition zones in railway tracks are areas with considerable variation of track properties (e.g., foundation stiffness) which may cause strong amplification of the response, leading to rapid degradation of the track geometry. Two possible indicators of degradation in the supporting structure are identified, namely the wheel-rail contact...journal article 2020
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Zhao, Chenglong (author), Wang, Qidi (author), Yao, Zhenpeng (author), Wang, Jianlin (author), Sánchez-Lengeling, Benjamín (author), Ding, Feixiang (author), Qi, Xingguo (author), Lu, Yaxiang (author), Wagemaker, M. (author)Sodium-ion batteries have captured widespread attention for grid-scale energy storage owing to the natural abundance of sodium. The performance of such batteries is limited by available electrode materials, especially for sodium-ion layered oxides, motivating the exploration of high compositional diversity. How the composition determines the...journal article 2020
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Li, Shiyang (author), Huang, Xiangfeng (author), Wan, Zhengyu (author), Liu, Jia (author), Lu, Lijun (author), Peng, Kaiming (author), Schmidt-Ott, A. (author), Bhattarai, Rabin (author)La(OH)<sub>3</sub> metal engineered nanoparticles (MENPs) are efficient phosphate binders; however, complex synthesis procedures and purity as well as agglomeration issues impede their development and practical applications. Herein, a green and a one-step method in combination with the spark ablation aerosol technology and electrospinning is...journal article 2020
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Rwei, A.Y. (author), Lu, Wei (author), Wu, Changsheng (author), Human, Kelia (author), Suen, Emily (author), Franklin, Daniel (author), Fabiani, Monica (author), Gratton, Gabriele (author), Rogers, John A. (author)The standard of clinical care in many pediatric and neonatal neurocritical care units involves continuous monitoring of cerebral hemodynamics using hard-wired devices that physically adhere to the skin and connect to base stations that commonly mount on an adjacent wall or stand. Risks of iatrogenic skin injuries associated with adhesives...journal article 2020