Results 11 to 20 of about 47,571 (265)

Influence of expansion joint setting on the dynamic characteristics of curved bridges with unseating-prevention devices

open access: yes工程科学学报, 2015
A finite element model was built for a curve bridge with an unseating-prevention device. The collision effect of the curved bridge under rare earthquake was studied and the dynamic response mechanism was discussed based on this finite element mod-el. The
SONG Bo   +3 more
doaj   +1 more source

Study on Long-Term Dynamic Mechanical Properties and Degradation Law of Sandstone under Freeze-Thaw Cycle

open access: yesShock and Vibration, 2020
This study is based on the tunnel-face slope engineering of Dongfeng tunnel in Shanxi section of China’s Shuozhou-Huanghua Railway. The sandstone specimens in the perennial freeze-thaw zone of the slope were collected to carry out freeze-thaw cycle ...
Qingsong Pu   +6 more
doaj   +1 more source

Assessment of Pavement Structural Conditions and Remaining Life Combining Accelerated Pavement Testing and Ground-Penetrating Radar

open access: yesRemote Sensing, 2023
The inspection and monitoring of structural conditions are crucial for the maintenance of semi-rigid base pavement. To achieve the inverse calculation of material parameters and obtain the mechanical response of asphalt pavement, a method of modulus ...
Zhen Liu, Qifeng Yang, Xingyu Gu
doaj   +1 more source

Research on Actuation Behavior of Piezoelectric Fiber Composite

open access: yesTaiyuan Ligong Daxue xuebao, 2021
Macrofiber composite material (MFC) is a new type of high performance piezoelectric fiber composite material with great output and strong environmental adaptability.
Hao CHEN   +3 more
doaj   +1 more source

Failure mechanism of the large‐section roadway under mined zones in the ultra‐thick coal seam and its control technology

open access: yesEnergy Science & Engineering, 2020
Aiming at serious deformation and failure of large‐section coal roadway under mined zones in ultra‐thick coal seam, its deformation and failure characteristics are analyzed based on the field measurement.
Yang Tai   +3 more
doaj   +1 more source

Restoration of Road Pavement Depending on the Degree of Destruction of the Road

open access: yesNauka ta progres transportu, 2023
Purpose. The main purpose of this work is to develop a methodology for road pavement restoration depending on the degree of road destruction. Methodology.
O. F. Luzhytskyi   +3 more
doaj   +1 more source

Void Detection of Airport Concrete Pavement Slabs Based on Vibration Response Under Moving Load

open access: yesSensors
This study proposes a vibration-based approach for detecting and quantifying sub-slab corner voids in airport cement concrete pavement. Scaled down slab models were constructed and subjected to controlled moving load simulations.
Xiang Wang   +4 more
doaj   +1 more source

Deformation Characteristics and Mechanical Mechanism of Collapse Accumulation Body After Coal Mine Disaster

open access: yesTaiyuan Ligong Daxue xuebao, 2021
After the occurrence of coal mine disaster, roadway collapse and accumulation often block the roadway and the rescue route. Under this condition, it is particularly difficult to excavate the rescue channel.
Guangbo CHEN   +5 more
doaj   +1 more source

Moisture Distribution and Ice Front Identification in Freezing Soil Using an Optimized Circular Capacitance Sensor

open access: yesSensors
As the interface between frozen and unfrozen soil, the ice front is not only a spatial location concept, but also a potentially dangerous interface where the mechanical properties of soil could change abruptly. Accurately identifying its spatial position
Xing Hu   +5 more
doaj   +1 more source

Study on Deformation and Failure Laws of Surrounding Rock in Layered Rock Roadway by Discrete Element Method

open access: yesMeikuang Anquan, 2020
In order to study the deformation and failure laws of roadway surrounding rock under the condition of layered rock, the one orbit lane of Shandong Yuncheng Coal Mine was taken as the research background, and PFC2D discrete element software was adopted ...
WANG Huifeng, SONG Libing
doaj   +1 more source

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