Numerical Modeling of Composite Materials for the Alleviation of Manhole Decrement Into Pavement

Lin, Jyh Dong; Chen, Hao Hsien; Huang, Wei; Weng, Yi Wei; Yeh, Li Hsu; Sung, Po Hsun

doi:10.1166/asl.2012.3921

Cited by 2 publications

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“…Brown and Brown [11] concluded that the failures of pavement around the manhole are probably caused by a combination of shear and tensile stresses induced by the differential vertical stiffness of the pavement and the chamber. Lin et al [12] found that the maximum principal strain in the horizontal direction occurs at the bottom of the overlaying course in the pavement, where the maximum compressive strain in the vertical direction occurs at the interface between the manhole cover and the around asphalt concrete pavement.…”

Section: Introductionmentioning

confidence: 99%

Response Characteristics Analysis and Fatigue Life Assessment of Asphalt Pavement around the Manhole

Zhang¹,

Zhao

Chen

2020

Shock and Vibration

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In view of the damage of the pavement around manholes, this paper proposes an effective way to analyse the stress characteristics of the road under vehicle load and evaluate the fatigue life of the pavement around manholes. A half vehicle-road-manhole cover coupling dynamic model is established to calculate the dynamic load coefficient. According to the finite element analysis (FEA) model in ABQUS, the dynamic response characteristics of the pavement around the manhole are analysed, and the stresses under different braking force and different vehicle type are compared. In addition, the fatigue life of the pavement surface layer under different loading conditions is calculated, and three different fatigue life models are selected to analyse the influence of different factors on the fatigue life of the pavement base structure around the manhole. The results show that the fatigue life of the pavement base layer decreases with the increase of manhole subsidence value, and the fatigue life increases with the increase in thickness of the surface layer, and the change of elastic modulus of the subgrade has no obvious influence on the fatigue life of road base. Finally, a fatigue life evaluation index based on high root energy is proposed to compare the three models more intuitively. Consequently, the analysis results can provide a basis for manhole surrounding pavement design and maintenance, and the analysis method is worthy of further application in the research of pavement fatigue life under more influencing factors.

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Section: Introductionmentioning

confidence: 99%

Response Characteristics Analysis and Fatigue Life Assessment of Asphalt Pavement around the Manhole

Zhang¹,

Zhao

Chen

2020

Shock and Vibration

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“…Moreover, the foremost hatch cover was strengthened to withstand a 50% higher load than the standard because it is easier to manufacture complex geometry in case of the composite materials [8]. In case of the manhole covers underneath pavement surface, under heavy traffic loads, a novel material was proposed that is a combination of two-layers: one layer made of modified asphalt concrete as the base and a layer made of dense-graded asphalt concrete [13].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Testing of the Sandwich Composite Manhole Cover Designed for Pedestrian Networks

2019

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This research concerning the topic, pursues the design, manufacturing, analysis and testing of the manhole cover that may be used in pedestrian networks. Although there are certain commercially available manhole covers made of glass-reinforced composites, there are a few papers published related to the modelling, simulation and mechanical testing of such parts. Herein, the manhole cover is made of the sandwich composite. The novelty of this kind of cover is to use an oriented strand board (OSB) as the core between two sides containing layers, which are reinforced with glass fibers. The OSB core leads to the increase of the stiffness-weight ratio. The paper describes the materials corresponding to the layers of the composite cover, geometry of the cover, technology used to manufacture the bending specimens and cover tested. Specimens made of materials that correspond to each layer of the cover, are tested in bending in order to determine their mechanical properties (flexural strength and flexural modulus). Bending tests and testing of the cover are also described. The composite manhole cover is also analysed by the finite element method to obtain the state of stresses and strains. The strains of the manhole cover are experimentally measured by using the tensometric method. Finally, comparing the strains with the strains experimentally measured validates the numerical simulation model.

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Numerical Modeling of Composite Materials for the Alleviation of Manhole Decrement Into Pavement

Cited by 2 publications

References 0 publications

Response Characteristics Analysis and Fatigue Life Assessment of Asphalt Pavement around the Manhole

Response Characteristics Analysis and Fatigue Life Assessment of Asphalt Pavement around the Manhole

Modeling and Testing of the Sandwich Composite Manhole Cover Designed for Pedestrian Networks

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