کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4913232 1428763 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study on interlayer shear properties of ERS pavement system for long-span steel bridges
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Experimental study on interlayer shear properties of ERS pavement system for long-span steel bridges
چکیده انگلیسی


- Best practices of interlayer treatments were proposed for steel bridge pavement.
- Irregular rough interfaces can result in higher interlayer shear strength.
- Low shear rate and high temperature lead to smaller interlayer shear strength.
- Risk of interlayer shear failure raises during hot weather or vehicle speed-changing.

Multi-layer asphalt concrete pavement system on long-span steel bridges is subject to a complex stress and strain state due in part to frequent vehicular braking and accelerating actions and also to relatively weak bond interfaces between pavement layers. In particular, the interlayers are vulnerable to shear activities induced by the aforementioned vehicular actions, leading to spalling, loosening and shoving failures of the pavement. In this study, the interlayer shear performance is investigated experimentally using an innovative test device loaded on existing MTS. Best practices for interlayer composition are proposed based on shear test results, including bonding material and dosage, crushed stone size and dosage, pre-coating treatment of crushed stones, and layer surface treatment. Sensitivity analyses of loading rate and temperature on the interlayer shear performance are conducted as well. It is found that bonding material and surface treatment both can significantly influence the interlayer shear strength. Moreover, slower shear rate and higher temperature can cause poorer interlayer shear performance triggering onset of interlayer shear failures.

An innovative interlayer shear tester is developed for determining and optimizing interlayer shear properties for ERS pavement systems on long-span bridges. Best practices on bonding material selection, aggregate selection and pre-coating, surface treatment for both the steel deck plate and the RA layer are obtained. Sensitive analyses of shear rate and temperature are also conducted on interlayer shear performance for ERS pavement system. It is found that irregular rough interfaces improve the shear performance on interlayers. Lower shear rates and high temperature lead to smaller interlayer shear strength, suggesting that asphalt pavement is more susceptible to interlayer shear failure when vehicles frequently accelerate or brake, or the ambient temperature is high.69

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 143, 15 July 2017, Pages 198-209
نویسندگان
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