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原文传递 Integral Abutment Bridge for Louisiana’s Soft and Stiff Soils. TECH SUMMARYMarch 2016.

题名：	Integral Abutment Bridge for Louisiana’s Soft and Stiff Soils. TECH SUMMARYMarch 2016.
作者：	Voyiadjis, G. Z.; Cai, S.; Alshibili, K.; Faghihi, D.; Kong, B.; Yang, Y.
关键词：	Superpave mix design, Asphalt bridge deck, Susceptibility analyses, Louisiana, Geotechnical behaviors, Performance, Rutting models, Gradation analysis, Volumetric properties, Evaluation, Shear cracks, Louisiana Department of Transportation and Development(LADOTD)
摘要：	Integral abutment bridges (IABs) have been designed and constructed in some US states over the past few decades. The initial purpose of building such bridges was to eliminate the expansion joints and resolve the joint-induced problems. Although IABs have been widely accepted due to their satisfying performance, they have not been largely applied in practice because of uncertainties on the structural and geotechnical behaviors of such bridges under the temperature variations, shrinkage and creep of materials, traffi c loads, etc. Recently, the fi rst two full IABs were constructed on soft and stiff soil conditions in Louisiana by the Louisiana Department of Transportation and Development (DOTD). This report presents the fi eld instrumentation plans and monitoring results for two bridges: Caminada Bay Bridge, constructed on mainly fi ne sand and silty sand deposit, and Bodcau Bayou Bridge, constructed on a relatively lean and fat clay with low plasticity. The IAB system is gaining wider acceptability in the US and worldwide mainly because of the reduced initial costs, lower long-term maintenance expenses, and improved riding quality. Louisiana’s experience has been limited to the construction of semi-integral abutment bridges in stiff soils only. No full integral abutment bridges have been used in Louisiana so far. Success and eff ectiveness of the IAB system is dependent on proper understanding of the soil-structure interaction and behavior of components as well as the full system. It is particularly important as soft soils in Louisiana are known for their poor strength quality from the engineering point of view.
总页数：	Voyiadjis, G. Z.; Cai, S.; Alshibili, K.; Faghihi, D.; Kong, B.; Yang, Y.
报告类型：	科技报告