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首页> 外文期刊>Canadian Journal of Civil Engineering >Monolithic and hybrid precast bridge parapets in high and ultra-high performance fibre reinforced concretes
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Monolithic and hybrid precast bridge parapets in high and ultra-high performance fibre reinforced concretes

机译：高性能和超高性能纤维增强混凝土中的整体式和混合式预制桥梁护墙

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摘要

New designs of precast bridge parapets made with fibre reinforced concretes (FRC) were developed using nonlin-ear (mite element calculations. A monolithic FRC parapet and a hybrid FRC parapet were designed. The latter parapet con-sisted of a shell of ultra-high performance FRC paired with a normal strength concrete core. Furthermore, two new anchorage systems were optimized for parapet installation on a new deck or for parapet replacement on an existing structure. Quasi-static tests showed that the load-carry capacity of the parapet designs exceed the PL-2 or TL-4 parapet specifications of CSA and AASHTO. The finite elements model developed in the project has satisfactorily reproduced the stiffness, ulti mate strength, and failure mode of parapets. Additional numerical analyses were conducted for the hybrid parapet to provide design recommendations related to construction aspects and further optimizations.
机译：使用非线性耳（螨元素计算）开发了由纤维增强混凝土（FRC）制成的预制桥梁护墙的新设计。设计了整体式FRC护墙和混合FRC护墙。后者由超高壳组成性能FRC与普通强度混凝土芯配对，此外，还优化了两个新的锚固系统，以在新甲板上安装护栏或在现有结构上更换护栏，准静态测试表明，护栏设计的承载能力超过了根据CSA和AASHTO的PL-2或TL-4护栏规格，在项目中开发的有限元模型令人满意地再现了护栏的刚度，极限强度和破坏模式，并对混合护栏进行了额外的数值分析，以提供有关施工方面和进一步优化的设计建议。

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