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高强混凝土的耐久性设计------外文翻译.doc

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高强混凝土的耐久性设计------外文翻译,abstractenvironmental factors, especially the climate, have significant influence on concrete structure. this paper aims to investigate the harmful effects of maritime climate on the durability of concrete structures built in coastal areas. singly reinforced beam specimens of traditional design a..
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内容介绍
Abstract
Environmental factors, especially the climate, have significant influence on concrete structure. This paper aims to investigate the harmful effects of maritime climate on the durability of concrete structures built in coastal areas. Singly reinforced beam specimens of traditional design and those of densified mixture design algorithm (DMDA) were employed to study the potential problems of concrete structure. Results indicate that cracks on the concrete structure, if go unnoticed, may cause failures. Thus, it is important to know the methodology of achieving high strength and durable concrete in order to avoid formation of cracks in the structural member.
Author Keywords: High-performance concrete; High strength; Durability; Densified mixture design algorithm
摘要:
环境因素,尤其是气候,对混凝土结构有着显著的影响,本文献旨在考察海洋气候对建在沿海地区的混凝土结构耐久性的有害效应。传统的标本单独加强梁设计与高密度配合比的设计算法(DMDA)被使用来研究混凝土结构的潜在问题。结果表明,混凝土结构裂缝,如果不加注意的话可能会导致失稳。因此,为了避免结构构件裂缝的形成,知道使混凝土实现高强度和高耐久性的研究方法很重要。©2001艾斯维尔科技有限责任公司,全权授权。
关键词: High-performance concrete; High strength; Durability; Densified mixture design algorithm
1 介绍
1999年9月21日发生于台湾的灾难性的地震造成了严重的破坏,并且在施工质量的强度、延性和耐久性方面吸引了更多的关注。质量差通常是传统混凝土的缺点。它对用户的财产和生命安全造成危险。相对而言,人们更多的强调混凝土混合物的强度以及和易性,而配合比设计中耐久性从来没有被重视。因此,两种类型的问题浮出水面。一是由于混合物缺乏和易性形成的过度僵硬。为了弥补这样的问题,水量被增加,并导致品质的进一步下降。另外一个是由于水泥的过多使用引起的严重的干燥收缩裂缝。过去,ACI 318-89被用来考虑水灰比并作为一种安全标准。因此,退化、腐蚀、渗水、风化或裂缝现象在许多建筑物的施工后几年内篅@<U庑┒际怯捎诨炷辽杓剖焙鍪幽途眯远鸬睦匣谋曛尽Ⅻbr>
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