预测灌浆混凝土砌体抗压强度的可靠单位强度相关性

IF 3.4 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Materials and Structures Pub Date : 2024-07-17 DOI:10.1617/s11527-024-02417-8
Julian Thamboo, Mathavanayakam Sathurshan, Tatheer Zahra
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引用次数: 0

摘要

灌浆混凝土砌体的抗压强度是设计加固/灌浆混凝土砌体墙的一个重要参数。设计标准规定了两种确定砌体抗压强度的方法:(1) 使用表列的单位强度和砂浆类型;(2) 测试具有代表性的砌体棱柱体。灌浆混凝土砌体的抗压强度预测受空心砌块、砂浆和灌浆料的抗压强度值及其几何形状的影响。因此,本研究采用了一种多层次的方法来改进现有的单位强度相关标准,以便更可靠地预测灌浆混凝土砌体的抗压强度。研究人员对确定灌浆砌体抗压强度的现有方法进行了严格评估,并开发了一个灌浆混凝土砌体棱柱体/小方柱抗压试验数据库。然后利用该数据库评估砌块、砂浆、灌浆料和砌体抗压强度之间的相关性。评估了设计标准和文献中现有单位强度相关性的适用性,并强调了其相关性和局限性。随后,通过对照数据库中的实验结果对预测结果进行统计可靠性分析,本研究提出了更新的单位强度相关系数集。根据砂浆类型/强度(≤ 10 兆帕和 > 10 兆帕)对提出的单位强度相关性进行了分类。通过比较第 95 百分位误差值,可以看出新的相关系数在结构上比现有的单位强度相关系数更可靠。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Reliable unit strength correlations to predict the compressive strength of grouted concrete masonry

Compressive strength of grouted concrete masonry is an important parameter to design reinforced/grouted concrete masonry walls. The design standards stipulate two methods to determine the compressive strength of masonry (1) using tabulated unit strength and mortar type, and (2) testing representative masonry prisms. The compressive strength prediction of grouted concrete masonry is influenced by compressive strength values of hollow blocks, mortar and grout, and their geometries. Therefore, a multi-level approach was employed in this study to improve the existing unit strength correlations of the standards for more reliable prediction of compressive strengths of grouted concrete masonry. The existing methods to determine the compressive strength of grouted masonry were critically appraised and a database of compression tests of grouted concrete masonry prisms/wallettes was developed. This database was then used to evaluate the correlations between the compressive strengths of block, mortar, grout and masonry. The applicability of existing unit strength correlations from the design standards and literature were assessed and their relevancy and limitations are highlighted. Subsequently, updated sets of unit strength correlations are proposed in this study, through statistical reliability analyses of the predictions against the experimental results included in the database. The proposed unit strength correlations were classified according to the mortar type/strengths (≤ 10 MPa and > 10 MPa). It has been shown that the new correlations are more structurally reliable than the existing unit strength correlations through comparing the 95th percentile error values.

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来源期刊
Materials and Structures
Materials and Structures 工程技术-材料科学:综合
CiteScore
6.40
自引率
7.90%
发文量
222
审稿时长
5.9 months
期刊介绍: Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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