影响夯土建筑收缩裂缝发展的因素研究

IF 1.4 4区 工程技术 Q3 ENGINEERING, CIVIL
Xiang Zhao, Cai Hengli, T. Zhou, Ling Liu, Yi-jie Ding
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引用次数: 0

摘要

夯土建筑在世界各地已经存在了数千年,并因其可持续发展的优势而受到越来越多的关注,但其收缩裂缝降低了其承载能力,严重影响了其耐久性和适用性。本研究通过收缩裂缝试验研究了初始含水量、砂砾比、压实程度、厚度以及外加剂(聚丙烯纤维、水泥、水玻璃)对可再生能源建筑收缩裂缝的影响,制备了10组可再生能源样品并在室外干燥开裂。采用裂纹形态几何结构的四个定量参数来评价裂纹的发展。结果表明,这些因素对试件的开裂行为和裂纹形态的几何结构有显著影响。裂纹的形成随试样初始含水量和厚度的增加而加速,随压实程度和砂砾比例的增加而受到限制。掺加1%聚丙烯纤维、10%水泥和0.5体积比水玻璃能显著抑制裂缝的形成和发展。在RE施工中,应综合考虑这些因素,防止收缩裂缝带来的危害。今后还需进一步研究确定添加剂的最佳用量,以促进可再生能源建筑的建设。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on the factors affecting the development of shrinkage cracks of rammed earth buildings
Rammed earth (RE) buildings have existed all over the world for thousands of years, and have gained increasing attention because of its sustainable advantages, however, the shrinkage cracks reduce its bearing capacity and seriously affect its durability and applicability. In this study, the shrinkage cracks test was carried out to investigate the effects of initial water content, proportion of sand and gravel, compaction degree, thickness and the additives (polypropylene fiber, cement and sodium silicate) of shrinkage cracks in RE buildings, ten groups of RE samples were prepared and dried outdoors to crack. Four quantitative parameters of geometrical structure of crack patterns were used to evaluate the development of cracks. The results show that the specimens cracking behavior and the geometrical structure of crack patterns are significantly influenced by these considered factors. The formation of crack can be accelerated with the increase of initial water content and thickness of specimen, while restricted with the increase of the compaction degree and the proportion of sand and gravel. Moreover, the addition of 1% polypropylene fiber, 10% cement and 0.5 volume ratio sodium silicate can significantly restrain the form and development of cracks. In RE construction, these factors should be considered comprehensively to prevent the harm caused by shrinkage cracks. Further works should be carried out to obtain the optimum dosage of the additives, which can benefit the construction of RE buildings in future.
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来源期刊
Earthquakes and Structures
Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
2.90
自引率
20.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response
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