Seismic performance of compressed earth block walls reinforced with common reeds

IF 6.5 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Case Studies in Construction Materials Pub Date : 2024-06-10 DOI:10.1016/j.cscm.2024.e03388
Mohammad Kamalizad, Reza Morshed
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Abstract

Compressed earth block (CEB) is a sustainable and cost-effective option for eco-friendly constructions. The blocks are produced without burning fossil fuels and have low embodied energy. The abundance of its constituents, including clay and sand, is another merit. However, the susceptibility of CEB constructions against seismic forces is still considered a prominent hindrance to their widespread acceptance. The study aims to improve the in-plane seismic performance of CEB walls by using common reeds as a natural reinforcing material. For this purpose, seven wall panels with dimensions of 1000×900×120 mm3 were constructed. Seismic loading was simulated using an incrementally increasing lateral cyclic displacement combined with a constant vertical stress of 0.3 MPa. The results are discussed in terms of the hysteresis load-displacement responses, displacement ductility, energy dissipation, and stiffness degradation. Based on laboratory experiments, the strength and lateral displacement of the reinforced specimen with four vertical reeds were increased by 44 % and 76 %, respectively, compared to the non-reinforced ones. Ultimately, Seismic assessments and damage indexes of the tested walls indicated that the in-plane seismic performance of CEB walls could be significantly improved by using vertical sand-coated reeds.

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用普通芦苇加固的压缩土块墙的抗震性能
压缩土砌块(CEB)是一种可持续的、具有成本效益的环保建筑选择。这种砌块在生产过程中无需燃烧化石燃料,而且能耗低。另一个优点是其成分丰富,包括粘土和沙子。然而,CEB 建筑易受地震力的影响仍被认为是其被广泛接受的一个突出障碍。本研究旨在利用普通芦苇作为天然加固材料,改善 CEB 墙体的平面抗震性能。为此,研究人员建造了七块尺寸为 1000×900×120 mm3 的墙板。模拟地震荷载时采用了逐渐增大的横向循环位移和 0.3 兆帕的恒定垂直应力。结果从滞后荷载-位移响应、位移延性、能量耗散和刚度退化等方面进行了讨论。根据实验室实验,与非加固试样相比,使用四根垂直苇片的加固试样的强度和侧向位移分别提高了 44% 和 76%。最终,测试墙体的抗震评估和损坏指数表明,使用垂直砂涂层芦苇可显著改善 CEB 墙体的平面抗震性能。
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来源期刊
CiteScore
7.60
自引率
19.40%
发文量
842
审稿时长
63 days
期刊介绍: Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.
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