Rammed earth construction for sustainable and seismic-resilient buildings: structural advances and constraints methods

IF 3.9 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Peng Ning, Yonglin Gao, Abdul Ghafar Wahab, Tao Zhong, Wenfeng Bai, Wang Yang
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Abstract

Rammed earth construction, known for its sustainability and aesthetic appeal, has traditionally faced limitations in terms of seismic performance owing to the inherent properties of the material. This study addresses these limitations by investigating the seismic behavior of rammed earth walls enhanced with different structural constraints and material compositions. Nine test models, all of the same size but produced using distinct construction techniques and material mixes (Mixes 1 and 2), were categorized into three series: unconstrained rammed earth walls (W1-1 to W1-3), reinforced concrete frame-constrained walls (W2-1 to W2-3), and steel frame-constrained walls (W3-1 to W3-3). Low-cycle repeated loading tests were conducted to evaluate the structural responses. The results showed that the reinforced concrete and steel frame constraints significantly improved the load-bearing capacity and deformation resistance of the walls. The unconstrained walls exhibited a minimum cracking load and ultimate load of 245 and 382 kN, respectively. In contrast, the reinforced concrete frame-constrained walls achieved superior performance, with a minimum cracking load and ultimate load of 400 and 597 kN, respectively. The steel frame-constrained walls displayed intermediate results, with a minimum cracking load of 338 kN and an ultimate load of 554 kN. Additionally, the specimens using Mix 2 (W1-3, W2-3, and W3-3) demonstrated the highest energy dissipation. These findings provide valuable insights for designing earthquake-resistant rammed-earth wall systems, highlighting the crucial role of structural constraints and material composition in enhancing seismic resilience.

Abstract Image

夯土建设可持续和抗震建筑:结构的进步和约束方法
夯土建筑以其可持续性和美学吸引力而闻名,由于材料的固有特性,传统上在抗震性能方面面临限制。本研究通过研究不同结构约束和材料组成增强夯土墙的抗震性能来解决这些局限性。9个测试模型,都是相同的尺寸,但使用不同的施工技术和材料混合物(混合物1和2),被分为三个系列:无约束夯土墙(W1-1至W1-3),钢筋混凝土框架约束墙(W2-1至W2-3)和钢框架约束墙(W3-1至W3-3)。进行了低周重复加载试验,以评估结构响应。结果表明,钢筋混凝土和钢框架约束显著提高了墙体的承载能力和抗变形能力。无约束墙体的最小开裂荷载为245 kN,极限荷载为382 kN。相比之下,钢筋混凝土框架约束墙的性能更优,最小开裂荷载为400 kN,极限荷载为597 kN。钢框架约束墙体表现为中等水平,最小开裂荷载为338 kN,极限荷载为554 kN。此外,使用Mix 2的试件(W1-3、W2-3和W3-3)表现出最高的能量耗散。这些发现为设计抗震夯土墙系统提供了有价值的见解,突出了结构约束和材料成分在增强抗震能力方面的关键作用。
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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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