Study on properties of reinforced concrete structures in seismic regions

IF 6 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2024-06-25 DOI:10.1016/j.asej.2024.102927

Ke Li

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Abstract

This paper aims to explore the effects of earthquakes on the properties of medium-height reinforced concrete houses in China. The results demonstrated a significant decrease in ultrasonic resonance frequency, indicating structural damage, with reductions of 26.5 %, 30.2 %, and 37 % observed for earthquakes of magnitudes 5.0, 5.3, and 5.7, respectively. Similarly, the dynamic modulus of elasticity exhibited a reduction of over 50 %. Measurements of carbonation depth revealed values of 34.65 mm, 38.97 mm, and 46.12 mm for earthquakes of magnitudes 5.0, 5.3, and 5.7, respectively. Accordingly, the percentage of mass loss amounted to 22.17 %, 36.87 %, and 49.78 %. Furthermore, experiments identified the least favourable outcomes during maximum seismic activity, with a recorded peak stress of 447.3 MPa at a deformation of 0.63 mm. These findings contribute to a better understanding of the impact of seismic events on reinforced concrete structures and the associated corrosion mechanisms.

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地震区钢筋混凝土结构性能研究

本文旨在探讨地震对中国中等高度钢筋混凝土房屋性能的影响。结果表明，在 5.0 级、5.3 级和 5.7 级地震中，表明结构损坏的超声波共振频率分别降低了 26.5%、30.2% 和 37%。同样，动态弹性模量也降低了 50%以上。在 5.0 级、5.3 级和 5.7 级地震中，碳化深度的测量值分别为 34.65 毫米、38.97 毫米和 46.12 毫米。因此，质量损失百分比分别为 22.17%、36.87% 和 49.78%。此外，实验还发现，在最大地震活动期间，记录到的峰值应力为 447.3 兆帕，变形量为 0.63 毫米，结果最不理想。这些发现有助于更好地理解地震活动对钢筋混凝土结构的影响以及相关的腐蚀机制。

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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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.