Mine blast‐induced ground motion response reduction using semi‐active devices

IF 1.8 3区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Structural Design of Tall and Special Buildings Pub Date : 2023-01-29 DOI:10.1002/tal.2005

Amirreza Ghaffari, H. Ghaffarzadeh

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引用次数: 0

Abstract

The aim of this paper is reducing the responses of structures under the mine blast‐induced ground motion by using semi‐active tools. In other words, the objective of this study is to provide a method to reduce the destructive effects of underground mine‐blast excitation. Investigating the behavior of structures under the mine blast excitation is essential because some buildings are subjected to the blast load of mines due to the rapid urbanization in different regions. Also, the importance of studying this excitation, based on the distinctive nature of mine blast‐induced underground motion, becomes more apparent. For proper investigation and comparison of responses, a seismic excitation is considered. To reduce the responses of two proposed shear structures, magnetorheological (MR) and orifice dampers are utilized. The optimum location for these dampers is investigated. To generate the optimal force each time step the clipped‐optimal algorithm is used based on the input force. The control force can be changed by adjusting the input voltage and magnetic field of dampers. In this research, structural responses based on optimal and maximum voltage are scrutinized. The results indicated that the proposed method is appropriate for reducing the responses of structures under the mine blast‐induced ground motion and seismic excitation.

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利用半主动装置减少矿井爆炸引起的地面运动响应

本文的目的是利用半主动工具减小结构在矿井爆炸地震动作用下的响应。换句话说，本研究的目的是提供一种方法来减少地下矿井爆炸激发的破坏性影响。由于不同地区城市化进程的加快，一些建筑物承受着矿井爆炸荷载，因此研究结构在矿井爆炸激励下的受力特性是十分必要的。此外，基于矿井爆炸诱发地下运动的独特性质，研究这种激励的重要性也变得更加明显。为了进行适当的研究和比较，考虑了地震激励。为了减小两种剪切结构的响应，采用了磁流变阻尼器和孔板阻尼器。研究了这些阻尼器的最佳位置。为了在每个时间步长产生最优力，采用了基于输入力的裁剪优化算法。通过调节阻尼器的输入电压和磁场，可以改变控制力。在本研究中，基于最优电压和最大电压的结构响应进行了仔细研究。结果表明，该方法可以有效地降低结构在矿井爆炸地震动和地震作用下的响应。

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

Structural Design of Tall and Special Buildings 工程技术-工程：土木

CiteScore

5.30

自引率

4.20%

发文量

审稿时长

6-12 weeks

期刊介绍： The Structural Design of Tall and Special Buildings provides structural engineers and contractors with a detailed written presentation of innovative structural engineering and construction practices for tall and special buildings. It also presents applied research on new materials or analysis methods that can directly benefit structural engineers involved in the design of tall and special buildings. The editor''s policy is to maintain a reasonable balance between papers from design engineers and from research workers so that the Journal will be useful to both groups. The problems in this field and their solutions are international in character and require a knowledge of several traditional disciplines and the Journal will reflect this. The main subject of the Journal is the structural design and construction of tall and special buildings. The basic definition of a tall building, in the context of the Journal audience, is a structure that is equal to or greater than 50 meters (165 feet) in height, or 14 stories or greater. A special building is one with unique architectural or structural characteristics. However, manuscripts dealing with chimneys, water towers, silos, cooling towers, and pools will generally not be considered for review. The journal will present papers on new innovative structural systems, materials and methods of analysis.