مشخصات مقاله:
عنوان فارسی مقاله:
همبستگی میان پارامترهای شدت زلزله و شاخص های تخریب دودکش های بتن مسلح بلند
عنوان انگلیسی مقاله:
Correlation between earthquake intensity parameters and damage indices of high-rise RC chimneys
کلمات کلیدی مقاله:
دودکش ها، همبستگی، پارامتر حرکت زمینی، آسیب ساختاری، اثر طولانی شدن دوره، اثر حالت های بالاتر
مناسب برای رشته های دانشگاهی زیر:
مهندسی عمران
مناسب برای گرایش های دانشگاهی زیر:
زلزله، سازه
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
1. Introduction
2. Ground motion parameters
2.1. A new earthquake intensity measure
2.2. The other ground motion parameters
3. Damage indices
4. Characteristics of the selected high-rise chimney
5. Selection of ground motions
6. Damage and correlation analysis
6.1. Correlation study of the proposed intensity measure
6.2. Correlation between damage measures
7. Conclusions
CRediT authorship contribution statement
Declaration of competing interest
Acknowledgment
قسمتی از مقاله انگلیسی:
1. Introduction
An important aspect of seismic risk analysis is the assessment of expected structural damage caused by a specific earthquake ground motion. The ground motion parameters and the structural damage indices are necessary to estimate the structural damage potential of an earthquake. A good correlation of the ground motion parameters and structural damage indices ensures a more accurate evaluation of seismic performance and an effective reduction in the variability of structural response prediction. As a result, the identification of a promising intensity measure, which sufficiently correlates with structural damage indices, is of considerable significance to the seismic risk assessment of the structures. The high-rise chimneys are tall and long-period structures that will encounter severe structural damage under some earthquakes [1–3]. Wang and Fan [4] investigated failure cases of 739 chimneys and concluded that 19% of them were damaged by earthquakes. The percentage is second only to the damage caused by temperature stress. In 1976, a 180 m RC chimney in Tangshan suffered from an earthquake with magnitude of 7.8 and collapsed at an elevation of 130.5 m due to the 7.1-magnitude aftershock in the same day [4]. In addition, a RC chimney is damaged during the 2007 Niigata-ken Chuetsu-Oki Earthquake in Japan. This chimney is 60 m high, and the damage was observed at the height of approximately 17.5 m from the ground level, where two layers of longitudinal steel bars were changed to one layer [5]. The failure mechanism of chimneys by earthquake action has been investigated by some researchers[6–8]. In the earthquake, the inertial force is much stronger in horizontal directions, which will result in horizontal displacements at each height of the chimney. The chimney will be damaged when it cannot withstand the horizonal inertial force. In addition, the chimneys could also be seriously damaged by torsional stress as it is reported that the rotational components of ground motion may strongly affect response of tall, slender structures [9,10]. After the Tangshan Earthquake (M 7.8 on July 28, 1976) and the Wenchuan Earthquake (M 8.0 on May 12, 2008) in China, researchers investigated the extent of damage of a few masonry chimneys and reinforced concrete chimneys [11,12]. The results indicate that the presentations of earthquake damage are complex, including horizontal and vertical cracks, inclined cracks, torsion failure and collapse etc.