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Performance of RC buildings after Kahramanmaraş Earthquakes: lessons toward performance based design 被引量:2
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作者 Baris Binici Ahmet Yakut +7 位作者 Koray Kadas Ozan Demirel Ugur Akpinar Afsin Canbolat Firat Yurtseven Orkun Oztaskin Selin Aktas Erdem Canbay 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2023年第4期883-894,共12页
Two simultaneous earthquakes occurred in the Kahramanmaraş-Pazarcık and Kahramanmaraş-Elbistan districts of Turkey on February 6,2023,and with magnitudes of 7.7 and 7.6,respectively.These events caused the highest est... Two simultaneous earthquakes occurred in the Kahramanmaraş-Pazarcık and Kahramanmaraş-Elbistan districts of Turkey on February 6,2023,and with magnitudes of 7.7 and 7.6,respectively.These events caused the highest estimated loss recorded in Turkey within the last century from natural disasters.The key reason for the extensive loss was the proximity of eleven cities to the earthquake epicenters.Middle East Technical University teams investigated the building sites in Gaziantep,Kahramanmaras,Hatay,Adiyaman and Adana.The ground motion recordings revealed that in certain locations of Gaziantep,Kahramanmaraşand Hatay,the ground motion levels exceeded the maximum credible earthquake level defined for a return period of 2,475 years in the Turkish Earthquake Code.Residential building performance was investigated with respect to the construction year,which is a good indicator of compliance with modern seismic codes and inspection procedures.About 97%of the collapsed buildings were constructed prior to 2000,whereas over 5,000 buildings,which were built after 2000,collapsed or required urgent demolition.Most of the buildings with minor or greater structural damage sustained heavy infill wall damage rendering occupancy impossible.Aside from damage in older construction with significant structural deficiencies,the damage in some of the more recent and better constructed buildings was observed to be surprisingly poor.This can be attributed to the level of ground motion,significant ductility demands,poor material and workmanship and damage to non-structural elements.With the estimated total loss of above 100 billion dollars and over 50,000 casualties,the current seismic design criterion based on ductility and acceptance of structural damage should be re-evaluated to ensure a more resilient urban environment in high seismic regions. 展开更多
关键词 earthquake damage Kahramanmaras earthquake RC building seismic codes poor performance
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Building damage in Dujiangyan during Wenchuan Earthquake 被引量:14
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作者 Zhang Minzheng and Jin Yingjie Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China Professor Graduate Student 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2008年第3期263-269,共7页
A field damage survey of 1,005 buildings damaged by the Wenchuan Earthquake in Dujiangyan City was carried out and the resulting data was analyzed using the statistical method. It is shown that buildings that were sei... A field damage survey of 1,005 buildings damaged by the Wenchuan Earthquake in Dujiangyan City was carried out and the resulting data was analyzed using the statistical method. It is shown that buildings that were seismically designed achieved the desired seismic fortification target; they sustained less damage than the non-seismically designed buildings. Among the seismically designed buildings investigated, RC frame buildings performed the best in terms of seismic resistance. Masonry buildings with a ground story of RC frame structure were the second best, and masonry buildings performed the worst. Considering building height, multistory buildings sustained more severe damage than high-rise buildings and 2- and 3-story buildings. Compared to residential buildings, public buildings, such as schools and hospitals, suffered more severe damage. 展开更多
关键词 Wenchuan earthquake Dujiangyan building damage seismic intensity field survey
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Damage characteristics and seismic capacity of buildings during Nepal M_s 8.1 earthquake 被引量:11
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作者 Sun Baitao Yan Peilei 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2015年第3期571-578,共8页
The extensive damage to buildings caused by the Nepal Ms8.1 earthquake has attracted much attention by the international community.Afterthe preliminary scientific investigations on the different affected areas inNepal... The extensive damage to buildings caused by the Nepal Ms8.1 earthquake has attracted much attention by the international community.Afterthe preliminary scientific investigations on the different affected areas inNepal,the construction and damage characteristics of five different types of buildings commonly existing in Nepal were discussed and the reasons of their disaster performance were analyzed.Types of buildings investigated include reinforced concrete(RC) frame structures,rubble structures,brick-wood structures,raw soil structures,and brick-wood structures of historic buildings.In addition,the weak links of the seismic design were pointed out,which was very important for the post-earthquake reconstruction and recovery,and gave a preliminary explanations for the damage experienced. 展开更多
关键词 Nepal earthquake seismic damage of building seismi
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Revision of seismic design codes corresponding to building damagesin the “5.12” Wenchuan earthquake 被引量:5
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作者 Wang Yayong Institute of Earthquake Engineering, China Academy of Building Research, Beijing 100013, China 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2010年第2期147-155,共9页
A large number of buildings were seriously damaged or collapsed in the "5.12" Wenchuan earthquake. Based on field surveys and studies of damage to different types of buildings, seismic design codes have been... A large number of buildings were seriously damaged or collapsed in the "5.12" Wenchuan earthquake. Based on field surveys and studies of damage to different types of buildings, seismic design codes have been updated. This paper briefly summarizes some of the major revisions that have been incorporated into the "Standard for classification of seismic protection of building constructions GB50223-2008" and "Code for Seismic Design of Buildings GB50011-2001." The definition of seismic fortification class for buildings has been revisited, and as a result, the seismic classifications for schools, hospitals and other buildings that hold large populations such as evacuation shelters and information centers have been upgraded in the GB50223-2008 Code. The main aspects of the revised GB50011-2001 code include: (a) modification of the seismic intensity specified for the Provinces of Sichuan, Shanxi and Gansu; (b) basic conceptual design for retaining walls and building foundations in mountainous areas; (c) regularity of building configuration; (d) integration of masonry structures and precast RC floors; (e) requirements for calculating and detailing stair shafts; and (f) limiting the use of single-bay RC frame structures. Some significant examples of damage in the epicenter areas are provided as a reference in the discussion on the consequences of collapse, the importance of duplicate structural systems, and the integration of RC and masonry structures. 展开更多
关键词 Wenchuan earthquake earthquake damage to buildings revision of seismic design codes
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Building Damage Extraction from Post-earthquake Airborne LiDAR Data 被引量:2
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作者 DOU Aixia MA Zongjin +1 位作者 HUANG Shusong WANG Xiaoqing 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第4期1481-1489,共9页
Building collapse is a significant cause of earthquake-related casualties; therefore, the rapid assessment of buildings damage is important for emergency management and rescue. Airborne light detection and ranging (L... Building collapse is a significant cause of earthquake-related casualties; therefore, the rapid assessment of buildings damage is important for emergency management and rescue. Airborne light detection and ranging (LiDAR) can acquire point cloud data in combination with height values, which in turn provides detailed information on building damage. However, the most previous approaches have used optical images and LiDAR data, or pre- and post-earthquake LiDAR data, to derive building damage information. This study applied surface normal algorithms to extract the degree of building damage. In this method, the angle between the surface normal and zenith (0) is used to identify damaged parts of a building, while the ratio of the standard deviation to the mean absolute deviation (σ/δ) of θ is used to obtain the degree of building damage. Quantitative analysis of 85 individual buildings with different roof types (i.e., flat top or pitched roofs) was conducted, and the results confirm that post-earthquake single LiDAR data are not affected by roof shape. Furthermore, the results confirm that θ is correlated to building damage, and that σ/δ represents an effective index to identify the degree of building damage. 展开更多
关键词 airborne LiDAR surface normal building damage earthquake damage extraction
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Building damages in Deyang city by the 2008 Wenchuan earthquake 被引量:3
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作者 Wang Qiuliang LiJinggang +2 位作者 Liao Wulin Zhang Lifen Qin Xiaojun 《Geodesy and Geodynamics》 2011年第4期59-63,共5页
The Ms8.0 Wenchuan earthquake in 2008 caused huge casualties, economic losses, and building damages , which are analyzed. The results show that damages of houses designed according to the current seismic code were sig... The Ms8.0 Wenchuan earthquake in 2008 caused huge casualties, economic losses, and building damages , which are analyzed. The results show that damages of houses designed according to the current seismic code were significantly smaller than those without such design, suggesting that the code has achieved the desired goal of seismic fortification. Buildings of different kinds of structures showed large differences in damages : Houses with steel-frames and shear walls or steel structures suffered the least damages ; those with frames or with brick-and-concrete structures suffered more; old cottages, the most. 展开更多
关键词 building damage damage analysis Deyang city Wenchuan earthquake
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Damage to urban buildings in zones of intensities Ⅷ and Ⅶ during the Wenchuan earthquake and discussion on some typical damages 被引量:1
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作者 Jingjiang Sun Yuhong Tang Chao Zheng Hongbin Shi Lin Lin Zhongxian Sun 《Earthquake Science》 CSCD 2009年第2期165-173,共9页
The outline and typical characteristics of damages to building in Jiangyou city and Anxian county (intensity Ⅷ), Mianyang city and Deyang city (intensity Ⅶ) are introduced in the paper. The damage ratios, based ... The outline and typical characteristics of damages to building in Jiangyou city and Anxian county (intensity Ⅷ), Mianyang city and Deyang city (intensity Ⅶ) are introduced in the paper. The damage ratios, based on the sample statistics of multi-story brick buildings together with multi-story brick buildings with RC frame at first story (BBF), are presented. Then some typical damages, such as horizontal cricks of brick masonry buildings, X-shaped cricks on the walls under windows, the damages to columns, beams and infill walls of frame buildings and the damage to half circle-shaped masonry walls, are discussed. 展开更多
关键词 Wenchuan earthquake damage to building seismic intensity
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Study on Seismic Damage to Buildings from the 2016 Hutubi Ms6.2 Earthquake
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作者 Chang Xiangde Sun Jing +4 位作者 Tan Ming Yao Yuan Li Shuai Luo Ju Chen Jianbo 《Earthquake Research in China》 CSCD 2017年第3期334-348,共15页
Based on the field investigation of the building types and damage caused to them by the Hutubi M_S6.2 earthquake on December 8,2016,we analyzed the damage characteristics and causes for different types of buildings. I... Based on the field investigation of the building types and damage caused to them by the Hutubi M_S6.2 earthquake on December 8,2016,we analyzed the damage characteristics and causes for different types of buildings. In conclusion we put forward some suggestions for the restoration and reconstruction in the earthquake affected area in future. 展开更多
关键词 Hutubi earthquake building STRUCTURE earthquake damage damage CAUSES
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Dynamic Characteristics of a Damaged Nine-story Building during the 2011 off the Pacific Coast Tohoku Earthquake
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作者 Tsoggerel Tsamba Masato Motosaka +1 位作者 KazushiYoshida Kazuya Mitsuji 《Journal of Civil Engineering and Architecture》 2012年第8期1039-1046,共8页
This paper describes the dynamic characteristics of a damaged nine story building in Sendal during the 2011 Tohoku Earthquake. Dynamic hysteresis characteristic is investigated. The system identification using the ext... This paper describes the dynamic characteristics of a damaged nine story building in Sendal during the 2011 Tohoku Earthquake. Dynamic hysteresis characteristic is investigated. The system identification using the extended Kalman filter determined the amplitude dependency of natural frequency and damping factor, which are consistent with damage feature. Occurrence of partial uplifting in the transverse direction is suggested by the induced higher harmonics based on the wavelet analysis. Historical change of the amplitude dependent dynamic characteristics is also discussed based on the long-term monitoring data from microtremor level to strong motion level. 展开更多
关键词 2011 Tohoku earthquake dynamic characteristics damaged building long-term monitoring.
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Development of damage probability matrices based on Greek earthquake damage data 被引量:3
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作者 Anastasia K. Eleftheriadou Athanasios I. Karabinis 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2011年第1期129-141,共13页
A comprehensive study is presented for empirical seismic vulnerability assessment of typical structural types, representative of the building stock of Southern Europe, based on a large set of damage statistics. The ob... A comprehensive study is presented for empirical seismic vulnerability assessment of typical structural types, representative of the building stock of Southern Europe, based on a large set of damage statistics. The observational database was obtained from post-earthquake surveys carried out in the area struck by the September 7, 1999 Athens earthquake. After analysis of the collected observational data, a unified damage database has been created which comprises 180,945 damaged buildings from/after the near-field area of the earthquake. The damaged buildings are classified in specific structural types, according to the materials, seismic codes and construction techniques in Southern Europe. The seismic demand is described in terms of both the regional macroseismic intensity and the ratio αg/ao, where αg is the maximum peak ground acceleration (PGA) of the earthquake event and ao is the unique value PGA that characterizes each municipality shown on the Greek hazard map. The relative and cumulative frequencies of the different damage states for each structural type and each intensity level are computed in terms of damage ratio. Damage probability matrices (DPMs) and vulnerability curves are obtained for specific structural types. A comparison analysis is fulfilled between the produced and the existing vulnerability models. 展开更多
关键词 seismic vulnerability observational earthquake damage damage probability matrices (DPMs) vulnerability curves post-earthquake surveys Athens earthquake existing buildings
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Investigation of the Shandan M_S7.3 Earthquake Damage in 1954
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作者 Dong Zhiping Chen Yuhua +2 位作者 Wang Ping Chen Yao Dai Wei 《Earthquake Research in China》 2008年第1期89-100,共12页
On February 11, 1954, an earthquake with Ms7.3 occurred in Shandan county of Hexi corridor,West China. It was the first great earthquake in northwest China after 1949. The earthquake left 47 people dead, 332 people in... On February 11, 1954, an earthquake with Ms7.3 occurred in Shandan county of Hexi corridor,West China. It was the first great earthquake in northwest China after 1949. The earthquake left 47 people dead, 332 people injured and tens of thousands of people homdess; nearly 7277 buildings were damaged or collapsed and the property loss was more than one billion Yuan (RMB) at a rough estimate. In the meizoseismal area, the intensity was Ⅺ, the Hongsihu basin and Shandan County was the most serious damage, and in Shandan, the earthquake-stricken area was 4800 km^2 . In the paper, a brief introduction is presented to the Shandan earthquake, induding the basic parameters, distribution of seismic intensity and natural environment. The characteristics of building destruction are particularly discussed, the earthquake disaster distribution features and economic loss evaluation are also analysed. Finally, causes of the earthquake damage, experiences and lessons as well as implications of protection against earthquake and disaster reduction are summed up. 展开更多
关键词 Shandan Ms7.3 earthquake earthquake damage Seismic intensity building Shandan County
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Lessons learned from the “5.12” Wenchuan Earthquake:evaluation of earthquake performance objectives and the importance of seismic conceptual design principles 被引量:25
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作者 Wang Yayong 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2008年第3期255-262,共8页
Many different types of buildings were severely damaged or collapsed during the May 12, 2008 Great Wenchuan Earthquake. Based on survey data collected in regions that were subjected to moderate to severe earthquake in... Many different types of buildings were severely damaged or collapsed during the May 12, 2008 Great Wenchuan Earthquake. Based on survey data collected in regions that were subjected to moderate to severe earthquake intensities, a comparison between the observed building damage, and the three earthquake performance objectives and seismic conceptual design principles specified by the national "Code for Seismic Design of Buildings GB50011-2001," was carried out. Actual damage and predicted damage for a given earthquake level for different types of structures is compared. Discussions on seismic conceptual design principles, with respect to multiple defense lines, strong column-weak beam, link beam of shear walls, ductility detailing of masonry structures, exits and staircases, and nonstructural elements, etc. are carried out. Suggestions for improving the seismic design of structures are also proposed. It is concluded that the seismic performance objectives for three earthquake levels, i.e., "no failure under minor earthquake level, ""repairable damage under moderate earthquake level" and "no collapse under major earthquake level" can be achieved if seismic design principles are carried out by strictly following the code requirements and ensuring construction quality. 展开更多
关键词 Wenchuan earthquake building damage seismic conceptual design multiple defense lines
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ShakeDaDO:A data collection combining earthquake building damage and ShakeMap parameters for Italy
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作者 Licia Faenza Alberto Michelini +2 位作者 Helen Crowley Barbara Borzi Marta Faravelli 《Artificial Intelligence in Geosciences》 2020年第1期36-51,共16页
In this article,we present a new data collection that combines information about earthquake damage with seismic shaking.Starting from the Da.D.O.database,which provides information on the damage of individual building... In this article,we present a new data collection that combines information about earthquake damage with seismic shaking.Starting from the Da.D.O.database,which provides information on the damage of individual buildings subjected to sequences of past earthquakes in Italy,we have generated ShakeMaps for all the events with magnitude greater than 5.0 that have contributed to these sequences.The sequences under examination are those of Irpinia 1980,Umbria Marche 1997,Pollino 1998,Molise 2002,L’Aquila 2009 and Emilia 2012.In this way,we were able to combine,for a total of the 117,695 buildings,the engineering parameters included in Da.D.O.,but revised and reprocessed in this application,and the ground shaking data for six different variables(namely,intensity in MCS scale,PGA,PGV,SA at 0.3s,1.0s and 3.0s).The potential applications of this data collection are innumerable:from recalibrating fragility curves to training machine learning models to quantifying earthquake damage.This data collection will be made available within Da.D.O.,a platform of the Italian Department of Civil Protection,developed by EUCENTRE. 展开更多
关键词 ShakeMap building damage Italian earthquakes Data collection
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Consequences on the Urban Environment in Greece Related to the Recent Intense Earthquake Activity 被引量:3
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作者 George C. Manos 《Journal of Civil Engineering and Architecture》 2011年第12期1065-1090,共26页
Past earthquake disasters in Greece, during the last thirty years, demonstrate that the severity of destruction is not only due to the intensity of the seismic event but also to the urbanization of the affected region... Past earthquake disasters in Greece, during the last thirty years, demonstrate that the severity of destruction is not only due to the intensity of the seismic event but also to the urbanization of the affected region and the vulnerability of certain types of buildings. Considerable damage was sustained by both old unreinforced masonry structures as well as by relatively new multistory reinforced concrete structures with "soft story" at their ground floor level. The most important observations made during six past earthquake disasters are presented in a summary form and discussed. The most remarkable case of extensive structural damage was caused from the resent Athens 1999 earthquake. The consequent discussion focuses on the following issues: (1) Classification of structural damage and their underlying causes. (2) Repair and strengthening of damaged structures. (3) Upgrade the seismic design. (4) Plans for earthquake preparedness. (5) Assessing the vulnerability of certain type of structures (schools, hospitals, public buildings etc). (6) Education specialized in earthquake engineering. (7) The enrichment of the strong motion data base. 展开更多
关键词 earthquake damage R/C multistory buildings cultural heritage masonry infill soft story
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Characteristics of Seismic Damage of Buildings:Constraints from Tilt Photography Technology
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作者 LIU Jun SHUAI Xianghua +5 位作者 HONG Zhonghua TAN Ming ZHAO Shuo YAO Yuan ZHANG Meng LI Shijie 《Earthquake Research in China》 CSCD 2020年第2期296-306,共11页
In this paper,the tilt photography data acquisition and three-dimensional modeling of the Tashkurgan MS5.5 earthquake in Xinjiang are conducted using the tilt photography system of the Rotor UAV. The three-dimensional... In this paper,the tilt photography data acquisition and three-dimensional modeling of the Tashkurgan MS5.5 earthquake in Xinjiang are conducted using the tilt photography system of the Rotor UAV. The three-dimensional model is used to interpret the earthquake damage on buildings in the mega-earthquake area in order to acquire different-level house damage in the Kuzirun village disaster area. In addition,the characteristics of seismic damage on typical buildings are analyzed. The results show that the main collapsed houses in the mega-earthquake area are sand-stone buildings,of which about 39% are sand-stone buildings. Several brick-wood buildings and brick-concrete buildings are seriously damaged,while the buildings with frame structures are mainly slightly damaged,and the houses near the macro-epicenter of the earthquake are all in good conditions. Three-dimensional tilt photography technology can vividly display the scene of earthquake disaster,and can provide significant demonstration in building damage degree together with detailed analysis of disaster situation. 展开更多
关键词 Tashkurgan MS5.5 earthquake UAV technology Tilt photography earthquake emergency building damage
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泸定地震中典型隔震建筑震害分析 被引量:1
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作者 吴小宾 彭志桢 周定松 《建筑结构》 北大核心 2024年第7期1-7,84,共8页
为落实国务院744号令关于在“两区八类建筑”中推广使用隔震技术的要求,推动隔震技术的健康发展,对位于泸定地震震中的两栋隔震建筑的震害情况进行了调查。分析了某教学行政楼中隔震层的阻尼器及连接件、支墩震害原因,介绍了某宿舍楼的... 为落实国务院744号令关于在“两区八类建筑”中推广使用隔震技术的要求,推动隔震技术的健康发展,对位于泸定地震震中的两栋隔震建筑的震害情况进行了调查。分析了某教学行政楼中隔震层的阻尼器及连接件、支墩震害原因,介绍了某宿舍楼的隔震支座震损情况,对两栋建筑隔离缝等构造处理的不合理导致震损的不足之处进行了全面、系统总结。提出了隔震建筑设计应全专业协调,避免过多设置隔离缝将建筑分割过于零碎;与阻尼器连接支墩需进行剪扭验算;穿越隔震层的设备管道的柔性连接应设置U形段预留变形长度,宽度较大的隔离缝应注意防掉落及通行需求的设计及构造等改进意见。并对隔震结构的施工,产品的检验、验收及建设单位责任提出了相关要求。 展开更多
关键词 泸定地震 隔震建筑 震害分析 黏滞阻尼器 设计建议
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甘肃积石山地震村镇典型建筑震害及成因分析
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作者 聂桂波 杨永强 +4 位作者 张昊宇 谢贤鑫 陈龙伟 王永志 汪云龙 《地震工程与工程振动》 CSCD 北大核心 2024年第3期214-222,共9页
2023年12月18日甘肃省临夏回族自治州积石山发生6.2级地震,此次地震造成了大量的村镇建筑破坏和倒塌,并造成了多人伤亡,是典型的“小震大灾”。文中总结了积石山地震中震区村镇建筑典型震害特点和规律,并结合建筑的结构类型、建造年代... 2023年12月18日甘肃省临夏回族自治州积石山发生6.2级地震,此次地震造成了大量的村镇建筑破坏和倒塌,并造成了多人伤亡,是典型的“小震大灾”。文中总结了积石山地震中震区村镇建筑典型震害特点和规律,并结合建筑的结构类型、建造年代和是否具有抗震构造措施进行了典型案例分析,总结此次地震震损较为严重的原因:部分自建房屋为砖柱和土坯墙,二者缺乏有效连接,自身抗震能力差,这点从同一院落具有圈梁构造柱的房屋基本完好而不具备抗震构造措施的房子破坏严重可以说明;部分房屋不同层存在开间变化导致竖向传力不连续;结构存在大量平面布置不规则的情况;结构局部不完整或存在薄弱部位;农村自建房屋,按照工匠习惯建设,未考虑地震作用下的受力要求,需要建立质量监管体制机制。 展开更多
关键词 积石山地震 震害调查 村镇建筑 结构倒塌 抗震构造措施
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甘肃积石山6.2级地震村镇建筑震害调查与分析
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作者 杨永强 田健叶 +4 位作者 周宝峰 聂桂波 王宏伟 谢贤鑫 戴君武 《地震工程与工程振动》 CSCD 北大核心 2024年第2期208-217,共10页
积石山地震对甘肃和青海部分地区房屋建筑造成了严重破坏。调查了地震烈度7度和8度地区的11个调查点的村镇建筑震害。震害调查表明:地震灾区主要为乡镇和农村地区,房屋结构类型主要为土木、砖木和未设防砖混结构;在烈度8度地区,土木结... 积石山地震对甘肃和青海部分地区房屋建筑造成了严重破坏。调查了地震烈度7度和8度地区的11个调查点的村镇建筑震害。震害调查表明:地震灾区主要为乡镇和农村地区,房屋结构类型主要为土木、砖木和未设防砖混结构;在烈度8度地区,土木结构房屋主要表现为严重破坏或倒塌破坏,砖木结构和未设防砖混结构房屋主要表现为中等破坏和严重破坏,设防砖混和钢筋混凝土框架结构房屋主要表现为轻微破坏和中等破坏;在烈度7度地区,土木结构房屋以中等破坏为主,砖木结构和未设防砖混结构房屋以轻微破坏和中等破坏为主,设防砖混和钢筋混凝土框架结构房屋以轻微破坏和基本完好为主。此次地震震害较同级别地震偏重,与震区复杂地形、地震动峰值放大效应、建筑砌筑质量差和结构受力不合理等因素相关。建议进一步开展复杂地形场地放大效应及频谱影响研究,重视建筑非结构构件抗震宣传与实用技术研发。 展开更多
关键词 积石山地震 村镇建筑震害 构造措施 场地放大效应 非结构构件
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2023年积石山地震重要公共建筑吊顶震害调查分析
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作者 王多智 谢笠 +1 位作者 陈永盛 聂桂波 《地震工程与工程振动》 CSCD 北大核心 2024年第2期218-223,共6页
对2023年6.2级积石山地震中公共建筑内部吊顶开展了震害调查及分析,并以积石山县大河家镇大河家中学教学楼、中西医结合医院门诊楼以及中国邮政银行会议室3处典型震害为例,分析了在以往的公共建筑吊顶震害调查及研究中较少涉及的铝扣板... 对2023年6.2级积石山地震中公共建筑内部吊顶开展了震害调查及分析,并以积石山县大河家镇大河家中学教学楼、中西医结合医院门诊楼以及中国邮政银行会议室3处典型震害为例,分析了在以往的公共建筑吊顶震害调查及研究中较少涉及的铝扣板吊顶、间接悬挂式吊顶的新震害现象及典型震害特征。研究表明:铝扣板边角锋利,卡入式连接对龙骨网格平整度要求较高,此类吊顶如若用于抗震要求较高或人员较为密集的建筑内,建议进行专门的抗震分析,以避免坠板伤人或妨碍人员逃生。此外,在吊顶地震损伤评估中,除坠板率外,还应考虑龙骨网格变形等因素。应加强吊顶中照明单元与主体结构连接的可靠性以避免其在地震中出现大量坠落。研究结果可为公共建筑吊顶抗震研究与工程应用提供参考。 展开更多
关键词 积石山地震 公共建筑 吊顶 震害 铝扣板
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适用于区域建筑群实时震害模拟的LSTM-FC组合深度网络模型研究
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作者 孙海 徐晓君 +3 位作者 邢启航 张孝伟 姜慧 阮雪景 《世界地震工程》 北大核心 2024年第3期46-59,共14页
建筑物破坏在地震灾害中往往会导致巨大损失,对城市建筑群进行灾前灾时的震害预测具有重要意义。传统BP(back propagation)网络和CNN(convolutional neural networks)网络等人工智能方法在进行震害预测时多集中于提取建筑物信息。然而,... 建筑物破坏在地震灾害中往往会导致巨大损失,对城市建筑群进行灾前灾时的震害预测具有重要意义。传统BP(back propagation)网络和CNN(convolutional neural networks)网络等人工智能方法在进行震害预测时多集中于提取建筑物信息。然而,这些方法在处理地震波的时序数据方面有所不足,导致其在整合和分析对地震灾害预测至关重要的时序相关因素时效果有限。因此,本文提出一种耦合LSTM(long short-term memory)和FC(fully connected)神经网络的震害预测方法。LSTM网络擅长处理具有时间序列特性的地震波信息,能够捕捉和分析随时间变化的地震波动模式。同时,全连接网络可用于综合分析所有相关的震害因子。通过对云浮地区265栋典型钢混建筑进行指标量化并确定输入指标(震害影响因子)和输出指标(震害指数),利用LSTM-FC组合深度网络、CNN网络和BP网络模型对数据进行训练并优化。通过将LSTM-FC网络模型的预测结果与弹塑性时程分析比较,发现该模型在拟合效果和精度方面优于传统的BP和CNN模型。拟合效果提升了36.8%和10.6%,精度分别提升了77.6%和91.7%,表明LSTM-FC网络在地震损害预测上更为有效。同时,将该方法应用于广东省云浮市钢混结构群震害预测,构建的易损性矩阵与华南地区的易损性矩阵均值进行了对比,显示误差相对较小,说明该模型不仅理论上可行,在实际应用中也能表现出较高的准确性和有效性。 展开更多
关键词 震害预测 LSTM网络 全连接网络 钢混建筑物
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