Earthquake Resistant Engineering Structures XIII最新文献

STRUCTURAL MONITORING FOR SEISMIC DAMAGE EVALUATION: A CASE STUDY 震害评估的结构监测:一个案例研究

Earthquake Resistant Engineering Structures XIII Pub Date : 1900-01-01 DOI: 10.2495/eres210051

S. Anastasia, Pedro Poveda-Martínez, Benjamín TORRES-GORRIZ, Salvador IVORRA-CHORRO

{"title":"STRUCTURAL MONITORING FOR SEISMIC DAMAGE EVALUATION: A CASE STUDY","authors":"S. Anastasia, Pedro Poveda-Martínez, Benjamín TORRES-GORRIZ, Salvador IVORRA-CHORRO","doi":"10.2495/eres210051","DOIUrl":"https://doi.org/10.2495/eres210051","url":null,"abstract":"Seismic events are one of the phenomena with greater influence on the structural condition of bridges and viaducts. For this reason, its design and construction must be carried out under dynamic criteria to guarantee its resistance in a wide range of scenarios. Into the Spanish territory, these requirements are included in the Earthquake-Resistant Construction Standard – NCSE02. However, a large number of structures were built before the appearance of seismic regulations and thus, its indications were not taken into account. In these cases, it is crucial to monitor the behaviour of the structure in order to assess possible damage due to dynamic action. This work presents a case study, focusing on the Santa Ana viaduct, constructed in the Quisi ravine, in Benissa, Alicante (Spain). The rivet structure was built in the early 20th century, being unusual finding similar case studies in the literature. The viaduct, which is in the final stage of its useful life, serves as a bridge for a tram line between neighbouring towns. This work aims at studying the viaduct’s structural modal shapes and damping factor to establish its possible interaction with a seism. To this end, the viaduct was monitored with eighteen accelerometers distributed along its length. Through an acquisition system, the vibrations suffered by the structure were automatically registered after the passage of each train. The signals were subsequently processed using different operational modal analysis techniques. This allows not only to obtain the modal parameters associated with the structure, but also its temporary evolution and therefore, predictively determine the possible appearance of structural damage.","PeriodicalId":290397,"journal":{"name":"Earthquake Resistant Engineering Structures XIII","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121294340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PROPOSAL OF IN SITU PARAMETERS FOR THE ASSESSMENT OF PHYSICAL VULNERABILITY TO SEISMIC EVENTS: A PERUVIAN CASE STUDY 提出地震事件物理脆弱性评估的现场参数:秘鲁案例研究

Earthquake Resistant Engineering Structures XIII Pub Date : 1900-01-01 DOI: 10.2495/eres210021

Luis Izquierdo-Horna, Andrea Galvan

{"title":"PROPOSAL OF IN SITU PARAMETERS FOR THE ASSESSMENT OF PHYSICAL VULNERABILITY TO SEISMIC EVENTS: A PERUVIAN CASE STUDY","authors":"Luis Izquierdo-Horna, Andrea Galvan","doi":"10.2495/eres210021","DOIUrl":"https://doi.org/10.2495/eres210021","url":null,"abstract":"After the last seismic event that occurred in Pisco, Peru in 2007 (7.9 Mw), the fragility of the structural conditions of the existing houses in the Peruvian territory became evident. Therefore, it is important to be able to anticipate or recognize those dwellings that are more physically vulnerable in order to preserve the livelihoods and living conditions of the residents. In this sense, the instruments currently used for this purpose do not guarantee an adequate assessment of reality. Thus, the objective of this research is to propose a set of parameters to determine the level of physical vulnerability present for a given sector based on its structural and constructive characteristics. For this purpose, it was necessary to determine the structural typology of the sector based on the predominant material, number of floors, structural damage and the construction process stage. This information will allow the selection of a set of parameters potentially capable of adequately identifying the level of physical vulnerability in the dwelling. The district of Los Olivos was chosen as a case study. This research resulted in a set of parameters grouped into the following categories: construction system, irregularity and soil condition, roofing system, structural interaction and state of conservation. These categories and their descriptors are applicable and reproducible at different territorial scales.","PeriodicalId":290397,"journal":{"name":"Earthquake Resistant Engineering Structures XIII","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131460967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PROPOSAL OF TERRITORIAL PARAMETERS FOR SEISMIC HAZARD ASSESSMENT IN PISCO, PERU 秘鲁皮斯科地震危险性评估的领土参数建议

Earthquake Resistant Engineering Structures XIII Pub Date : 1900-01-01 DOI: 10.2495/eres210041

Luis Izquierdo-Horna, Patricia Aranibar

{"title":"PROPOSAL OF TERRITORIAL PARAMETERS FOR SEISMIC HAZARD ASSESSMENT IN PISCO, PERU","authors":"Luis Izquierdo-Horna, Patricia Aranibar","doi":"10.2495/eres210041","DOIUrl":"https://doi.org/10.2495/eres210041","url":null,"abstract":"During the last few decades, Peru has experienced numerous natural phenomena (e.g., earthquakes, tsunamis, debris flows, etc.) that have caused considerable economic and human losses. However, the most prevalent phenomenon in Peru is earthquakes due to its geographic location (e.g., Ancash 1970 (7.9 Mw), Pisco 2007 (7.9 Mw), Arequipa 2013 (7.1 Mw), etc.). Therefore, in this research, we focus on improving the techniques for identifying the level of seismic hazard through a set of parameters specific to the territorial conditions. Thus, due to the antecedents presented in the city of Pisco, it has been chosen as a case study. In this sense, a systematic review of parameters and techniques used to determine the level of seismic hazard of a given sector was carried out. Then, the availability of information on the parameters previously identified was evaluated in order to obtain that the most representative variables of the territory are: soil type, slope and soil liquefaction. We consider that this set of parameters is compatible with machine learning techniques or any other method established by the corresponding authorities related to risk and disaster management. Finally, these parameters are applicable and reproducible at any territorial scale.","PeriodicalId":290397,"journal":{"name":"Earthquake Resistant Engineering Structures XIII","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123288322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STRENGTH BALANCE OF STEEL DAMPER COLUMNS AND SURROUNDING BEAMS IN REINFORCED CONCRETE FRAMES 钢筋混凝土框架钢阻尼柱及围梁的强度平衡

Earthquake Resistant Engineering Structures XIII Pub Date : 1900-01-01 DOI: 10.2495/eres210031

K. Fujii, Mizuki Kato

{"title":"STRENGTH BALANCE OF STEEL DAMPER COLUMNS AND SURROUNDING BEAMS IN REINFORCED CONCRETE FRAMES","authors":"K. Fujii, Mizuki Kato","doi":"10.2495/eres210031","DOIUrl":"https://doi.org/10.2495/eres210031","url":null,"abstract":"In earthquake-prone countries, energy dissipated devices (dampers) have recently been widely used in building structures. Their main purpose is to mitigate damage to beams and columns during strong seismic events. The dampers act as energy absorbing members. In this study, the strength balance of steel damper columns and surrounding beams contained in reinforced concrete frames is investigated. First, the damper column strength ratio is defined on the basis of the rigid-perfectly plastic mechanical model. Next, a nonlinear dynamic analysis of various frame models was performed to investigate the influence of the damper column strength ratio on the nonlinear seismic response of reinforced concrete frames containing steel damper columns. The results of the analysis indicate that that the proper strength balance of the steel damper columns and surrounding beams is important in maximizing the energy dissipation into the damper columns. The beam-end section connected to the damper columns needs sufficient strength to avoid premature yielding prior to any energy dissipation. To discuss the strength balance of steel damper columns and surrounding beams, the damper column strength ratio is a possible index.","PeriodicalId":290397,"journal":{"name":"Earthquake Resistant Engineering Structures XIII","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114170411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

EXAMINING THE ADEQUACY OF SEPARATION GAPS BETWEEN ADJACENT BUILDINGS UNDER NEAR-FIELD AND FAR-FIELD EARTHQUAKES 检查近场和远场地震下相邻建筑物之间的间距是否足够

Earthquake Resistant Engineering Structures XIII Pub Date : 1900-01-01 DOI: 10.2495/eres210061

Yazan M. Jaradat, H. Far, A. Saleh

{"title":"EXAMINING THE ADEQUACY OF SEPARATION GAPS BETWEEN ADJACENT BUILDINGS UNDER NEAR-FIELD AND FAR-FIELD EARTHQUAKES","authors":"Yazan M. Jaradat, H. Far, A. Saleh","doi":"10.2495/eres210061","DOIUrl":"https://doi.org/10.2495/eres210061","url":null,"abstract":"Earthquake-induced pounding is a phenomenon that has been observed in almost every major earthquake since the 1960s. Pounding between adjacent buildings occurs due to insufficient separation and with different dynamic properties. This usually causes local damage, and in some extreme cases, total collapse of structures. Building codes in seismically active zones recommended a minimum separation gap between adjacent buildings to avoid pounding during severe earthquakes. AS1170.42007 is an Australian standard that requires 1% of the building height as a minimum separation gap between buildings to preclude pounding. This article presents experimental and numerical results to examine the adequacy of this specification to avoid seismic pounding between steel-frame structures under near-field and far-field earthquakes. It is found that AS1170.4-2007 is inadequate if the shorter building is used to estimate the required separation between adjacent structures under both near-field and far-field earthquakes. The code specification is adequate if the taller building is used to estimate the required separation between adjacent structures under far-field earthquakes only. The results are also compared with corresponding results obtained using the ABS and SRSS methods.","PeriodicalId":290397,"journal":{"name":"Earthquake Resistant Engineering Structures XIII","volume":"263 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122823090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

FRAGILITY ASSESSMENT OF THE INTER-STORY POUNDING RISK BETWEEN ADJACENT REINFORCED CONCRETE STRUCTURES BASED ON PROBABILISTIC SEISMIC DEMAND MODELS 基于概率地震需求模型的相邻钢筋混凝土结构层间冲击风险易损性评估

Earthquake Resistant Engineering Structures XIII Pub Date : 1900-01-01 DOI: 10.2495/eres210011

Maria G. Flenga, M. Favvata

{"title":"FRAGILITY ASSESSMENT OF THE INTER-STORY POUNDING RISK BETWEEN ADJACENT REINFORCED CONCRETE STRUCTURES BASED ON PROBABILISTIC SEISMIC DEMAND MODELS","authors":"Maria G. Flenga, M. Favvata","doi":"10.2495/eres210011","DOIUrl":"https://doi.org/10.2495/eres210011","url":null,"abstract":"The aim of this study is the probabilistic evaluation of the seismic performance of a multistory reinforced concrete (RC) frame structure due to the inter-story pounding effect. The assessment is performed through fragility curves at different performance levels. For this purpose, different probabilistic seismic demand models (PSDMs) are developed based on the real seismic response of the RC structure as a function of the spectral acceleration (Sa). In this direction, the inter-story (floor-tocolumn) pounding between an 8-story RC frame structure and a 3-story rigid barrier (very stiff structure) is examined. Three different initial gap distances (dg) between the adjacent structures are considered. The seismic fragility assessment of the 8-story RC structure without the inter-story pounding effect is also incorporated. Results indicate that the local performances of the columns of the 8-story RC structure are crucial demand parameters for the probabilistic assessment of the inter-story pounding risk. The fragility curves are shifted to lower values of Sa due to the pounding effect in comparison to the corresponding cases without pounding, while the probability of pounding between the examined structures is increased as the separation gap distance dg decreases. Nevertheless, the more exigent the performance level is the fragility curves move towards greater values of earthquake intensity.","PeriodicalId":290397,"journal":{"name":"Earthquake Resistant Engineering Structures XIII","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125467063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1