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Rapid report of seismic damage to hospitals in the 2023 Turkey earthquake sequences

Earthquake Research Advances 2023年第4期3卷 3-26页

作者： Zhe Qu Feijian Wang Xiangzhao Chen Xiaoting Wang Zhiguang Zhou Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementBeijing100054China College of Civil Engineering Tongji UniversityShanghai200092China

The seismic performance of medical systems is crucial for the seismic resilience of *** report summarizes the observed damage to twelve hospital buildings in the area affected by the MW 7.8 and MW 7.5 earthquakes on February 6,2023 in *** include five base-isolated buildings and seven fixed-base buildings in southcentral Turkey's seven most heavily affected *** relating the post-quake occupancy statuses of the hospitals with the estimated seismic demands during the earthquake doublet,the report offers the following observations:(1)the base-isolated hospital buildings on friction pendulum bearings generally exhibited superior performance of achieving the goal of immediate occupancy and provided better protection for nonstructural elements than fixed-base counterparts did;(2)the fixed-base hospital buildings of reinforced concrete structures constructed after 2001 successfully achieved the goal of collapse prevention even under very high seismic demands;(3)some fixed-base hospitals also remained operational even if they were very close to the fault rupture and were subjected to higher-than-design-level earthquake ground motions.

关键词： Medical facility Base isolation Friction pendulum bearing Near-fault region Immediate occupancy nonstructural element Seismic resilience RC frame Collapse prevention

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Rapid report of seismic damage to buildings in the 2022 M 6.8 Luding earthquake,China

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Earthquake Research Advances 2023年第1期3卷 11-30页

作者： Zhe Qu Baijie Zhu Yuteng Cao Haoran Fu Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationNo.1 Chaobai StreetYanjiaoSanheHebei065201China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementChina

The report summarizes the observed damage to a variety of buildings near the epicenter of the M6.8 Luding earthquake in Sichuan Province,*** include base-isolated buildings,multi-story reinforced concrete(RC)frame buildings,and masonry *** near-field region is known to be tectonically highly active,and the local intensity level is the highest,that is,0.4g peak ground acceleration(PGA)for the design basis earthquake,in the Chinese zonation of seismic ground motion *** extent of damage ranged from the weak-story collapse that claimed lives to the extensive nonstructural damage that suspended *** report highlights the first observation of the destruction of rubber bearings and viscous dampers in the isolation layer of Chinese seismically isolated *** also features the rare observation of the brittle shear failure of RC columns in moment-resisting frames in a region of such a high seismic design *** reasons that may have attributed to the reported damage are suggested by providing facts observed in the ***,careful forensic analyses are needed before any conclusive judgment can be made.

关键词： Base isolation Rubber bearing Viscous damper Reinforced concrete frame Masonry structure Weak-story collapse Near-fault area Terrace riser nonstructural element

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维普期刊数据库

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A novel control strategy for reproducing the floor motions of high-rise buildings by earthquake-simulating shake tables

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Earthquake Research Advances 2024年第1期4卷 67-75页

作者： Yuteng Cao Zhe Qu Xiaodong Ji Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin150080China Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry Department of Civil EngineeringTsinghua UniversityBeijing100084China

To enable the experimental assessment of the seismic performance of full-scale nonstructural elements with multiple engineering parameters(EDPs),a three-layer testbed named nonstructural element Simulator on Shake Table(NEST)has been *** testbed consists of three consecutive floors of steel *** bottom two floors provide a space to accommodate a full-scale *** fully explore the flexibility of NEST,we propose a novel control strategy to generate the required shake table input time histories for the testbed to track the target floor motions of the buildings of interest with high *** control strategy contains two parts:an inverse dynamic compensation via simulation of feedback control systems(IDCS)algorithm and an offline iteration procedure based on a refined nonlinear numerical model of the *** key aspects of the control strategy were introduced in this *** tests were conducted to simulate the seismic responses of a full-scale office room on the 21^(st)floor of a 42-story high-rise *** test results show that the proposed control strategy can reproduce the target floor motions of the building of interest with less than 20%errors within the specified frequency range.

关键词： Shake table test nonstructural element High-rise building Open-loop IDCS algorithm Off-line iteration

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维普期刊数据库

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