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期刊论文 31

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Nd-YAG 1

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再电气化；碳中和；能源转型；电能替代 1

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Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

《结构与土木工程前沿（英文）》 2013年 第7卷 第4期   页码 341-355 doi: 10.1007/s11709-013-0221-y

摘要： The most critical drawback in currently used steel reinforcement in reinforced concrete (RC) structures is susceptibility to accumulation of plastic deformation under excessive loads. Many concrete structures due to damaged (yielded) steel reinforcement have undergone costly repairs and replacements. This research presents a new type of shape memory alloy (SMA)-based composite reinforcement with ability to withstand high elongation while exhibiting pseudo-elastic behavior. In this study, small diameter SMA wires are embedded in thermoset resin matrix with or without additional glass fibers to develop composite reinforcement. Manufacturing technique of new proposed composite is validated using microscopy images. The proposed SMA-FRP composite square rebars are first fabricated and then embedded in small scale concrete T-beam. 3-point bending test is conducted on manufactured RC beam using a cyclic displacement controlled regime until failure. It is found that the SMA-FRP composite reinforcement is able to enhance the performance of concrete member by providing re-centering and crack closing capability.

关键词： re-centering     shape memory alloys     concrete     composite     fiber reinforced polymer     scanning electron microscopy    

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Experimental study of the restoring force mechanism in the self-centering beam (SCB)

Abhilasha MAURYA,Matthew R. EATHERTON

《结构与土木工程前沿（英文）》 2016年 第10卷 第3期   页码 272-282 doi: 10.1007/s11709-016-0346-x

摘要： In the past, several self-centering (SC) seismic systems have been developed. However, examples of self-centering systems used in practice are limited due to unusual field construction practices, high initial cost premiums and deformation incompatibility with the gravity framing. A self centering beam moment frame (SCB-MF) has been developed that mitigates several of these issues while adding to the advantages of a typical SC system. The self-centering beam (SCB) is a shop-fabricated, self-contained structural component that when implemented in a moment resisting frame can bring a building back to plumb after an earthquake. This paper describes the SCB concepts and experimental program on five SCB specimens at two-third scale relative to a prototype building. Experimental results are presented including the global force-deformation behavior. The SCBs are shown to undergo 5%–6% story drift without any observable damage to the SCB body and columns. Strength equations developed for the SCB predict the moment capacity well, with a mean difference of 6% between experimental and predicted capacities. The behavior of the restoring force mechanism is described. The limit states that cause a loss in system's restoring force which lead to a decrease in the self-centering capacity of the SCB-MF, are presented.

关键词： self-centering seismic system     seismic design     hysteretic behavior     restoring force     resilient structural system    

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Parametric study on seismic performance of self-centering reinforced concrete column with bottom-placed

《结构与土木工程前沿（英文）》   页码 1145-1162 doi: 10.1007/s11709-023-0945-2

摘要： To realize seismic-resilient reinforced concrete (RC) moment-resisting frame structures, a novel self-centering RC column with a rubber layer placed at the bottom (SRRC column) is proposed herein. For the column, the longitudinal reinforcement dissipates seismic energy, the rubber layer allows the rocking of the column, and the unbonded prestressed tendon enables self-centering capacity. A refined finite element model of the SRRC column is developed, the effectiveness of which is validated based on experimental results. Results show that the SRRC column exhibits stable energy dissipation capacity and no strength degradation; additionally, it can significantly reduce permanent residual deformation and mitigate damage to concrete. Extensive parametric studies pertaining to SRRC columns have been conducted to investigate the critical factors affecting their seismic performance.

关键词： seismic resilience     self-centering     rubber layer     flag-shaped hysteresis loop     parametric study    

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Probabilistic safety assessment of self-centering steel braced frame

Navid RAHGOZAR, Nima RAHGOZAR, Abdolreza S. MOGHADAM

《结构与土木工程前沿（英文）》 2018年 第12卷 第1期   页码 163-182 doi: 10.1007/s11709-017-0384-z

摘要： The main drawback of conventional braced frames is implicitly accepting structural damage under the design earthquake load, which leads to considerable economic losses. Controlled rocking self-centering system as a modern low-damage system is capable of minimizing the drawbacks of conventional braced frames. This paper quantifies main limit states and investigates the seismic performance of self-centering braced frame using a Probabilistic Safety Assessment procedure. Margin of safety, confidence level, and mean annual frequency of the self-centering archetypes for their main limit states, including PT yield, fuse fracture, and global collapse, are established and are compared with their acceptance criteria. Considering incorporating aleatory and epistemic uncertainties, the efficiency of the system is examined. Results of the investigation indicate that the design of low- and mid-rise self-centering archetypes could provide the adequate margin of safety against exceeding the undesirable limit-states.

关键词： self-centering steel braced frame     mean annual frequency     safety assessment     confidence level     margin of safety    

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Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

《结构与土木工程前沿（英文）》 2011年 第5卷 第3期   页码 323-334 doi: 10.1007/s11709-011-0119-5

摘要： Post-tensioned (PT) self-centering moment frames have been developed as an alternative to typical moment-resisting frames (MRFs) for earthquake resistance. When a PT frame deforms laterally, gaps between the beams and columns open. However, the gaps are constrained by the columns and the slab in a real PT self-centering building frame. This paper presents a methodology for evaluating the column restraint and beam compression force based on the column deformation and gap openings at all stories. The method is verified by cyclic tests of a full-scale, two-bay by one-story PT frame. Moreover, a sliding slab is proposed to minimize restraints on the expansion of the PT frame. Shaking table tests were conducted on a reduced-scale, two-by-two bay one-story specimen, which comprises one PT frame and two gravitational frames. The PT frame and gravitational frames are self-centering throughout the tests, responding in phase with only minor differences in peak drifts caused by expansion of the PT frame. When the specimen is excited by a simulation of the 1999 Chi-Chi earthquake with a peak ground acceleration of 1.87 g, the maximum interstory drift and the residual drift are 7.2% and 0.01%, respectively.

关键词： post-tensioned frame     frame expansion     column restraint     sliding slab     frame test     shake table test    

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Parametric study of hexagonal castellated beams in post-tensioned self-centering steel connections

Hassan ABEDI SARVESTANI

《结构与土木工程前沿（英文）》 2019年 第13卷 第5期   页码 1020-1035 doi: 10.1007/s11709-019-0534-6

摘要： The effects of important parameters (beam reinforcing plates, initial post-tensioning, and material properties of steel angles) on the behavior of hexagonal castellated beams in post-tensioned self-centering (PTSC) connections undergone cyclic loading up to 4% lateral drift have been investigated by finite element (FE) analysis using ABAQUS. The PTSC connection is comprised of bolted top and bottom angles as energy dissipaters and steel strands to provide self-centering capacity. The FE analysis has also been validated against the experimental test. The new formulations derived from analytical method has been proposed to predict bending moment of PTSC connections. The web-post buckling in hexagonal castellated beams has been identified as the dominant failure mode when excessive initial post-tensioning force is applied to reach greater bending moment resistance, so it is required to limit the highest initial post-tensioning force to prevent this failure. Furthermore, properties of steel material has been simulated using bilinear elastoplastic modeling with 1.5% strain-hardening which has perfectly matched with the real material of steel angles. It is recommended to avoid using steel angles with high yielding strength since they lead to the yielding of bolt shank. The necessity of reinforcing plates to prevent beam flange from local buckling has been reaffirmed.

关键词： finite element analysis     hexagonal castellated beam     parametric study     post-tensioned self-centering steel connection     steel moment-resisting frame    

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Validation of a steel dual-core self-centering brace (DC-SCB) for seismic resistance: from brace member

Chung-Che CHOU,Ping-Ting CHUNG,Tsung-Han WU,Alexis Rafael Ovalle BEATO

《结构与土木工程前沿（英文）》 2016年 第10卷 第3期   页码 303-311 doi: 10.1007/s11709-016-0347-9

摘要： A steel dual-core self-centering brace (DC-SCB) is an innovative structural member that provides both energy dissipation and self-centering properties to structures, reducing maximum and residual drifts of structures in earthquakes. The axial deformation capacity of the DC-SCB is doubled by a parallel arrangement of two inner cores, one outer box and two sets of tensioning elements. This paper presents cyclic test results of a DC-SCB component and a full-scale one-story, one-bay steel frame with a DC-SCB. The DC-SCB that was near 8 m-long was tested to evaluate its cyclic behavior and durability. The DC-SCB performed well under a total of three increasing cyclic loading tests and 60 low-cycle fatigue loading tests without failure. The maximum axial load of the DC-SCB was near 1700 kN at an interstory drift of 2.5%. Moreover, a three-story dual-core self-centering braced frame (DC-SCBF) with a single-diagonal DC-SCB was designed and its first-story, one-bay DC-SCBF subassembly specimen was tested in multiple earthquake-type loadings. The one-story, one-bay subassembly frame specimen performed well up to an interstory drift of 2% with yielding at the column base and local buckling in the steel beam; no damage of the DC-SCB was found after all tests. The maximum residual drift of the DC-SCBF caused by beam local buckling was 0.5% in 2.0% drift cycles.

关键词： dual-core self-centering brace (DC-SCB)     braced frame tests     residual deformation    

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2014—2016年食品动物源RE-cmeABC阳性弯曲菌流行与耐药性现状 Article

刘德俊, 刘蔚雯, 李星, 姚红, 沈张奇, 汪洋, 沈建忠

《工程（英文）》 2020年 第6卷 第1期   页码 34-39 doi: 10.1016/j.eng.2019.10.013

摘要： 因此，本研究调查了2014—2016年连续三年间我国山东、上海和广东等三个重点养殖区食品动物源RE-cmeABC阳性弯曲菌的流行与耐药性现状。）结肠弯曲菌，空肠弯曲菌中RE-cmeABC的阳性率显著高于结肠弯曲菌。111株RE-cmeABC阳性空肠弯曲菌与46株RE-cmeABC阴性空肠弯曲菌相比在氟苯尼考、克林霉素和红霉素的耐药率上具有显著差异（P <然而，携带RE-cmeABC的菌株可以使环丙沙星与四环素对弯曲菌的MIC值分布趋于更高水平范围。本研究表明RE-cmeABC已在我国食品动物源弯曲菌中广泛流行，对公共卫生安全具有潜在威胁。

关键词： RE- cmeABC     弯曲菌     环丙沙星     氟苯尼考    

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Development of small-molecule viral inhibitors targeting various stages of the life cycle of emerging and re-emerging

null

《医学前沿（英文）》 2017年 第11卷 第4期   页码 449-461 doi: 10.1007/s11684-017-0589-5

摘要：

In recent years, unexpected outbreaks of infectious diseases caused by emerging and re-emerging viruses have become more frequent, which is possibly due to environmental changes. These outbreaks result in the loss of life and economic hardship. Vaccines and therapeutics should be developed for the prevention and treatment of infectious diseases. In this review, we summarize and discuss the latest progress in the development of small-molecule viral inhibitors against highly pathogenic coronaviruses, including severe acute respiratory syndrome coronavirus and Middle East respiratory syndrome coronavirus, Ebola virus, and Zika virus. These viruses can interfere with the specific steps of viral life cycle by blocking the binding between virus and host cells, disrupting viral endocytosis, disturbing membrane fusion, and interrupting viral RNA replication and translation, thereby demonstrating potent therapeutic effect against various emerging and re-emerging viruses. We also discuss some general strategies for developing small-molecule viral inhibitors.

关键词： emerging and re-emerging viruses     small-molecule inhibitor     coronavirus     Ebola virus     Zika virus     life cycle    

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Self-centering steel plate shear walls for improving seismic resilience

Patricia M. CLAYTON,Daniel M. DOWDEN,Chao-Hsien LI,Jeffrey W. BERMAN,Michel BRUNEAU,Laura N. LOWES,Keh-Chuan TSAI

《结构与土木工程前沿（英文）》 2016年 第10卷 第3期   页码 283-290 doi: 10.1007/s11709-016-0344-z

摘要： As part of a Network for Earthquake Engineering Simulation research project led by researchers at the University of Washington with collaborators at University at Buffalo, and Taiwan National Center for Research on Earthquake Engineering, a self-centering steel plate shear wall (SC-SPSW) system has been developed to achieve enhanced seismic performance objectives, including recentering. The SC-SPSW consists of thin steel infill panels, referred to as web plates that serve as the primary lateral load-resisting and energy dissipating element of the system. Post-tensioned (PT) beam-to-column connections provide system recentering capabilities. A performance-based design procedure has been developed for the SC-SPSW, and a series of nonlinear response history analyses have been conducted to verify intended seismic performance at multiple hazard levels. Quasi-static subassembly tests, quasi-static and shake table tests of scaled three-story specimens, and pseudo-dynamic tests of two full-scale two-story SC-SPSWs have been conducted. As a culmination of this multi-year, multi-institutional project, this paper will present an overview of the SC-SPSW numerical and experimental research programs. This paper will also discuss innovative PT connection and web plate designs that were investigated to improve constructability, resilience, and seismic performance and that can be applied to other self-centering and steel plate shear wall systems.

关键词： self-centering     steel plate shear walls     large-scale experiment     post-tensioned connections     performance-based design    

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Responses to emerging and re-emerging infectious diseases: One world, One health

null

《医学前沿（英文）》 2018年 第12卷 第1期   页码 1-2 doi: 10.1007/s11684-018-0619-y

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碳中和目标下我国再电气化研究

舒印彪 ,谢典 ,赵良 ,高亚静 ,赵勇 ,周朝阳

《中国工程科学》 2022年 第24卷 第3期   页码 195-204 doi: 10.15302/J-SSCAE-2022.03.020

摘要：

我国将碳达峰、碳中和纳入生态文明建设总体布局，电力在引领绿色发展中将发挥更加重要的作用。实施再电气化，实现能源生产侧“清洁替代”和能源消费侧“电能替代”，对我国如期实现碳达峰、碳中和目标具有重要意义。本文剖析了再电气化的核心内涵，结合基本国情及资源禀赋，提出以再电气化助力我国实现低碳发展，按照“终端能源需求—能源转换系统—一次能源结构”的研究框架，综合考虑经济、技术、政策、环境等要素，分析了不同情景下我国能源电力演变趋势，提出再电气化发展前景。研究结果表明，实施再电气化将有力推动实现碳中和目标，2060 年非化石能源消费比重达80%以上、清洁能源发电量比重达90%、终端电能消费比重达70%。研究建议，一是统筹协调好各行业碳预算与减排路径，二是加快经济、产业结构调整，三是推动关键领域科技创新，四是完善电力市场、碳市场体系建设。

关键词： 再电气化；碳中和；能源转型；电能替代    

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Influence of increasing numbers of RE-inverters on the power quality in the distribution grids: A PQ

Przemyslaw JANIK, Grzegorz KOSOBUDZKI, Harald SCHWARZ

《能源前沿（英文）》 2017年 第11卷 第2期   页码 155-167 doi: 10.1007/s11708-017-0469-3

摘要： This paper presents the selected power quality (PQ) indicia of a wind generator and a photovoltaic installation considered to be the representative of medium voltage and low voltage distribution grids. The analysis of measured values suggests that the decrease in PQ is a case of specific combination of distributed generation, grid parameters and load behaviour. Modern generators have a limited impact on PQ. On the other hand, fluctuations in power generation are regarded as an emerging PQ indicator. The growing number of distributed renewable installations causes stochastic, variable, and hardly predictable power flows in the distribution grid. The nature of fluctuations in wind and solar generation is different. In both cases, new indexes for the quantification of fluctuations are needed and are yet not standardised. Proper assessment of these fluctuations enables definition of useful fluctuation limits and rules for optimal storage system integration.

关键词： power quality     harmonics     sags     photovoltaic(PV) system     doubly feed induction generator (DFIG)     inverters    

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Landscape of emerging and re-emerging infectious diseases in China: impact of ecology, climate, and behavior

null

《医学前沿（英文）》 2018年 第12卷 第1期   页码 3-22 doi: 10.1007/s11684-017-0605-9

摘要：

For the past several decades, the infectious disease profile in China has been shifting with rapid developments in social and economic aspects, environment, quality of food, water, housing, and public health infrastructure. Notably, 5 notifiable infectious diseases have been almost eradicated, and the incidence of 18 additional notifiable infectious diseases has been significantly reduced. Unexpectedly, the incidence of over 10 notifiable infectious diseases, including HIV, brucellosis, syphilis, and dengue fever, has been increasing. Nevertheless, frequent infectious disease outbreaks/events have been reported almost every year, and imported infectious diseases have increased since 2015. New pathogens and over 100 new genotypes or serotypes of known pathogens have been identified. Some infectious diseases seem to be exacerbated by various factors, including rapid urbanization, large numbers of migrant workers, changes in climate, ecology, and policies, such as returning farmland to forests. This review summarizes the current experiences and lessons from China in managing emerging and re-emerging infectious diseases, especially the effects of ecology, climate, and behavior, which should have merits in helping other countries to control and prevent infectious diseases.

关键词： infectious disease profile     emerging infectious diseases     influence factor    

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格上基于身份的门限代理重加密方案及应用 Research Articles

吴立强1,韩益亮1,杨晓元1,2,张敏情1

《信息与电子工程前沿（英文）》 2022年 第23卷 第2期   页码 258-277 doi: 10.1631/FITEE.2000366

摘要： 门限代理重加密通过设置多个代理者，不仅能有效防止单个代理者和被授权者合谋，从而违背授权者的意愿随意转化任意文件，而且能在某些代理者瘫痪或者损毁的情况下仍然提供正常服务。本文提出一个格上非交互的基于身份门限代理重加密方案，无需公钥证书。在设计方案过程中，采用了两次Shamir的秘密共享方法，一方面有效隐藏了授权者的私钥信息，另一方面通过分割代理重加密密钥，实现了代理权限的去中心化。鲁棒性是指某个代理者如果提交了非法的密文转化密文份额，那么组合者会立刻识别出这个恶意的代理者。本文方案通过格上全同态签名实现了这一属性。因此，即使未来量子攻击变得可行，我们整个方案也能完全抵抗量子攻击。本文方案的安全性在标准模型下规约为判定性差错学习困难假设。最后，给出本文方案的两个典型应用场景，包括基于区块链的文件共享系统和基于门限密码学的鲁棒密钥托管系统。

关键词： 后量子密码；门限代理重加密；格；鲁棒性；去中心化    

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标题 作者 时间 类型 操作

Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

期刊论文

Experimental study of the restoring force mechanism in the self-centering beam (SCB)

Abhilasha MAURYA,Matthew R. EATHERTON

期刊论文

Parametric study on seismic performance of self-centering reinforced concrete column with bottom-placed

期刊论文

Probabilistic safety assessment of self-centering steel braced frame

Navid RAHGOZAR, Nima RAHGOZAR, Abdolreza S. MOGHADAM

期刊论文

Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

期刊论文

Parametric study of hexagonal castellated beams in post-tensioned self-centering steel connections

Hassan ABEDI SARVESTANI

期刊论文

Validation of a steel dual-core self-centering brace (DC-SCB) for seismic resistance: from brace member

Chung-Che CHOU,Ping-Ting CHUNG,Tsung-Han WU,Alexis Rafael Ovalle BEATO

期刊论文

2014—2016年食品动物源RE-cmeABC阳性弯曲菌流行与耐药性现状

刘德俊, 刘蔚雯, 李星, 姚红, 沈张奇, 汪洋, 沈建忠

期刊论文

Development of small-molecule viral inhibitors targeting various stages of the life cycle of emerging and re-emerging

null

期刊论文

Self-centering steel plate shear walls for improving seismic resilience

Patricia M. CLAYTON,Daniel M. DOWDEN,Chao-Hsien LI,Jeffrey W. BERMAN,Michel BRUNEAU,Laura N. LOWES,Keh-Chuan TSAI

期刊论文

Responses to emerging and re-emerging infectious diseases: One world, One health

null

期刊论文

碳中和目标下我国再电气化研究

舒印彪 ,谢典 ,赵良 ,高亚静 ,赵勇 ,周朝阳

期刊论文

Influence of increasing numbers of RE-inverters on the power quality in the distribution grids: A PQ

Przemyslaw JANIK, Grzegorz KOSOBUDZKI, Harald SCHWARZ

期刊论文

Landscape of emerging and re-emerging infectious diseases in China: impact of ecology, climate, and behavior

null

期刊论文

格上基于身份的门限代理重加密方案及应用

吴立强1,韩益亮1,杨晓元1,2,张敏情1

期刊论文