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波形钢板墙与框架柱搭接焊连接力学性能数值模拟

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浙江建筑 2024年第3期41卷 50-52页

作者：王立娟费建伟董文秀浙江中南绿建科技集团有限公司浙江杭州310052 杭州恒达钢构股份有限公司浙江杭州311200

波形钢板墙与框架柱连接方式,类似于平钢板剪力墙与框架柱的连接方式,即采用搭接焊连接。对于能否采用单侧搭接焊连接满足剪力墙抗剪连接强度要求,通过整体壳单元模型进行抗剪数值模拟,并利用双侧角焊缝与单侧角焊缝进行对比分析。结果... 详细信息

波形钢板墙与框架柱连接方式,类似于平钢板剪力墙与框架柱的连接方式,即采用搭接焊连接。对于能否采用单侧搭接焊连接满足剪力墙抗剪连接强度要求,通过整体壳单元模型进行抗剪数值模拟,并利用双侧角焊缝与单侧角焊缝进行对比分析。结果表明,单侧角焊缝具有较好的传力性能,能满足钢板剪力墙连接抗剪性能不低于墙体本身抗剪性能的规范要求。

关键词：搭接焊连接单侧角焊缝抗剪数值模拟整体壳单元模型

Novel phenanthrene/bibenzyl trimers from the tubers of Bletilla striata attenuate neuroinﬂammation via inhibition of NF-κB signaling pathway

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Chinese Journal of Natural Medicines 2024年第5期22卷 441-454页

作者： SHAO Siyuan SUN Mohan MA Xianjie JIANG jianwei TIAN Jinying ZHANG Jianjun YE fei LI Shuai State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

Five novel(9,10-dihydro)phenanthrene and bibenzyl trimers,as well as two previously identified biphenanthrenes and bibenzyls,were isolated from the tubers of Bletilla *** structures were elucidated through comprehensive analyses of NMR and HRESIMS spectroscopic *** absolute configurations of these compounds were determined by calculating rotational energy barriers and comparison of experimental and calculated ECD *** 5b and 6 exhibited inhibitory effects on LPS-induced NO production in BV-2 cells,with IC_(50) values of 12.59±0.40 and 15.59±0.83μmol·L^(-1),respectively.A mechanistic study suggested that these compounds may attenuate neuroinflammation by reducing the activation of the AKT/IκB/NF-κB signaling ***,compounds 3a,6,and 7 demonstrated significant PTP1B inhibitory activities,with IC_(50) values of 1.52±0.34,1.39±0.11,and 1.78±0.01μmol·L^(-1),*** investigation revealed that compound 3a might inhibit LPS-induced PTP1B overexpression and NF-κB activation,thereby mitigating the neuroinflammatory response in BV-2 cells.

关键词： Bletilla striata Phenanthrene/bibenzyl trimer NO inhibition AKT/IκB/NF-κB signaling pathway PTP1B inhibitory effect

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基于ANSYS约束屈曲支撑框架结构分析

四川建筑科学研究 2011年第2期37卷 73-75页

作者：费建伟华南理工大学广东广州510640

传统的耗能支撑框架结构具有较好的经济性,但是,在中震和强震时,支撑会发生受压屈曲。利用ANSYS模拟约束屈曲支撑框架在地震作用下的结构响应,采用理想弹塑性模型模拟屈曲约束支撑的滞回性能,分别在中震烈度和大震烈度下,对一般框架结... 详细信息

传统的耗能支撑框架结构具有较好的经济性,但是,在中震和强震时,支撑会发生受压屈曲。利用ANSYS模拟约束屈曲支撑框架在地震作用下的结构响应,采用理想弹塑性模型模拟屈曲约束支撑的滞回性能,分别在中震烈度和大震烈度下,对一般框架结构和约束屈曲支撑框架结构进行非线性时程分析,得到结构响应。分析结果表明,约束屈曲支撑结构减震效果良好。

关键词：约束屈曲支撑时程分析减震率

Photodoping-Modified Charge Density Wave Phase Transition in WS_(2)/1T-TaS_(2) Heterostructure

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Chinese Physics Letters 2024年第5期41卷 144-170页

作者：王瑞丁建伟孙飞赵继民裘晓辉 Beijing Information Technology College Beijing 100015China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Max Planck Institute for Chemical Physics of Solids Dresden 01187Germany Songshan Lake Materials Laboratory Dongguan 523808China

Controlling collective electronic states hold great promise for development of innovative devices. Here, we experimentally detect the modification of the charge density wave(CDW) phase transition within a 1T-TaS_(2) layer in a WS_(2)/1T-TaS_(2) heterostructure using time-resolved ultrafast spectroscopy. Laser-induced charge transfer doping strongly suppresses the commensurate CDW phase, which results in a significant decrease in both the phase transition temperature(T_(c)) and phase transition stiffness. We interpret the phenomenon that photoinduced hole doping, when surpassing a critical threshold value of ~ 10^(18)cm^(-3), sharply decreases the phase transition energy barrier. Our results provide new insights into controlling the CDW phase transition, paving the way for optical-controlled novel devices based on CDW materials.

关键词： doping transition Transition

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等肢L形钢管混凝土异形柱强度承载力解析法

建筑结构 2023年第S1期53卷 1889-1893页

作者：费建伟杨红亮浙江中南绿建科技集团有限公司杭州310052 杭州市开发投资有限公司杭州310000

对钢管混凝土异形柱的强度承载力计算方法,提出了一种计算等肢L形钢管混凝土异形柱强度承载力的解析法。利用单轴对称的横截面,内力之间线性相互作用的条件(将截面内力根据内力方向与主轴的关系,进行坐标变换,得到主轴方向的内力值),基... 详细信息

对钢管混凝土异形柱的强度承载力计算方法,提出了一种计算等肢L形钢管混凝土异形柱强度承载力的解析法。利用单轴对称的横截面,内力之间线性相互作用的条件(将截面内力根据内力方向与主轴的关系,进行坐标变换,得到主轴方向的内力值),基于现有规范双轴对称截面的压弯构件强度承载力计算方法,在这两者基础上对计算方法进行修正,推导单轴对称等肢L形钢管混凝土异形柱截面的双向压弯强度承载力公式。分别对截面不同受压区情况,基于图形分解法和中和轴平移相结合方法,推导了可直接计算全截面塑性弯矩的计算公式。通过有限元分析对算例进行了复核,计算结果表明该方法与有限元分析相比较为保守,相关计算方法可供设计院对钢管混凝土异形柱的强度承载力验算的参考。

关键词： L形钢管混凝土异形柱强度承载力解析法全截面塑性弯矩有限元

Metal–organic frameworks and their derivatives for optimizing lithium metal anodes

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eScience 2024年第4期4卷 7-26页

作者： Zhaoyang Wang Zijuan Du Yiyang Liu Caroline EKnapp Yuhang Dai jianwei Li Wei Zhang Ruwei Chen fei Guo Wei Zong Xuan Gao Jiexin Zhu Chuanliang Wei Guanjie He Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology College of Chemistry EngineeringLiaocheng UniversityLiaocheng 252059China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK School of Chemistry and Chemical Engineering Shandong UniversityJinan 250061China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of Sciences(CAS)Xining 810008China

Lithium metal anodes(LMAs)have been considered the ultimate anode materials for next-generation ***,the uncontrollable lithium dendrite growth and huge volume expansion that can occur during charge and discharge seriously hinder the practical application of ***–organic framework(MOF)materials,which possess the merits of huge specific surface area,excellent porosity,and flexible composition/structure tunability,have demonstrated great potential for resolving both of these *** article first explores the mechanism of lithium dendrite formation as described by four influential ***,based on an in-depth understanding of these models,we propose potential strategies for utilizing MOFs and their derivatives to suppress lithium dendrite *** then provide a comprehensive review of research progress with respect to various applications of MOFs and their derivatives to suppress lithium dendrites and inhibit volume *** paper closes with a discussion of perspectives on future modifications of MOFs and their derivatives to achieve stable and dendrite-free lithium metal batteries.

关键词： Metal–organic frameworks Lithium metal batteries Lithium metal anodes Lithium dendrite formation mechanism Lithium dendrite inhibition strategy

Rapid identification of full-length genome and tracing variations of monkeypox virus in clinical specimens based on mNGS and amplicon sequencing

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Virologica Sinica 2024年第1期39卷 134-143页

作者： Changcheng Wu Ruhan A Sheng Ye fei Ye Weibang Huo Roujian Lu Yue Tang jianwei Yang Xuehong Meng Yun Tang Shuang Chen Li Zhao Baoying Huang Zhongxian Zhang Yuda Chen Dongfang Li Wenling Wang Ke-jia Shan Jian Lu Wenjie Tan NHC Key Laboratory of Biosafety National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing100052China Chongqing Municipal Key Laboratory for High Pathogenic Microbes Chongqing Center for Disease Control and PreventionChongqing400042China MGI BGI-ShenzhenShenzhen518083China Thermo Fisher Scientific Beijing100013China School of Public Health Baotou Medical CollegeBaotou014030China BGI PathoGenesis Pharmaceutical Technology Shenzhen518000China State Key Laboratory of Protein and Plant Gene Research Center for BioinformaticsSchool of Life SciencesPeking UniversityBeijing100871China College of Life Sciences University of Chinese Academy of SciencesBeijing100049China

The monkeypox virus(MPXV)has triggered a current outbreak *** sequencing of MPXV and rapid tracing of genetic variants will benefit disease diagnosis and *** is a significant challenge but necessary to optimize the strategy and application of rapid full-length genome identification and to track variations of MPXV in clinical specimens with low viral loads,as it is one of the DNA viruses with the largest genome and the most AT-biased,and has a significant number of tandem *** we evaluated the performance of metagenomic and amplicon sequencing techniques,and three sequencing platforms in MPXV genome sequencing based on multiple clinical specimens of five mpox cases in Chinese *** rapidly identified the full-length genome of MPXV with the assembly of accurate tandem repeats in multiple clinical *** sequencing enables cost-effective and rapid sequencing of clinical specimens to obtain high-quality MPXV ***-generation sequencing facilitates the assembly of the terminal tandem repeat regions in the monkeypox virus genome and corrects a common misassembly in published ***,several intra-host single nucleotide variations were identified in the first imported mpox *** study offers an evaluation of various strategies aimed at identifying the complete genome of MPXV in clinical *** findings of this study will significantly enhance the surveillance of MPXV.

关键词： Monkeypox virus(MPXV) Metagenomic Next generation sequencing Amplicon Third-generation sequencing

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钢框架梁柱厚板节点的计算与应用

建筑结构 2023年第S2期53卷 1194-1198页

作者：孟繁飞费建伟黄勇浙江中南绿建科技集团有限公司杭州310052

在钢结构住宅建筑中,通常钢管混凝土柱采用扁柱或者异形柱,柱宽一般小于200mm,为了满足混凝土灌浆孔的最小尺寸和避免凸梁凸柱,无法选择通常的内隔板式节点、隔板贯通式节点或者外环加劲板节点。我司研发了一种适用于钢结构住宅的梁柱... 详细信息

在钢结构住宅建筑中,通常钢管混凝土柱采用扁柱或者异形柱,柱宽一般小于200mm,为了满足混凝土灌浆孔的最小尺寸和避免凸梁凸柱,无法选择通常的内隔板式节点、隔板贯通式节点或者外环加劲板节点。我司研发了一种适用于钢结构住宅的梁柱厚板节点,根据规范和自行理论推导的参数进行了节点计算,并完成了节点计算的计算机实现。同时,在宁波某住宅工程中采用了梁柱厚板节点,在制作和施工过程中都实现了很好地应用。

关键词：钢框架梁柱厚板节点节点计算计算机实现

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框架单波形钢板剪力墙结构设计与分析

建筑结构 2022年第S2期52卷 257-261页

作者：孟繁飞费建伟张可浙江中南建设集团钢结构有限公司杭州310052

框架单波形钢板剪力墙结构体系具有平面外刚度好、抗剪承载力高、耗能能力强等优势,同时,相较于框架支撑结构和框架双波形钢板剪力墙结构体系,其具有节省用钢量、施工更为简便、与围护系统更容易相配合等优势。为了对该结构体系有更深... 详细信息

框架单波形钢板剪力墙结构体系具有平面外刚度好、抗剪承载力高、耗能能力强等优势,同时,相较于框架支撑结构和框架双波形钢板剪力墙结构体系,其具有节省用钢量、施工更为简便、与围护系统更容易相配合等优势。为了对该结构体系有更深入地理解,以便更好地指导工程设计,针对一个具体项目——江二村1#高层办公楼,进行了计算和分析,同时对该工程分别采用框架支撑结构体系、框架双钢板剪力墙结构体系进行了计算,对比这三种不同的结构体系,在计算结果指标都满足规范要求的前提下,框架单波形钢板剪力墙体系相较于纯框架体系和框架双钢板组合剪力墙体系,用钢量有较大节省,同时,用不同的软件进行计算,对比发现采用支撑等代的方法可以比较准确地模拟单钢板的受力情况。

关键词：单波形钢板剪力墙结构设计高层钢结构支撑等代