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大尺寸CFRP约束混凝土方柱的轴心抗压试验研究

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湖南大学学报（自然科学版） 2016年第3期43卷 75-82页

作者：单波蔡静肖岩 giorgio monti 湖南大学土木工程学院湖南长沙410082 罗马第一大学意大利罗马00917

试件的尺寸对于碳纤维增强塑料(CFRP)约束混凝土柱的性能具有重要影响,但目前在CFRP约束混凝土尺寸效应方面的研究基本上还处于空白.基于对7种不同倒角半径的大尺寸CFRP约束混凝土方柱的轴心抗压试验,获取了各组试件的破坏模式、抗压强... 详细信息

试件的尺寸对于碳纤维增强塑料(CFRP)约束混凝土柱的性能具有重要影响,但目前在CFRP约束混凝土尺寸效应方面的研究基本上还处于空白.基于对7种不同倒角半径的大尺寸CFRP约束混凝土方柱的轴心抗压试验,获取了各组试件的破坏模式、抗压强度、应力-应变曲线、外包CFRP应变分布等基本力学性能,并与已有小尺寸试件的试验结果进行比较和分析.研究结果表明,试件的抗压强度随倒角半径比的增大而增大,外包CFRP对直角试件几乎无增强作用;所有试件的破坏都是由外包CFRP的拉断所导致,断裂位置均位于倒角范围内,应力集中的现象明显;约束效应比MCR可以较好地反映尺寸效应对抗压强度影响,试件尺寸的增大显著降低CFRP的约束效应;外包CFRP的极限应变低于其材性试验结果35%以上,明显大于对应的小试件试验结果;已有模型的计算结果与本试验的实测结果存在显著差异,故有必要考虑尺寸效应的影响.

关键词： FRP 约束混凝土方柱轴心受压尺寸效应

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标准化立式工业建筑楼面活荷载取值

建筑结构学报 2023年第3期44卷 268-278页

作者：李智丁然聂鑫李宾宾黄宝锋 monti giorgio 肖岩浙江大学建筑工程学院浙江杭州310058 清华大学土木工程系北京100084 浙江大学浙大-伊利诺伊大学厄巴纳香槟校区联合学院浙江海宁314400 上海师范大学建筑工程学院上海201814

楼面活荷载的合理取值是立式多层工业建筑推广过程中需要解决的重要基础理论问题之一。在简要总结我国结构工程设计所遵循的以概率理论为基础、以分项系数表达的极限状态设计方法的基础上,分析立式工业建筑的荷载环境,并对立式工业建筑... 详细信息

楼面活荷载的合理取值是立式多层工业建筑推广过程中需要解决的重要基础理论问题之一。在简要总结我国结构工程设计所遵循的以概率理论为基础、以分项系数表达的极限状态设计方法的基础上,分析立式工业建筑的荷载环境,并对立式工业建筑楼面活荷载的取值方法进行研究。梳理国内外现行荷载规范相关取值方法,调研我国部分具有代表性的多层工业厂房在设计时的荷载取值,并针对实际运用中所发现的具体问题提出了改进建议。通过与国外相关规范进行对比研究,建议进一步简化我国工业建筑楼面活荷载特征值的分类和分区,对于标准化工业园区的重工业厂房,楼面活荷载标准值建议取值约为12 kN/m^(2),轻工业厂房为4~6 kN/m^(2)。对于造纸、化工及钢铁冶炼等大型工业厂房,则按其工艺流程进行荷载取值。针对新型立式工业建筑所涉及的物流与冲击荷载亟待深入研究,对利用基于网络平台的建筑信息学模型(BIM)需深入开展荷载信息收集与管理。

关键词：工业建筑立式多层活荷载物流与冲击荷载

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弹性地基上梁式基础的一种修正分析法

公路工程 2017年第4期42卷 140-144,190页

作者：李刚白晓鹤 giorgio monti 湖南大学土木工程学院湖南长沙410082

采用变分原理,对弹性模量随深度呈指数变化的修正Vlasov双参数地基上的梁式基础进行分析。基于最小势能原理,建立梁式基础的变形控制微分方程,并得到与地基弹性模量相关的可用简化迭代确定的形状参数。结合边界条件,导出梁式基础及地基... 详细信息

采用变分原理,对弹性模量随深度呈指数变化的修正Vlasov双参数地基上的梁式基础进行分析。基于最小势能原理,建立梁式基础的变形控制微分方程,并得到与地基弹性模量相关的可用简化迭代确定的形状参数。结合边界条件,导出梁式基础及地基的位移解。通过算例分析,探讨了形状参数对竖向位移衰减函数及地基梁式基础内力和变形的影响,以及各参数间的相互关系,并与有限元所得数值法结果进行对比。分析结果表明,考虑地基土弹性模量呈非线性变化,较符合工程实际,在同等条件下具有更好的经济效益。

关键词：梁式基础修正Vlasov地基模型变分原理非线性模量

Bending Stiffness of Truss-Reinforced Steel-Concrete Composite Beams

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Open Journal of Civil Engineering 2014年第3期4卷 285-300页

作者： Francesco Trentadue Erika Mastromarino Giuseppe Quaranta Floriana Petrone giorgio monti Giuseppe Carlo Marano Department of Civil Engineering and Architecture Technical University of Bari Bari Italy Metal.Ri s.r.l - via Giuseppe Abbruzzese 42 - 70020 Bitetto (BA) Department of Structural and Geotechnical Engineering Sapienza University of Rome Rome Italy Department of Civil and Environmental Engineering University of California Davis CA USA

This paper is concerned with a special steel-concrete composite beam in which the resisting system is a truss structure whose bottom chord is made of a steel plate supporting the precast floor system. This system works in two distinct phases with two different resisting mechanisms: during the construction phase, the truss structure bears the precast floor system and the resisting system is that of a simply supported steel truss;once the concrete has hardened, the truss structure becomes the reinforcing element of a steel-concrete composite beam, where it is also in a pre-stressed condition due to the loads carried before the hardening of concrete. Within this framework, the effects of the diagonal bars on the bending stiffness of this composite beam are investigated. First, a closed-form solution for the evaluation of the equivalent bending stiffness is derived. Subsequently, the influence of geometrical and mechanical characteristics of shear reinforcement is studied. Finally, results obtained from parametric and numerical analyses are discussed.

关键词： Bending Stiffness Steel-Concrete Composite Beams Precast Floor Systems

模拟嵌入式FRP条增强钢筋混凝土梁抗剪的三维力学模型

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钢结构(中英文) 2009年第6期 84-85页

作者： Vincenzo Bianco J.A.O.Barros giorgio monti

嵌入式FRP增强钢筋混凝土梁抗剪是进行结构修复的新技术,由于嵌入式FRP所具有的一些优势,使其成为较好的外贴加固技术,越来越受到重视。嵌入式FRP主要优势在于材料开发、对结构完整性的保护以及相对较快的适用性。由于FRP条复杂的几何尺... 详细信息

嵌入式FRP增强钢筋混凝土梁抗剪是进行结构修复的新技术,由于嵌入式FRP所具有的一些优势,使其成为较好的外贴加固技术,越来越受到重视。嵌入式FRP主要优势在于材料开发、对结构完整性的保护以及相对较快的适用性。由于FRP条复杂的几何尺寸,粘结后的非线性力学性能,混凝土受拉性能的离散性,使得嵌入式FRP条加固的性能十分复杂,一般通过试验来获得其性能。为更好地掌握表面嵌贴FRP带的性能,提出三维力学模型,用于模拟在相似加载过程中,嵌入式FRP条体系对钢筋混凝土梁抗剪强度的贡献。模型很好地解释了试验结果,并在模型中考虑了粘结滑移力和混凝土破坏之间的相互作用以及相邻FRP条之间的相互作用等复杂现象。

关键词：数值模型纤维增强复合材料嵌入式技术增强抗剪混凝土破坏剥离

COVID-19 pandemic in the intensive care unit:Psychological implications and interventions,a systematic review

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World Journal of Psychiatry 2023年第4期13卷 191-217页

作者： Laura monti Elisa Marconi Maria Grazia Bocci Georgios Demetrios Kotzalidis Marianna Mazza Carolina Galliani Sara Tranquilli Giovanni Vento giorgio Conti Gabriele Sani Massimo Antonelli Daniela Pia Rosaria Chieffo UOS Psicologia Clinica Governo ClinicoFondazione Policlinico Universitario Agostino Gemelli IRCCSRome 00168Italy UOC Anestesia RianimazioneTerapia Intensiva e Tossicologia ClinicaDipartimento di Scienze Dell’EmergenzaAnestesiologiche e Della RianimazioneFondazione Policlinico Universitario Agostino Gemelli IRCCSRome 00168Italy UOC Psichiatria Clinica e d’Urgenza Dipartimento di Scienze Dell’InvecchiamentoNeurologicheOrtopediche e Della Testa-colloFondazione Policlinico Universitario Agostino Gemelli IRCCSRome 00168Italy NESMOS Department Facoltàdi Medicina e PsicologiaSant’Andrea University HospitalRome 00189Italy Department of Psychiatry UniversitàCattolica del Sacro CuoreRome 00168Italy Department of Psychology UniversitàCattolica del Sacro CuoreRome 00168Italy UOC Neonatologia Dipartimento di Scienze Della Salute Della DonnaDel Bambino e di SanitàPubblicaFondazione Policlinico Universitario Agostino Gemelli IRCCSRome 00168Italy UOC Neonatologia UniversitàCattolica del Sacro CuoreRome 00168Italy UOC Terapia Intensiva Pediatrica e Trauma Center Pediatrico Dipartimento di Scienze Dell’EmergenzaAnestesiologiche e Della RianimazioneFondazione Policlinico Universitario Agostino Gemelli IRCCSRome 00168Italy UOC Terapia Intensiva Pediatrica e Trauma Center Pediatrico UniversitàCattolica del Sacro CuoreRome 00168Italy Department of Anesthesiology and Intensive Care Medicine UniversitàCattolica del Sacro CuoreRome 00168Italy

BACKGROUND The coronavirus disease 2019(COVID-19) pandemic produced changes in intensive care units(ICUs) in patient care and health organizations. The pandemic event increased patients’ risk of developing psychological symptoms during and after hospitalisation. These consequences also affected those family members who could not access the hospital. In addition, the initial lack of knowledge about the virus and its management, the climate of fear and uncertainty, the increased workload and the risk of becoming infected and being contagious, had a strong impact on healthcare staff and organizations. This highlighted the importance of interventions aimed at providing psychological support to ICUs, involving patients, their relatives, and the staff;this might involve the reorganisation of the daily routine and rearrangement of ICU staff *** To conduct a systematic review of psychological issues in ICUs during the COVID-19 pandemic involving patients, their relatives, and ICU *** We investigated the PubMed and the *** databases and found 65 eligible articles,upon which we *** Our results point to increased perceived stress and psychological distress in staff, patients and their relatives and increased worry for being infected with severe acute respiratory syndrome coronavirus-2 in patients and relatives. Furthermore, promising results were obtained for some psychological programmes aiming at improving psychological measures in all ICU *** As the pandemic limited direct inter-individual interactions, the role of interventions using digital tools and virtual reality is becoming increasingly important. All considered, our results indicate an essential role for psychologists in ICUs.

关键词： COVID-19 Intensive care unit Psychological interventions Pandemic Mental health Health care professionals

Hepatitis C virus-related B cell subtypes in non Hodgkin's lymphoma

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World Journal of Hepatology 2011年第11期3卷 278-284页

作者： Adriano M Pellicelli Massimo Marignani Valerio Zoli Mario Romano Aldo Morrone Lorenzo Nosotti Giuseppe Barbaro Antonio Picardi Umberto Vespasiani Gentilucci Daniele Remotti Cecilia D'Ambrosio Caterina Furlan Fabrizio Mecenate Ettore Mazzoni Ignazio Majolino Roberto Villani Arnaldo Andreoli giorgio Barbarini Liver Unit Azienda Ospedaliera San Camillo Forlanini Circonvallazione Gianicolense 8700149 Rome Italy Department of Digestive and Liver Disease Azienda Ospedaliera Sant’AndreaVia Grottarossa 1035/1039000189 Rome Italy Hematology and Bone Marrow Transplantation Azienda Ospedaliera San Camillo ForlaniniCirconvallazione Gianicolense 8700149 Rome Italy Liver Unit Ospedale Sandro PertiniVia dei Monti Tiburtini 38500157 Rome Italy Azienda Ospedaliera San Camillo Forlanini Circonvallazione Gianicolense87 00149 Rome Italy Medicine of Migration National Institute for Migrant Health and Poverty Via di S. Gallicano 25/a 00153Rome Italy Department of Medical Pathophysiology University of Rome "La Sapienza" Viale del Policlinico 15500161 Rome Italy Liver Unit Campus Biomedico UniversityVia álvaro del Portillo 21 00128Rome Italy Histopathology Unit Azienda Ospedaliera San Camillo ForlaniniCirconvallazione Gianicolense 8700149Rome Italy Liver Unit Azienda Ospedaliera San Camillo ForlaniniCirconvallazione Gianicolense 8700149 Rome Italy Department of Infectious and Tropical Disease University of Rome"La Sapienza"Viale del Policlinico155 00161 Rome Italy Liver Unit Ospedale Villa BetaniaVia Niccolò Piccolomini 2700165 RomeItaly Liver Unit Policlinico CasilinoVia Casilina104900169 Rome Italy Hematology and Bone Marrow Transplantation Azienda Ospedaliera San Camillo ForlaniniCirconvallazione Gianicolense 8700149 RomeItaly Liver Unit Azienda Ospedaliera San Camillo ForlaniniCirconvallazione Gianicolense 8700149 RomeItaly Infectious and Parasitic Diseases Policlinico San Matteo P.zzale Golgi 2 2710 PaviaItaly

AIM:To evaluate if indolent B cell-non Hodgkin's lymphoma(B-NHL) and diffuse large B-cell lymphoma(DLBCL) in hepatitis C virus(HCV) positive patients could have different biological and clinical characteristics requiring different management ***:A group of 24 HCV related B-NHL patients(11 indolent,13 DLBCL) in whom the biological and clinical characteristics were described and *** with DLBCL were managed with the standard of care of *** with indolent HCV-related B-NHL were managed with antiviral treatment pegylated interferon plus ribavirin and their course *** outcomes of the different approaches were ***:Patients with DLBCL had a shorter duration of HCV infection and a higher prevalence of HCV genotype 1 compared to patients with indolent B-NHL in which HCV genotype 2 was the more frequent *** of the 9 patients with indolent HCV-relatedB-NHL treated with only antiviral therapy,achieved a complete response of their onco-haematological disease(55%).Seven of the 13 DLBCL patients treated with immunochemotheraphy obtained a complete response(54%).CONCLUSION:HCV genotypes and duration of HCV infection differed between B-NHL *** lymphomas can be managed with antiviral treatment,while DLBCL is not affected by the HCV infection.

关键词： Hepatitis C virus infection Diffuse large B cell lymphoma Indolent lymphoma Pegylated interferon Lymphomagenesis