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    题名 作者 年代 出处 被引量
1人工林碳汇潜力新概念及应用显示文摘定量确定森林碳汇潜力有助于科学地评估森林对碳汇的潜在贡献及制定实现这种潜力所需要的经营管理措施。目前,国内外有关森林碳汇潜力缺乏统一的概念及计量方法。在综述国内外有关固碳潜力概念的基础上,引入时间动态构架和可持续性的概念,提出了针对人工林的固碳潜力概念并利用FORECAST模型以杉木人工林为例阐明此概念的实际意义与应用。魏晓华 郑吉 刘国华 刘世荣 王伟峰 刘苑秋 Blanco A.Juan 2015生态学报2015,35,12:49
2四开关逆变器供电永磁同步电机直接转矩控制系统转矩脉动抑制显示文摘永磁同步电机直接转矩控制(PMSM DTC)系统的转矩脉动问题一直被广泛关注,特别是在四开关逆变器供电系统中,由于可用电压矢量减少,转矩脉动更加严重。空间矢量调制(SVM)是一种常用的消除电力谐波的调制技术,更可用于电机控制中转矩脉动的削减。该文针对四开关逆变器供电PMSM DTC系统的特殊性,采用了一种新型SVM方法,分析了等效零矢量模拟技术,将传统SVPWM调制中的劈零思想引入到空间矢量的合成上。仿真及实验结果验证了该新型SVM DTC方法大大减小了转矩脉动,且仍保持了DTC系统固有的快速转矩动态响应。孙丹 何宗元 Ivonne Yznaga Blanco 贺益康 2007中国电机工程学报2007,27,21:30
3Neuroinflammation and oxidative stress act in concert to promote neurodegeneration in the diabetic retina and optic nerve:galectin-3 participation显示文摘Diabetes is a lifelong disease characterized by glucose metabolic imbalance,in which low insulin levels or impaired insulin signaling lead to hyperglycemic state.Within 20 years of diabetes progression,95%of patients will have diabetic retinopathy,the leading cause of visual defects in working-age people worldwide.Although diabetes is considered a microvascular disease,recent studies have shown that neurodegeneration precedes vascular changes within the diabetic visual system,albeit its mechanisms are still under investigation.Neuroinflammation and oxidative stress are intrinsically related phenomena,since macrophage/microglia and astrocytes are the main sources of reactive oxygen species during central nervous system chronic degenerative diseases,and both pathological processes are increased in the visual system during diabetes.The present review will focus on recent findings of the contribution of oxidative stress derived from neuroinflammation in the early neurodegenerative aspects of the diabetic visual system and their relationship with galectin-3.Henrique Rocha Mendonca Raul Carpi-Santos Karin da Costa Calaza Ana Maria Blanco Martinez 2020Neural Regeneration Research2020,15,4:16
4Tenofovir vs lamivudine plus adefovir in chronic hepatitis B:TENOSIMP-B study显示文摘AIM To demonstrate the non-inferiority(15% non-inferiority limit) of monotherapy with tenofovir disoproxil fumarate(TDF) vs the combination of lamivudine(LAM) plus adefovir dipivoxil(ADV) in the maintenance of virologic response in patients with chronic hepatitis B(CHB) and prior failure with LAM.METHODS This study was a Phase IV prospective, randomized, open, controlled study with 2 parallel groups(TDF and LAM+ADV) of adult patients with hepatitis B e antigen(HBe Ag)-negative CHB, prior failure with LAM, on treatment with LAM+ADV for at least 6 mo, without prior resistance to ADV and with an undetectable viral load at the start of the study, in 14 Spanish hospitals. The follow-up time for each patient was 48 wk after randomization, with quarterly visits in which the viral load, biochemical and serological parameters, adverse effects, adherence to treatment and consumption of hospital resources were analysed.RESULTS Forty-six patients were evaluated [median age: 55.4 years(30.2-75.2); 84.8% male], including 22 patients with TDF and 24 with LAM+ADV. During study development, hepatitis B virus DNA(HBV-DNA) remained undetectable, all patients remained HBe Ag negative, and hepatitis B surface antigen(HBs Ag) positive. Alanine aminotransferase(ALT) values at the end of the study were similar in the 2 groups(25.1± 7.65, TDF vs 24.22 ± 8.38, LAM+ADV, P = 0.646). No significant changes were observed in creatinine or serum phosphorus values in either group. No significant differences between the 2 groups were noted in the identification of adverse effects(AEs)(53.8%, TDF vs 37.5%, LAM+ADV, P = 0.170), and none of the AEs which occurred were serious. Treatment adherence was 95.5% and 83.3% in the TDF and the LAM+ADV groups, respectively(P = 0.488). The costs associated with hospital resource consumption were significantly lower with the TDF treatment than the LAM+ADV treatment(€4943 ± 1059 vs €5811 ± 1538, respectively, P < 0.001).CONCLUSION TDF monotherapy proved to be safe and not inferior to the LAM+ADV combination therapy in maintaining virologic response in patients with CHB and previous LAM failure. In addition, the use of TDF generated a significant savings in hospital costs.Manuel Rodríguez Juan Manuel Pascasio Enrique Fraga Javier Fuentes Martín Prieto Gloria Sánchez-Antolín Jose Luis Calleja Esther Molina María Luisa García-Buey María Angeles Blanco Javier Salmerón María Lucía Bonet Jose Antonio Pons Jose Manuel González Miguel Angel Casado Francisco Jorquera 2017World Journal of Gastroenterology2017,23,41:16
5Injection of bone marrow mesenchymal stem cells by intravenous or intraperitoneal routes is a viable alternative to spinal cord injury treatment in mice显示文摘In spite of advances in surgical care and rehabilitation,the consequences of spinal cord injury(SCI)ar still challenging.Several experimental therapeutic strategies have been studied in the SCI field,and recen advances have led to the development of therapies that may act on the inhibitory microenvironment.As sorted lineages of stem cells are considered a good treatment for SCI.This study investigated the effect o systemic transplantation of mesenchymal stem cells(MSCs)in a compressive SCI model.Here we presen results of the intraperitoneal route,which has not been used previously for MSC administration after comveI.WeafC57BL/6nt lmy atb spinal cord compression for 1 minute with a 30-g vascular clip.The animals were divided into five groups DMEM at 7 days after SCI),DMEM i.v.(intravenous injection of 500μL of DMEM at 7 days after SCI)The effects of MSCs transplantation in white matter sparing were analyzed by luxol fast blue staining.Th number of preserved fibers was counted in semithin sections stained with toluidine blue and the presenc of trophic factors was analyzed by immunohistochemistry.In addition,we analyzed the locomotor perfor mance with Basso Mouse Scale and Global Mobility Test.Our results showed white matter preservation and a larger number of preserved fibers in the MSC groups than in the DMEM groups.Furthermore,th MSC groups had higher levels of trophic factors(brain-derived neurotrophic factor,nerve growth factor neurotrophin-3 and neurotrophin-4)in the spinal cord and improved locomotor performance.Our result indicate that injection of MSCs by either intraperitoneal or intravenous routes results in beneficial out comes and can be elected as a choice for SCI treatment.Bruna dos Santos Ramalho FernANDa Martins de Almeida Conrado Mendonca Sales Silmara de Lima Ana Maria Blanco Martinez 2018Neural Regeneration Research2018,13,6:12
6Global secretome analysis identifies novel mediators of bone metastasis显示文摘骨头是稳固的肿瘤的远转移的一个最普通的地点。分泌蛋白质被知道影响在变形癌症房间和骨头基质之间的病理学的相互作用。为了包括地介绍,分泌了与骨头转移联系的蛋白质,我们使用了量、非量的集体 spectrometry 全球性分析改变从多重种类和癌症的变形能力打的骨头的九根细胞线的 secretomes。由比较父母房间和他们的骨头的 secretomes 变形衍生物,我们识别了特别地在这些房间线与骨头转移被联系的分泌蛋白质。我们然后合并了大临床的转移数据集的生物信息的分析获得强烈与临床、试验性的骨头转移被联系的几个功能的班的候选人小说骨头转移蛋白质的一张表。选择蛋白质的功能的确认显示在 vivo,骨头转移能被高表示支持(1 ) 唾液的 cystatins CST1, CST2,和 CST4;(2 ) plasminogen 使活跃之物小块地和 PLAU;或(3 ) 骨胶原功能蛋白质 PLOD2 和 COL6A1。总的来说,我们的学习揭开了骨头转移并且因此的几个新分泌调停人证明 secretome 分析是为新奇 biomarkers 和候选人的鉴定的一个强大的方法治疗学的目标。Maria Andres Blanco Gary LeRoy Zia Khan Ma a Ale kovi Barry M Zee Benjamin A Garcia Yibin Kang 2012Cell Research2012,22,9:12
7WJSC 6^(th) Anniversary Special Issues(2):Mesenchymal stem cells Neurotrauma and mesenchymal stem cells treatment:From experimental studies to clinical trials显示文摘Mesenchymal stem cell(MSC)therapy has attracted the attention of scientists and clinicians around the world.Basic and pre-clinical experimental studies have highlighted the positive effects of MSC treatment after spinal cord and peripheral nerve injury.These effects are believed to be due to their ability to differentiate into other cell lineages,modulate inflammatory and immunomodulatory responses,reduce cell apoptosis,secrete several neurotrophic factors and respond to tissue injury,among others.There are many pre-clinical studies on MSC treatment for spinal cord injury(SCI)and peripheral nerve injuries.However,the same is not true for clinical trials,particularly those concerned with nerve trauma,indicating the necessity of more well-constructed studies showing the benefits that cell therapy can provide for individuals suffering the consequences of nerve lesions.As for clinical trials for SCI treatment the results obtained so far are not as beneficial as those described in experimental studies.For these reasons basic and pre-clinical studies dealing with MSC therapy should emphasize the standardization of protocols that could be translated to the clinical set with consistent and positive outcomes.This review is based on pre-clinical studies and clinical trials available in the literature from 2010 until now.At the time of writing this article there were 43 and 36 pre-clinical and 19 and 1 clinical trials on injured spinal cord and peripheral nerves,respectively.Ana Maria Blanco Martinez Camila de Oliveira Goulart Bruna dos Santos Ramalho Júlia Teixeira Oliveira Fernanda Martins Almeida 2014World Journal of Stem Cells2014,6,2:11
8Blood pressure gradients in cerebral arteries:a clue to pathogenesis of cerebral small vessel disease显示文摘rationale The role of hypertension in cerebral small vessel disease is poorly understood.At the base of the brain(the‘vascular centrencephalon’),short straight arteries transmit blood pressure directly to small resistance vessels;the cerebral convexity is supplied by long arteries with many branches,resulting in a drop in blood pressure.Hypertensive small vessel disease(lipohyalinosis)causes the classically described lacunar infarctions at the base of the brain;however,periventricular white matter intensities(WMIs)seen on MRI and WMI in subcortical areas over the convexity,which are often also called‘lacunes’,probably have different aetiologies.Objectives We studied pressure gradients from proximal to distal regions of the cerebral vasculature by mathematical modelling.Methods and results Blood flow/pressure equations were solved in an Anatomically Detailed Arterial Network(ADAN)model,considering a normotensive and a hypertensive case.Model parameters were suitably modified to account for structural changes in arterial vessels in the hypertensive scenario.Computations predict a marked drop in blood pressure from large and medium-sized cerebral vessels to cerebral peripheral beds.When blood pressure in the brachial artery is 192/113 mm Hg,the pressure in the small arterioles of the posterior parietal artery bed would be only 117/68 mm Hg.In the normotensive case,with blood pressure in the brachial artery of 117/75 mm Hg,the pressure in small parietal arterioles would be only 59/38 mm Hg.conclusion These findings have important implications for understanding small vessel disease.The marked pressure gradient across cerebral arteries should be taken into account when evaluating the pathogenesis of small WMIs on MRI.Hypertensive small vessel disease,affecting the arterioles at the base of the brain should be distinguished from small vessel disease in subcortical regions of the convexity and venous disease in the periventricular white matter.Pablo J Blanco Lucas O Müller J David Spence 2017Stroke & Vascular Neurology2017,2,3:9
90.23T开放性磁共振实时引导下经皮激光热消融术治疗肝脏恶性肿瘤显示文摘目的 评价肝脏肿瘤在磁共振介入激光治疗中的热消融变化及光学器械追踪系统对激光纤维的精确定位和实时监测激光治疗中热消融变化的能力 ,观察激光消融治疗肝脏恶性肿瘤的可行性与安全性。方法 对经病理学活检证实的 14例恶性肝脏肿瘤患者 (4例为肝细胞癌 ,10例为肝转移瘤 ,共 2 2个肿瘤 )进行 0 .2 3T开放性磁共振成像系统与介入引导下经皮激光热消融治疗术。结果 全部病灶均被成功定位、靶定并消融治疗。肿瘤形态、术后瞬间及 3天后热消融形成的凝固坏死灶均在磁共振图像上显示。除 1例有部分残余外 ,所有热消融灶均大于各自原始肿瘤大小 ;术后 3天热消融凝固灶大于术后瞬间凝固灶。结论 磁共振引导经皮肝脏肿瘤激光热消融术是可行和安全的 ;光学追踪系统引导与磁共振温度监测对准确估计热治疗效果是有用且可信赖的工具。李成利 武乐斌 陈立光 史浩 林征宇 Robert Blanco Sequneir 2004中国介入影像与治疗学2004,1,1:8
10Impairment of ghrelin synthesis in Helicobacter pyloricolonized stomach:New clues for the pathogenesis of H.pylori-related gastric inflammation显示文摘Ghrelin,the ligand of growth hormone secretagogue receptor 1a,takes part in several functions of the digestive system,including regulation of appetite,energy homeostasis,gastric acid secretion and motility.Ghrelin has also immunoregulatory properties and is supposed to inhibit some inflammatory pathways that can mediate gastric damage.Interestingly,ghrelin synthesis is reduced in the gastric mucosa of patients with Helicobacter pylori(H.pylori)infection,a worldwide condition inducing a T helper(Th)1/Th17 cell responsedriven gastritis,which may evolve towards gastric atrophy and cancer.In this article,we review the available data on the expression of ghrelin in H.pylori infection and discuss how the defective ghrelin synthesis may contribute to sustain the ongoing inflammatory response in this disease.Omero Alessandro Paoluzi Giovanna Del Vecchio Blanco Roberta Caruso Ivan Monteleone Giovanni Monteleone Francesco Pallone 2014World Journal of Gastroenterology2014,20,3:8
11Treatment of peri-anal fistula in Crohn's disease显示文摘Anal fistulas are a common manifestation of Crohn's disease(CD). The first manifestation of the disease is often in the peri-anal region, which can occur years before a diagnosis, particularly in CD affecting the colon and rectum. The treatment of peri-anal fistulas is difficult and always multidisciplinary. The European guidelines recommend combined surgical and medical treatment with biologic drugs to achieve best results. Several different surgical techniques are currently em-ployed. However, at the moment, none of these tech-niques appear superior to the others in terms of healing rate. Surgery is always indicated to treat symptomatic, simple, low intersphincteric fistulas refractory to medi-cal therapy and those causing disabling symptoms. Ut-most attention should be paid to correcting the balance between eradication of the fistula and the preservationof fecal continence.Giuseppe S Sica Sara Di Carlo Giorgia Tema Fabrizio Montagnese Giovanna Del Vecchio Blanco Valeria Fiaschetti Giulia Maggi Livia Biancone 2014World Journal of Gastroenterology2014,20,37:8
12Umbilical cord as a mesenchymal stem cell source for treating joint pathologies显示文摘Articular cartilage disorders and injuries often result in life-long chronic pain and compromised quality of life.Regrettably,the regeneration of articular cartilage is a continuing challenge for biomedical research.One of the most promising therapeutic approaches is cellbased tissue engineering,which provides a healthy population of cells to the injured site but requires differentiated chondrocytes from an uninjured site.The use of healthy chondrocytes has been found to have limitations.A promising alternative cell population is mesenchymal stem cells(MSCs),known to possess excellent proliferation potential and proven capability for differentiation into chondrocytes.The“immunosuppressive”property of human MSCs makes them an important candidate for allogeneic cell therapy.The use of allogeneic MSCs to repair large defects may prove to be an alternative to current autologous and allogeneic tissue-grafting procedures.An allogeneic cell-based approach would enable MSCs to be isolated from any donor,expanded and cryopreserved in allogeneic MSC banks,providing a readily available source of progenitors for cell replacement therapy.These possibilities have spawned the current exponential growth in stem cell research in pharmaceutical and biotechnology communities.Our objective in this review is to summarize the knowledge about MSCs from umbilical cord stroma and focus mainly on their applications for joint pathologies.María Carmen Arufe Alexandre De la Fuente Isaac Fuentes Francisco Javier De Toro Francisco Javier Blanco 2011World Journal of Orthopedics2011,2,6:7
13Malignant gastric outlet obstruction:Which is the best therapeutic option?显示文摘Malignant gastric outlet obstruction(MGOO)is a clinical condition characterized by the mechanical obstruction of the pylorus or the duodenum due to tumor compression/infiltration,with consequent reduction or impossibility of an adequate oral intake.MGOO is mainly secondary to advanced pancreatic or gastric cancers,and significantly impacts on patients’survival and quality of life.Patients suffering from this condition often present with intractable vomiting and severe malnutrition,which further compromise therapeutic chances.Currently,palliative strategies are based primarily on surgical gastrojejunostomy and endoscopic enteral stenting with self-expanding metal stents.Several studies have shown that surgical approach has the advantage of a more durable relief of symptoms and the need of fewer re-interventions,at the cost of higher procedure-related risks and longer hospital stay.On the other hand,enteral stenting provides rapid clinical improvement,but have the limit of higher stent dysfunction rate due to tumor ingrowth and a subsequent need of frequent reinterventions.Recently,a third way has come from interventional endoscopic ultrasound,through the development of endoscopic ultrasound-guided gastroenterostomy technique with lumen-apposing metal stent.This new technique may ideally encompass the minimal invasiveness of an endoscopic procedure and the long-lasting effect of the surgical gastrojejunostomy,and brought encouraging results so far,even if prospective comparative trial are still lacking.In this Review,we described technical aspects and clinical outcomes of the above-cited therapeutic approaches,and discussed the open questions about the current management of MGOO.Edoardo Troncone Alessandro Fugazza Annalisa Cappello Giovanna Del Vecchio Blanco Giovanni Monteleone Alessandro Repici Anthony Yuen Bun Teoh Andrea Anderloni 2020World Journal of Gastroenterology2020,26,16:7
14多器官床旁即时超声在新型冠状病毒肺炎中的应用:国际专家共识显示文摘新型冠状病毒肺炎(简称新冠肺炎,COVID-19)自首次报道以来,已造成全球超一亿人感染,给各国的公共卫生体系造成了巨大威胁。新冠肺炎的临床表现以呼吸系统体征和症状为主,80%的患者症状轻微,约5%为危重症患者,常表现为急性呼吸窘迫综合征(ARDS)。前期,由于缺乏相关研究,面对日益紧迫的临床困境,医务人员不得不借鉴采取一些经验性措施以应对疫情。王臻(译) Arif Hussain Gabriele Via Lawrence Melniker Alberto Goffi Guido Tavazzi Luca Neri Tomas Villen Richard Hoppmann Francesco Mojoli Vicki Noble Laurent Zieleskiewicz Pablo Blanco Irene W.Y.Ma Mahathar Abd.Wahab Abdulmohsen Alsaawi Majid AI Salamah Martin Balik Diego Barca Karim Bendjelid Belaid Bouhemad Pablo Bravo-Figueroa Raoul Breitkreutz Juan Calderon Jim Connolly Roberto Copetti Francesco Corradi Anthony J.Dean AndréDenault Deepak Govil Carmela Graci Young-Rock Ha Laura Hurtado Toru Kameda Michael Lanspa Christian B Laursen Francis Lee Rachel Liu Massimiliano Meineri Miguel Montorfano Peiman Nazerian Bret P.Nelson Aleksandar N.Neskovic Ramon Nogue Adi Osman JoséPazeli Elmo Pereira-Junior Tomislav Petrovic Emanuele Pivetta Jan Poelaert Susanna Price Gregor Prosen Shalim Rodriguez Philippe Rola Colin Royse Yale Tung Chen Mike Wells Adrian Wong Wang Xiaoting Wang Zhen Yaseen Arabi 2021中国呼吸与危重监护杂志2021,20,2:5
15Meiotic abnormalities in metaphase I human spermatocytes from infertile males: frequencies, chromosomes involved, and relationship with polymorphic karyotype and seminal parameters显示文摘这研究的目的是深入地看在 meiotic 异例和男不孕之间的关系,例如包含的染色体或与耐心的特征的关联的决心。为这个目的,从为生育力问题做咨询的个人的 31 件阴囊的组织样品的一个总数被分析。中期我房间用联合 Leishman 的顺序的方法论被评估在 situ 杂交协议的染色的过程和复合荧光。单位和 chiasmata 数每的 chromosomal 的数字二原子价被建立,个人的层次簇分析被执行。在再结合上的 seminogram 和 karyotype 的关系用泊松回归模型被评估。在这研究获得的结果与改变的 meiotic 行为显示出不肥沃的个人的一个重要百分比,主要在中等、大的染色体, univalents 的存在,和 tetraploid 中期的观察在 chiasmata 计数作为减小指定了。而且,数字和异例的类型被发现在一样的个人的房间之间不同,与正常 meiotic 行为和房间建议房间线的共存与畸形排队。另外,在中期的 chromosomal 畸形我显著地与 oligozoospermia 或多态的 karyotype 变体被联系。Zaida Sarrate Francesca Vidal Joan Blanco 2014Asian Journal of Andrology2014,16,6:5
16资产管理和寿命周期显示文摘诠释了资产管理和寿命周期的概念 ,评估这些概念在设备维修管理范围内的重要性 ,强调他们对财务的影响。介绍实现正确的资产管理的三种方法 :集约维修最优化 (IMO)、以可靠性为中心的维修 (RCM2 )、全员生产维修 (TPM)。Santiago Sotuyo Blanco 梁工谦 邱若娟 2005设备管理与维修2005,,3:5
17Low efficacy of levofloxacin-doxycycline-based third-line triple therapy for Helicobacter pylori eradication in Italy显示文摘AIM:To evaluate a levofloxacin-doxycycline-based triple therapy with or without a susceptibility culture test in non-responders to Helicobacter pylori(H.pylori) eradication.METHODS:A total of 142(99 women,43 men; mean 53.0 ± 12.7 years) non-responders to more than two H.pylori eradication therapies underwent susceptibility culture tests or were treated with a seven-day triple therapy consisting of esomeprazole,20 mg b.i.d.,levofloxacin,500 mg b.i.d.,and doxycycline,100 mg b.i.d.,randomly associated with(n = 71) or without(n = 71) Lactobacillus casei DG.H.pylori status was checked in all patients at enrollment and at least 8 wk after the end of therapy.Compliance and tolerability of regimens were also assessed.RESULTS:H.pylori eradication was achieved in < 50% of patients [per prototol(PP) = 49%; intention to treat(ITT) = 46%].Eradication rate was higher in patients administered probiotics than in those without(PP = 55% vs 43%; ITT = 54% vs 40%).Estimated primary resistance to levofloxacin was 18% and multiple resistance was 31%.Therapy was well tolerated,and side effects were generally mild,with only one patient experiencing severe effects.CONCLUSION:Third-line levofloxacin-doxycycline triple therapy had a low H.pylori eradication efficacy,though the success and tolerability of this treatment may be enhanced with probiotics.Omero Alessandro Paoluzi Giovanna Del Vecchio Blanco Emanuela Visconti Manuela Coppola Carla Fontana Marco Favaro Francesco Pallone 2015World Journal of Gastroenterology2015,21,21:5
18介入MRI监测下肿瘤激光消融显示文摘Roberto Blanco Sequeiros 李成利 李康安 2002医学影像学杂志2002,12,2:5
19Determination of drug,excipients and coating distribution in pharmaceutical tablets using NIR-CI显示文摘The growing interest of the pharmaceutical industry in Near Infrared-Chemical Imaging (NIR-CI) is a result of its high usefulness for quality control analyses of drugs throughout their production process (particularly of its non-destructive nature and expeditious data acquisition).In this work,the concentration and distribution of the major and minor components of pharmaceutical tablets are determined and the spatial distribution from the internal and external sides has been obtained.In addition,the same NIR-CI allowed the coating thickness and its surface distribution to be quantified.Images were processed to extract the target data and calibration models constructed using the Partial Least Squares (PLS) algorithms.The concentrations of Active Pharmaceutical Ingredient (API) and excipients obtained for uncoated cores were essentially identical to the nominal values of the pharmaceutical formulation.But the predictive ability of the calibration models applied to the coated tablets decreased as the coating thickness increased.Anna Palou Jordi Cruz Marcelo Blanco Jaume Tomàs Joaquín de los Ríos Manel Alcalà 2012Journal of Pharmaceutical Analysis2012,2,2:4
20砂土中桥梁高桩承台基础的抗震延性能力参数分析显示文摘尽管现行的各国抗震规范对桩基础优先按照能力保护构件进行设计,但以往震害和相关分析表明,桩基础进入非线性对于桥梁的抗震性能并非一定不利。基于此出发点,本文采用Pushover方法对2×3高桩承台基础的延性能力进行了参数分析,探究其延性抗震的潜力。数值模型通过某高桩承台基础的拟静力试验进行了验证。参数分析考虑了桩基础、上部结构和土体三方面参数变化的影响,包括桩径、配筋率、配箍率、恒载轴压比、承台底附加弯矩、自由段长度和土体相对密实度。提出了基于不同性能状态的高桩承台基础延性能力指标:'易修位移延性系数'和'极限位移延性系数',揭示了指标随各参数的变化规律;结果表明,易修、极限位移延性系数基本符合对数正态分布,中位值分别为2.66、3.82,延性能力可观;另外,建立了位移延性系数和截面曲率延性系数的定量关系。王晓伟 Guillermo Blanco 叶爱君 赫中营 2018土木工程学报2018,51,5:4
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