Results 21 to 30 of about 1,018,777 (84)

钢梁-钢筋混凝土柱组合结构研究的进展

open access: yesJianzhu Gangjiegou Jinzhan, 2006
近年来,在组合结构中出现一种新型的结构形式,即由钢筋混凝土柱和钢梁(RCS)组成的框架结构。本文较为系统地阐述国际上RCS组合结构抗震性能的研究情况。主要包括RCS梁柱节点的试验研究、RCS组合框架的试验研究和有限元分析、RCS组合结构的抗震设计及性能分析,以及美日“设计指南”的完善与发展。最后指出RCS结构研究存在的问题和今后的研究趋势。
申红侠
doaj   +1 more source

预制装配式组合梁栓钉连接件抗剪性能试验研究

open access: yesJianzhu Gangjiegou Jinzhan, 2018
钢-混凝土组合梁广泛应用于各类建筑与桥梁等结构,为适应装配式组合结构的发展需求,提出了一种将带预制圆孔的混凝土板与焊接栓钉的钢梁安装定位后在预制孔内后填高强填料以固定栓钉连接件的预制装配式钢-混凝土组合梁。通过静力推出试验,研究栓钉直径、预留孔成孔方式与孔径比(预留孔径和栓钉直径比值)对预制装配式组合梁栓钉抗剪连接件的破坏形态、抗剪承载力和滑移性能的影响规律,并进行了普通现浇组合梁栓钉抗剪连接件的对比试验。试验结果表明:破坏形态均为栓钉剪断和混凝土板开裂 ...
钟琼, 霍静思, 王海涛, 陈俊
doaj   +2 more sources

爆炸荷载作用下钢-混凝土组合梁的动力响应及破坏形态分析

open access: yesJianzhu Gangjiegou Jinzhan, 2008
本文利用LS-DYNA软件对同冲量不同超压峰值不同时间的三种荷载工况下钢-混凝土组合梁的动力响应及破坏模式进行了研究对比,并对梁的变形过程、关键位置点的位移、速度、支座剪力和跨中弯矩进行了详细的分析。结果表明,在爆炸冲击波下,开始阶段混凝土板对钢梁有很好的保护作用,但混凝土易于破碎,钢-混凝土组合梁容易丧失共同工作的能力,剪切破坏是钢-混凝土组合梁的一种重要破坏形式。
杨涛春, 李国强
doaj   +1 more source

Disentangling the Symptom‐Level Nuances in Comorbid Posttraumatic Stress Disorder and Problematic Alcohol Use in Northern Irish Military Veterans: A Network Analysis

open access: yesJournal of Traumatic Stress, Volume 35, Issue 1, Page 32-41, February 2022., 2022
Abstract Posttraumatic stress disorder (PTSD) and alcohol use are highly prevalent among military veteran populations. Several theories have been proposed to account for the comorbidity between PTSD and problematic alcohol use, but research examining the symptom‐level associations between the two is limited.
Emily McGlinchey   +4 more
wiley   +1 more source

Bridging research and practice in conservation

open access: yesConservation Biology, Volume 35, Issue 6, Page 1725-1737, December 2021., 2021
Abstract Calls for biodiversity conservation practice to be more evidence based are growing, and we agree evidence use in conservation practice needs improvement. However, evidence‐based conservation will not be realized without improved access to evidence.
Andrew N. Kadykalo   +7 more
wiley   +1 more source

Disturbed Sleep Connects Symptoms of Posttraumatic Stress Disorder and Somatization: A Network Analysis Approach

open access: yesJournal of Traumatic Stress, Volume 34, Issue 2, Page 375-383, April 2021., 2021
Abstract Posttraumatic stress disorder (PTSD) and physical health problems, particularly somatic symptom disorder, are highly comorbid. Studies have only examined this co‐occurrence at the disorder level rather than assessing the associations between specific symptoms.
Laurence Astill Wright   +6 more
wiley   +1 more source

考虑结构整体性的约束组合梁抗火性能参数分析及实用计算方法

open access: yesJianzhu Gangjiegou Jinzhan, 2008
由于结构的高次超静定,处于结构整体中的约束构件与单个独立构件的抗火性能具有很大不同,这已在Cardinton试验以及一些火灾现象中得到了证实。影响约束组合梁抗火性能的参数很多,采用试验的方法研究这些参数的影响代价很高,本文利用经过试验检验的理论分析方法分析了荷载比、约束刚度、钢梁与混凝土相对面积比等对约束组合梁抗火性能的影响。并根据参数分析结果给出了考虑结构整体性影响的组合梁抗火实用计算方法,最后通过实例说明了实用抗火计算方法的应用。
王银志, 李国强
doaj   +1 more source

钢板-混凝土组合梁桥的活载结构效率指数研究

open access: yes, 2023
为综合考虑钢板-混凝土组合桥梁的工程经济性和整体刚度,并对其量化评估,引入一种新的评价指标——活载结构效率指数(ILLSI)。该指数结合了桥梁结构的用钢量和活载作用下的挠度。对简支方案和连续方案下的ILLSI 计算公式进行了理论推导,并与数值计算结果进行了对比验证。以交通运输部发布的《装配化工字组合梁钢桥通用图》为蓝本,采用ILLSI评价指标分别对双主梁、四主梁、五主梁方案进行评估,提出了ILLSI 指数95%的置信区间。结果表明:对于ILLSI指数95%置信区间,在跨径为20~40 m时 ...
刘旭尧   +3 more
core   +1 more source

International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder – Chinese (Mandarin) translation

open access: yesDevelopmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019
目的 本国际临床指南由欧洲残疾儿童学会(the European Academy of Childhood Disability,EACD)牵头制定,旨在解决发育性协调障碍(developmental coordination disorder,DCD)的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题,通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础,以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类,最终转化为指南建议。并由国际 ...
Jing Hua   +6 more
wiley   +1 more source

A Study of The Clinical Effect and Dropout Rate of Drugs Combined with Group Integrated Psychotherapy on Elderly Patients with Depression

open access: yesGeneral Psychiatry, Volume 30, Issue 1, Page 39-46, July 2018., 2018
Background Relevant studies have shown that group cognitive behavioral therapy is effective in treating patients with depressive disorder, but the dropout rate is high. The present study is aimed to explore the patterns of integrated group psychotherapy.
Bo Liu   +7 more
wiley   +1 more source

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