Results 21 to 30 of about 651,027 (126)
, 2001 吸力式沉箱是一种重要的新型海洋结构物基础 ,其水平承载能力可采用极限平衡法近似地估算。本文提出了分析成层土地基中沉箱水平承载力的简单方法 ...
吴梦喜, 王梅, 楼志刚
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Jianzhu Gangjiegou Jinzhan, 2021 钢结构中存在着残余应力,严重影响构件或节点刚度及极限承载力。利用有限元实体模型,通过预定义场功能引入煨弯钢管工艺中产生的热弯残余应力分布。考虑拱脚支承形式、荷载形式、长细比3个因素,研究了热弯残余应力对圆钢管拱结构平面内极限承载力的影响。通过分析得出:不同支承形式和荷载形式下热弯残余应力对钢拱平面内极限承载力的影响在3%以内,当均布荷载作用时热弯残余应力会使钢拱提前进入弹塑性阶段;当正则化长细比在1.30～1.70之间时,热弯残余应力对钢拱平面内极限承载力的影响最为明显,可降低9%。
芦燕, 宋浩然, 韩庆华
doaj
Designing Integrated Policies for the Twin Transition: Challenges and Tradeoffs
Policy Studies Journal, EarlyView.ABSTRACT Democratic governance faces the intertwined imperatives of managing the transformative risks and opportunities of digitalization, particularly stemming from artificial intelligence (AI), while achieving environmental sustainability within planetary boundaries.
Martino Maggetti
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Biomass‐based hydrogels are widely regarded as ideal substrates for self‐powered wearable sensors. However, the practical applications of hydrogels are commonly limited by their inherent low strength and toughness, which restrict their capacity to withstand repeated stretching, bending and other mechanical loads arising from human motion in ...
Boyu Du +9 more
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Jianzhu Gangjiegou Jinzhan, 2022 现行设计规范针对矩形钢管混凝土柱承载力提供了3种不同的计算方法，在实践中发现各种计算方法之间存在一定程度的偏差。分别使用3本规范提供的承载力计算方法并结合试验数据，对不同高宽比截面和套箍系数的矩形钢管混凝土柱的轴压强度承载力、轴压稳定承载力、强弱轴抗弯承载力以及强弱轴单向压弯承载力进行对比分析。对比结果表明：当截面高宽比大于2.0时，《钢管混凝土结构技术规范》（GB 50936—2014）得到的弱轴面内压弯承载力与试验值偏差较大；《矩形钢管混凝土结构技术规程》（CECS 159：2004 ...
付波 +4 more
doaj
Human–Wildlife Conflict Is Not a Myth
Integrative Conservation, Volume 5, Issue 3, Page 250-254, September 2026.ABSTRACT Despite well‐established critiques of the term, human–wildlife conflict remains a valid way to refer to certain types of harmful interactions between people and wild animals. Efforts to diversify human–wildlife interaction terminology beyond the conflict paradigm were partly catalyzed by an influential article in Conservation Letters titled ...
Justin Raycraft
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Jianzhu Gangjiegou Jinzhan, 2022 提出了一类新型预制拼装组合结构盖梁。为研究其受力机理，建立了非线性有限元模型，讨论了预制拼装组合结构盖梁破坏过程，分析了钢材强度、本构模型、腹板和顶板厚度对承载力的影响，通过理论计算对数值模拟进行了验证。研究结果表明：新型预制拼装组合盖梁先后出现混凝土开裂、腹板、顶板及加劲肋屈服、强化后达到极限承载力，表现为剪切破坏状态；试件加载中荷载-挠度曲线表现出明显的线性、塑性和加强阶段，结构屈服后有较好的延性，承载力保持逐步增长；试件腹板和混凝土承担70%~75%的极限承载力 ...
周强, 李永君, 刘思维, 刘玉擎
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT TiN films deposited by physical vapor deposition (PVD) are widely used as protective films due to their high hardness and wear resistance. However, their application under high‐load conditions is limited by poor load‐bearing capacity and susceptibility to spalling on soft substrates.
Ziyu Wang +6 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 在各国现行规范中，强度叠加法广泛应用于型钢混凝土柱的受剪承载力计算，即型钢混凝土柱的受剪承载力单纯等同于型钢腹板受剪承载力与钢筋混凝土部分受剪承载力之和，不考虑二者间的相互作用。但因型钢与钢筋混凝土部分材料属性与截面面积差异巨大，导致两部分的受剪承载力无法同时达到峰值，致使传统强度叠合法偏于不安全。为解决上述问题，在传统桁架-拱模型和现行规范计算方法中引入了变形协调条件，以此确定了型钢与钢筋混凝土部分在受剪全过程中的承载力分配准则，并基于41个型钢混凝土柱的试验结果验证了所提方法的有效性。计算结果表明 ...
薛亦聪 +4 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Many metallic components are frequently subjected to coupled environments of friction and vibration, stemming from interfacial contact and relative motion between mating parts or external stimuli. Consequently, it is imperative for these components to exhibit a synergy of high wear resistance and superior damping properties.
Ze Pu +12 more
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