Results 21 to 30 of about 1,557,725 (133)
Jianzhu Gangjiegou Jinzhan, 2023 部分包裹混凝土异形组合柱可避免室内凸柱问题的出现，但由于型钢翼缘外露和截面形状系数大，其抗火性能较差。为考察常用的十字形部分包裹混凝土组合（PEC）柱的耐火性能，采用ABAQUS有限元分析软件建立了轴压下十字形PEC柱的温度场及热力学分析模型。在已有相关试验数据验证模型可靠性的基础上，分析了十字形PEC柱的升温过程、受力机理和破坏模式，并与矩形PEC柱进行对比。之后详细研究了荷载比、长细比、截面尺寸和受火方式等对轴压下十字形PEC柱耐火性能的影响规律。结果表明：相比于矩形PEC柱 ...
王静峰, 孙彤, 刘用
doaj
Jianzhu Gangjiegou Jinzhan, 2021 根据钢结构防火保护材料的相关技术要求,通过对常见的钢结构围护材料进行评价,筛选了包括水泥基材料中的无机轻集料砂浆、胶粉聚苯颗粒、蒸压轻质加气混凝土(autoclaved lightweight concrete,ALC),保温浆料中的石膏基保温浆料、微孔硅酸钙浆料,以及保温板材中的发泡陶瓷保温板和岩棉板在内的3类可以兼作防火保护的材料,分别对以上材料进行耐火性能测试,通过试验现象及试验数据分析评价不同材料的耐火性能,并给出对应的建议构造措施。结果表明,当对这些材料采用合适的构造方式 ...
蒋首超, 吴弘宸
doaj
Jianzhu Gangjiegou Jinzhan, 2021 钢材高温蠕变是钢材在高温和应力作用下的塑性应变。高温蠕变会导致钢柱变形增大,耐火极限降低。为了考察高温蠕变对冷弯薄壁型钢柱抗火性能的影响程度,建立了考虑高温蠕变的抗火分析有限元模型,通过试验结果对有限元模型进行验证。利用模型研究了在不同荷载比、轴向约束刚度比、升温速率和火灾场景下,高温蠕变对冷弯薄壁型钢柱抗火性能的影响。研究表明,在有限元模型中考虑蠕变因素后,对于钢柱抗火性能的预测更为准确,更符合真实情况;在中等升温速率的火灾场景中,荷载比为0 ...
杨竞杰, 王卫永
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Pyritum can eliminate blood stasis and promote the healing of muscles and bones, which has been used as a traditional mineral medicine in China for thousands of years. However, the mechanisms of action and processing methods of Pyritum were not illustrated.
Mingxia Li +8 more
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Jianzhu Gangjiegou Jinzhan, 2022 预应力波纹腹板开孔组合梁力学性能不同于普通平腹板开孔组合梁。为研究腹板开孔对预应力波纹钢-混凝土组合梁抗火性能的影响，采用有限元软件ABAQUS对该类组合梁在高温作用下的力学性能进行非线性有限元分析，重点考察了预应力波纹腹板开孔组合梁的内力、跨中挠度以及破坏模式，并对其耐火性能进行了参数研究。结果表明：孔洞所在截面波纹腹板剪应力呈非均匀分布，临界状态时，该截面腹板基本丧失抗剪能力。预应力波纹腹板组合梁纯弯区开孔时，其破坏模式与无孔组合梁一致，均为弯曲破坏，孔洞基本不影响其跨中挠度与耐火性能 ...
周焕廷, 陈祥, 伍先兴
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
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To address the demand for high‐temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS2) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure ...
Zhi Song +4 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Interface polarization enhancement and impedance matching optimization are the keys to improving the comprehensive performance of microwave absorbing materials (MAMs). Herein, a green synthesis strategy integrating sacrificial template self‐etching, hydrothermal reaction, and annealing treatment is proposed to successfully fabricate urchin ...
Zhenzhen Tian +8 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Zirconium dioxide (ZrO2) thin films are critical materials owing to their thermal stability, mechanical durability, and optical transparency enabling applications in photonic, sensing, and electronic devices. However, achieving uniform deposition via plasma‐enhanced chemical vapor deposition (PE‐CVD) has remained challenging due to poor ...
Nour Manafikhi +4 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT In this study, an in‐depth investigation was carried out to elucidate the energy and structural modifications in connection with the property of corrosion resistance. The strategy is to employ the fictive temperature (Tf) as the indicator of the energy state of amorphous alloys.
Liang Yang +10 more
wiley +1 more source