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Jianzhu Gangjiegou Jinzhan为了研究7075-T6高强铝合金方管的轴心受压承载力，制作了9个试件进行轴心受压试验，得到了试件的极限承载力、破坏模式和荷载-轴向位移曲线。进行了试件的有限元数值分析，并将数值分析结果与试验结果对比，验证了有限元数值分析的准确性。采用有限元数值分析进行参数分析，获得了适用于7075-T6高强铝合金方管构件的整体稳定系数-相对长细比曲线，讨论了当相对长细比变化时局部屈曲对承载力的影响。结果表明，7075-T6高强铝合金方管具有一定的延性；建立的有限元模型可以精确模拟试件加载的全过程以及极限承载力 ...
刘均利 +5 more
doaj +3 more sources
Jianzhu Gangjiegou Jinzhan为研究冷弯薄壁不等肢复杂卷边角钢屈曲性能和稳定承载力设计方法，对24根不同截面、长细比、宽厚比的不等肢复杂卷边角钢进行了轴压试验。试验结果表明，长细比较大且宽厚比较小的试件易发生弯扭屈曲，长细比较小而宽厚比较大的试件易发生局部屈曲或弯扭和局部相关屈曲。采用ABAQUS有限元软件对试件进行了有限元模拟，屈曲模式和承载力与试验结果吻合良好，表明建立的有限元分析模型是可行的。因此可采用经验证的有限元模型对不同长细比、卷边形式和卷边比的轴心受压不等肢复杂卷边角钢进行了参数化分析。结果表明 ...
姚行友 +3 more
doaj +2 more sources
Jianzhu Gangjiegou Jinzhan冷弯薄壁型钢（CFS）全螺栓垫板连接T形拼合柱是一种新型拼合截面柱，在全螺栓连接框架结构中承受集中荷载。目前关于全螺栓连接T形CFS拼合柱轴心受力性能的研究报道较少。基于已有的试验研究成果，建立准确可靠的T形CFS拼合柱数值分析模型，选取构件长细比、板材厚度、垫板的纵向间距等参数，研究在轴压作用下各重要参数对T形CFS拼合柱极限承载力和屈曲模态的影响。结果表明：随着长细比的增大，T形CFS拼合柱的屈曲模式由局部与畸变相关屈曲逐渐转变为整体屈曲，当长细比<104.7时 ...
陈明 +4 more
doaj +5 more sources
Comparative Analysis of Slenderness Ratio Calculation Methods of Cross Bracings for Towers Between China and EU Overhead Transmission Line Standards [PDF]
, 2023 [Introduction] This paper aims to effectively avoid the design quality problems caused by the difference between domestic and foreign engineering design specifications. The study makes comparative analysis of slenderness ratio of cross bracings for angle
Hongliang GUO +3 more
core +1 more source
Research on Bearing Capacity of Angle Steel Transmission Tower Subject to Parallel Reinforcement by Fitting Channel Steel [PDF]
, 2023 [Introduction] The existing angle steel transmission tower has been running for many years, and the structural damage leads to the reduction of service performance.
Donghong ZHANG +4 more
core +1 more source
Jianzhu Gangjiegou Jinzhan为研究FRP管-橡胶混凝土-钢管组合柱（RC-DSTCs）的轴压性能，进行了7根长柱试件的轴压试验。观察RC-DSTCs在轴压状态下的破坏模式，通过荷载-位移曲线、荷载-应变曲线和环向-轴向应变曲线分析长细比、空心率对RC-DSTCs轴压性能的影响，并提出了RC-DSTCs的轴压理论承载力计算公式。结果表明：随着长细比的提高，RC-DSTCs的轴压破坏模式由材料破坏向弯曲失稳破坏转化，但所有RC-DSTCs的钢管均达到屈服应变0.2%；同时，随着长细比的提高，RC-DSTCs的峰值荷载 ...
何明理 +7 more
doaj +1 more source
Risk, Hazards &Crisis in Public Policy, Volume 14, Issue 4, Page 366-388, December 2023., 2023 Abstract Why do some countries provide better access to life‐saving public goods than others? An enduring explanation from the political economy literature points to ethnic heterogeneity in impeding public goods provision. However, previous studies have not examined how the “diversity deficit” directly affects access to improved water and sanitation, a
Amira Jadoon, Hina Khalid, Ashley Fox
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 62, Issue 6, Page 778-787, December 2023., 2023 ABSTRACT Objectives Congenital knee dislocation (CKD) is a rare condition, affecting 1 in 100 000 newborns. Its prenatal diagnosis is challenging and not well described in the literature, especially when it appears isolated and not as part of a complex malformation or syndromic pattern. The purpose of this study was to provide a comprehensive review of
P. I. Cavoretto +7 more
wiley +1 more source
SARS‐CoV‐2 infection as cause of in‐utero fetal death: regional multicenter cohort study
Ultrasound in Obstetrics &Gynecology, Volume 62, Issue 6, Page 867-874, December 2023., 2023 ABSTRACT Objective Placental infection with severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) can lead to placental insufficiency and in‐utero fetal death (IUFD). The objective of this study was to confirm and quantify the extent to which fetoplacental infection with SARS‐CoV‐2 is a cause of fetal death.
M. Nkobetchou +9 more
wiley +1 more source
Journal of Diabetes, Volume 15, Issue 10, Page 890-899, October 2023., 2023 Highlights Patients with type 2 diabetes (T2D) are prone to developing chronic diabetes‐related complications at the microvascular and macrovascular levels. The Computerized Nailfold Video‐Capillaroscopy (CNVC) provides specific information on both quantitative and qualitative characteristics of microvasculature at the level of fingers.
Giuseppe Lisco, Vincenzo Triggiani
wiley +1 more source