Results 111 to 120 of about 18,935 (224)
Jianzhu Gangjiegou Jinzhan, 2022 为了填补螺栓球柱节点在高温受压承载性能研究方面的空缺，借助有限元分析软件ABAQUS开展研究。首先，在校核模型可靠性的基础上，进一步提出了更符合实际情况的节点模型；其次，通过147个模型算例探究节点的破坏机理和各关键参数对节点受压承载性能的影响；最后，推导出节点的高温受压承载力公式。研究结果表明：提出的节点模型不仅更符合实际情况，而且对螺栓球柱节点受压性能的评估也更加保守和安全；当温度在300 ℃以内时，节点的初始刚度和承载力变化不明显，当温度大于300 ℃时，节点的初始刚度和承载力出现显著下降 ...
陈安阳 +7 more
doaj
Research on the Torsional Mechanical Properties of Concrete Beams Reinforced with Carbon Fiber Reinforced Polymer and Angle Steel Combination [PDF]
Concrete beams are often subjected to torsion in the actual project, paste carbon fiber reinforced polymer and wrapped angle is commonly used in the actual project of the two concrete beam reinforcement methods, the use of carbon fiber reinforced polymer
Lan, Shuwei +4 more
core +1 more source
Distribution, scale, and drivers of mass mortality events in Europe's freshwater bivalves
Conservation Biology, EarlyView.Abstract Mass mortality events (MMEs) are decimating populations and compromising key ecosystem functions around the globe. One taxon particularly vulnerable to MMEs is freshwater bivalve mollusks. This group has important ecosystem engineering capacities and includes highly threatened and highly invasive taxa.
Daniel A. Cossey +39 more
wiley +1 more source
Comparison of the Characteristics of Domestic Lithium Ores and Lithium Slag and its Application for Building Materialsization: A Review [PDF]
Lithium slag is a new type of large and difficult to treat solid waste that has emerged with the booming development of the lithium battery industry. Due to its complex composition, there are differences in the characteristics of different lithium slag ...
Xinjun SONG +3 more
core +1 more source
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
高延性纤维增强水泥基复合材料(ECC)连续梁模型在地震荷载下的响应及其敏感性分析 [PDF]
, 2019 综述了高延性纤维增强水泥基复合材料(engineered cementitious composite,ECC材料)在拉伸荷载下呈现高延展性等特点,常用于弥补普通混凝土抗拉性能不足的缺点。该文基于现有的ECC本构模型,利用非线性有限元平台OpenSees对已有的算法进行二次开发,利用OpenSees建立ECC连续梁模型,并将模拟结果与试验结果进行了比较分析。该文基于直接微分法(direct differentiation method,DDM),推导实现ECC材料参数的敏感性算法 ...
古泉, 张宁, 郑越
core
Deformation characteristics and fluid-solid coupled analysis of a super-deep circular foundation pit in soft soils [PDF]
The characteristics of super-deep circular foundation pit project in soft soil area are complexity, dangers, and scarcity. It is of great significance to simulate and predict its deformation accurately.
Dean SUN, Shujia LIU, Xin MA
core +1 more source
Conservation Biology, EarlyView.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley +1 more source
A review of platform designs for floating offshore wind turbines [PDF]
The vigorous development of wind power generation technology is the core path for the country to promote the low-carbon energy transformation and realize the "dual-carbon" (carbon peaking and carbon neutrality) goals.
Jianhua ZHANG +3 more
core +1 more source
Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source