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预埋型螺栓连接件的可拆换性能研究
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作者 门进杰 杜天宇 +3 位作者 李家富 张谦 王家琛 mudassar ali 《地震工程与工程振动》 北大核心 2025年第2期86-96,共11页
文中提出了一种预埋型螺栓连接件,通过设置预埋钢块和螺栓锥套,减少受载时混凝土和钢梁的损伤,实现组合梁的可拆换。设计制作了8组试件,推出试验后拆卸,并对拆卸后的组件重新使用并加载,分析其可拆换性能。探讨了螺栓直径、螺栓强度、有... 文中提出了一种预埋型螺栓连接件,通过设置预埋钢块和螺栓锥套,减少受载时混凝土和钢梁的损伤,实现组合梁的可拆换。设计制作了8组试件,推出试验后拆卸,并对拆卸后的组件重新使用并加载,分析其可拆换性能。探讨了螺栓直径、螺栓强度、有无T形钢块和预埋钢块外径等因素的影响规律。研究结果表明:试件破坏时螺栓剪断或混凝土压溃;8组试件加载后均可快速拆卸;拆卸后的钢梁和T形钢块可多次重复使用;加载后处于无损伤和轻微损伤状态的混凝土板可重复使用2次以上且试件的抗剪性能基本不变;处于损伤状态的混凝土板可重复使用1次,但试件的抗剪性能降低;处于严重损伤状态的混凝土板不可重复使用。此外,预埋型螺栓连接件具有良好的抗掀起性能;螺栓直径或强度的增加,试件的承载力和混凝土板的损伤增加;预埋钢块外径增加,试件的承载力不变,但混凝土板的损伤减少;有无T形钢块对试件的承载力基本没有影响,但可以提高可拆换性能。最后提出了混凝土板局部损伤系数η作为可拆换性能控制指标,当η在0.5左右时可拆换状态较好。 展开更多
关键词 组合梁 预埋型螺栓连接件 推出试验 可拆换性能 可拆换性能指标
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Three Tier Fog Networks: Enabling IoT/5G for Latency Sensitive Applications 被引量:6
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作者 Romana Shahzadi Ambreen Niaz +4 位作者 mudassar ali Muhammad Naeem Joel J.P.C.Rodrigues Farhan Qamar Syed Muhammad Anwar 《China Communications》 SCIE CSCD 2019年第3期1-11,共11页
Following the progression in Internet of Things(IoT) and 5G communication networks, the traditional cloud computing model have shifted to fog computing. Fog computing provides mobile computing, network control and sto... Following the progression in Internet of Things(IoT) and 5G communication networks, the traditional cloud computing model have shifted to fog computing. Fog computing provides mobile computing, network control and storage to the network edges to assist latency critical and computation-intensive applications. Moreover, security features are improved in fog paradigm by processing critical data on edge devices instead of data centres outside the control plane of users. However, fog network deployment imposes many challenges including resource allocation, privacy of users, non-availability of programming model and testing software and support for the heterogenous networks. This article highlights these challenges and their potential solutions in detail. This article also discusses threetier fog network architecture, its standardization and benefits in detail. The proposed resource allocation mechanism for three tier fog networks based on swap matching is described. Results show that by practicing the proposed resource allocation mechanism, maximum throughput with reduced latency is achieved. 展开更多
关键词 CLOUD computing FOG NETWORKS MATCHING GAMES internet of THINGS
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