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邱江 《中国建筑金属结构》2024,(2):55-57
为了解决建筑钢结构的稳定性低、建筑质量差的问题,本文介绍建筑钢结构施工技术要点及实际应用。深入分析了建筑钢结构施工中遇到的难题,尤其是焊接环节存在的难点,提出了一套有效的焊接技术,并对焊接参数与焊接工艺进行了合理的规范。在施工过程中采用手工焊与二氧化碳保护焊两种方式实现建筑钢结构焊接,在焊接后对实际施工质量进行检测。得出了该施工技术可明显降低焊接处的缺陷,还能够提高焊缝处密实度的结论。 相似文献
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建筑钢结构用钢材及焊接填充材料的选用应符合设计图的要求并应具有钢厂和焊接材料厂出具的质量证明书及检验报告,其化学成分、力学性能和其他质量要求必须符合国家和行业现行标准规定,当采用其他钢材和焊接材料替代设计选用的材料时必须报经原设计单位和监理单位的同意。本文将针对当前建筑钢结构的施工质量问题,并以建筑钢结构焊钉焊接施工为例,探讨其施工工艺与质量控制。 相似文献
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随着高层钢结构建筑的兴建 ,厚板焊接是钢结构构件加工及现场施工安装中的关键技术 ,为帮助企业提高厚板焊接技术和解决焊接工艺中的难题 ,中国钢结构协会组织设计、焊接、监理和钢材方面的专家于 2 0 0 3年 3月 18日在浙江绍兴精工P -D钢结构有限公司召开了“高层钢结构厚板焊 相似文献
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建筑钢结构所用钢材以Q345、Q235为主,但国家游泳中心项目采用钢材为国产高强度钢Q420C,钢材的可焊性及焊接参数等均超出了《建筑钢结构焊接技术规程》JGJ81—2002,Q420C级钢材碳当量高,冷裂敏感性强.常温、负温焊接工艺参数及焊前预热、层间温度控制、焊后保温等现行国家标准尚没有技术参数,需要在工程实践中研究确定。 相似文献
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展望21世纪的我国焊接技术和焊接钢结构产业 总被引:2,自引:0,他引:2
21世纪高速发展的科学技术 ,将决定焊接技术的走向。 2 1世纪前期我国经济和钢材消费量的持续增长将拉动焊接钢结构产业快速发展。论述了 2 1世纪前期焊接材料、焊接结构和焊接自动化的发展前景。预测 15~ 2 0年后 ,由于超级钢的推广应用和激光技术的进展 ,将引起焊接结构和焊接技术重大变革 相似文献
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The first welded steel bridges in Germany – on the rocky beginnings of welding technology. Welding technology – and here primarily arc welding – began to be used about 80 years ago on bridges; first for repairing and strengthening them, and then increasingly, for building new ones. Initially, this new joining technology that had been used since before WWI in mechanical engineering, was met with skepticism on the part of building and code enforcement authorities, and hence, also by many in the building industry. Finally, in the early 1930's, welding technology started its explosive development in steel construction. This euphoric state was dampened a few years later due to several spectacular failures on bridges made of high‐quality construction steel. After comprehensive scientific studies were able to determine the causes of these failures, by the 1960's, welding finally established itself as the most important joining technology in steel bridge construction. 相似文献
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Numerical analysis of welded joints between duplex steel and quartz glass. Welded joints are a vital element in structural engineering. Originating from conventional carbon steel welding in construction, recent advancements in welding technology now allow the joint of modern high‐strength steel and glass materials. With today's methods, an analysis of the welded joints' structural behaviour can be conducted by experiment, as well as by numerical analysis. Particularly for the numeric analysis, capturing the non‐linear thermal and mechanical properties of the materials is important, in order to allow a realistic determination of temperature, microstructure and residual stresses for different types of joints. Simulations of multi‐layered weld joint on duplex steel show, that a targeted heat treatment during MAG‐welding by variation of the welding parameters achieves a beneficial ratio between ferrite and austenite which, for example, ensures a high resistance of the weld to corrosion. The material quartz glass can generally be welded as butt‐weld with a CO2‐laser. The simulations of a welded joint of a plate and a pipe show, that an optimization of the welding technology of preheat laser beam and welding laser beam is necessary, in order to reduce the thermal impact during the welding process, as well as residual stress in the joint. At the Department of Steel Structures at the Bauhaus‐Universität Weimar, numerical simulations of welded joints between steel and glass materials are a current and topical research focus. 相似文献
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大型轻轨铁路钢箱梁构件具有外形尺寸大、结构形式复杂、单体质量大、材质级别高、可焊性差、变形后不易矫正等特点.制作过程中必须严格控制单元件及整体组拼精度,严格按焊接顺序进行施焊,严格控制梁端高强螺栓孔群的钻孔公差.在施工过程中采用了单元小组成、整体组拼、全位置焊接及整体钻孔等技术,并全过程实施质量监控,达到了构件制作的低... 相似文献
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为了使钢焊接工艺更加纯熟,本文探讨了钢焊接接头力学性能非匀质性产生的原因,并对钢焊接接头力学性能的非匀质性的具体表现进行了重点阐述。希望能对建筑结构用钢焊接接头力学性能的非匀质性研究提供帮助,以明确未来建筑的发展方向,促进建筑业发展。 相似文献
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结合工程实例,介绍了现浇混凝土梁端钢筋采用平焊和仰焊与钢管混凝土柱钢牛腿上下加强环钢板焊接,再用内梁预制钢筋笼安装到上、下加强环钢板中间的连接施工技术,并针对施工操作要点及质量验收问题等进行了详细说明。 相似文献