共查询到19条相似文献,搜索用时 78 毫秒
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水泥熟料生产线窑尾钢结构框架是水泥厂建设项目中标志性建筑物,施工周期长、作业高度高、交叉作业多、施工危险性大,容易发生安全事故。本文以某6000t/d新型干法生产线窑尾钢结构框架为例,探讨了窑尾钢结构框架安装防护的安全措施。通过实际施工过程中的检验,安全生产绩效显著。 相似文献
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在高层建筑的基础设计时,应综合考虑建筑场地的地质状况、上部结构的类型、施工条件、使用要求,确保建筑物不致发生过量沉降或倾斜,满足建筑物正常使用要求。还应注意与相邻建筑的相互影响,了解邻近地下构筑物及各项地下设施的位置和标高,确保施工安全。在地震区,高层建筑宜避开对抗震不利的地段;当条件不允许避开不利地段时,应采取可靠措施,使建筑物在地震时不致由于地基失稳而破坏,或者产生过量下沉或倾斜。 相似文献
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伊拉克SCP日产5000t熟料生产线窑尾框架及预热器由浙江中材水泥设计院设计,其中窑尾框架主体结构底部两层为砼框架结构,上部六层为钢管砼柱加钢管支撑结构。重点介绍了该窑尾框架结构的施工质量控制以及钢管砼立柱中砼的浇灌质量要求。 相似文献
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本文依据增量理论,采用钢结构高等分析方法中的等效假想荷载塑性铰法对钢框架结构进行二阶弹塑性极限承载力分析,通过对计算结果的分析比较表明精确分析框架结构在荷载作用下的性能时,应当考虑节点刚度的非线性和截面局部屈服对结构极限承载力的影响。 相似文献
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钢结构端板连接在国外工程设计中比较常见,且在国内也逐渐开始采用。但国内规范并没有针对性的设计指导和规定。本文对中国成达工程公司所承担的外包项目的高层钢结构框架实例,采用端板连接结点形式,基于欧洲规范和国内规范的要求,进行了在横向作用下的动力时程和静力分析,并提出一些设计建议。 相似文献
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将分析设计直接法引入5000t/d生产线的增湿塔设计中,运用有限元分析方法对增湿塔结构进行校核和评定。结合实例,详细阐述了应用有限元软件ANSYS分析增湿塔在不同工况的应力和变形的方法,并对设备最大应力点及其它危险部位进行应力评定。有限元分析法可对同类结构进行分析校核和优化设计。 相似文献
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对方钢管混凝土柱-钢梁竖向加劲肋式节点建立了同时考虑几何非线性和材料非线性的有限元分析模型,模拟分析了单调加载下节点的受力性能,较为精确地分析了节点区应力分布.结果表明:由有限元模型所得的位移曲线与试验所得的低周反复荷载作用下的骨架曲线相符,由有限元模型所得的应变分布和发展规律与试验结果一致;竖向加劲肋式节点的梁端弯矩一部分通过竖向加劲肋传递给柱钢管腹板和核心混凝土,另一部分梁端弯矩由梁端翼缘直接传递给柱钢管翼缘和核心混凝土;节点的破坏模式为梁翼缘变截面最窄处形成塑性铰,最终梁受压翼缘出现严重的局部屈曲,而柱钢管和竖向加劲肋均在弹性范围内工作,很好地实现了强柱弱梁、强节点弱构件的抗震原则;节点核心区混凝土性能符合斜压杆受力机制. 相似文献
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Salih Akpinar Murat Demir Aydin Adnan Özel 《Journal of Adhesion Science and Technology》2013,27(23):2591-2602
In this work, elasto-plastic stress analysis of single lap joints with and without protrusion in adhesive bondline subjected to tension and bending was carried out using 2D non-linear finite element analysis and confirmed experimentally. AA 2024-T3 aluminum adherends were bonded with SBT 9244 film adhesive. The protrusion was obtained by extending the adhesive film by 2?mm from the overlap length at both overlap ends. Three different adherend thicknesses and overlap lengths for each loading and bondline type were used. The joints with and without protrusion, for comparison, were loaded with the same load for each adherend thickness and overlap length. Finally, it was observed that the protrusion reduces the strength in the joint under tension, while the protrusion increases the strength in the joint under bending. 相似文献
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Romeu R. C. Da Costa Ricardo De Medeiros Marcelo L. Ribeiro 《The Journal of Adhesion》2017,93(1-2):77-94
ABSTRACTCurrently, there is a growing concern for the environment. Several studies of new materials to reduce environmental impact have been carried out by different research groups, and many companies have replaced parts made of fossil sources by renewable materials. The use of polyurethane (PU) derived from castor oil as a matrix for composite materials and adhesives is one example. Hence, the present work aims to compare the numerical and experimental analyses of castor oil PU and epoxy resin not only as a matrix of composite materials, but also as an adhesive of bonded joints. The joint coupons were manufactured by using castor oil PU-glass fibre and epoxy-glass fibre as adherents, which were bonded by epoxy or castor oil PU. Thus, four combinations of adherents and adhesives were investigated. Specimens with identical geometry were used in all tests, which were based on guidelines for single lap bonded joints. Computational simulations via Finite Element Method were performed for predictions of the adhesive layer stresses and strength. In addition, a material model is proposed to predict the failure of the adhesive layer. The experimental and numerical results showed that PU derived from castor oil has good mechanical performance, making this material a feasible alternative for bonded joints, mostly nowadays when environment is a major concern. 相似文献