共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
3.
《混凝土与水泥制品》2016,(7)
Y型巨柱斜撑高位转换结构是一种较为复杂的钢管混凝土结构体系,基于此类结构内部带有多层加劲肋板的封闭钢管混凝土结构具有操作空间狭小,浇筑工艺困难、内部空气难以排除、混凝土成型质量不易控制的特点。本文结合西宁某工程实践,提出了一种Y型巨柱斜撑高位转换体系中高位封闭斜撑钢管自密实混凝土的泵送顶升施工技术。 相似文献
4.
5.
6.
施工顺序会影响复杂结构构件的内力,斜撑与桁架组合转换结构中斜撑水平推力在楼盖中的传递途径是复杂结构设计的关键。研究了光明新区公共服务平台斜撑与桁架组合转换结构在竖向荷载作用下传递斜撑水平推力时转换层楼盖的受力特征;通过对两种施工过程的计算,分析比较了转换层楼板的施工顺序对结构传力途径的影响以及对结构主要受力构件内力的影响。分析结果表明,不同施工方案对楼盖中的梁与板的内力分配有一定的影响,尤其在斜撑水平推力较大时楼盖的内力变化更为明显,若处理不当会存在较大的安全隐患。 相似文献
7.
8.
鄂尔多斯国泰商务广场由6栋高层和3座大底盘裙房组成,其中两栋为地上57层的超限钢-混凝土混合结构,结构高度接近240m。工程采用了底部带斜撑转换的型钢混凝土外框筒-钢筋混凝土核心筒的结构体系,未设置结构加强层。介绍了工程的特点和结构体系的选择,针对结构的超限情况提出相关的抗震措施。采用SATWE和ETABS有限元分析与设计软件进行了小震和中震的弹性计算,采用ABAQUS软件进行了大震动力弹塑性时程分析进行验证。重点介绍了斜撑转换结构的设计思路和计算方法,此外,设计还对转换斜撑节点进行了细致的有限元分析。分析结果显示,工程各项计算指标比较理想,整体设计满足规范要求。 相似文献
9.
由于建筑功能的要求,在沈阳中汇广场SOHO塔楼的5层楼面处需对较多外框架柱进行结构转换,根据其特殊的平面布置情况,最终采用Y形斜撑转换形式。详细分析了Y形斜撑的受力特点,给出了其适用条件及设计要点。结构整体计算分析结果表明,该塔楼采用Y形斜撑转换能满足规范要求和预先设定的抗震性能目标;同时对转换构件进行了中震和大震作用下的有限元应力分析,并根据分析结果提出了可行的设计加强措施。 相似文献
10.
11.
结合实际高层建筑的设计,着重讨论了斜腹杆桁架转换结构和梁式转换层结构的内力分析、转换方案选择及斜腹杆桁架的构造措施等问题,同时对斜腹杆桁架进行了施工全过程监测,其结果可供其他类似建筑斜腹杆桁架转换结构设计时参考. 相似文献
12.
13.
14.
Scaffold design has become a popular research topic in recent years, likely because of the high rate of collapse for this structural form and its nature of under estimated loads close to the design loads, as opposed to permanent structures under remote statistical live and wind loads. This paper investigates the load capacities and failure modes of the system scaffold structure in various setups in construction and it is based on experimental tests supplemented by analyses. The parameters for system scaffolds studied in this paper include number of stories, ground heights, boundary conditions, presence of diagonal bracings and joint positions. The numerical studies quantify the load capacity of a system scaffold against addition of diagonal bracings. However, the load capacities of a system scaffold structure with varied spigot-joint positions on vertical props and with varied ground heights do not affect much the load capacity. Since the axial force of diagonal bracings on a system scaffold structure does not significantly increase with the vertical load, the diagonal bracings of the structure can be reduced in size for cost saving. A comparison between analyses and experimental tests conducted in this study confirmed the joint stiffness of different members used in the system scaffolds. Using the joint stiffness, the ultimate design loads of the system scaffolds with different number of stories were computed and quantified. The findings will be useful for accurate determination of the ultimate load capacity of complex system scaffolds used in construction sites. 相似文献
15.
16.
井字梁楼盖在纵横方向均具有较大刚度,易于获取较大空间,在公共建筑中较常采用,但相对正放井字梁而言,斜放井字梁楼盖应用较少。文章通过三个实际工程案例表明,在某些特定项目中,只要控制好结构尺寸,分析准确,采取相应的结构加强措施,采用大跨斜放井字梁楼盖能够确保结构安全,且传力比正放时更为合理,能有效增加建筑净高,具有更好的建筑美感,能够取得较好的综合效益。最后探讨了大跨斜放井字梁楼盖的尺寸确定原则、梁系布置原则和设计要点,并提出了大跨斜放井字梁楼盖施工注意事项。 相似文献
17.
现代工程设计团队的创造力与团队的领导力及知识管理水平关系密切,为了寻求提升工程设计团队创造力的有效途径,在理论分析基础上构建变革型领导力调节下的工程设计团队知识管理对创造力的影响机理模型,通过问卷调查方式获得 128 份有效数据。实证分析结果验证了模型的部分假设,研究表明:知识管理对工程设计团队创造力具有显著正向影响,并在变革型领导力对团队创造力的影响中起到部分中介作用;变革型领导力的德行垂范和个性化关怀两个维度在知识管理对工程设计团队创造力的影响中起到调节作用。研究结果有助于指导工程设计团队寻找提升创造力的方法,对于探索工程设计团队领导力、知识管理和创造力之间的相互关系具有一定的参考价值。 相似文献
18.
19.
Design and specification compilation of a modular‐prefabricated high‐rise steel frame structure with diagonal braces part II: Elastic–plastic time‐history analysis and joint design 下载免费PDF全文
Xuechun Liu Xinning He Ailin Zhang Chen Tian Xun Zhang Yongqiang Tan 《The Structural Design of Tall and Special Buildings》2018,27(2)
The use of modular‐prefabricated steel structures has distinct advantages, such as rapid construction, industrial production, and environmental protection. Although this type of structure has been extensively employed around the world, it is primarily used for low‐rise buildings; its application in high‐rise buildings is limited. This paper proposes a new type of modular‐prefabricated high‐rise steel frame structure with diagonal braces. An elastic–plastic time‐history analysis of a 30‐storey building during rare earthquakes was performed. The base shear, storey drift, stress, damage characteristics, and other performances of the structure were investigated. According to the mechanism analysis, finite element simulation, and model test, the formulas for the elastic and elastic–plastic design of the truss–column connection, column–column flange connection, and diagonal brace–truss connection are proposed in this paper. The control parameters for the structural design are also discussed. This study provides an important reference for the research and design of this type of modular‐prefabricated high‐rise steel structure. The design method has been compiled into a design specification named Technical Specifications for Prefabricated Steel Frame Structure with Diagonal Bracing Joints, which is unique for this type of structure. 相似文献
20.