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框架结构施工质量直接影响高层建筑整体性能和安全性。以某高层建筑工程为例,探讨了高层建筑框架结构施工过程中的测量与放线、框架柱模板支设、梁柱节点钢筋捆扎、梁柱节点混凝土浇筑等质量控制措施。 相似文献
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高层建筑梁柱节点核心区是设计和施工的重点。设计上,梁柱节点核心区对结构抗震力学性能有显著影响,在抗震设计要求上使节点核心区晚于梁、柱破坏,承受的剪力也要比柱墙身承受的剪力大得多;施工上,梁柱节点核心区钢筋混凝土施工技术较为复杂,专业性较强,需要考虑的相关工程内容和工程要素较多,对施工单位提出了非常高的施工专业技术要求。本文结合罗庄一期项目简要论述了梁柱墙节点核心区部位特点和梁柱节点核心区箍筋安装情况,分析总结了梁柱节点核心区混凝土浇筑施工技术,其能大幅度提升高层建筑梁柱节点核心区钢筋混凝土施工质量,不仅节约了人工成本,还提高了施工效率。 相似文献
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本文针对高层建筑框架结构顶层端节点的钢筋搭接、梁柱节点的模板施工、节点处混凝土浇筑,梁柱节点的抗裂防裂4个问题,提出了相应的施工技术措施. 相似文献
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本文针时高层建筑框架结构顶层端节点的钢筋搭接、梁柱节点的模板施工、节点处混凝土浇筑、梁柱节点的抗裂防裂4个问题,提出了相应的施工技术措施。 相似文献
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高层建筑的梁柱节点是建筑主体结构之间相互联系的枢纽,负责承受主要的轴力、弯矩和剪力等复杂受力系统,其强度与荷载能力在保障整个框架结构安全体系中处于核心地位。当前在高层建筑框架结构工程中,仍然存在梁柱节点细部构造设计不细致、施工程序不合理、混凝土高低等级相互渗入等安全隐患,基于此,对一些高层建筑框架结构梁柱节点施工技术的问题进行分析,以供业内人士参考。 相似文献
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介绍单层工业厂房中,采用钢管混凝土柱时常用的一些节点构造。较详细地归纳和介绍了高层建筑中钢管混凝土柱与梁的节点,分刚性节点和铰接节点。还简要介绍了管柱对接接头的构造和施工方法。 相似文献
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不同强度等级混凝土框架梁柱节点的处理措施 总被引:2,自引:0,他引:2
在高层钢筋凝土结构设计中,柱和梁板普遍采用不同强度等级的混凝土,即柱使用高强混凝土而梁板为普通混凝土。由于一些设计可操作性不够,造成梁柱节点施工时出现问题。针对这种做法在实际施工中所暴露出来的问题,结合实际案例进行论证,并提出了梁柱节点的适宜处理措施。 相似文献
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Experimental investigation of the influence of steel joints upon the flexural capacity of precast concrete columns
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In previous studies, the authors have shown that successful modular construction depends on using the correct types of joint connections. In this experimental study, steel beam–column joint connections were shown to be very efficient in facilitating the construction of modular frames while ensuring sufficient flexural moment capacity at the joints to resist lateral loads. This research also included an investigation of the behavior, the crack pattern, and the flexural moment capacity of concrete columns with hybrid composite joints by means of structural experiments on three specimens. Three column specimens were subjected to cyclic loading under displacement control using an oil jack. The influence of including steel sections at the beam–column joint upon the flexural moment capacity of the column was studied, and the use of concrete–steel hybrid composite joints was found to increase the flexural structural performance of the concrete columns. The flexural moment capacity in the maximum load limit state of a concrete column with steel joints was 43.2% greater than that of a conventional reinforced concrete column without steel joints. The steel section in the joint was found to greatly contribute to the flexural moment capacity and to the modular construction technologies. 相似文献
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通过对变截面方钢管轻骨料混凝土柱-H钢梁圆弧扩大头隔板贯通节点和基本型节点进行低周往复加载试验,分析了该类节点的破坏形态、滞回性能、延性、承载力、刚度退化与耗能能力等。结果表明:隔板圆弧扩大头节点先在隔板圆弧扩大区形成塑性铰,随后梁腹板焊接孔开裂,梁翼缘对接焊缝延性拉断;基本型节点在梁翼缘对接焊缝侧边开裂,裂纹扩展迅速至脆断;隔板圆弧扩大头构造明显提高了节点延性和耗能能力,有效降低了节点区焊缝过于密集和焊接热影响区的交叉影响,避免了梁翼缘对接焊缝处的应力集中和过早脆断;隔板圆弧扩大头节点的承载力、塑性转角和耗能能力较基本型节点分别提高16.09%~22.25%、17.34%~63.94%和24.97%~44.32%;加载到节点破坏时,节点域和柱内轻骨料混凝土未发生压碎、剥离、拉裂或滑移破坏,说明该类节点的抗震性能主要受钢梁与隔板间焊缝影响。 相似文献
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Jürgen Meister 《Stahlbau》2005,74(1):22-32
Lateral torsional buckling of beams and columns of frames with semi‐rigid beam‐to‐column joints. Lateral torsional bucking safety of beams and columns of frames depends, among other things, on the ratio of the bending moment of the frame knee to the plastic moment resistance of the frame beam and the frame column respectively; in this context the ratio of the bending moment of the frame knee to the midspan bending moment of the frame beam is also of importance. Large bending moments of frame knees can cause all over “flexural buckling” of the lower flange of the frame beam if the frame beam is laterally supported only at the upper flange. Using semi‐rigid beam‐to‐column joints bending moments of frame knees can be decreased and production cost can be diminished. Considering a frame with welded beam‐to‐column joints the influence of the moment resistance of the frame knee (which depends on the type of joint) is discussed with respect to lateral torsional buckling safety of beams and columns of frames. The determination of the moment resistance and the moment‐rotation‐characteristic of beam‐to‐column joints is based on the rules given in EC 3 Annex J, which represents (outside the application range of finite‐element‐methods) the current level of technology achieved. 相似文献