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《钢结构设计规范》(GBJ1 7— 88)中没有预应力钢 混凝土组合结构方面的内容 ,针对福建会堂工程的设计实例 ,探讨了 3 5m单跨简支预应力钢 混凝土组合箱梁的结构设计方法。实际工程表明 ,预应力钢 混凝土组合结构比钢 混凝土组合梁更具有优越性 相似文献
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钢-混凝土组合梁与非组合梁的设计对比 总被引:1,自引:0,他引:1
本文根据《钢结构设计规范》(GBJ17-88)中的规定,按极限状态设计法对钢-混凝土组合梁与非组合梁进行了工程实例设计计算对比,表明组合梁结构有很大优越性,比非组合梁结构可降低梁高,提高结构刚度,从而可降低工程造价,加快施工进度,本例计算可少用钢材30%以上,挠度减少15%~65%。 相似文献
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戴益民 《四川建筑科学研究》2007,33(4):55-58
根据3根集中荷载作用下钢-混凝土预制板组合简支梁的试验结果,从组合梁的荷载-滑移、荷载-组合梁跨中全截面应变及荷载-挠度等方面对钢-混凝土预制板组合梁进行了试验分析,同时结合现有普通组合梁的设计理论,推导出这种新型组合结构的设计公式. 相似文献
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戴益民 《四川建筑科学研究》2007,33(4):55-58
根据3根集中荷载作用下钢-混凝土预制板组合简支梁的试验结果,从组合梁的荷载-滑移、荷载-组合梁跨中全截面应变及荷载-挠度等方面对钢-混凝土预制板组合梁进行了试验分析,同时结合现有普通组合梁的设计理论,推导出这种新型组合结构的设计公式。 相似文献
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设计了4组外包花纹钢-混凝土组合梁,研究了组合梁的荷载-挠度、荷载-应变和应变沿截面高度的分布曲线,并进行了相应地受力分析。结果表明,4组外包花纹钢-混凝土组合梁的破坏形式都为受弯破坏,梁端未见明显滑移;CACC-1、CACC-2、CACC-3和CACC-4组合梁混凝土翼板中钢筋屈服载荷作用时的实测挠度与组合梁极限载荷时的实测挠度的比值δ_(ut)/δ_(yt)分别为1.698、1.819、2.275和3.208,在负弯矩作用下,CACC-4组合梁的延性相对较差;同一截面不同位置的荷载-应变曲线可以较好的吻合,表明加载过程中钢梁底板不同位置的受力分布较为均匀;4种组合梁在有效宽度范围内的剪力滞后现象并没有影响到混凝土翼板中受力钢筋的共同作用效果;组合梁中配筋率的增加对开裂载荷不会造成明显影响,但是在相同载荷条件下,配筋率的变化会影响裂缝的产生和发展,组合梁混凝土翼板中配筋率愈大则对跨中裂缝的束缚作用愈强。 相似文献
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中国、欧洲钢-混凝土组合梁的设计规范比较 总被引:2,自引:2,他引:2
根据欧洲规范4和中国《钢结构设计规范》对简支组合梁的设计过程进行了对比,包括施工阶段与组合阶段承载力验算、剪力连接件设计、剪力验算、挠度验算及自振频率验算等。给出了相关工程实例计算并对设计结果进行了比较。结果表明:欧洲规范4对于钢-混凝土组合梁的设计过程的规定更加详细,通过中国《钢结构设计规范》进行设计所得的结果较欧洲规范4保守。 相似文献
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为了解决常规双钢板-混凝土组合结构整体性不足的问题,提出了一种采用增强槽钢连接件的双钢板-混凝土组合结构。为研究该组合结构受弯性能,对6根采用增强槽钢剪力连接件的双钢板-混凝土组合梁开展四点弯曲试验。研究参数为核心混凝土种类(超高性能混凝土及普通混凝土)、剪跨比、钢板厚度及连接件间距。试验结果表明:合理控制距厚比和剪跨比,试件将呈现弯曲破坏形式,并展现出良好的延性,增加钢板厚度和核心混凝土强度,截面受弯承载力得到提升。提出了该双钢板-混凝土组合梁受弯承载力理论分析模型,与试验结果比较表明,该理论分析模型能较好计算该组合梁承载力。同时,基于ABAQUS软件建立采用增强槽钢连接件双钢板-混凝土组合梁精细化有限元分析模型,与试验结果验证表明,该分析模型能精确模拟组合梁受力性能,可为该种组合结构的设计与应用提供基础。 相似文献
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Nikos D. Lagaros Efrossini Magoula 《The Structural Design of Tall and Special Buildings》2013,22(12):954-974
The traditional trial‐and‐error design approach is inefficient to determine an economical design satisfying also the safety criteria. Structural design optimization, on the other hand, provides a numerical procedure that can replace the traditional design approach with an automated one. The objective of this work is to propose a performance‐based seismic design procedure, formulated as a structural design optimization problem, for designing steel and steel–reinforced concrete composite buildings subject to interstorey drift limitations. For this purpose, eight test examples are considered, in particular four steel and four steel–reinforced concrete composite buildings are optimally designed with minimum initial cost. Life‐cycle cost analysis (LCCA) is considered as a reliable tool for measuring the damage cost due to future earthquakes that will occur during the design life of a structure. In this study, LCCA is employed for assessing the optimum designs obtained for steel and steel–reinforced concrete composite design practices. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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Xiaodan Ren Qiong Bai Chengdong Yang Jie Li 《The Structural Design of Tall and Special Buildings》2018,27(4)
For the seismic design of tall building structures, the behavior under severe earthquakes should be carefully considered and the upper limit of inter‐story deformations are often defined by the design codes. To improve the performance of structures under severe earthquakes, composite structural members, including steel reinforced column and steel plate reinforced shear wall, are often adopted. In the present work, the seismic behavior of tall buildings using steel–concrete composite columns and shear walls is investigated numerically. Fiber beam–column element models and multilayer shell models are adopted to establish the finite element model of structure, and the material nonlinearities are described by the plasticity and damage models. The accuracy of the developed models is verified by the experimental results of a single shear wall. Systematic numerical simulations are performed for the tall building structures subjected to different earthquakes. The comparative study indicates that the nonlinear redistribution of internal forces plays a very important role for the performance of tall buildings under severe earthquakes. 相似文献
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介绍了位于抗震设防六度区的苏州中银惠龙大厦带转换层超限高层结构的地基基础设计、主体结构抗震设计和抗震构造措施以及主要计算结果,并介绍了能承受较大不均匀荷载的并联双工字形型钢混凝土柱的设计。指出超限高层的结构设计更应注重抗震概念设计,从总体把握结构的抗震性能,加强抗震构造措施;采用圆钢管混凝土柱是减小柱截面尺寸、同时提高柱延性的有效办法。 相似文献
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详细地介绍了美国AISC LRFD( 99)规程、欧洲Eurocode 4 (EC4 - 94 )规程、日本AIJ规程以及中国JCJ0 1- 89规程、CECS2 8:90规程、DL T 5 0 85 - 1999规程中有关圆钢管混凝土构件刚度的计算方法。通过对比不同的计算公式 ,对上述各国规程中的刚度计算公式的建立思想与方法进行分析和说明 相似文献
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全国大中型城市多高层建筑迅速增多,高层建筑结构设计已成为建筑结构设计人员的重要工作内容。关于如何选择结构体系也成为设计人员经常面临的问题。对八度区某188m高层建筑分别采用混合结构和钢结构两种结构体系进行分析,通过比较两种结构体系受力性能和经济指标,得出对于本工程,钢结构体系明显优于混合结构体系,并分析各自的优缺点,供结构设计人员参考。 相似文献
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Concrete-filled tubes are often preferred for the construction of high-rise buildings because of their high strength and stiffness compared to conventional reinforced concrete or steel columns. However, prior to infilling of concrete, the steel tubes are subjected to preloads from upper floors arising from construction loads and permanent loads of the building. These preloads cause initial stresses and deformations in the steel tubes which would affect the load carrying capacity of the composite columns. In this paper, a design method based on a modified Eurocode 4 approach, incorporating the effect of preload, is proposed to evaluate the axial capacity of concrete filled composite columns. Eight full-scale composite column specimens were tested. Parameters studied included the strength of the concrete infill, slenderness of the columns and the amount of preload applied on the steel tubes. Results obtained from the proposed method are compared against test results and other published data. Comparison studies show that the test results are on average 3% higher than predicted results with a standard deviation of 0.089. Finite element analyses are also performed for systematic verification, and the results are 8% higher than predicted results. It is conclude that the proposed design method is accurate and mostly conservative and can be readily used in the context of Eurocode 4: Part 1.1 for designing composite columns. 相似文献
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本文概述了我国目前高层钢结构建筑现状,指出了我国高层钢结构发展的三大问题,即:国产化问题、综合效益问题和结构设计问题。本文论述了我国高层钢结构国产化已具备的条件,分析了高层建筑各部分投资比例及采用钢结构在经济性能和结构性能上的优势,讨论了目前我国高层钢结构设计存在的主要问题。 相似文献