共查询到19条相似文献,搜索用时 68 毫秒
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该工程为带有多层行车的重型钢结构厂房,竖向构件采用钢管混凝土格构柱+H型钢柱,屋面采用变截面钢梁。这里主要介绍该工程的结构设计思路、构造要求、计算依据和结果,还对钢管混凝土格构柱的设计做了较深入的阐述并对其经济性提出了一些看法。 相似文献
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结合工程实例,对于典型重型工业厂房的结构设计选型进行分析。通过模型计算,比较了钢格构工字柱、4管钢管混凝土柱和2管钢管混凝土柱3种柱系统的结构性能和经济指标,最后确定采用2管钢管混凝土柱。简洁的钢管混凝土体系增加了厂房有效使用面积,综合效益明显。 相似文献
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以某重型机器厂重型粗加工项目为例,通过对多方案结构选型的一系列计算,对"钢管混凝土格构柱+实腹钢梁"的钢框架结构设计进行了深入探讨,从而为类似重型厂房结构设计积累经验。 相似文献
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本文介绍了某重型钢结构厂房结构设计的新特点,对桩基选型、吊车梁、格构柱肢等重要结构构件的设计进行分析对比,可供同行交流。 相似文献
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森松重工(江苏)有限公司主厂房为全钢结构单层厂房,厂房总建筑面积4×104 m2,总用钢量1×104 t.该工程钢柱为钢管格构式,柱距最大的达25.8 m,单根钢柱最重达90 t(截面长3.12m,宽2.52m,柱高43.55 m),高耸且大吨位的钢柱安全平稳地吊装固定需要充分的吊前准备、详细的验算和严密的过程控制.文章就吊装最大钢柱的吊装技术进行阐述. 相似文献
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本文根据任意应力—温度途径下混凝土受压本构关系,给出了火灾下钢管混凝土构件温度内力的分析方法通过大量计算,得到了火灾下两端嵌固钢管混凝土构件温度内力的简化计算公式。 相似文献
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钢管混凝土拱桥计算理论研究进展 总被引:44,自引:2,他引:44
综述了钢管混凝土拱桥设计计算理论的研究进展,着重刚度取值、内力计算、应力计算与验算、极限承载力验算、局部受力计算、稳定计算与验算、变形计算与验算和动力性能分析等,同时指出存在的主要问题和今后努力的方向。 相似文献
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M.R. Bambach 《Thin》2011
The behaviour of hollow and concrete filled thin-walled steel tubular members subjected to transverse impact was previously investigated experimentally and theoretically. The members were restrained axially and rotationally at their ends. In this paper the study is extended to investigate nominally identically sized stainless steel tubes, tested experimentally under the same conditions. Comparisons between the performance of the two materials are made. Both the steel and stainless steel tubular members, hollow and concrete filled, are then modelled numerically. The FE models are validated against the experiments, and subsequently extended to investigate the general behaviour of such members when used as columns or other axially load bearing structures. The influences of axial pre-load, rotational restraint at the member ends, axial restraint, metal material properties and concrete filling, are investigated. In particular, their effect on the capacity of the members to absorb transverse impact energy. A general design procedure for metal tubular members with or without concrete filling subjected to transverse impact is developed, in a format aligned with current static structural steel specifications. 相似文献
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《Thin》2014
A concrete filled elliptical/oval steel tubular (CFEST) member consists of elliptical/oval steel tube and in-filled concrete. The CFEST member is a new type of steel–concrete composite member and is part of a family of concrete filled steel tubular members known as CFT. The present study aims to investigate, experimentally, the characteristics of CFEST stub columns under centric loading. The main test parameters selected are diameter-to-thickness and diameters ratios of elliptical/oval steel tube. From the results, local buckling of the elliptical/oval steel tube associated with shear failure of in-filled concrete could be observed. Axial loading capacity decreased as diameter-to-thickness ratio increased. Whereas, those capacities normalized by the summation of the individual strengths, namely the elliptical/oval steel tube and in-filled concrete strengths, are regulated in case the diameter-to-thickness ratio becomes larger. Finally, a method to predict the axial loading capacity induced by confinement effects of the in-filled concrete is proposed. 相似文献
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Fire behaviour of concrete filled elliptical steel columns 总被引:1,自引:0,他引:1
In this work, a non-linear three-dimensional finite element model is presented in order to study the behaviour of axially loaded concrete filled elliptical hollow section (CFEHS) columns exposed to fire. This study builds on previous work carried out by the authors on concrete filled circular hollow section (CFCHS) columns both at room temperature and in fire. The numerical model is first validated at room temperature against a series of experiments on CFEHS stub columns available in the literature and subsequently extended to study the performance of slender columns at elevated temperatures. The aim of this work is to understand and represent the behaviour of axially loaded CFEHS columns in fire situations and to compare their effectiveness with that of the circular concrete filled tubular (CFT) columns. Parametric studies to explore the influence of variation in global member slenderness, load level, cross-section slenderness and section size are presented. Finally, guidance on the fire design of CFEHS columns is proposed: it is recommended to follow the guidelines of Clause 4.3.5.1 in EN 1994-1-2, but employing the flexural stiffness reduction coefficients established in the French National Annex with an equivalent EHS diameter equal to P/π, where P is the perimeter of the ellipse. 相似文献
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钢管混凝土结构及其在我国桥梁中的应用 总被引:1,自引:1,他引:0
在介绍钢管混凝土结构特点的基础上,分析了该结构的优点及目前的计算理论和方法,论述了钢管混凝土在桥梁结构中的应用现状和目前急需解决的问题,从而取得良好的经济效益和建筑效果。 相似文献
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This paper presents a numerical investigation on the post-fire behaviour of concrete filled steel tubular (CFST) column to restrained steel beam joint. An entire loading and fire phase, including ambient loading, heating with constant loads, cooling with constant loads and post-fire loading, was employed in the numerical analysis, and a finite element analysis (FEA) model was built to simulate the behaviour of CFST column to axially and rotationally restrained steel beam joints with external diaphragm connections under the entire loading and fire phase. For validation, the proposed modelling method was used to predict the test results of CFST columns and joints in fire and post-fire. The comparison demonstrates that the accuracy of the proposed FEA model is acceptable. Afterwards, the FEA model was used to analyse the mechanics characteristics of CFST column to restrained steel beam joints in the entire loading and fire phase. Based on the numerical analysis, the joint moment versus relative rotation angle relationship in the entire loading and fire phase was addressed, and the residual joint strength index and stiffness index were defined to evaluate the post-fire performance of joints. Finally, simplified calculating formulas were proposed to calculate the two indexes, which provide a simply and feasible method to evaluate the post-fire performance of external diaphragm joints in the CFST column - steel beam framed structure. 相似文献