高强度螺栓承压型连接适用范围的讨论

针对现行规范中高强度螺栓承压型连接不应用于直接承受动力荷载结构的规定,引出关于动力荷载的讨论,进而讨论承压型连接高强螺栓的适用范围,比较了各种规范对于高强度螺栓连接的规定,明确其基本要求之一是弹性阶段连接不能滑移,据此要求,对高强度螺栓承压型连接未滑移时和已滑移时的承载力与摩擦型连接承载力进行比较,最后总结了高强度螺栓承压型连接的各种适用范围。     

中美钢结构规范高强螺栓连接设计比较

根据中美钢结构设计规范的高强螺栓摩擦型和承压型连接设计方法进行研究,结合算例分析两种连接方式以及中美规范的差异与相应的原因,为相关行业设计人员提供参考。     

承压型高强螺栓受力性能试验研究

通过单个承压型高强度螺栓与承压型高强度螺栓群的承载能力试验,研究了高强螺栓预拉力和摩擦面抗滑移系数对承压型高强螺栓受力性能的影响和规律。分别对不同预拉力、摩擦面抗滑移系数下单个承压型高强螺栓和螺栓群的承载力进行了研究和分析。研究结果表明,承压型高强螺栓预拉力所造成的摩擦力只能延缓螺栓滑动的出现,其抗剪承载力不受抗滑移系数及预拉力的影响,为实际工程中承压型连接高强螺栓的设计和施工提供了参考。     

轻钢结构中承压型高强度螺栓连接的设计与施工

简述轻钢结构中的几种栓接形式,其中着重对中美两国承压型高强螺栓连接的设计与施工原理进行了分析与比较,并就我国在轻钢结构中使用承压型高强螺栓连接存在的问题提出合理化建议。     

工程起重机械高强度螺栓计算方法

为提高螺栓连接设计的可靠性,针对工程起重机械行业普遍采用的高强度螺栓,分析摩擦型高强度螺栓与承压型高强度螺栓两种连接类型的性能、特点及抗拉、抗剪承载力设计值的计算方法,并对两种类型螺栓连接的计算方法进行研究和分析,以实际算例验证了计算方法的有效性。     

广东科学中心屋面檩条设计

对广东科学中心屋面维护结构檩条设计及节点连接形式进行了介绍和分析,并探讨了在维护结构和主体结构节点连接中使用承压型高强螺栓连接的工作机理、力学性能,为工程设计中应用提供有益的参考。     

钢结构中高强度螺栓连接形式相关问题的探讨

对摩擦型和承压型连接的高强度螺栓受力特征和应用范围进行对比分析,并对高强度螺栓连接在设计应用过程中存在的某些问题及影响因素进行探讨,给出钢结构高强螺栓连接设计时有价值的建议。     

摩擦型高强螺栓连接节点性能试验研究

通过试验,对6个采用摩擦型高强螺栓连接的钢梁和连接板连接节点域在往复荷载作用下的承载力、破坏形态以及变形性能等进行了研究。研究结果表明,摩擦型高强螺栓连接节点能够传递一定弯矩并具有较强变形能力,但其承载力较差,在设计中宜作为铰接节点处理。另外螺栓规格及螺栓排列方式对节点性能也有较大影响。     

浅析设计与施工中的高强螺栓连接

通过相关试验,探讨了扭矩系数的检验及其影响因素,同时介绍了抗滑移系数和预拉力控制方法。通过摩擦型和承压型连接高强螺栓的计算,对比了两种连接的结构安全性。     

普通螺栓与高强螺栓在梁柱连接中的应用

分析了普通螺栓与高强摩擦型螺栓在梁柱抗弯连接中的计算方法,提出两种螺栓在工程实践中,采用普通螺栓相比高强摩擦型螺栓的优点,避免工程设计人员不区分结构承受荷载性质而全部采用高强摩擦型螺栓连接,造成建筑成本提高,并提出了在何种荷载状态下采用哪种螺栓比较合理,来保证梁柱节点设计的合理性。     

建筑结构缝的设置及实例

结合工程实例,根据国家建筑设计规范,对结构设计中的伸缩缝、沉降缝、抗震缝及施工缝的作用及设置规定进行了分析探讨,指出设置结构缝时,应根据建筑物的具体特点,合理解决结构安全和建筑使用功能的矛盾。     

Numerical analyses of semi-rigid joints subjected to bending with and without axial force

Socket joint systems are typical semi-rigid joints used in space structures. This paper presents numerical analyses of semi-rigid joint systems in which the bolts are pretensioned. Eleven numerical models of socket joints are studied: three of them are subjected to bending and the others are subjected to proportional bending and axial compression. Moment–rotation relationships of the joints are obtained using models in which the material and geometric nonlinearity are taken into account. The load-carrying mechanism of socket joint system is investigated in detail through the numerical analysis. Through comparison of the finite element analysis (FEA) and corresponding test measurements, it is shown that the proposed FEA models can be used effectively to describe the mechanical performance of the semi-rigid joints in spatial structures, including the initial bending stiffness, ultimate bending moment, deformation and the failure mode.     

Structural assessment of minor axis steel joints using photoelasticity and finite elements

Traditionally, the steel portal frame design assumes that beam-to-column joints are rigid or pinned. However, it is largely recognized that the great majority of joints do not exhibit such idealized behaviour transmitting bending moments with non-negligible rotations. These joints are called semi-rigid and their design should be performed according to their actual structural behaviour. When minor axis beam-to-column joints are considered, the adopted design process generally assumes a flexible response although this is not true for the great majority of structural joints. Minor axis joints present a distinct behaviour that differentiates them from major axis joints. In fact, the absence of transverse stiffeners implies that the column web must resist all the tensile and compressive forces arising from the beam flanges in bending, akin to a plate supported on its vertical sides. In order to evaluate this component’s behaviour, this paper presents a comparison between results obtained from a finite element model analysis and experiments. The experimental programme was based on the use of reflection photoelasticity techniques to determine the column web stress and strain distribution present in minor axis semi-rigid joints. This technique, although widely used for determining stress and strain distributions in other applications, was first used in this investigation to determine the semi-rigid joints structural response.     

地震作用下钢框架梁柱异型节点破坏模式分析

钢框架梁柱节点是钢结构设计中的重要部位和受力的薄弱环节,通过试验的方法研究了此类节点的受力性能、破坏模式和规律,以期为工程实际提供初步的参考。     

大型沉管隧道暗埋段主体结构防水施工技术

地下工程结构防水一直是人们关注的话题,也是日后工程投入运营阶段,易出现质量问题的环节。通过对我国高烈度区第一条沉管隧道——天津市滨海新区中央大道海河隧道工程暗埋段施工为背景,研究总结出施工缝、变形缝、围护结构穿过防水层、主体结构外包防水卷材等关键节点防水设计与施工技术。     

碳纤维复合材料板与钢板胶-螺混合双搭接接头拉伸性能试验研究

对双层搭接的碳纤维复合材料板与钢板胶-螺混合连接在单调受拉伸荷载下的拉伸性能展开试验研究;考察其极限承载力、应变分布以及破坏模式;并与螺栓连接、纯胶连接方式比较;同时还考虑制作工艺对混合连接的影响。结果表明,混合连接承载力稳定。两种工艺制作的固定尺寸的混合节点中,先胶结再钻孔的节点在一定数量范围内增加螺栓数会使承载力上升,但过多使用螺栓承载力反而下降;先钻孔再涂胶的节点螺栓和胶层协同工作性能好,但制作工艺要求更高。     

The semi-rigid behaviour of three-dimensional steel beam-to-column steel joints subjected to proportional loading. Part II: Theoretical model and validation

The component method proposed by the Eurocode is an excellent and versatile analysis tool, which can be applied to a wide variety of joints. However, it lacks appropriate components to predict the behaviour of minor-axis and three-dimensional joints. In this paper, a new component for laterally supported plates in bending (applied here to the column web and to the additional plate in bending) is presented and applied to minor-axis joints. Also, complete elastic models for both major- and minor-axis three-dimensional joints are presented. The proposed models take into account the effects on the elastic behaviour of each component caused by proportional loading along both axes.     

钢筋混凝土异形柱框架节点抗震性能试验

对6个T形截面柱框架节点试件(2/3缩尺)进行低周期反复荷载作用下的试验研究。分别以梁截面高度、柱轴压比和节点区水平箍筋体积配箍率为变量参数,研究其对节点区裂缝的形成与开展、节点的破坏机理和节点抗震性能(其中包括梁纵向钢筋锚固、节点延性和耗能等)的影响。提出在低周期反复荷载作用下T形柱框架节点的裂缝呈反“K”型,而不是类似于常规矩形节点的“X”型交叉裂缝,其受力机理偏于较陡的斜压杆受力模型。同时指出节点区翼缘板宽度对节点抗震性能的影响与梁柱抗弯刚度比有关。     

型钢桁架K形节点的加固措施及试验研究

大连某工程在结构设计中采用了宽翼缘H型钢桁架结构,其中K形节点较多,在设计过程中,采用杆系程序计算时,强度和刚度能满足设计规范要求。目前涉及宽翼缘K形节点的资料较少,有限元分析结果表明,部分节点腹板强度不能满足设计要求,需要进行加固补强。为了验证节点加固补强措施的有效性,对宽翼缘H型钢K形节点进行了试验研究。通过试验,得到K形节点的工作机理、承载力、刚度及退化进程、延性、耗能能力和破坏特性等,为K形节点加固补强提供了设计依据。