【作者】 姜涛；

【导师】 王静峰；

【作者基本信息】 合肥工业大学 ， 结构工程， 2012， 硕士

【摘要】 钢管混凝土具有承载力高、塑性和韧性好、制作和施工方便、耐火性能好、经济性好等特点。目前国内外对H型钢柱组合梁端板连接节点研究较多，但对于钢管混凝土柱－组合梁端板连接节点研究较少见。本文利用组件法研究了半刚性钢管混凝土组合框架节点抗弯承载力、初始刚度和转动能力的计算模型与计算方法，主要研究工作如下：(1)本文进行了4个足尺半刚性钢管混凝土组合框架节点的低周反复加载试验。研究参数是柱截面类型和端板类型，详细地考察了组合节点的水平荷载－水平位移关系滞回曲线与骨架曲线、弯矩－转角关系滞回曲线与骨架曲线、破坏形态、刚度和强度退化规律、延性系数、耗能能力和关键部位的应变分布规律等。试验表明：钢管混凝土组合框架端板连接节点具有较高的强度、刚度和延性，可以安全可靠地应用于多层抗弯组合框架结构。(2)考虑混凝土楼板对节点承载力和破坏形式的影响，建立力学计算模型，将抗弯承载力转换为混凝土楼板内的混凝土、钢筋和每个高强螺栓所承受的拉力或压力。确定混凝土、钢筋、高强螺栓等受力组件的极限承载力，根据力学平衡条件计算出节点中和轴所处不同位置时，组合节点相应的抗弯承载力。(3)借鉴欧洲规范提出的计算纯钢节点初始刚度组件法，分析讨论对连接刚度有贡献的一系列组件：混凝土楼板的混凝土、钢筋、抗剪栓钉、高强螺栓以及螺栓端部焊接钢筋的锚固作用。将这些组件简化为具有各自刚度、受力会发生形变的“弹簧”，把这些“弹簧”并联或串联组合起来，建立简化模型。由每个组件的初始刚度和简化模型的变形协调方程，得到组合节点的初始刚度。(4)对组合节点的转动能力进行理论分析。分别讨论了组合节点在正弯矩、负弯矩作用下的性能。对于负弯矩作用下的极限抗弯承载力对应于混凝土混凝土楼板内的钢筋达到其极限应变；对于正弯矩作用情况下的极限抗弯承载力对应于混凝土混凝土楼板的受压破坏。在保证柱壁不发生局部屈曲的情况下，由组合节点的转动能力判定这种半刚性连接的延性是否满足要求。(5)在综合前面各章节研究内容的基础上，提出了半刚性钢管混凝土组合框架节点弯矩－转角关系简化计算公式，用试验理论验证了公式的准确性，并对实际工程提出建议。更多还原

【Abstract】 Steel tube concrete with high bearing capacity, plasticity and toughness, goodproduction and construction is convenient, refractory performance is good, theeconomy is good wait for a characteristic. In present the H steel composite columnthe endplate connected node to research more, but for steel tube concrete columnand the composite board connected node research is rare. By using the method ofcomponents of semi-rigid combination of concrete filled steel tubular frame nodeflexural strength, initial stiffness and rotation ability of the calculation model andthe calculation method, with the actual engineering as a reference and design basis,and carry out the research:(1) In this paper four-full scale semi-rigid steel tube concrete combination frame of thenode low cyclic loading test. Study the column section type parameters are and the boardtype, detailed survey of the combination of the node horizontal load-horizontaldisplacement hysteresis curve relationship with skeleton curves, moment-rotationrelationship hysteresis curve and skeleton curves, failure pattern, stiffness and strengthdegradation, ductility coefficient, energy dissipation capacity and key parts of straindistribution, etc. Experiment shows that the combination of concrete filled steel tubularframe board connected node with high strength, stiffness and ductility, can be safe andreliable used in multilayer bending combination frame structure.(2) Consider the bearing capacity of the concrete floor and destroy the form of influence,establish mechanics calculation model, the flexural strength into combination in the floorconcrete, steel and each of the high strength bolts are under tension or pressure.Determining concrete, steel, high strength bolt stress components such as the ultimatebearing capacity, according to the mechanical balance condition node and calculated atdifferent location in the shaft, the combination of the corresponding node tension capacity.(3) The calculation of European standard reference proposed initial stiffness componentswhilst node method, analyzes and discusses the contribution of connection stiffness have aseries of components: combination of floor concrete, steel, shear the stud, the high strengthbolts and bolt at the end of the welding of steel anchor role. Will these components fordifferent simplified stiffness, the force will deform ‘spring’, the ‘spring’ parallel or tandemcombination rises, a simplified model. Each component of the initial stiffness andsimplified model compatibility equations of deformation, get combination node of the initial rotary stiffness.(4) Discussed combination node in the negative moment is bending moment, under theaction of performance. For negative bending moment tension capacity corresponding to thelimit of the combination of the reinforced concrete floor reached its limit within strain; Forthe moment is the limit role tension capacity corresponding to the concrete composite floorpressure of destruction. In that column wall not occur under the condition of the localbuckling, the combination of the node rotation ability judgement this kind of semi-rigidconnection ductility whether meet the requirements.(5) In the comprehensive front of research contents of each chapter are put forward, basedon the combination of semi-rigid concrete filled steel tube bending moment-corner nodesframework design of some opinions relationship, through the test the reliability of thesimplified calculation method, and puts forward some Suggestions on the actual design.更多还原