双型钢混凝土转换梁及其节点的抗震性能的研究

发布时间：2018-01-17 22:19

本文关键词：双型钢混凝土转换梁及其节点的抗震性能的研究　出处：《湖南大学》2014年博士论文　论文类型：学位论文

【摘要】：本文以广东某高层建筑为工程背景，针对大跨度转换结构，提出了双型钢混凝土转换梁及其节点的构造新组合形式，解决了工程设计中面临的难题。双型钢混凝土转换梁是由外包钢筋骨架、混凝土和组合型钢等三部分组成，其中组合型钢由两根工字钢通过缀板连接而成。为了施工方便，上部被转换部型钢柱与双型钢转换梁采用了端板螺栓连接的方式。为明确双型钢混凝土转换梁及其节点的各项抗震性能指标，本文从构件、节点、结构和构造等四方面开展研究工作。第一方面，本文通过6组双型钢混凝土梁的四点加载静力弯曲试验，研究其箍筋率、型钢翼缘尺寸、型钢间距、纵筋配筋率和销钉布置对双型钢混凝土梁的开裂荷载和极限荷载的影响。研究发现双型钢混凝土梁具有较高的承载能力和较好的延性。文中给出了双型钢混凝土梁的抗弯承载力计算公式。根据试验数据并结合叠加设计原理计算数据，修正了约束混凝土的抗弯承载力以及公式的整体性。本文将双型钢混凝土梁的短期效应刚度分成三部分：钢筋混凝土刚度、双型钢刚度和约束混凝土刚度。提出了短期效应刚度及相应的挠度计算公式。通过分析屈服弯矩和极限弯矩的计算公式，推出双型钢混凝土梁的延性系数（构件延性和截面延性）计算公式。第二方面，通过两个双型钢混凝土梁式转换节点竖向和水平荷载作用下的低周反复荷载试验，研究了节点的破坏形态、承载能力、刚度、滞回特性、延性、耗能能力及关键位置钢筋和型钢的应变等性能。试验结果反应出双型钢混凝土转换梁柱节点符合抗震设计关于转换结构的“强梁强柱，更强节点”和“强转换层，弱框架层”两个破坏机制，具有良好的转换结构的特性。根据试验数据和有限元分析结果，本章研究了双型钢混凝土梁式转换节点的抗剪机理，并提出了其抗剪承载力计算公式。通过对比“日本规范”、我国“JGJ规范”和“YB规范”的抗剪承载力计算值，表明本章提出的节点抗剪承载力计算公式的合理性。另外，本章还对被转换型钢柱的“端板螺栓连接”的设计方法做了比较和归纳。第三方面，通过1:35缩尺模型进行单向、双向和三向地震作用下振动台试验，研究双型钢混凝土转换梁在结构中抗震性能。振动台实验的结果表明双型钢混凝土梁式转换结构具有三大破坏机制。通过性能分析，双型钢混凝土梁式转换结构在多遇地震、设防烈度地震和罕遇地震均能满足设定的各项性能指标，表现出较好的变形能力和抗震性能；通过反应谱法、弹塑性时程分析法、弹塑性静力推覆法和多水准能力谱法研究了双型钢混凝土转换梁及其节点的应力、变形及其损伤指标，结果显示，，双型钢混凝土转换梁及其节点具有较好抗震性能，更值得一提的是，其抗剪性能优越。第四方面，结合我国现行规范、实验数据和现场施工情况，给出了双型钢混凝土转换梁及其节点的材料、构造和施工方面的建议。在材料中，结合我国现行的几本型钢规范给出双型钢混凝土转换梁及其节点的各种组成材料的规定。在构造中，给出了双型钢混凝土构件应该遵循的一般构造和具有自身特点的构造设计。在施工中，总结了现场施工过程的工艺。
[Abstract]:In this paper, a high-rise building in Guangdong as the engineering background, for a large span transfer structure, puts forward the structure of the new combination of two steel reinforced concrete beams and joints, to solve the problem of engineering design. Two steel reinforced concrete transfer beam is a reinforced concrete skeleton, and the combination of steel and other three parts among them, combined by two steel I-beam through batten plates connected together. In order to facilitate the construction of the upper converted steel column and double steel girder with bolted end plate connection way. For the definition of steel reinforced concrete transfer beam and node seismic performance indexes, this paper from the member nodes, carry out four aspects of research and structure.
First, based on the four point bending test under static load the 6 pairs of steel reinforced concrete beam, study the stirrup ratio of flange, steel, steel spacing, effect of longitudinal reinforcement ratio and the pin layout of double steel concrete beams cracking load and ultimate load. The study found that two steel reinforced concrete the beam has high bearing capacity and good ductility. Given two steel reinforced concrete beam flexural capacity calculation. According to the experimental data and calculated data according to the superposition principle of design, the overall correction of bending bearing capacity formula and confined concrete. The short-term effect of double reinforced concrete beams the stiffness is divided into three parts: reinforced concrete steel double stiffness, stiffness and stiffness of confined concrete is proposed. The calculation formula of short-term effects of stiffness and the corresponding calculation formula of deflection. Through the analysis of the yield moment and ultimate moment, push The formula for calculating the ductility coefficient (ductility and cross section ductility) of a double type steel concrete beam.
Second, through two pairs of steel reinforced concrete beam type conversion function node of vertical and horizontal loads under low cyclic loading test, failure modes of the joints, bearing capacity, stiffness, hysteretic behavior, ductility, energy dissipation capacity and strain properties of the key position of steel and steel. The test results reflect double steel reinforced concrete transfer beam column joints with seismic design on the transfer structure "strong column beam and stronger joint" and "strong weak conversion layer, frame layer two failure mechanism, has the characteristics of good conversion structure. According to the test data and the results of finite element analysis, this chapter studies the double steel reinforced concrete beam type conversion joint shear mechanism and the calculation formula of the shear bearing capacity is proposed. By comparing the" Japanese norms ", China's" JGJ specification "and" YB specification "for calculating the shear strength values show that this chapter proposes anti node The calculation formula of shear bearing capacity is reasonable. In addition, this chapter also compares and summarizes the design method of "end plate bolt connection" of converted steel columns.
Third, through the 1:35 scale model of one-way, two-way and three earthquake shaking table test on two steel reinforced concrete transfer beam structure in seismic performance. The experimental results show that the double vibration of steel reinforced concrete beam type transfer structure with three failure mechanism. Through the performance analysis, two steel reinforced concrete beams transfer structure in the earthquake fortification intensity, earthquake and rare earthquake can meet the performance indicators set, show the deformation capacity and good seismic performance; the response spectrum method, the elastic-plastic time history analysis method, the stress of the steel reinforced concrete transfer beam and double node static pushover multi level method and capacity spectrum method, the deformation and the damage index, results show that the double steel reinforced concrete transfer beam and joint has good seismic performance, it is worth mentioning that the shear performance is superior.
Fourth, according to China standard, experimental data and site construction conditions, given two steel reinforced concrete transfer beam and joint material, construction and construction suggestions. In the material, combined with a variety of provisions in China a few of the current standard of steel are two steel reinforced concrete transfer beam and the composition of the material node in construction, the double steel reinforced concrete members should follow the general structure and structural design. With its own characteristics in construction, summarizes the process of the construction process.

【学位授予单位】：湖南大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU398.9;TU352.11

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