【作者】 强静延；

【导师】 赵世春；

【作者基本信息】 西南交通大学 ， 结构工程， 2002， 硕士

【摘要】 桁架式钢骨混凝土是空腹式钢骨混凝土(Steel Reinforced Concrete，以下简称SRC)的一种，一般认为其抗震性能不及实腹式SRC构件，而与普通钢筋混凝土(Reinforced Concrete，以下简称RC)构件基本相同。所以，目前对桁架式SRC构件的研究很少。不过，与普通钢筋混凝土结构相比，空腹式SRC结构由于配置了钢骨，大大提高了构件的承载力，另一方面，对于实腹式SRC构件，在实际应用中经常遇到无法解决梁与柱交叉穿筋的问题，这时，宜采用空腹式钢骨混凝土。因此，对于空腹式钢骨混凝土的研究仍是很有必要的。在结构设计中，钢骨混凝土柱轴压比的取值不仅对结构的抗性能有很大影响，同时也是确定柱子的截面尺寸、钢骨含量及抗震配筋构造等的重要依据，目前，钢骨混凝土结构设计规程中对轴压比限值的规定和其它有关轴压比的研究主要是针对实腹钢骨的，目前尚无空腹式钢骨混凝土方面的资料可供参考。为了分析空腹式钢骨混凝土的抗震性能，寻找一种即安全又经济的SRC截面形式，本文对9根不同强度、不同配钢率、不同轴力的SRC试件和3根普通RC试件做了抗震性能试验，在保持轴力不变的情况下，采用荷载——变形混合控制方法施加往复的水平荷载，观察其变形性能与破坏状况，测得各试件的滞回曲线。通过观察发现，钢骨混凝土试件的最终破坏状况与钢筋混凝土试件有显著的差异，钢筋混凝土试件的破坏集中在柱上下两端塑性铰区域，而钢骨混凝土试件是柱上下通长破坏，全柱范围混凝土均被压酥。通过对试验结果的分析，认为配置角钢桁架式空腹钢骨的钢骨混凝土柱的抗震能力明显高于钢筋混凝土柱，配钢率和斜腹杆的大小与焊接质量是影响桁架式空腹钢骨的钢骨混凝土柱的主要因素。运用现行混凝土结构设计规范和改进后的简单叠加方法分别计算试件的压弯承载力，通过对比分析，推得了SRC柱的轴力分配，然后在考虑了徐变系数的影响后，对空腹式钢骨混凝土柱轴压比限值提出建议。更多还原

【Abstract】 The Truss Type Steel Reinforced Concrete is a pattern of the Lattice Type Steel Reinforced Concrete. It is regarded that the seismic behavior of the Truss Type SRC is lower than the full-web type SRC members. As a result,the researches on Truss Type SRC members is fewer. Because the Truss SRC members includes steel,the ultimate flexural strength of those is more increased than the Reinforced Concrete (RC) members. On the other hand,it is often that in the application the contradiction of steel between beams and columns can not be solved,the Lattice Type SRC columns is proposed in this case. Therefore,it is necessity to continue to study the Lattice Type SRC. In structure design,the value of axial compression ration of SRC columns has influence not only upon the seismic behavior of structure,but also upon the section dimension,steel requirements and seismic behavior. At present,the definition of the limited values of axial compression ration in the design specification of SRC structure and other research on axial compression ration is focus in the Full-web Type SRC columns. But there is fewer data about Lattice Type SRC members. To analyze the seismic behavior of the Lattice Type SRC members,look for a section patterns which is not only safety but also economic,in this paper,a experiment of seismic behavior about nine Truss Type SRC columns and three RC columns which strength,steel requirements and axial load are different,the deformation capacity and failure patterns are observed,and the hysteretic cycle are obtained. According to the experiment results,it is different between the failure patterns of SRC members and RC members. Based on the analysis of the experiment results,it is regarded that the seismic behavior of the Truss SRC columns is higher than those of RC columns. The steel requirements,the crosswise rod dimension and the welding quantity are the main factor,which influence on the Truss Type SRC columns. Calculating and analyze the compression bending strength according to the method of reinforced concrete structure design code and "the modified simple superposition method",the distribution of axial load is obtained,then,the influence of creep is considered and the formulation of distribution of axial load between reinforced concrete and steel is proposed.and steel is proposed.更多还原