双轴荷载作用下SRC柱抗震性能及正截面受压承载力研究

发布时间：2018-05-11 07:22

本文选题：SRC柱 + 双轴加载　；参考：《西安建筑科技大学》2013年硕士论文

【摘要】：型钢混凝土（SRC）组合结构是目前高层建筑中一种常用的结构体系，，具有承载力高、刚度大及抗震性能好等优点，与传统的钢结构和混凝土结构相比，SRC组合结构表现出了更好的性能优势和发展前景。现阶段国内外主要针对单向水平地震作用进行了研究，对考虑双向水平地震作用耦合影响结构的地震反应和抗震性能，虽然开展了一定研究，但从研究内容的深度和广度上仍处于初级阶段，亟待开展更深入的研究。首先运用有限元软件ABAQUS对已有试验的8根SRC柱进行仿真模拟，目的在于验证有限元软件ABAQUS对单轴低周反复荷载作用下SRC的模拟能力，以及验证建模的有效性，在此基础上进行双轴低周反复荷载作用下SRC柱的有限元模拟，并研究8种常见的双轴加载路径、轴压比、位移幅值循环次数及位移幅值增量等因素对SRC柱的屈服荷载、峰值荷载、位移延性和滞回耗能等抗震性能影响，研究混凝土、型钢及钢筋的屈服和破坏过程、破坏形态，并分析双轴加载路径、轴压比、位移幅值循环次数及位移幅值增量对其破坏形态的影响。通过深入比较国内现有规程双向偏心受压SRC柱的计算方法，得出N-M的关系曲线，研究现有规程中双向偏心受压柱的计算差异。总结前人的研究成果，经过统计分析，提出了一种双向偏心受压柱正截面承载力简化后的实用计算公式。经计算，采用本文所给公式的计算结果与试验结果比值为1.00、均方差为0.02、变异系数为0.14，表明与试验结果吻合较好，并验证了公式的适用范围，发现修正后的公式可以用来计算配I型钢矩形截面双向偏心受压SRC柱的正截面承载力。
[Abstract]:Steel reinforced concrete (SRC) composite structure is a commonly used structural system in high-rise buildings at present. It has the advantages of high bearing capacity, high stiffness and good seismic performance. Compared with the traditional steel structure and concrete structure, the SRC composite structure has better performance advantages and development prospects. At present, the unidirectional horizontal seismic action is mainly studied at home and abroad. Although the seismic response and seismic performance of the structure are affected by the coupling of the two-way horizontal seismic action, although some studies have been carried out. However, the depth and breadth of the research content is still in the primary stage, it is urgent to carry out more in-depth research. At first, eight SRC columns are simulated by finite element software ABAQUS. The purpose of this paper is to verify the simulation ability of ABAQUS to SRC under uniaxial low cyclic loading, and to verify the validity of modeling. On this basis, the finite element simulation of SRC columns under biaxial low cycle cyclic loading is carried out, and the yield loads of eight common biaxial loading paths, axial compression ratios, displacement amplitude cycles and displacement amplitude increments on SRC columns are studied. The effects of peak load, displacement ductility and hysteretic energy dissipation on seismic behavior are studied. The yield and failure process of concrete, section steel and steel bar, the failure form, and the biaxial loading path, axial compression ratio, and so on, are studied. The influence of the number of cycles of displacement amplitude and the increment of displacement amplitude on its failure pattern. By comparing the calculation methods of bidirectional eccentric compression SRC columns with existing rules in China, the relationship curve of N-M is obtained, and the difference of calculation of bidirectional eccentric columns in existing regulations is studied. This paper summarizes the previous research results and puts forward a practical formula for calculating the normal section bearing capacity of biaxial eccentrically compressed columns after statistical analysis. By calculation, the ratio of the calculated results to the test results is 1.00, the mean square deviation is 0.02, and the coefficient of variation is 0.14, which indicates that the formula is in good agreement with the experimental results, and verifies the applicable range of the formula. It is found that the modified formula can be used to calculate the normal section bearing capacity of SRC columns under biaxial eccentric compression with I-section rectangular section.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.9;TU352.11

【参考文献】