钢-混凝土组合梁栓钉剪力连接件的研究-结构工程专业论文.docxVIP

摘要剪力连接件是钢一混凝土组合梁中的关键元件，它的性能直接影 摘要 剪力连接件是钢一混凝土组合梁中的关键元件，它的性能直接影 响到钢一混凝土组合梁的承载力和各项性能，而我国目前应用最广泛 的是栓钉连接件，因此对栓钉连接件的研究显得很重要。由于栓钉是 柔性的剪力连接件，相对于刚性连接件来说其承载力较低，抗滑移能 力较差，因此本文将通过对栓钉连接件进行改造得到新的栓钉构造型 式，来改善栓钉连接件的各项性能。 本文通过对不同栓钉构造(将混凝土板中钢筋和栓钉焊接)和不 同栓钉直径的8个推出试件进行的静力试验比较研究，得到了栓钉连 接件的荷载一滑移曲线和栓钉的极限承载力，通过分析比较得到：栓 钉和钢筋焊接的比不焊接的试件其极限承载力要大，而极限滑移量要 小；栓钉直径大的试件比直径小的试件其承载力大，而极限滑移量要 小；同时通过比较发现试验得到的栓钉极限承载力比各种规范的承载 力计算值要偏大。 同时通过对不同栓钉构造的4个推出试件进行了不同荷载幅的 疲劳试验，试验结果表明：栓钉和钢筋焊接的试件其疲劳寿命要长， 且其抗滑移性能要好；荷载幅越大其疲劳寿命越短，滑移量也越大。 本文还利用有限元软件ANSYS对推出试件进行了静力模拟分 析，并和试验数据进行了比较，有限元计算值和试验值吻合比较好。 通过本文的试验和理论研究，发现栓钉和钢筋焊接这种新的栓钉 连接件的抗剪承载能力和抗滑移能力均比传统的栓钉连接件要好，是 一种有发展和应用领域的新型剪力连接件。 关键词栓钉，组合梁，推出试验，横向钢筋，有限元分析 ABSTRACTThe ABSTRACT The shear connector iS the Key components of the steel．concrete composite beams．While the shear stud iS widely used in our country,SO the research of the shear stud iS SO important．The stud iS belong to flexible shear connector whose load-bearing capacity and slip resistance are lowed than the rigid shear connector．This paper will get the new structure style of stud through reforlTl the shear stud to improve the performance of the shear stud． The experimental study of eight push—out specimens of different structure style shear stud(the steel bar and the shear stud are weldedl and diameter of stud have been conducted in this paper,the load—slip curves and ultimate resistance of the shear stud are gained．The conclusions are found：the resistance of the specimens of the stud and steel bar welded iS larger than the specimens of the stud and steel bar nonwelded．while the ultimate slip is lower too；the resistance of specimens of the bigger stud is larger than the lower,while the ultimate slip is lower too；the ultimate resistance of stud through the experiment is larger than the calculated value of di fferent standard． The fatigue test of different load—amplitude study of four different structure style has been conducted in this Paper,the conclusions are found： the fatigue life is long and the performance of the