【作者】 刘楠；

【导师】 张有闻；

【作者基本信息】 哈尔滨工业大学 ， 结构工程， 2007， 硕士

【摘要】 机械连接是钢结构的基本连接形式之一。在轻钢结构的应用中,有大量的中、薄厚度钢板(厚度≤6mm)之间的连接。这时采用自攻螺钉连接与传统的螺栓连接相比,有着更为经济,便利、快捷的优点。抗剪连接是最常见的螺钉连接形式。国内、外自50年代便开始对压型钢板间或其与底层支承结构间的连接特性进行试验研究。但由于试验中均以很薄的压型钢板作为一侧或两侧的连接板,加之自攻螺钉的强度很高,因此试验中连接的破坏形式均是压型钢板的承压破坏,自攻螺钉本身的强度却没有发挥出来。由这些试验数据所得到的自攻螺钉连接受剪的承载力计算公式也无法运用到中、薄厚度钢板由自攻螺钉连接的设计中。本文分别对自攻螺钉双面受剪试件与单面受剪试件进行静力试验研究,对其受剪性能与抗剪承载力的设计方法进行了研究,主要内容包括:根据试验需要自行设计了一套安全、实用、准确的加载装置与位移量测装置。参照现已研究的自攻螺钉连接受剪破坏的主要模式,并结合本试验的试验装置,确定了自攻螺钉连接中、薄厚度钢板受剪试件的具体形式与尺寸。进行89个自攻螺钉双面受剪试件与68个自攻螺钉单面受剪试件的静力试验。通过试验,测得自攻螺钉连接受剪破坏时所施加的荷载N以及在该荷载下试件连接处位移δ的数据,并观测记录了试验现象。通过试验现象与试验数据,分析了自攻螺钉连接双面受剪与单面受剪的破坏过程及破坏形式。同时利用试验数据,经过分析回归,得到单个自攻螺钉连接中、薄厚度钢板的抗剪承载力设计值的计算方法,并给出了自攻螺钉受剪连接的相关构造要求与施工要求建议。更多还原

【Abstract】 Mechanical connection is one of basic types of the steel structure connections. Self-Tapping Screw connection is one efficiency type of mechanical connection. In the connections of lightweight steel structures, self-Tapping Screws are widely used due to the advantages of economy, convenience and efficient installing compared with traditional bolt connecting when connecting moderate and thin thickness steel plates, (thickness≤6mm).Self-Tapping Screw connections is a kind of commonly used Shear Connection. Experimental researches on characteristics of connections between profiled steel sheet and other structural elements (including profiled steel sheet, first floor supporting structural element or shear connectors) are extensive proceeded since 1950s. However, of all the tests, the used profiled steel sheet is so thin and the high strength of Self-Tapping Screw that all the failure modes are bearing failure of profiled steel sheet without developing the strength of Self-Tapping Screw. The experimental data can not be used in designing the Self-Tapping Screw connected moderate or thin thickness steel plates. In this dissertation, the shear behavior of single- sided and double-sided Self-tapping Screw is tested; the shear performance and the design method of shear bearing capacity are studied. The main contents include:According to the demands of experiment, a set of safe, practical and accurate loading device and displacement measurement equipment is designed.Referring to the basic failure pattern of the Self-tapping Screw connections and the test equipment of this test, specific form and size of the members which are connected by Self-tapping Screws are determined.Tests on shear resistance behavior of 89 Self-Tapping Screw of double-sided shear members and 68 single-sided ones are carried out. Throughout the test, the applied load N when the Self-tapping Screw connections fails and the displacementδof the Self-tapping Screw connected joint under load N are obtained. Meanwhile the experimental survey and results record are carefully taken.From the test observation and results, the development of shear stress and the failure modes of double-sided and the single-sided Self-Tapping Screw connections under shear stress are analyzed. Experimental data are used to regress a new design method of single Self-Tapping Screw connected moderate and thin thickness steel plates; relevant structure requirements and construction requirements of the Self-tapping Screw connections in shear are suggested.更多还原