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关于高强螺栓摩擦型连接和承压型连接区别的探讨 总被引:1,自引:0,他引:1
从高强螺栓摩擦型连接和承压型连接的极限状态着手,通过对两种连接的计算方法和使用及构造要求的具体分析,全面探讨了高强螺栓两种连接的区别,为工程中高强螺栓的设计和使用提供参考。 相似文献
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本文简单介绍了大六角头高强度螺栓在钢结构住宅中的应用,重点分析了螺栓受力情况和安装工艺及检验方法,并提出了计算公式。 相似文献
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介绍了两起螺栓联接失效事件的现场实测数据,指出螺栓联接的预紧力不当是造成该类联接失效的主要原因,预紧力过大和不足都可导致螺栓变形和断裂。 相似文献
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通过对连接螺栓预紧力的分析,讨论了载荷、环境温度对高强度螺栓的影响,确定了高强度螺栓连接预紧力许用上限值分析,优化了安装方案,提高了螺栓的强度,为今后现场复核高强度连接螺栓的预紧力是否为最佳状态提供了理论依据。 相似文献
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除焊接、铆接和六角头(普通)螺栓连接以外,高强度螺栓连接也是钢结构的另一种重要连接方式。高强度螺栓有8.8S级、10.9S级和12.9S级三种。我国目前使用的高强度大六角头螺栓只有8.8S级和10.9S级两种,扭剪型高强度螺栓只有10.9S级一种。该文对高强度螺栓及其连接作了比较,并提出了注意事项。 相似文献
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超早强混凝土的研制经历了从单一早强剂到复合早强剂、再由复合早强剂与高强快硬水泥相结合的发展阶段.高效减水泵送剂、复合早强剂、高强快硬水泥配制的超强早强C30混凝土,24h能达到近20MPa的强度,以达到精轧机尽快投产的效果. 相似文献
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Strength of Glued-In Bolts after Full-Scale Loading 总被引:2,自引:0,他引:2
M. Uhre Pedersen C. O. Clorius L. Damkilde P. Hoffmeyer 《Canadian Metallurgical Quarterly》1999,13(3):107-113
In 1993 after 9 years of use, one of the wooden blades of a windmill was struck by lightning. After demounting, the damaged blade was handed over to the Technical University of Denmark, Lyngby, for the investigation of potential fatigue damage. This paper presents an experimental determination of the residual strength of the glued-in bolts that served as the blade to rotor hub connection in the windmill. The load history of the bolts, the test method, the observed fracture modes, and the force displacement curves are presented along with the recorded residual strength of the bolts. The bolts with a length of 500 mm had a special hollow tapering giving them a higher load-bearing capacity than solid bolts of equal dimensions. An FEM analysis confirms the higher load-bearing capacity. The mean residual stength was found to be 362 kN with a standard deviation of 37 kN, which is 95% of the predicted strength based on short-term tests on similar bolts. At fracture, a displacement between 0.4 and 1.0 mm was observed. In the majority of failures, the bolts were pulled out like a cork from a bottle. 相似文献
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文章主要介绍钢结构工程地脚螺栓预埋的几种形式。重点阐述地脚螺栓预埋的施工方法,从而有效保证预埋螺栓的位置、标高的准确性。 相似文献