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钢桁桥长列高强螺栓群优选布置的有限元分析

, PP. 59-62

Keywords: 桥梁工程,钢桁桥,高强螺栓,摩擦力,应力状态,优选布置

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Abstract:

针对高强螺栓群在钢桁桥中受力性能复杂、优化布置困难的问题,采用有限元软件AN-SYS建立了考虑接触状态的三维有限元实体模型,对4种不同的螺栓布置方式在拉力荷载作用下的板件相对位移、板件应力以及接触面的摩擦应力分布状态等进行了模拟,并对比分析了优选前后螺栓群布置的效果。结果表明优选布置后的螺栓拼接接头应力状态变化不大;采用优选的布置方案可节省螺栓19%~25%。

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