钢管混凝土拱桥多振型组合pushover方法可行性例证

发布时间：2017-12-28 02:23

本文关键词：钢管混凝土拱桥多振型组合pushover方法可行性例证　出处：《土木工程学报》2016年01期 　论文类型：期刊论文

【摘要】：提出采用pushover方法估计钢管混凝土(CFT)拱桥的弹塑性地震响应。由于CFT拱桥地震响应受高阶振型影响较大,故pushover方法需要考虑多振型组合。在阐述了多振型组合的pushover方法的过程步骤后以潮白河大桥为例,对比了pushover方法和杆系模型弹塑性时程分析所得的增量动力时程分析(IDA)曲线。对比结果表明:考虑多振型组合pushover方法能合理的得到结构最大响应;所绘制的IDA曲线与弹塑性时程分析所得曲线很接近,可以用于工程实践;就该例而言,多振型组合结果误差比单一振型结果小10%~15%。
[Abstract]:The elastoplastic seismic response of concrete filled steel tube (CFT) arch bridge is estimated by Pushover Method. Because the response is affected by the high modes of seismic CFT arch bridge, so the pushover method takes into account multi modal combination. After describing the process steps of multi-mode Pushover Method, taking the Chao Bai River Bridge as an example, the incremental dynamic time history analysis (IDA) curve obtained by Pushover Method and elastic-plastic time history analysis is compared. The results show that considering multi modal combination pushover method can reasonably get the maximum response of the structure; the drawing of the IDA curve and the elastic-plastic time history analysis of the curve is very close, it can be used in engineering practice; for example, multi modal combination results of error than the single mode results in small 10%~15%.
【作者单位】：哈尔滨工业大学;大连市市政设计研究院有限责任公司;
【基金】：国家自然科学基金(51308157)
【分类号】：U442.55;U448.22
【正文快照】： 引言在桥梁工程中,pushover方法还处在探索和方法适用性验证阶段,主要应用在规则梁式桥的桥墩分析上[1-7]、或者应用在材料弹塑性本构较明确的钢桥上[8-9]。鲜有将pushover方法应用在钢管混凝土(CFT)拱桥上的报道。本文旨在验证考虑多振型组合的pushover方法分析CFT拱桥弹塑性

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