摘要
以纵肋-顶板疲劳细节为研究对象,结合相关规范,从疲劳应力幅的角度,利用有限元计算方法,分析了某大桥各构造参数对该细节疲劳性能的影响,同时基于纵肋-顶板疲劳细节处疲劳效应,对钢桥面板进行了造价费用优化,并依据价值工程原理,提出了一种可以评价造价费用优化效果的评价方法。分析结果表明,顶板厚度、横隔板间距、纵肋厚度及纵肋上缘宽度,对该细节处的疲劳应力幅均有不同程度的影响,横隔板的厚度的影响基本可以忽略。通过综合考虑,本文建议某大桥顶板厚度、纵肋厚度、纵肋上翼缘宽度、横隔板厚度、横隔板间距最佳设计厚度分别为14mm、6mm、300mm、6mm、4500mm。
In the paper, It analyzed the influence of all structure parameters of one large bridge on the detail fatigue performance from the perspective of fatigue stress amplitude by regarding the longitudinal rib-roof fatigue details as research objects, combining rele- vant specifications and utilizing finite element calculation method, and also optimized the cost of steel panel based on the fatigue effect at longitudinal rib-roof, and put forward a kind of evaluation method for evaluating engineering cost optimization effect according to value project principle. Analysis results indicate that roof thickness, lateral partition spacing, longitudinal rib thickness and longitudi- nal rib upper edge width have different influences on fatigue stress amplitude in the details. Influence of lateral partition thickness basi- cally can be ignored. In the paper, the best design thickness of roof thickness, longitudinal rib thickness, longitudinal rib upper flange width, lateral partition thickness and lateral partition spacing of one large bridge are respectively 14 mm, 6 ram, 300 mm, 6 mm and 4500 mm through comprehensive consideration.
出处
《工程造价管理》
2016年第1期36-40,共5页
Engineering Cost Management
关键词
U肋与顶板
疲劳
费用优化
优化系数
U Rib and Roof
fatigue
Cost Optimization
Optimization Coefficient
