纵向加劲钢箱梁桥的简化分析

介绍了一种新的流线型薄壁钢箱梁桥。针对该桥大悬臂及大宽跨比的特点进行了试验分析,并进行了数值计算。对于此类复杂结构,选取不同的离散模型对纵向加劲板进行简化模拟,并通过试验验证和全桥模型对所提出的方法的有效性进行判断。虽然全桥模型对于细节和连接部分是不可缺少的分析方法,但是简化分析方法对于确定箱梁结构内力和弯矩仍然保持着一定的有效性。简化分析结果与试验结果保持着较好的一致性,从而验证了其作为预测结构特性的有效性。

Simplifying Analysis of Longitudinal Stiffened Steel Box Beam Bridge

The article introduces a new streamline thin-wall steel box beam bridge.According to the characteristics of long-cantilever and large wide span ratio,the article analyzes the experiment of this bridge,and carries out its numerical value calculation.As for this complicated structure,the different discrete models are selected and used to simplify and simulate the longitudinal stiffened slabs,and estimate the validity of the proposed methods by the experimental validation and the full bridge model.The article points out that the full bridge model is the indispensable analyzing method for the details and the connections,but the simplifying analysis method still keeps some validity for determining the inner force and bending moment of box beam structure.The simplifying analysis result keeps the better consistency with the experimental result so as to verify its validity to forecast the structural characteristics.