双薄壁墩承台拉压杆模型计算  

Double-thin-wall Pier Base Slab Strut-and-tie Model

作　　者：李强[1] 刘志才[1] 戴少雄[1] 

机构地区：[1]天津市市政工程设计研究院,天津市300051

出　　处：《城市道桥与防洪》2013年第5期81-83,15+14,共3页Urban Roads Bridges & Flood Control

摘　　要：桥梁承台从受力特征上看多属于深梁,即使在弹性阶段承台截面内力分布也不遵循平截面假定。拉压杆模型计算方法充分考虑了承台的受力特性和传力机理,避开了常规材料力学公式对深梁结构不能反映结构材料非线性应变与剪应力不均匀分布的不足。根据以往设计经验,并结合工程实例,提出计算双薄壁墩承台强度计算的新思路。The base slab of bridge mostly belongs to the deep beam from the stress character,even if in the elastic stage,the inner force distribution in the section of base slab is not following the assumption of the plane section.The calculation method of strut-and-tie model fully considers the stress character and force transfer mechanism of base slab,and avoids the shortage of the conventional material mechanics formula not able to reflect the nonlinear strain of structural material and the nonuniform distribution of shear stress.Based on the former design experience and according to the engineering cases,the article puts forward the newconcept of calculating the strength of double-thin-wall pier base slab.

关 键 词：深梁 双薄壁墩承台 拉压杆模型 

分 类 号：U442[建筑科学—桥梁与隧道工程]