摘要
基于同时考虑墩顶主梁弯曲约束和结构体系抗推约束等效刚度,推导出刚构墩在双重弹性约束下的压杆计算长度系数精确方法,并编制出相应的计算程序。结合算例比较计入主梁弯曲刚度和水平抗推刚度以及墩顶固结、墩顶受弯曲约束但水平可移动铰等不同边界状态对高墩计算长度系数的影响,并研究不同边界条件下刚构高墩截面的配筋需求。结果表明:精细化确定刚构墩计算长度是影响桥墩构造及配筋设计的关键因素。
This paper,based on the consideration of the bending stiffness of the main girder of the pier and the anti-thrust constraint equivalent stiffness of the structural system,derived the precise method of calculating the length coefficient of the compression bar under the double elastic restraint for the rigid piers,and the corresponding calculation program is prepared.The effects of different boundary conditions on the calculation of the length of the piers are studied by comparing the bending stiffness and the horizontal thrust stiffness of the main girder and the consolidated pier top and pier top restraint by bending but the hinge may move horizontally,so to study reinforcement requirement at the section of rigid high piers under different boundary conditions.The results show that the precise determination of calculated length of the rigid piers is the key factor affecting the design of the pier and the reinforcement design.
出处
《公路交通技术》
2017年第5期53-57,共5页
Technology of Highway and Transport
关键词
弯曲约束
刚构墩
配筋需求
计算长度
Bending restraint
rigid pier
reinforcement requirement
calculated length
