铁路钢盖梁混凝土柱组合门式墩设计研究-《高速铁路技术》

文章信息/Info

Title:: Research on Design of Composite Portal Pier with Steel Capping Beam and Concrete Column of Railway

Author(s):: YU Lang; LUO Yan; 1. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China;
2. Chengdu University of Technology, Chengdu 610059, China

Keywords:: railway bridge|composite portal pier|beam and column constraint|span-height ratio|height-width ratio|corner structure|pier column connection structure

摘要:: 本文以某铁路组合门式墩为依托工程，比选不同梁柱约束体系对其力学行为的影响，确定最优方案。根据梁柱两端固结组合门式墩的结构特点，采用空间杆系有限元分析方法，对其盖梁跨高比、墩柱高宽比及关键部位进行了研究。研究结果表明：梁柱两端固结的约束体系刚度大，用钢量较省，铁路尤其是高速铁路应优先采用；梁柱两端固结组合门式墩的钢盖梁最大挠度随跨高比的减小而减小，并逐步趋于稳定；位于非地震区时，梁柱两端固结组合门式墩高宽比宜大于3且应取高值，位于地震区时，高宽比宜在3~5之间且应取低值；角隅构造应优先采用底板左右断开的处理方式；墩柱连接构造推荐采用锚栓式连接构造。

Abstract:: Based on a railway composite portal pier, this paper compares the influence of different beam and column constraint systems on their mechanical behaviors and determines the optimal scheme. According to the structural characteristics of composite portal pier with both ends of beam and column consolidated, the span-height ratio of its capping beam, the height-width ratio of its pier column and the key parts are studied by using the finite element analysis method with spatial member system. The results show that the restraint system consolidated at both ends of beam and column has high stiffness and less steel consumption, and it should be preferred in railways, especially high-speed railways. The maximum deflection of steel capping beam of composite portal pier consolidated at both ends of beam and column decreases with the decrease of span-height ratio, and gradually tends to be stable. The height-width ratio of the composite portal pier consolidated at both ends of beam and column should be greater than 3 in non-seismic area and higher value shall be taken, while the height-width ratio should be between 3 and 5 in seismic area and lower value shall be taken. Splitting the bottom plate into left and right halves shall be the preferred treatment method for corner structure. Anchor bolt connection structure is recommended for pier column connection structure.