预制节段拼装桥墩塑性铰性能

doi:10.6040/j.issn.1672-3961.0.2024.265

摘要/Abstract

摘要： 基于“等同现浇”设计原则,系统探究2种不同连接方式的预制节段拼装桥墩塑性铰性能。以4个预制拼装桥墩的试验研究为基础,搜集汇总国内外共66个矩形或方形截面混凝土墩柱试验数据,分析墩柱高度、加载方向截面高度、材料特性、配筋率和轴压比对塑性铰长度的影响,并对现有塑性铰长度公式进行评估,提出适用于预制节段拼装桥墩的塑性铰长度计算公式,并采用解析法验证了其可行性。结果表明,塑性铰长度随着墩柱高度、加载方向截面高度、纵筋屈服强度、纵筋直径和配筋率的增大而增长,随着轴压比的增大而减小。本研究提出的公式适用于计算预制节段拼装桥墩的塑性铰长度。

关键词: 预制节段拼装桥墩, 新型连接, 塑性铰长度, 变形能力, 拟静力试验

Abstract: In order to investigate the plastic hinge performance of precast segmental piers with two different connection methods based on the "cast-in-place" principle, a total of 66 concrete piers with rectangular or square cross-sections at home and abroad were collected and assembled based on the experimental studies of four precast piers. The effects of pier height, section height in the loading direction, material properties, reinforcement ratio, and axial compression ratio on the plastic hinge length were analyzed and the existing plastic hinge length formulae were evaluated. The formula of plastic hinge length suitable for precast segmental assembled piers was proposed, and its feasibility was verified by analytical method. The results indicated that the plastic hinge length increases with the increase of the pier height, section height, yield strength, and diameter of longitudinal bars and reinforcement ratio, and decreases with the increase of the axial compression ratio; and the formula proposed in this paper was suitable for the calculation of the plastic hinge length of precast segmental assembled pier.

Key words: prefabricated segmental assembled piers, new connection, plastic hinge length, deformation capacity, pseudo-static test

中图分类号:

TU375

谢裕鹏,熊二刚,李思锋,刘丰玮,王尚. 预制节段拼装桥墩塑性铰性能[J]. 山东大学学报 (工学版), 2025, 55(6): 129-141.

XIE Yupeng, XIONG Ergang, LI Sifeng, LIU Fengwei, WANG Shang. Plastic hinge length study of prefabricated segmental assembled bridge piers[J]. Journal of Shandong University(Engineering Science), 2025, 55(6): 129-141.

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