摘要
雅安至康定高速公路泸定大渡河特大桥在国内外首次采用波形钢腹板组合箱型结构作为高烈度地震区特大跨悬索桥的索塔横梁,采用拟静力模型试验方法对新型索塔横梁体系的抗震性能进行研究。研究成果分为2部分介绍:前文介绍了模型试验设计及其有限元计算分析,本文在前文的基础上,重点分析实测的荷载-位移滞回曲线、骨架曲线、延性性能、刚度退化、耗能能力等试验指标,并对索塔横梁体系的抗震性能进行评估,同时对其塑性铰长度取值进行了初步探讨。试验结果表明:波形钢腹板箱型横梁满足抗震设计要求,索塔横梁联接体系能够实现"强剪弱弯、强节点弱构件"的设计理念,为高烈度地区大跨径悬索桥索塔横向联接抗震设计提供了一种新思路。
For the first time at home and abroad, the corrugated steel webs composite box structure is used as the pylon crossbeam of the extra-long span suspension bridge in high intensity earthquake zone on the Yaan-Kanding Expressway Luding Dadu River Bridge. The pseudo static model test method is used to study the seismic performance of the new cable tower crossbeam system. The research results are divided into two parts： the model test design and finite element analysis are introduced in the former article; based on the previous paper, the load-displacement hysteresis curve, skeleton curve, ductility performance, stiffness degradation, energy dissipation capacity and other test indicators are emphatically analyzed, and the seismic performance of cable tower beam system is evaluated. The value of its plastic hinge length is preliminarily discussed. The test results show that the box beam with corrugated steel webs meets the requirements of seismic design, and the design concept of ＂strong shear, weak bending, strong joint and weak member＂ can be realized in the connection system of cable tower and cross beam, which provides a new idea for seismic design of long-span suspension bridge cable tower transverse connection in high intensity area.
作者
刘少乾
吴涤
唐德强
周道良
LIU Shaoqian;WU Di;TANG Deqiang;ZHOU Daoliang
出处
《公路交通技术》
2018年第5期46-52,共7页
Technology of Highway and Transport
基金
四川藏区高速公路科技攻关项目(2016-04)
关键词
索塔
波形钢腹板横梁
拟静力
抗震性能
高烈度
联接体系
cable tower
crossbeam with corrugated steel web
pseudo static
seismic performance
high intensity
connection system
