惠肇东江特大桥主桥设计关键技术
KEY TECHNOLOGIES IN THE DESIGN OF THE HUIZHOU-ZHAOQING DONGJIANG GRAND BRIDGE
李保磊 1邹建波2
作者信息
- 1. 江苏高速公路工程养护技术有限公司,南京 211106
- 2. 华设设计集团股份有限公司,南京 210014
- 折叠
摘要
为探究复杂建设环境下的特殊斜拉桥结构受力特性,解决设计难题.文中以东江特大桥为工程背景,通过边跨密索区梁段的特殊设计与全桥施工模拟分析,实现无辅助墩不对称全悬臂施工设计,有效保护了水源保护区和降低了水中高支架施工的风险.对比规范等效静力计算和数值动力模拟分析结果,验证了数值模拟的可靠性,得到防撞力和结构损伤情况,为结构设计提供依据.基于塔柱拉索锚固区精细化仿真分析结果,得到了锚固区受力分布特点,加强了结构设计.研究为同类建设环境下的工程设计提供参考.
Abstract
To explore the stress characteristics of special cable-stayed bridge structures in complex construction environments and address design challenges,this study uses the dongjiang grand bridge as a case study.By imple-menting a special design for the edge span's dense cable segment and simulating the entire bridge construction,an asymmetrical cantilever construction design without auxiliary piers was achieved.This effectively protected the wa-ter source protection area and reduced the risks associated with high support construction in water.The study com-pares the results of code-compliant equivalent static calculations with numerical dynamic simulations to verify the reliability of the numerical model.Insights into impact forces and structural damage were obtained,providing a ba-sis for structural design.Based on refined simulation analysis results of the anchorage area of the tower-column ca-ble,the stress distribution characteristics in the anchorage area were determined,leading to targeted enhancements in structural design.This research provides valuable references for engineering design in similar construction envi-ronments.
关键词
混凝土斜拉桥/全悬臂施工/墩柱防撞设计/塔柱拉索锚固Key words
concrete cable-stayed bridge/cantilever construction/pier protection design/tower-column cable an-chorage引用本文复制引用
出版年
2024
NETL
NSTL
万方数据