高耐久性轻骨料混凝土大跨径桥梁结构设计研究  

Structural Design of Lightweight Aggregate Concrete Long Span Bridge with Durability

作　　者：周欣怡 

机构地区：[1]华设设计集团股份有限公司,江苏南京210014

出　　处：《混凝土世界》2025年第3期75-77,共3页China Concrete

摘　　要：为提高大跨径桥梁结构的抗倾覆稳定性,引入高耐久性轻骨料混凝土材料,开展大跨径桥梁结构设计研究。以某桥梁工程为例,综合运用多种设计方法与技术手段,基于高耐久性轻骨料混凝土的物理力学特性,进行承载能力极限状态设计。针对大跨径桥梁的特点,进行上部装配结构的优化设计,包括现浇连续梁的结构形式、截面尺寸及钢筋配置等。同时,对桥墩与桥台的结构进行详细设计,以提高其支撑能力和稳定性。结果表明:采用高耐久性轻骨料混凝土并结合新设计的桥梁结构方案,显著提高了桥梁结构的抗倾覆稳定系数;相较于传统设计方案,新方案在保证结构安全性的同时,展现了更好的整体稳定性和耐久性,有效提升了桥梁的抗倾覆稳定性和整体安全性,可为相关工程项目的设计提供参考。In order to improve the overturning stability of long-span bridge structure,the durable lightweight aggregate concrete material is introduced to carry out the structural design research of long-span bridge.Taking a bridge project as an example,a variety of design methods and technical means are comprehensively used to design the ultimate state of bearing capacity based on the physical and mechanical properties of durable lightweight aggregate concrete.According to the characteristics of long-span bridges,the optimal design of upper assembly structure is carried out,including the structural form,section size and reinforcement configuration of cast-in-place continuous beams.At the same time,the structure of piers and abutments is designed in detail to improve its supporting capacity and stability.The research results show that the anti overturning stability coefficient of bridge structure is significantly improved by using durable lightweight aggregate concrete combined with the newly designed bridge structure scheme.Compared with the traditional design scheme,the new scheme not only ensures the structural safety,but also shows better overall stability and durability,effectively improves the bridge's anti-overturning stability and overall safety,providing reference for the design of related engineering projects.

关 键 词：耐久性 混凝土桥梁 大跨径 轻骨料 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]