桥梁结构耐久性设计方法研究  

Research on Durability Design Method of Bridge Structure

作　　者：郭鹏 GUO Peng(Fujian West Coast Architecture Design Institute Co.,Ltd.,Fuzhou 350001,Fujian,China)

机构地区：[1]福建西海岸建筑设计院有限公司,福建福州350001

出　　处：《工程技术研究》2024年第17期173-175,共3页Engineering and Technological Research

摘　　要：随着社会和经济的不断发展,桥梁建设行业规模不断扩大,但由于结构设计对细节不够重视,桥梁混凝土的寿命无法得到充分保证,对桥梁使用和运输安全产生了很大的不利影响。文章通过分析福建省海滨地区某桥梁,提出有效提高桥梁结构耐久性的方法,以最大限度地提高桥梁结构的稳定性和安全性。研究结果表明,当压力为5 MPa时,试样微裂缝的压应力降低了混凝土各层中的氯离子含量,从而降低了混凝土氯离子的迁移系数;当压应力为10 MPa时,试验内部基体的微裂缝扩大,氯离子迁移系数相对于压力为5 MPa时有所提高。With the continuous development of society and economy,the scale of bridge construction industry continues to expand.However,due to the lack of attention to details in structural design,the life of bridge concrete can not be fully guaranteed,which has a great adverse influence on the safety of bridge use and transportation.By analyzing a bridge in the coastal area of Fujian Province,this paper puts forward a method to effectively improve the durability of the bridge structure,so as to maximize the stability and safety of the bridge structure.The results show that when the pressure is 5 MPa,the compressive stress of the micro-crack of the sample reduces the chloride ion content in each layer of the concrete,thus reducing the migration coefficient of the chloride ion in the concrete;when the compressive stress is 10 MPa,the micro-crack of the matrix inside the test expands,and the chloride ion migration coefficient is higher than that when the pressure is 5 MPa.

关 键 词：混凝土桥梁 结构耐久性 氯离子浓度 迁移系数 

分 类 号：U448.14[建筑科学—桥梁与隧道工程]