摘要
针对公路桥梁中周期性可变荷载的特点,依据现行《公路桥涵设计通用规范》(JTG D62-2004)给出公路桥梁钢结构疲劳应力幅的计算方法.按构造重要性和可替换性的差异,根据全寿命设计思想,在铁道部科学研究院长期大量试验的基础上,提出将容许应力幅的保证率作为变量的疲劳抗力方程,达到设计时综合考虑施工及桥梁服役整个寿命期的目的.以一座公路悬索桥钢混叠合加劲梁疲劳计算作为算例,通过与其它规范方法的比较,证明本方法的可靠性.
Aiming at features of cyclical loads in highway bridges,a method for calculation of fatigue stress amplitude design was put forward in accordance with General Code for Design of Highway Bridges and Culverts(JTG D62-2004).Based on "whole life design",combined with the experiments done by railway institute for a long time,it brought forward variable assurance ratio in fatigue equations,so that different assurance ratio can be used according to the difference of structure replaceable and significance.Through a...
出处
《郑州大学学报（工学版）》
CAS
2007年第3期33-36,共4页
Journal of Zhengzhou University（Engineering Science）
基金
国家西部交通建设科技项目(200538181215)
关键词
钢结构
钢混叠合梁
疲劳抗力
全寿命设计
steel structure
concrete-steel Beam
fatigue resistance
whole life design
