广东公路交通
廣東公路交通
엄동공로교통
GUANGDONG HIGHWAY COMMUNICATIONS
2014年
3期
16-20,27
,共6页
混凝土桥梁%中外规范%温度梯度%温度应力
混凝土橋樑%中外規範%溫度梯度%溫度應力
혼응토교량%중외규범%온도제도%온도응력
concrete bridge%chinese and foreign specifications%temperature gradient%temperature stress
介绍中外几种典型的桥梁设计规范中有关混凝土桥梁温度作用的规定与国内实测温度梯度作用模式，并以广东省内数座连续梁实桥为工程背景，对其模式和效应规律进行研究。主要规律为：在同一温度梯度作用下，截面上缘温度自应力与梁高成正比，次应力与梁高成反比，而总温度应力与梁高及跨径关系不大，顶缘温度应力可近似表达为0.29T1（T1：顶缘温度）；截面下缘温度自应力、次应力和总应力与梁高均成反比等。
介紹中外幾種典型的橋樑設計規範中有關混凝土橋樑溫度作用的規定與國內實測溫度梯度作用模式，併以廣東省內數座連續樑實橋為工程揹景，對其模式和效應規律進行研究。主要規律為：在同一溫度梯度作用下，截麵上緣溫度自應力與樑高成正比，次應力與樑高成反比，而總溫度應力與樑高及跨徑關繫不大，頂緣溫度應力可近似錶達為0.29T1（T1：頂緣溫度）；截麵下緣溫度自應力、次應力和總應力與樑高均成反比等。
개소중외궤충전형적교량설계규범중유관혼응토교량온도작용적규정여국내실측온도제도작용모식，병이광동성내수좌련속량실교위공정배경，대기모식화효응규률진행연구。주요규률위：재동일온도제도작용하，절면상연온도자응력여량고성정비，차응력여량고성반비，이총온도응력여량고급과경관계불대，정연온도응력가근사표체위0.29T1（T1：정연온도）；절면하연온도자응력、차응력화총응력여량고균성반비등。
The introduction to the relevant concrete bridge section temperature gradient affection in bridge design of sev-eral typical domestic and foreign specifications and the measured temperature gradient mode in china has been submit, and the comparative analysis research on temperature mode and effect has been carried out on the basis of several con-tinuous girder bridges in Guangdong Province. The results show that:at the same temperature gradient effect,the ther-mal stress of the section on the edge has a trend with the increase of the high beam. Secondary stress has a decreasing tendency with the increase of the beam height,while the total stress basically unchanged,top flange temperature stress can be expressed as 0. 29 T1(T1:top flange temperature);the thermal stress,Secondary stress and total stress of the section on the bottom edge has a decreasing tendency with the increase of the beam height and so on.
