桥梁建设
橋樑建設
교량건설
BRIDGE CONSTRUCTION
2009年
z2期
23-25
,共3页
钢桥%构造%疲劳开裂%疲劳应力截止限%开裂实例
鋼橋%構造%疲勞開裂%疲勞應力截止限%開裂實例
강교%구조%피로개렬%피로응력절지한%개렬실례
steel bridge%structure%fatigue cracking%fatigue stress cutoff limiting%cracking example
给出疲劳应力截止限的概念,并指出只有重复作用的活载应力高于疲劳应力截止限,钢桥构造才可能出现疲劳开裂现象;对149个钢桥构造开裂实例进行分析,分析表明,完善的整体及细节设计和优良的制造质量是避免钢桥构造开裂的关键.
給齣疲勞應力截止限的概唸,併指齣隻有重複作用的活載應力高于疲勞應力截止限,鋼橋構造纔可能齣現疲勞開裂現象;對149箇鋼橋構造開裂實例進行分析,分析錶明,完善的整體及細節設計和優良的製造質量是避免鋼橋構造開裂的關鍵.
급출피로응력절지한적개념,병지출지유중복작용적활재응력고우피로응력절지한,강교구조재가능출현피로개렬현상;대149개강교구조개렬실례진행분석,분석표명,완선적정체급세절설계화우량적제조질량시피면강교구조개렬적관건.
The concept of the fatigue stress cutoff limiting is given and it is pointed out that the fatigue cracking will possibly occur in steel bridge structures only when the live load stress of repeated action is greater than the fatigue stress cutoff limiting. Totally 149 cracking examples of the steel bridge structures are analyzed and the results of the analysis demonstrate that the perfect design of the integrity and details and the good manufacturing quality are critical to the avoidance of the cracking.
