厦门理工学院学报
廈門理工學院學報
하문리공학원학보
JOURNAL OF XIAMEN UNIVERSITY OF TECHNOLOGY
2014年
5期
78-81
,共4页
杨荣华%焦俊婷%常晓菁%叶国琛
楊榮華%焦俊婷%常曉菁%葉國琛
양영화%초준정%상효정%협국침
钢筋混凝土%连续梁%受弯承载力%可靠性%Monte-Carlo法
鋼觔混凝土%連續樑%受彎承載力%可靠性%Monte-Carlo法
강근혼응토%련속량%수만승재력%가고성%Monte-Carlo법
reinforced concrete%continuous beam%bearing capacity under bending%reliability%Monte-Carlo method
由于钢筋混凝土连续梁的作用荷载、材料、几何特征等具有随机性,使其荷载效应、抗力也具有随机性。针对钢筋混凝土连续梁受弯承载力可靠性,采用Monte-Carlo (蒙特卡洛)法抽样进行计算,定性分析了荷载效应比、材料强度、楼面荷载类型等对钢筋混凝土连续梁受弯承载力可靠度指标的影响。研究结果表明:随荷载效应比增大,连续梁可靠指标减小;随材料强度增加,连续梁的可靠指标变化不明显;楼面活荷载类型对连续梁可靠指标有影响。
由于鋼觔混凝土連續樑的作用荷載、材料、幾何特徵等具有隨機性,使其荷載效應、抗力也具有隨機性。針對鋼觔混凝土連續樑受彎承載力可靠性,採用Monte-Carlo (矇特卡洛)法抽樣進行計算,定性分析瞭荷載效應比、材料彊度、樓麵荷載類型等對鋼觔混凝土連續樑受彎承載力可靠度指標的影響。研究結果錶明:隨荷載效應比增大,連續樑可靠指標減小;隨材料彊度增加,連續樑的可靠指標變化不明顯;樓麵活荷載類型對連續樑可靠指標有影響。
유우강근혼응토련속량적작용하재、재료、궤하특정등구유수궤성,사기하재효응、항력야구유수궤성。침대강근혼응토련속량수만승재력가고성,채용Monte-Carlo (몽특잡락)법추양진행계산,정성분석료하재효응비、재료강도、루면하재류형등대강근혼응토련속량수만승재력가고도지표적영향。연구결과표명:수하재효응비증대,련속량가고지표감소;수재료강도증가,련속량적가고지표변화불명현;루면활하재류형대련속량가고지표유영향。
The load effect and resistance force of reinforced concrete ( RC) continuous beams are random due to the randomness of the RC load, materials and geometric characteristic. The reliability of RC continuous beams under bending moment was calculated by using Monte-Carlo sampling method, and quantitative analysis was made of the impact of load effective ratio, material strength, and live load types on the reliability index of RC continuous beams. The results show that the reliability index decreases with the increase of the load effective ratio, change little with the increase of the materials strength, and varies with different floor live loads.