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。%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.
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