【摘要】 在考虑滞后应变为随机变量的情况下,对二次受力碳纤维布加固混凝土梁发生受压破坏时的抗力进行了统计分析,得到抗力的统计参数和概率分布模型。对常遇荷载组合情况下碳纤维布加固梁的受弯承载力进行了可靠度校准分析,得到其可靠指标满足GB 50068—2001《建筑结构可靠度设计统一标准》推荐的二级结构延性破坏的目标可靠指标要求。在两种荷载组合下,住宅楼在永久荷载与可变荷载组合下的可靠指标较办公楼的可靠指标大,而永久荷载与风载组合下的可靠指标最低。在3种荷载组合下,风载控制时的可靠指标较永久荷载或可变荷载控制时的可靠指标小。更多还原

【Abstract】 The statistical characteristics and probability distribution function of resistance at the crushing failure were obtained for secondary-loading concrete beams strengthened by carbon fiber sheets considering the hysteretic strain as a stochastic variable.Reliability calibration for flexure capability at the common load combination gave the calculated reliability indicator satisfies the required object reliability indicator according to the Unified Standard for Reliability Design of Building Structures GB 50068—2001.The reliability indicator of residential building was higher than that of office building in a combination of dead load and live load,and the lowest in a combination of dead load and wind load,and lower controlled by wind than by dead load or live load in combination with three loads.更多还原