【摘要】 施工期钢筋混凝土结构的安全问题越来越受到关注。钢筋混凝土结构施工过程中的安全分析 ,应建立在准确把握时变结构的荷载、荷载效应和抗力以及合理计算安全指标的基础之上。本文结合调查统计 ,研究和讨论了钢筋混凝土结构在施工过程中抗力、荷载及荷载效应的特征和概率模型 ,基于建筑结构可靠性理论进行安全分析 ,建立了考虑荷载重新分配的施工期结构安全指标的计算方法。通过对一批案例的分析和计算 ,讨论了结构设计因素、施工周期、施工活荷载以及支模层数等对安全指标的影响。本文的结论和提出的方法可以用于钢筋混凝土结构施工过程的安全控制、施工方案的比选、优化和决策。更多还原

【Abstract】 The structural safety of reinforced concrete structures during construction is studied based on the understanding of the load distribution,the load effects,the resistance,and the calculation of safety index.A method to calculate the safety index is proposed in the paper, based on the structural reliability theory.The influences of the structural design issues,the construction cycle,the construction load,and the levels of shoring floors on the safety index are discussed through several construction cases.The proposed method can be used for the safety control and the comparison of construction scheme of a reinforced concrete structure during construction.更多还原