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针对弦支筒壳结构的特点,采用基于响应面函数的蒙特卡罗法,研究了温度作用下弦支筒壳结构的可靠性能,并对其承载力和变形两种失效模式下的可靠性进行了分析。计算分析表明:温度作用下,索材不同时,尤其是位移失效模式下的可靠度结果差别较大;拉索为钢丝束时的可靠度变化幅度较大,索体为钢拉杆和钢绞线时的可靠度变化幅度较小;拉索为钢丝绳时的可靠度则较其他索材均有所降低。在进行设计时,需要考虑选取不同索材所造成的预应力损失的影响。
Aiming at the characteristics of chord support shell structure, the Monte Carlo method based on response surface function was used to study the reliability of chord support structure under the action of temperature. The reliability under two failure modes of bearing capacity and deformation was studied analysis. The calculation and analysis show that the reliability of the cable varies greatly when the cable is different, especially in the displacement failure mode. The reliability of the cable varies greatly when the cable is towed, and the cable body is the steel rod and strand When the reliability of the smaller change; cable rope reliability when compared with other materials have been reduced. In the design, the need to consider the selection of different materials caused by the impact of prestress loss.