随机荷载下大跨度单层球面网壳动力可靠度研究  

Study on dynamic reliability of large-span single-layer spherical shells under random loads

作　　者：柳春光[1,2] 李会军[2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116024 [2]大连理工大学建设工程学部,大连116024

出　　处：《建筑结构》2010年第7期115-118,共4页Building Structure

基　　金：国家自然科学基金资助项目(59908013)

摘　　要：提出了计算大跨度空间网格结构动力可靠度的一种新算法。以随机振动的首次超越为破坏准则,依据随机变量功能函数模式建立随机结构动力可靠度的功能函数;引入响应面法,对功能函数进行拟合;对Nataf进行线性化变换,并将该变换与iHLRF算法结合,实现了基于线性化Nataf变换和iHLRF算法的可靠度计算方法。将该法应用于大跨度空间网格结构的动力可靠度计算中,结果表明此算法具有良好的计算精度和效率,且计算过程简单实用。A new algorithm is proposed to compute dynamic reliability of large-span spatial latticed structures.Based on first excursion failure criterion of random vibration,the performance function of dynamic reliability was established according to performance function mode of random variables.Sequential surface response method was used to fit the performance function.Linearized Nataf transformation had been put forward and was integrated with iHLRF algorithm.A new reliability method based on the linearized Nataf transformation and iHLRF algorithm was proposed.The proposed algorithm to compute dynamic reliability in long-span spatial reticulated steel structures was introduced,and the results show that the method has high accuracy and efficiency,and computation process is simple and practical.

关 键 词：动力可靠度 响应面法 首次超越破坏准则 线性Nataf变换 iHLRF算法 

分 类 号：TU311.13[建筑科学—结构工程]