External blast load factors for dome structures based on reliability

作     者：Shao-bo Qi Guang-yan Huang Xu-dong Zhi Feng Fan Richard GJFlay Shao-bo Qi;Guang-yan Huang;Xu-dong Zhi;Feng Fan;Richard G.J.Flay

作者机构：State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081PR China Key Lab of Structure Dynamic Behaviour and Control of the Ministry of EducationHarbin Institute of TechnologyHarbin150090China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of Ministry of Industry and Information TechnologyHarbin Institute of TechnologyHarbin150090China Department of Mechanical EngineeringUniversity of AucklandPrivate Bag 92019Auckland1142New Zealand 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2022年第18卷第2期

页      面：170-182页

核心收录：

学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supports from and Na-tional key research and development program of China(project No.2018YFC0705703) the National Natural Science Foundation of China(project No.51708521,51778183) 

主　　题：Dome structure Airblast variability Deterministic design Assurance factor Reliability-based blast load factor Structural damage levels 

摘      要：Dome structures have been used extensively for industrial,residential,and military ***,it is necessary to understand the damage risk potential for such structures for blast-resistant design *** paper investigates the effect of blast load variability on the design value and the structural dynamic ***,the sources of uncertainty in the external blast load on dome structures were discussed *** based on the probabilistic blast load model for the dome,the rationality of a deterministic mass-increase safety method was *** was found that previous deterministic design method cannot provide a consistent and sound assurance factor or reliability index on the entire dome *** addition,it was also proved that the assurance-based load method fails to ensure compliance with structural safety design standards on the dome roof when compared with the reliability-based blast method.A sensitivity analysis on the probabilistic blast load was conducted,and the results indicate that stand-off distance and explosive mass both act as dominant sources to influence the mean and variability of blast ***,based on the Latin hypercube sampling method,a reliability-based external blast load factor technique was *** technique was further used to estimate structural damage levels of a single-layer reticulated dome under different reliability requirements,associated with a low,medium,and high level of protection grades for a specific explosion scenario,and it indicated that this technique can be useful in the building design to achieve a higher structural anti-explosion *** study herein can serve as a reference for the calculation method of designed blast load.