CAJ | 학술논문

为分析带下部支承结构的 Kiewitt -6型单层球面网壳在冲击荷载下动力响应，在 ANSYS /LS -DYNA 中建立钢管柱支承的单层球面网壳数值分析模型，据冲击响应特点，总结四种响应模式，研究冲击能量、冲击位置、环梁刚度对上部网壳动力响应影响。进行钢管柱支承的单层球壳模型冲击试验，测量、分析结构的动应力、动位移及加速度，研究冲击柱破坏模式。结果表明，四种响应模式以冲击柱破坏模式（轻微损伤、局部凹陷、压弯破坏、剪切破坏）为典型特征；除响应模式4，网壳动力响应随冲击能量增大而增大；柱中为最不利冲击位置；环梁刚度增大，网壳动力响应减小；有限元分析结果与实测结果吻合较好，验证数值计算方法的正确性。
위분석대하부지승결구적 Kiewitt -6형단층구면망각재충격하재하동력향응，재 ANSYS /LS -DYNA 중건립강관주지승적단층구면망각수치분석모형，거충격향응특점，총결사충향응모식，연구충격능량、충격위치、배량강도대상부망각동력향응영향。진행강관주지승적단층구각모형충격시험，측량、분석결구적동응력、동위이급가속도，연구충격주파배모식。결과표명，사충향응모식이충격주파배모식（경미손상、국부요함、압만파배、전절파배）위전형특정；제향응모식4，망각동력향응수충격능량증대이증대；주중위최불리충격위치；배량강도증대，망각동력향응감소；유한원분석결과여실측결과문합교호，험증수치계산방법적정학성。
In order to analyze the dynamic response mode of Kiewitt-6 single-layer reticulated shell with substructure under impact,a model of shell with steel pipe column for numerical analysis was established by using the ANSYS /LS-DYNA program.Four dynamic response modes were put forward according to the features of dynamic responses.The influences of the impact energy,impact location,and stiffness of ring beams were studied.The impact test on the single-layer reticulated shell model with steel pipe columns was conducted.The dynamic stress,dynamic displacement and acceleration were measured and analyzed,and the damage patterns of impacted columns were studied. The results show that response modes are typically characterized by the damage patterns of impacted columns (slight damage,local dent,press-bend failure and shear failure).The dynamic response of the reticulated shell increases with the increase of impact energy with the exception of the response mode 4.The most unfavorable impact position is the central part of columns.The dynamic response of reticulated shell decreases with the increase of stiffness of ring beams.The numerical model was also proved to be reasonable by comparing the theoretical and experimental results.