Analysis of influence factors of P-Δ effect considering vertical ground motion

6th Annual International Conference on Material Science and Engineering

Zou, Juan^1 ; Li, Hongjing^1 ; Sun, Guangjun^1

College of Civil Engineering, Nanjing Tech University, Jiangsu Nanjing

211816, China^1

关键词: Analysis of influence factors;    Construction technologies;    Stiffness-to-weight ratios;    Structural acceleration;    Structural response;    Structure optimization;    Vertical accelerations;    Vertical ground motion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/397/1/012033/pdf
DOI  :  10.1088/1757-899X/397/1/012033

来源: IOP

【 摘 要 】

With the development of structure optimization, building materials and construction technology, the study of the P-Δ effect is becoming more and more important in the pursuit of layers, flexibility and light quality. Based on the research status of P-Δ effect at home and abroad, this paper selects thenegative property fictitious member method to calculate the P-Δ effect of the multi-layer frame structure under the combined effect of horizontal and vertical ground motion. This paper discusses the influence of the stiffness-to-weight ratio, structural damping, and the vertical acceleration response of the structure. The results show that the damping and structural acceleration responses have a significant effect on the structural P-Δ effect. Under the premise of considering both, the stiffness-to-weight ratio of the structure, that is, the frequency of the structure, has a greater influence on the P-Δ effect of the structure under earthquakes. With the increase of the stiffness-to-weight ratio, the effect of P-Δ effect on structural response is increased and decreased.