Study on the influence of heavy load at top of absorption towers to dynamic response
Song Bo1,2 Zhang Zunke1,2 Zhu Hongbo1,2 Qin Xiaoyan3
1. University of Science and Technology Beijing, Beijing 100083, China
2. Beijing International Cooperation Base for Science and Technology-Aseismic Research of the Rail Transit Engineering in the Strong Motion Area, Beijing 100083, China
3. Beijing Guodian Longyuan Environmental Engineering Co., Ltd., Beijing 100039, China
Abstract：The absorption tower is a structure with the properties of thin cylindrical shell, large rectangular openings and high-rise. Especially when the WESP is added， the obvious character of top-heavy of the structure leads to buckling failure under earthquake. To perform contrastive analysis of displacement, acceleration and stress response of two absorption towers with WESP, shaking table tests of absorption tower scale model with WESP under different types, different input angle seismic action and different liquid height were conducted . Results show that: the dynamic response of absorption tower without WESP is largest under far-field seismic waves| after installing the WESP, the amplitude increases, natural frequency decreases, and the dynamic response reaches maximum under near-field seismic waves. The stress at the opening jumps, leading to stress concentration phenomenon. Based on the weakening effect of openings on stiffness, the most unfavorable direction of seismic waves is the opening direction. The largest dynamic response of two absorption towers both appear without liquid. With the slurry height increasing, the dynamic response decreases, thus, the slurry absorbs energy and the heavy load weakens the function.
宋波 张尊科 朱宏博 秦晓艳. 地震作用下塔顶重载对吸收塔动力响应影响研究[J]. 土木工程学报, 2016, 49(S2): 96-102.
Song Bo Zhang Zunke Zhu Hongbo Qin Xiaoyan. Study on the influence of heavy load at top of absorption towers to dynamic response. 土木工程学报, 2016, 49(S2): 96-102.
