摘要
以某火车站站台悬挑雨棚改造工程为背景,由于圆截面雨棚柱偏心受压过大,导致其表面混凝土发生受拉破坏出现了环向裂缝,综合考虑了实际的工程需求,提出了增大柱径及施加预应力的加固措施,并对加固后的预应力雨棚结构,利用有限元软件ANSYS进行了模态和地震响应分析,得到了雨棚结构在地震作用下雨棚板的位移、速度及加速度的时程曲线,为悬挑结构的工程抗震设计提供了参考与借鉴。
This paper is based on the project of cantilevered canopy of a railway station,as the eccentric compression of circular section canopy column is too large,its surface concrete happened tension failure,and appeared circumferential crack. In this paper,considering the actual engineering demand,increase of the column diameter and prestressing reinforcement measures are put forward,and then using the finite element software ANSYS the modal and seismic response of the prestressed canopy structure are analyzed. The time-history curves of the displacement,velocity and acceleration of the canopy structure were obtained under the action of the earthquake,which provided reference for the aseismic design of cantilevered structures.
出处
《低温建筑技术》
2018年第1期74-75,共2页
Low Temperature Architecture Technology
关键词
悬挑雨棚
偏心受压
环向裂缝
预应力加固
地震响应
cantilevered canopy
eccentric compression
circumferential crack
prestressed rein forcement
seismic response
