摘要
针对某抽水泵站进水池塔墩体系结构动力响应特性开展计算分析,研究了塔墩体系结构自振特性,自振频率随计算阶次增长幅度逐渐放缓,各计算阶次下振型为“X向主导-Y向主导、三向联动-X、Y向组合振动”变化。研究了结构体系中受拉严重部位为塔墩横、纵梁、栅墩,压应力均满足材料允许应力要求;正向最大位移均位于栅墩处,X向最大位移为17.1 mm。获得了纵梁、栅墩拉应力、胸墙第一主应力均与切角高度为负相关关系,切角高度增大,抑制结构受拉趋势愈显著;压应力受切角高度变化影响较小,纵梁压应力均在7.3~7.4 MPa。获得栅墩X、Y向位移不受切角高度变化影响,Z向位移在切角高度0.6 m时最小。增设切角高度0.6 m时横梁、纵梁、栅墩拉应力最大值分别降低了43.4%、5.6%、61.8%,位移值亦有降低,该设计方案结构体系抗震性能较佳。
Based on the calculation and analysis of dynamic response characteristics of the tower pier system structure in a pumping station,the self-vibration characteristics of the tower pier system structure are studied.The change is“X-direction-Y-direction,three-way linkage-X,Y-direction combined vibration”.The severe tensile parts in the structural system were studied as tower pier transverse,longitudinal beam and pier,and the compressive stress met the material allowable stress requirements;the maximum positive displacement was located at the pier,and the maximum X displacement was 17.1mm.The longitudinal beam,pier tensile stress,and the first principal stress of the breast wall are all negatively correlated with the height of the cut angle.The height of the cut angle increases,and the tensile strength of the restraining structure is more significant.The longitudinal beam compressive stress is 7.3~7.4MPa.It is obtained that the displacement of the pier in X and Y directions is not affected by the change of the cutting angle height,and the Z displacement is the smallest when the cutting angle height is 0.6m.The maximum tensile stress of beams,longitudinal beams and pier is reduced by 43.4%,5.6%and 61.8%respectively when the cutting angle height is increased by 0.6m,and the displacement value is also reduced.The research indicates that the design scheme has better seismic performance.
作者
叶柏阳
孙益松
周松松
YE Baiyang;SUN Yisong;ZHOU Songsong(Jiangsu Huaiyuan Engineering Construction Supervision Co., Ltd., Huai'an 223005, Jiangsu;Huai'an Water Conservancy Survey and Design Institute Co., Ltd., Huai'an 223005, Jiangsu)
出处
《广东水利水电》
2020年第8期54-60,共7页
Guangdong Water Resources and Hydropower
关键词
反应谱
进水池
塔墩体系
动力特性
仿真计算
response spectrum
inlet tank
tower pier system
dynamic characteristics
simulation calculation
