考虑不同桩长影响的变电站配电楼地震反应分析

引用文献:

李明富 ,王亚敏, 王朔 ,张海清. 考虑不同桩长影响的变电站配电楼地震反应分析[J]. 建筑结构,2022,48(23):139-146.

LI Mingfu ,WANG Yamin ,WANG Shuo ,ZHANG Haiqing. Seismic response analysison substation distribution building considering influence of different pile length[J]. Building Structure,2022,48(23):139-146.

作者:李明富 ,王亚敏, 王朔 ,张海清
单位:国网河北省电力有限公司经济技术研究院 河北大学建筑工程学院
摘要:从变电站桩基-筏板-配电楼结构耦合体系出发,采用PLAXIS 3D建立桩筏基础-地基-上部结构三维有限元整体模型,其中,土体非线性力学行为采用考虑小应变特性的双曲线型弹塑性(HSS)模型模拟,动力计算中采用自由场边界(模型四周)和柔性底部边界(模型底部)来模拟无限地基。通过整体模型动力时程分析,研究了3条典型地震波及其不同加速度峰值情况下长桩和短桩设计方案对应的上部结构及桩筏基础动力响应特性。结果表明:变电站配电楼虽然层数较低,在地震作用下楼顶仍然表现出一定的放大效应;考虑结构后的地表水平加速度峰值总体上高于自由场地的情况,距结构30m范围内地表水平加速度反应相对较大;桩长在一定范围内变化对上部结构的振动响应影响不大;上部结构的水平加速度峰值随输入地震动加速度峰值增加而增大,地下室底板中部弯矩极值对地震动加速度峰值及不同地震波波形均不敏感。
关键词:变电站;配电楼;地震反应;桩筏基础-地基-上部结构;地震强度;HSS模型;
作者简介:李明富,学士,高级工程师,主要从事变电站土建设计,Email:147801540@qq.com。
基金:国网河北省电力有限公司科技项目资助“基于数值模拟的变电站软弱地基分析技术研究”(B704JY200081)。
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参考文献[1] 朱瑞民,李东亮,齐立忠,等.变电站地震灾害分析与抗震设计[J].电力建设,2013,34(4):14-18.
[2] 程永锋,朱全军,卢智成.变电站电力设施抗震措施研究现状与发展趋势[J].电网技术,2008,32(22):84-89.
[3] 刘建秋,王亚超,韩文庆.变电站震害分析与抗震措施的研究综述[J].电力建设,2011,32(7):44-50.
[4] 孙路,林均岐,刘金龙,等.基于电气设备震害评定地震烈度的研究[J].自然灾害学报,2015,24(3):46-51.
[5] 谢强,李杰.电力系统自然灾害的现状与对策[J].自然灾害学报,2006,15(4):126-131.
[6] 刘如山,张美晶,邬玉斌,等.汶川地震四川电网震害及功能失效研究[J].应用基础与工程科学学报,2010,18(S1):200-211.
[7] 韩超,丁志锋,王越,等.长持时强震对电力基础设施的致灾影响[J].自然灾害学报,2018,27(6):83-90.
[8] 夏坤,李小东,张令心.土与结构相互作用效应的中外抗震规范对比[J].世界地震工程,2016,32(1):81-88.
[9] 干洪,张金轮,许小健.软土地基上考虑共同作用的地震反应谱分析研究[J].安徽建筑工业学院学报(自然科学版),2011,19(1):1-6.
[10] 刘立平,谭明子,李英民,等.基于SSI效应的结构抗震设计方法的中美规范对比[J].土木工程学报,2014,47(S1):253-256.
[11] 范重,刘涛,陈巍,等.基础刚度对高层建筑抗震性能影响研究[J].工程力学,2017,34(7):203-213.
[12] 王海东,常广乐,盛旺成.近场水平、竖向地震共同作用下地基-基础-RC框架结构抗震性能研究[J].地震工程与工程振动,2017,37(1):192-198.
[13] 黄大明,王敏.桩径对桩-土-结构共同作用时的抗震性能的影响[J].建筑结构,2008,38(9):89-91,88.
[14] 周春霖,陆浩亮,朱合华.桩土共同作用下桩长对结构抗震性能影响分析[J].华北地震科学,2009,27(3):7-11.
[15] 贺雅敏,杨锋.地基-基础-结构共同作用抗震分析综述[J].工业建筑,2006,36(S1):633-636.
[16] 杨军,杨敏,罗如平.软土地基刚性桩复合地基动力离心模型试验[J].地下空间与工程学报,2019,15(2):381-386,401.
[17] 文波,张路,牛荻涛,等.考虑主子结构动力相互作用的变电站抗震性能分析[J].振动与冲击,2019,38(16):166-173.
[18] 韩小雷,肖成安,英峻豪.地震作用下复合地基-筏板-上部结构相互作用体系的动力弹塑性分析[J].岩土力学,2013,34(3):762-768.
[19] 尹训强,邱义波,王桂萱.复杂非均质场地条件下考虑桩-土相互作用的核电厂取水构筑物抗震安全分析[J].工程抗震与加固改造,2020,42(5):86-93,105.
[20] 罗川,占昌宝,楼云锋,等.地震激励下桩-土非线性耦合作用对桩基动力响应特性的影响[J].振动与冲击,2017,36(3):20-26.
[21] 杜鹏,白宗琨,蒋世林,等.高烈度区超高层剪力墙结构桩基性能设计探讨[J].建筑结构,2019,49(10):94-97,102.
[22] BRINKGREVE R B J,KUMARSWAMY S,SWOLFS W M,et al.PLAXIS connect edition V20 manual[M].Netherlands:Plaxis bv,Bentley Systems,2020.
[23] 丰土根,杜冰,花剑岚,等.500kV地下变电站基坑围护结构抗震影响因素[J].解放军理工大学学报(自然科学版),2010,11(4):451-456.
[24] 梁发云,贾亚杰,丁钰津,等.上海地区软土HSS模型参数的试验研究[J].岩土工程学报,2017,39(2):269-278.
[25] 刘志祥,张海清.PLAXIS高级应用教程[M].北京:机械工业出版社,2015.
Seismic response analysison substation distribution building considering influence of different pile length
LI Mingfu ,WANG Yamin ,WANG Shuo ,ZHANG Haiqing
(Economic and Technological Research Institute, State Grid Hebei Electric Power Co., Ltd. College of Civil Engineering and Architecture, Hebei University)
Abstract: Starting from the coupling system of pile foundation-raft-distribution building structure of a substation, the three-dimensional finite element model of pile raft foundation-ground-superstructure was established by using PLAXIS 3 D. The nonlinear mechanical behavior of soil was simulated by hyperbolic elastic-plastic(HSS) model considering small strain characteristics. The free field boundary(around the model) and compliant base boundary(bottom of the model) were used to simulate the infinite ground. Through the dynamic time history analysis of the overall model, the dynamic response characteristics of the super structure supported by long or short piles under three typical seismic waves with different peak accelerations were studied. The results show that although the number of floors of substation distribution building is low, the roof still shows a certain amplification effect under the action of earthquake. The peak value of surface horizontal acceleration after considering the structure is generally higher than that of free site, and the horizontal acceleration response of surface within 30 m from the structure is relatively large. The change of pile length in a certain range has little effect on the vibration response of superstructure. The peak value of the horizontal acceleration of the superstructure increases with the increase of the peak ground acceleration, and the extreme value of bending moment in the middle of the basement floor is not sensitive to the peak ground acceleration and different waveforms.
Keywords: substation; distribution building; seismic response; pile raft foundation-ground-superstructure; earthquake intensity; HSS model
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