大型输电塔地震动力响应三维有限元分析
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摘要
以旋喷水泥短粗墩基础替代输电塔常见的筏式基础可以简化施工方法、缩短建造周期、节约造价。对旋喷水泥短粗墩基础的输电塔进行地震动力响应分析,地基的边界条件采用透射边界进行处理,采用三维有限元方法建立输电塔的三维整体有限元模型,计算输电塔在地震力作用下的动力响应。同时计算了筏式基础输电塔的地震动力响应。二者结果对比说明,采用旋喷水泥短粗墩基础替代大型输电塔常见的筏式基础是可行的。
In order to decrease the installing period and cost, simplify the building method, the large transmission tower with high-pressure rotary jet grouting base is developed, of which the high-pressure rotary jet grouting foundations replace the raft foundations. In the present study, the seismic response of the large transmission tower with high-pressure rotary jet grouting foundations is investigated. Using the discrete local transmitting boundary, the whole tower′s 3-D finite element modal is established and the seismic response of this tower is calculated. Also, the seismic response of the transmission tower with raft foundations is calculated. The results prove that the present model is feasible for calculating the seismic behavior of the large transmission tower with high-pressure rotary jet grouting foundations.
In order to decrease the installing period and cost, simplify the building method, the large transmission tower with high-pressure rotary jet grouting base is developed, of which the high-pressure rotary jet grouting foundations replace the raft foundations. In the present study, the seismic response of the large transmission tower with high-pressure rotary jet grouting foundations is investigated. Using the discrete local transmitting boundary, the whole tower′s 3-D finite element modal is established and the seismic response of this tower is calculated. Also, the seismic response of the transmission tower with raft foundations is calculated. The results prove that the present model is feasible for calculating the seismic behavior of the large transmission tower with high-pressure rotary jet grouting foundations.
引文
1 LI HONGNAN,WANG QIANXIN,SINGH MP·SEISMIC RESPONSE ANALYSIS METHOD FOR COUPLED SYSTEMOF TRANSMISSION LINES AND TOWERS PART II:IN-PLANE·EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION,1996,16(4):78-87
2 李宏男,王前信·大跨越输电塔体系的动力特性·土木工程学报,1997,30(5):28-36
3 沈冯强·周期分布结构-地基系统在竖向传播地震作用下的透射边界模型·合肥工业大学学报(自然科学版),2000,23(2):173-176
4 SHEN F Q·TRANSMITTING BOUNDARY IN DYNAMIC COMPUTATION.SWANSEA:UNIVERSITY OF WALSE,1988
5 ZIENKIEWICZ O C,BICANIC N,SHEN F Q·EARTHQUAKE INPUT DEFINI-TION AND THE TRANSMITTING BOUNDARY CONDITIONS//DOLTSINIS I ST·AD-VANCES IN COMPUTATIONAL NONLINEAR MECHANICS·NEW YORK:SPRINGER-VERLAG,1989:109-138
2 李宏男,王前信·大跨越输电塔体系的动力特性·土木工程学报,1997,30(5):28-36
3 沈冯强·周期分布结构-地基系统在竖向传播地震作用下的透射边界模型·合肥工业大学学报(自然科学版),2000,23(2):173-176
4 SHEN F Q·TRANSMITTING BOUNDARY IN DYNAMIC COMPUTATION.SWANSEA:UNIVERSITY OF WALSE,1988
5 ZIENKIEWICZ O C,BICANIC N,SHEN F Q·EARTHQUAKE INPUT DEFINI-TION AND THE TRANSMITTING BOUNDARY CONDITIONS//DOLTSINIS I ST·AD-VANCES IN COMPUTATIONAL NONLINEAR MECHANICS·NEW YORK:SPRINGER-VERLAG,1989:109-138
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