CAJ | 학술논문

通过数值模拟的方式分析了高耸通信塔在强震作用下的动力特点,根据平台和信号器设置的数量,在塔顶施加等效荷载来模拟通信设备及平台自重的影响.结果表明,避雷针与塔身连接位置主要以拉应力为主,容易断裂.配重下的塔体应力延时程变化略大于无配重结果,而最大水平位移因重力二阶效应要远大于无配重结果.配重区域位移应力都较大,是主塔的薄弱环节.在抗震分析时,应更好地选择附带配重的铁塔作为计算依据是保证结构安全的重要条件.
통과수치모의적방식분석료고용통신탑재강진작용하적동력특점,근거평태화신호기설치적수량,재탑정시가등효하재래모의통신설비급평태자중적영향.결과표명,피뢰침여탑신련접위치주요이랍응력위주,용역단렬.배중하적탑체응력연시정변화략대우무배중결과,이최대수평위이인중력이계효응요원대우무배중결과.배중구역위이응력도교대,시주탑적박약배절.재항진분석시,응경호지선택부대배중적철탑작위계산의거시보증결구안전적중요조건.
The seismic response characteristic of communication tower is analyzed by numerical simulation. The influence of the communication equipment and platform dead-weight was simulated by imposing the equivalent load on the tower top ac-cording to the platform and annunciator quantity. The numerical simulation results show that the tensile stress is the main force at the junction of lightning rod and tower and this position is easily ruptured,the stress delay of the tower with counterweight is slightly larger than that with no counterweight,and the maximum horizontal displacement are larger due to the gravity second-or-der effect. The communication tower weak link is located at the counterweight area,that means the counterweight of the tower should be chosen carefully as the computed basis in the seismic analysis to ensure the construe safety.