模拟爆炸地震波及其对框架结构的影响
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摘要
基于能够描述爆炸地震波的非平稳随机过程模型进行爆炸地震波的模拟研究,给出能够考虑装药量和爆心距影响的单点爆炸地震波实用模拟方法。以15层框架结构为例,运用有限元分析软件建立空间板梁结构的有限元模型,计算结构的固有频率和固有振型,分析高层框架结构在模拟爆炸地震波作用下的动力响应。根据结构动力响应结果,判断结构的薄弱层,为工程抗震设计提供参考依据。
Explosion seismic waves were numerically studied with a non-stationary random process model.A practical simulating method of single-pointexplosion seismic waves was presented,in which the effects of distance and mass of explosive were put into consideration.Based on the case of a 15-story-frame structure,a model of beam and shell 3-D finite element structure was built and the frequency of structure and the mode of vibration were computed in the study;furthermore,the structural dynamic response was discussed under the simulating explosive seismic wave.The weak story of the structure is determined,according to the results of dynamic responses.The information can be used for the anti-seismic design of structure.
Explosion seismic waves were numerically studied with a non-stationary random process model.A practical simulating method of single-pointexplosion seismic waves was presented,in which the effects of distance and mass of explosive were put into consideration.Based on the case of a 15-story-frame structure,a model of beam and shell 3-D finite element structure was built and the frequency of structure and the mode of vibration were computed in the study;furthermore,the structural dynamic response was discussed under the simulating explosive seismic wave.The weak story of the structure is determined,according to the results of dynamic responses.The information can be used for the anti-seismic design of structure.
引文
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[2]林大超.爆炸地震波传播规律及其毁伤效应[D].北京:北京理工大学,2001.
[3]曾德斌,林大超,白春华,等.爆炸地震加速度幅值的包络函数模型[J].工程爆破,2001,7(3):1—4.
[4]国胜兵,潘越峰,高培正,等.爆炸地震波模拟研究[J].爆炸与冲击,2005,25(4):335—340.
[5]靳翠军,刘卫群,杨小军.高层建筑结构地震响应问题的ANSYS分析[J].黑龙江科技学院学报,2007,17(1):54—58.
[6]杜志刚,史承明,姜继方.钢筋混凝土框架改扩建结构设计[J].陕西理工学院学报(自然科学版),2008,24(4):19—22.
[7]梁建文,肖迪.非平稳随机过程模拟的一个谱表示方法[J].应用概率统计,2005,21(4):375—386.
[8]邹翾,张强,周德源,等.多遇地震作用下错层框架的非线性分析[J].陕西理工学院学报(自然科学版),2008,24(3):20—25.
[9]李海涛,邓樱.MATLAB程序设计教程[M].北京:高等教育出版社,2005.
[10]娄建武,龙源,徐金泉,等.人工模拟爆破震动信号及其频谱特性检验[J].工程爆破,2001,7(1):8—11.
[11]尚小江,邱峰,赵海峰,等.ANSYS结构有限元高级分析方法与范例应用[M].北京:中国水利水电出版社,2005.
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