隧道爆破施工影响下地面既有高耸结构抗震性能分析

发布时间：2018-11-04 14:30

【摘要】：为研究地下隧道爆破施工影响下的气象塔高耸结构抗震性能的安全问题,建立隧道爆破施工地震动荷载的确定方法以及隧道施工爆破振动能量的计算方程,重点探讨了地下隧道爆破施工影响下的气象塔高耸结构的位移场分布与地震动力响应,对比分析了地下隧道爆破施工影响下气象塔不同位置的动力响应的差异。结果表明:爆破地震波属近源脉冲型破坏地震波,横波的破坏能力与其破坏能量及强度有关,高细型的气象塔结构质量和刚度突变的结构薄弱层处应力突变现象明显,顶部雷达受鞭梢效应的影响较大,爆破地震动对其动力响应的放大效应明显,严重降低了地面高耸结构的抗震性能。
[Abstract]:In order to study the safety of seismic behavior of meteorological tower towering structure under the influence of underground tunnel blasting construction, the method of determining ground motion load in tunnel blasting construction and the calculation equation of blasting vibration energy in tunnel construction are established. The displacement-field distribution and seismic dynamic response of the meteorological tower towering structure under the influence of underground tunnel blasting construction are discussed emphatically, and the difference of the dynamic response of meteorological tower in different positions under the influence of underground tunnel blasting construction is compared and analyzed. The results show that the blasting seismic wave belongs to the near source pulse type destructive seismic wave, and the failure ability of the shear wave is related to its failure energy and intensity. The phenomenon of stress abrupt change in the weak layer of the structure with the abrupt structural mass and stiffness of the high and fine type meteorological tower is obvious. The top radar is greatly affected by the whipping effect, and the amplification effect of blasting ground motion on its dynamic response is obvious, which seriously reduces the seismic performance of the ground towering structure.
【作者单位】：辽宁工程技术大学力学与工程学院;河南能源义马煤业集团股份有限公司;郑州航空工业管理学院土木建筑工程学院;中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室;
【基金】：国家自然科学基金项目(51474045) 河南省高等学校重点科研项目(16A560013,16A560012)联合资助
【分类号】：TU352.11;U455.6

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