埋置基础扭转振动的实用化计算  

Practical calculation for torsional vibration of embedded foundation

作　　者：刘志久[1,2] 尚守平[2] 

机构地区：[1]中南大学土木工程学院,湖南长沙410083 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《地震工程与工程振动》2012年第2期167-171,共5页Earthquake Engineering and Engineering Dynamics

基　　金：中国工程建设标准化协会课题项目(799-201113)

摘　　要：根据弹性半空间理论及基础振动试验和数值计算的最新成果,采用方程对等法推演出埋置块体基础扭转振动的实用化计算公式。采用该实用化计算公式和弹性半空间理论分别对复杂形状的埋置块体基础在谐和扰力矩作用下的扭转振动动力响应进行计算,并将计算结果进行了比较,两者结果吻合,振幅误差为9.13%。该实用化计算公式具有概念明确,计算简单的优点,对于任意形状、任意埋置状况的动力设备块体基础都实用,对于结构工程的地震响应计算具有参考意义。The practical calculation formulas for torsional vibration of lumped embedded foundations are derived on the basis of the theory of elastic half-space and the state-of-the-art results of comprehensive experimental and numerical calculation by using equation equivalence method.The torsional dynamic responses of a complicatedly shaped embedded lumped foundation are calculated by using the formulas,and compared with the results of calculation performed with the theory of elastic half-space and agreement is found between this formulas and the theory of elastic half-space for torsional vibration,and the difference of amplitude is only 9.13%.The advantages of the formulas are clear concept and simple calculation.It is practical for power equipment lumped foundation with arbitrary shape and arbitrarily embedded lumped foundations.It is referential to the calculation of the seismic responses of structural engineerings.

关 键 词：块体基础 扭转振动 弹性半空间 方程对等法 动力响应. 

分 类 号：TU435[建筑科学—岩土工程] P315.9[建筑科学—土工工程]