【摘要】 对地震作用下结构反应的复模态分解反应谱法进行了研究,指出在复模态分解反应谱法中,具有实特征值的模态不必组成二阶振动系统,可按一阶线性系统参与模态组合,且一阶线性系统只需要一条反应谱。给出了相应的复模态完全平方组合(CCQC)系数计算公式,该公式包括了一阶系统响应的相关函数和一阶系统响应与二阶系统响应之间的相关函数。通过算例验证了方法的可行性。更多还原

【Abstract】 This paper studies the complex modal superposition response spectrum method for analysis of structures under seismic loading.It states that when using complex modal superposition response spectrum method,one mode with real eigenvalue is not necessary to be combined with another real eigenvalue into 2nd order system and can be treated as 1st order system.The peak response solutions of both 2nd order system and 1st order system can be combined together using the complex complete quadratic combination(CCQC) method,and for 1st order system only one response spectrum is needed.Theory of random processes is used to developing the CCQC cross-correlation coefficient formula between 2nd order system and 1st order system.An example structure is used to check the feasibility of the proposed method.更多还原