Covariance proper transformation-based pseudo excitation algorithm and simplified SRSS method for the response of high-rise building subject to wind-induced multi-excitation

• Published in: Engineering structures Vol. 100; pp. 425 - 441
• Main Authors: Huang, D.M., Zhu, L.D., Chen, W.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2015
• Subjects: Covariance proper transformation-pseudo-excitation algorithm; Covariance proper transformation-simplified SRSS method; High-rise building; Main contribution load modes; Multi-group and multi-point wind excitation; SRSS combination method; Multi-group and multi-point wind excitation; SRSS combination method; Covariance proper transformation-pseudo-excitation algorithm; Covariance proper transformation-simplified SRSS method; Main contribution load modes; High-rise building
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2015.05.040

•A CPT-PEA+SRSS method for calculating responses caused by multi-wind excitation.•A CPT-SSRSS+SRSS method for calculating responses caused by multi-wind excitation.•The influence parameters on responses are analyzed based on the CPT-SSRSS method.•The proposed CPT-PEA and CPT-SSRSS method are more effective than the SPT-PEA. A fast pseudo excitation algorithm and a fast simplified SRSS method based on covariance proper transformation (CPT-PEA and CPT-SSRSS, respectively) combined with SRSS methodology are proposed for use in calculating the random vibrational responses of high-rise buildings subject to multi-group and multi-point wind excitations. A 492m building is used as an example to illustrate application of the methods. The effects of different parameters on the response are analyzed using the CPT-SSRSS method. A comparison of the computed responses with those computed using a traditional CQC approach and measurements from wind tunnel tests on an aeroelastic model demonstrate the feasibility of the proposal to combine the CPT-PEA and CPT-SSRSS techniques with the SRSS method.