Abstract
The nonlinear analysis of pounding between bridge deck segments subjected to multi-support excitations and multi-dimensional earthquake motion was performed. A novel bottom rigid element (BRE) method of the current displacement input model for structural seismic analysis under the multi-support excitations was used to calculate structural dynamic response. In the analysis, pounding between adjacent deck segments was considered. The seismic response of a multi-span bridge subjected to the multi-support excitation, considering not only the traveling-wave effect and partial coherence effect, but also the seismic non-stationary characteristics of multi-support earthquake motion, was simulated using finite element method (FEM). Meanwhile, the seismic response of the bridge under uniform earthquake was also analyzed. Finally, comparative analysis was conducted and some calculation results were shown for pounding effect, under multi-dimensional and multi-support earthquake motion, when performing seismic response analysis of multi-span bridge. Compared with the case of uniform/multi-support/multi-support and multi-dimensional earthquake input, the maximum values of pounding force in the case of multi-support and multi-dimensional earthquake input increase by about 5–8 times; the absolute value of bottom moment and shear force of piers increase by about 50%–600% and 23.1%–900%, respectively. A conclusion can be given that it is very necessary to consider the pounding effect under multi-dimensional and multi-support earthquake motion while performing seismic response analysis of multi-span bridge.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.