基于耐震时程法的渡槽结构地震响应及易损性分析

doi:10.11896/cldb.25110035

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Abstract To solve the problem of low efficiency in seismic fragility assessment of aqueduct structures, this work adopted a typical water-conveyance aqueduct structure in the southwest region as the research object to establish a finite element model of the interaction between the tank body-water-pier-foundation. The endurance time acceleration time-history curves, derived from the response spectrum specified in the hydraulic seismic design standard, was optimized and synthesized by the lsqnonlin function. The endurance time analysis method was employed to simulate and analyze the seismic responses, including acceleration, deformation, and bearing hysteresis characteristics, at various monitoring points, which reveal the seismic damage evolution law of aqueduct structures under different ground motion intensities. Besides, seismic fragility analysis of the aqueduct structure was conducted based on the endurance time analysis method and incremental dynamic analysis method, and the differences in damage exceedance probabilities under different limit states were compared. The results show that the endurance time analysis method can effectively predict the seismic response of aqueduct structures under different ground motion intensities. It is also possible to predict the hysteretic characteristic of isolation bearings and the overall damage evolution law of aqueduct structures with less calculation cost, which can meet the applicability requirements of the structure in nonlinear dynamic time history analysis. The seismic fragility curves of aqueduct structures drawn by the endurance time analysis method and incremental dynamic analysis method are basically consistent. Based on these, the endurance time analysis method is verified as an efficient and rapid seismic performance evaluation method. This work can provide new ideas for the seismic performance analysis of complex water-conveyance structures.

Key words： aqueduct structure endurance time analysis incremental dynamic analysis seismic response seismic fragility

Published: 10 August 2026 Online: 2026-08-31

CLC number:

TV672+.3

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https://www.mater-rep.com/EN/10.11896/cldb.25110035 OR https://www.mater-rep.com/EN/Y2026/V40/I15/25110035

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