UHPC装配式内嵌耳式企口阀厅结构抗震性能分析OACHSSCD

To investigate the dynamic characteristics and seismic responses of the novel UHPC prefab-ricated valve hall structure with embedded mortise-and-tenon joints,a 1∶3 scaled model of typical structural components was designed and fabricated for bidirectional shake table tests and numerical simulations under varying seismic intensity levels.The results indicate that the UHPC prefabricated wall-embedded valve hall structure exhibited favorable operational performance during loading,with effective collaborative load-bearing behavior achieved between firewall panels and columns through embedded mortise-and-tenon connections.Both elastic and plastic drift angles remained within speci-fied code limits,while the displacement amplification in the direction of lower stiffness was more pro-nounced under bidirectional seismic input.Under 8-degree rare earthquake conditions,the structure experienced significant stiffness degradation and entered plastic damage state,accompanied by in-creased crack development.Notable cracking and damage were observed at wall panel corners and mid-height regions of concrete columns,though the maximum inter-story drift angle remained below code thresholds.The proposed embedded mortise-and-tenon UHPC prefabricated valve hall structure demonstrates satisfactory overall seismic performance for high-intensity seismic zones.Given the tensile-shear stress stateat the interlocking tenon-protrusions and column mortise-grooves,vertical cracks were frequently observed at connection interfaces during testing.It is recommended to enhance the horizontal reinforcement configuration in wall-end tenon protrusions to mitigate shear-induced cracking.