To meet the wind energy development needs in low wind speed areas,a precast steel-concrete composite tower structure is adopted,comprising a lower concrete section and an upper steel section.The con-crete section consists of multiple cylindrical segments,which are connected using external prestressed steel strands.In this paper,a finite element model of the lower concrete section is established using software ABAQUS,and a detailed analysis is conducted under ultimate load conditions.The results indicate that under ultimate load,most contact areas between the concrete segments remain intact,maintaining the overall stability;the stiffness of the concrete tower is significantly improved compared to traditional steel towers.Additionally,the maximum principal compressive stress of the concrete is less than its compressive strength;the stress in the rebar is significantly lower than its yield strength and the maximum stress in the steel strands is less than the de-sign tensile strength.The stress in the steel strands shows little variation before and after loading,remaining ap-proximately equal to their effective prestress.
关键词
混凝土塔架/体外预应力/结构分析/接触状态/ABAQUS
Key words
Concrete towers/External prestress/Structural analysis/Status of contact/ABAQUS
维普
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