特高压双回路输电线塔线耦联体系振动台试验模型设计理论与方法

Design theory and method of shaking table test model for a UHV double circuit transmission tower-line coupled system

为进行特高压输电线路塔线耦联体系模型振动台试验,研究特高压输电塔架及输电塔—线耦联体系地震反应特点,提出具有几何非线性的特高压同塔双回输电线塔线耦联体系振动台模型设计理论与方法。针对钢管塔工程要求,按振动台模型线弹性相似理论缩尺模拟输电塔。限于振动台面尺寸,对带有强几何非线性大跨度、大截面八分裂导线,提出参数分离式模型设计理论:分别采用惯性质量相似与动力特性相似原则,确定八分裂导线模型的配重与弧垂设计方法,并从选材、相似比确定、边界条件及方案设计等对试验模型进行详细阐述。该模型设计方法可为具有强几何非线性体系结构缩尺模型振动台试验提供借鉴及参考。

In order to study the seismic responses of a UHV transmission tower structure and tower-conductor coupled system, a shaking table test for the model of this system is needed. Scaled model design method for a UHV transmission tower-8-bundled-conductor with strong geometric nonlinearity was presented here. Based on the requirements for design of a steel tubular tower, a scaled tower model was designed according to the elastic similitude relationship. Due to the size limitation of a shaking table, in order to simulate, a 8-bundled-conductor with long spans, large cross-sections, and strong geometric nonlinearity, the model design theory with parameters separating was proposed. The inertia mass similarity criterion and the dynamic property similarity criterion were simultaneously adopted to determine the mass balance and the sag of the model of a 8-bundled-conductor, respectively. The material selection, dynamic similarity relations. Boundary condition, and detailed design of the shaking table model for the UHV transmission tower-conductor coupled system were introduced. The proposed method provided a reference for the scaled shaking table model test of structures with strong geometric nonlinear characteristics.