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为了完善外包钢混凝土结构的设计方法，电力建设研究所作了外包钢混凝土节点在使用阶段的抗扭试验，研究其受力状态和破坏机理，从而为外包钢混凝土构件的设计及施工提供抗扭设计计算方法。
In order to improve the design method of the steel-encased concrete structure, the Electric Power Construction Research Institute made a torsion test of the steel-concrete joints in the service phase to study the stress state and failure mechanism, and provide the design and construction of the steel-clad concrete member. Torsional design calculation method.