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分析和解决当小半径曲线段预应力张拉时，施加张拉应力达到设计控制应力而钢铰线应变不能满足设计应变的±６％范围的问题。
To analyze and solve the problem that when the prestressing tension of the curve segment with small radius is applied, the tensile stress is controlled to the design control level and the strain of the steel hinge line can not meet the range of ± 6% of the designed strain.