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In order to ensure the safety and stability of the construction process of the bidirectional outward inclined arch tower cable-stayed bridge, the optimization design method of construction measures is put forward. The objective function of optimization is the safety and economy of construction measures. The stress safety of cable-stayed bridge in each construction stage is the constraint condition. The construction method of cable-stayed bridge is optimized by determining the position and structure form of construction measures. The prestressed concrete cable-stayed bridge with single tower and double cable plane in the shape of golden camellia is taken as the engineering background. The position and causes of the hidden danger in the construction of the bridge are analyzed. This method is applied to optimize the construction method, and three cross bracings are to be set up in the construction stage of the main tower. The optimized construction method is applied to actual construction. The results show that this method can design better construction measures. The optimized construction method effectively controls the stress and line shape of the main bridge during the construction phase. The maximum tensile stress of the main tower is controlled at 1. 67 MPa, and the maximum horizontal displacement of the tower top is maintained at 14. 50 mm. The stress state of the main bridge construction can meet the safety requirements. The measured stress of the main tower is consistent with the finite element calculation, and the error is within 5%. This method scientifically and effectively guides the construction and achieves good results. [ABSTRACT FROM AUTHOR]

To investigate out-of-plane behavior of infilled frame due to different construction measures, collapse simulation of the structure is carried out by LS-DYNA software. The influences of construction measures of infilled frame and grades of mortar are researched, respectively. The results show that the collapse prevention capacity of infill walls is effectively improved by increasing the grade of mortar and setting steel tie bars. The space of tie bars is advice to reduce when infilled structures are beyond the eighth seismic precautionary intensity. Other reasonable measures can be also adopted to protect infill walls from collapse and ensure the safety of people's life and possessions. [ABSTRACT FROM AUTHOR]