To improve the torsion resistance of precast concrete sandwich panels under sudden torsion during manufacture,transportation and earthquake.The torsion tests of 6 groups of 18 precast concrete sandwich panels were carried out,and the effects of shear connector width,number and shear connector spacing on the torsion performance of the specimens were analyzed.As a result,when the width of the shear connector increases from 160 mm to 200 mm,the torsional bearing capacity of the shear connector increases by 32%;compared with the single-piece shear connector,the torsional bearing capacity of the double-piece shear connector increases by 51%;when the distance between the two-piece shear connector is 100 mm,the load is slightly larger than 50 mm,and the difference is less than 14%.The torsional failure of precast concrete sandwich panel belongs to ductile failure,and it is suggested to use two-piece shear connectors with 100 mm spacing to improve the torsional performance of the shear connectors under unreliable conditions.
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