Combining the excellent thermal insulation performance,lightweight,environmental friendliness of polysty-rene granule concrete,and the high stiffness of steel truss frames,a new type of prefabricated lightweight insulation wall panel is proposed.Monotonic four-point bending tests were performed on three specimens to assess the planar flexural be-havior of the specified wall panel design and examine deformation characteristics.The experimental results demonstrate the outstanding mechanical properties of this wall panel type,emphasizing its substantial ductility.Enhancing the quantity of steel trusses in the wall panel significantly improves its flexural performance,leading to a 115.9％increase in ultimate bearing capacity when the number of trusses is increased from one to four.
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