Metal beam with asymmetrical section and damage warning function

A metal beam with asymmetric section and damage warning function, comprising a main body and a floor deck;

• a flange on the main body being fixed with the floor deck through a shear stud, so as to form an integral beam;
• the main body comprising a main body section;
• the main body section having a cross-sectional shape which defines a neutral axis, and the main body section defining a pressure zone and a tension zone when subjected to a pure bending moment load;
• each point of the main body being arranged in a linear relationship with respect to the neutral axis within an elastic range;
• the cross-sectional shape of the main body section being asymmetrically arranged on both sides of the neutral axis;
• the pressure zone of the main body section at the maximum bending moment of the main body having a section modulus greater than a section modulus of the tension zone;
• before the pressure zone bears a stress reaching the elastic limit to yield, the tension zone bears a stress exceeding the elastic limit to yield first and enters a plastic deformation, such that the plastic deformation of the tension zone provides a warning about a possibly occurring compressive shear damage of the pressure zone.