Sanaz Daneshmand - Department of Civil Engineering,Azad university of kerman, Iran
Fateme Mohamadi - Department of Civil Engineering,Azad university of kerman, Iran
Amir a Hedayat - Department of Civil Engineering,Azad university of kerman, Iran

Structural engineers must find ways to design structure that will survive earthquake ground motion. Inthis particular case, this research project looked at steel buildings. The Special Truss Moment Frame(STMF) is a relative new type of steel structure system that is implemented in building to helpdissipate energy induced by earthquake ground motion. The frames dissipate earthquake energythrough ductile special segments located near the mid-span of truss girders. The inelastic behavior ofthe special segment, limits forces on all element outside the special segment, to the ultimate capacityof the middle (special) segment, thus enabling them to remain elastic buildings. The purpose of theSTMF system is to give buildings a system that will help reduce damage and prevent collapse whenearthquake hit. The drive to design a building with a STMF system is that they will be subjected tocontrolled damage. Building would repairable because damage would be confined only to the specialsegment. This is important because repair costs would be significantly reduced compared toconventional building design. The importance of this topic is that many lives would be saved becausebuildings would stand erect after an earthquake occurs.

Special Truss Moment Frame, special segment, chord elements