Study On The Influence Of Different Staircase Models On Frame Structure System

The destructive earthquakes happened in recent years.The stairs as an important way to escape when the earthquake happens.But they are destroyed at times.The stairs need not only a good seismic performance but also frame column and frame beam which are also frame column and frame beam which are also needed to pay more attention。The three models of PKPM are established which the stairs are involve in the whole calculation(sliding support,rigid support)and stairs not involved in the whole caculation.Taking a Yangling primary school to expand the teaching building as an example,he will discuss that these three different kinds of stairs will have different impact on the overall structure.Through establishing three different kinds of stairs,he are going to make comparion and analysis.Structural cycle and mode analysis、Analysis of effective mass factor for X and Y axis to participate in mode of earthquake direction、Analysis of shear weight ratio and its adjustment under earthquake action、Displacement analysis under positive eccentric static(specified horizontal force)conditions 、Displacement of earthquake condition、Reinforcement calculation of staircase frame column and beam。By constrastive analysis,there are different influences on the overall structure through the stairs built in PKPM caculation.He can see that stairs are not involve in the overall caculation and artificially increase the stair load,hence reinforcement will be max among these three models.While the stairs are involved in the overall calculation,hence the stairs of sliding support will be larger in the overall calculation,but the force is clear.He should give priority to sliding support staircase。The research of this paper can be use as a reference for structural designers and provide some technical support for the selection of stair layout model.