| Title |
A Study on the Joint Displacement Constraint Method for the Floor Diaphragm |
| Keywords |
Floor Diaphragm ; Dynamic Analysis ; Joint Displacement Constraint ; Computer Program ; Algorithm |
| Abstract |
Dynamic analysis requires so many calculation times, especially at the time history analysis by direct integration method or mode superposition method. There are many methods to reduce calculation time in dynamic analysis, floor diaphragm among these methods is the most preferred method in building structure analysis. Floor diaphragm is only a concept to represent the slab behavior in a building structure, its realization in FEA has to be performed by constraint of nodal displacements or degrees of freedom(d.o.f). Computer programs for the dynamic analysis of a building structure like ETABS, sap2000, neoMAX3D, midas use their own methods for realizing floor diaphragm concept. But, we can't find out the algorithm used in these programs because they are commercial programs. So, it is necessary to do research first about the joint displacement constraint method for the floor diaphragm in the case of developing a computer program independently. In this study, a method for transforming floor diaphragm concept to computer program is suggested for the analysis of a building structure by joint displacement constraint. For this suggestion, a theory for the joint displacement constraint method and the investigation of some commercial programs is done firstly, then a computer program(sNs) is developed based on the theory and algorithm studied. Lastly, a sample analysis is performed to verify the possibility of application of sNs. |