Performance based analysis of reinforced concrete structures with different properties by various solution methods

The aim of this study is, investigate the earthquake demands in members and variation in overall structural performance level, there are four reinforced concrete structures are analysed with three different earthquake demand estimation methods; linear elastic evaluation method, nonlinear incremental equivalent seismic load method and nonlinear static modal pushover analyis which first two of them are implemented into the Turkish Earthquake Code- Specification for Buildings to be built in Earthquake Areas?2006. Two of the four and eight storey structures have same plan area and symmetry. Another pair of structures also have same plan area but have a torsional irregularity according to Specification for Buildings to be built in Earthquake Areas?2006. Example four reinforced concrete buildings are proportioned and detailed according to requirements given in Specification for Buildings to be built in Earthquake Areas?2006. In the earthquake assesment analysis, these existing cross section dimensions, concrete quality, reinforcement bar size and numbers are used. Structures are analysed with nonlinear incremental equivalent seismic load and nonlinear static modal pushover analyis to compare earthquake demands, like top story lateral displacements, inter story drifts, beam and coloumn plastic rotations and plastic member distribution and hinge mechanism along structures. In nonlinear methods structural performans levels are determined by these earthquake demands for the performance point obtained by Displacement Coefficient Method. Structural performance levels again determined by linear elastic evaluation method which based on the member demand-to-capacity ratios and these structural performances determined for the earthquake intensity which have the probability of exceedance within a period of 50 years is %10, are compared. vi In the member performance decision, Specification for Buildings to be built in Earthquake Areas ? 2006 member damage estimation method based on earthquake concrete or reinforcement strain demand and FEMA 356 member damage estimation method based on earthquake plastic hinge demand are compared also. In section analysis, the corelation between member strain demand and plastic hinge rotation demand taken as a output data from the nonlinear static pushover analysis, is investigated to determine the which reinforced concrete member component damage leads the member damage. In this thesis study, the confinement effect on member damage level is also investigated. For this purpose, when performing the method describe in Specification for Buildings to be built in Earthquake Areas?2006, confined and unconfined concrete model was used while obtaining the section moment-curvature relationship. Similarly, while performing FEMA 356 member damage estimation method, plastic hinge demands compared with numerical acceptance criteria for performance levels. The results are presented by graphics and tables in the concerning chapters. Keywords: Linear elastic evaluation method, nonlinear incremental equivalent seismic load method, nonlinear static modal pushover analysis, displacement coefficient method, member damage, performance level, torsional irregularity, confinement effect