Seismic Energy Response And Behavior Assessment Of Frame-corewall Hybrid Structures

Frame-corewall hybrid structure is a main structural form in china’s high-risebuildings, the seismic failure mechanism and seismic performance of this structuralform are research hotspots both in domestic and overseas; Energy-based seismicresponse analysis and seismic design methods are not only clear in concept, but alsocontain the factors of structure’s cumulative hysteretic energy, as well as the structuralmember’s cumulative damage caused by the ground motion duration. At present,seismic energy response analysis research about Frame-corewall hybrid structure ispoor, it is of important theoretical to study the seismic response and performanceassessment of this structural form based on energy method. Therefore, researches havebeen done and the main contents are presented as follows:First of all, total input energy equation of the MDOF system was deduced throughthe vibration mode decomposition theory. This proves that the total input energy can bemade of MDOF system corresponding to the sum of the total input energy ofequivalent SDOF system to express, through a lot of time-history analysis of thenumerical example demonstrates the validity of this method. Then the elastic andelastic-plastic total input energy calculation method of high-rise Frame-corewall hybridstructure was established based on the method of MPA, the elastic pseudo-velocityspectrum and the elastic-plastic total input energy spectrum. The analysis resultsshowed that the validity of this method. Studies have shown that the energy caused byhigh order vibration mode can’t be ignored. After the total input energy of the structureis determined,9considering different structural components parameters offrame-corewall hybrid structure were designed and a large number of elastic-plastic time-history analysis were ran. The structure’s hysteretic energy dissipation ratioinfluenced by ground motion parameters was studied. The transmission anddistribution regularities of hysteretic energy dissipation in the structural componentswere analyzed. Hysteretic energy dissipation distribution pattern along the structuralheight direction was analyzed. At last, according to two different double-failurecriterion based on energy and displacement and one single-failure criterion based onenergy, two structures’ damage under the effect of ground motion were evaluated. Theresults showed that using displacement single parameters on seismic performance ofhigh-rise frame-corewall hybrid structure of evaluation was insufficient, cumulativehysteretic energy dissipation should be considered for the influence of structuraldamage.