| Along with reform and open to go deep into, be used as an important marking in the development middle class family society -residence construction develops fast. Multi-ribbed composite Slab Structure, as a new structural system, is very potential. But there is still a lot to be advancedresearch, complement in the development application process of new construction system. The paper , through the test of shear property and the factor analysis, studied rigdity and restoring force characteristic of multi-ribbied slab. Finished work as following:Though aseismic test of nine 1/2-scaled model and one 1/4-scaled model slabs, the paper studied breakage form, bearing capacity and energer consume, questioned stagnant speciality and contrast analyzed all kinds of factors influenting rigidity. Test showed that under level loads the damage process of multi-ribber slab was according to the order of silice bric^ concrete frame ^ outer gimbal, released energy classificately, had perfect energy consume and anti-collapse capacity.Considering the special structure of multi-ribbed slab, founding diphase body mechanical model of compound material, strengthening rib beam and rib pillar by equivalent volume ratio of concrete and slice brick, the paper drew elastic compution constant and shear constant. Based on the things, the paper simplified isotropy compution model to wall, gave practical design formula of elastic mold and shear mold, provided necessary parameter for practical design formula of elastic rigidity. Finally the calculating results agree well with the text results.According to the bearing capacity , rigidity , failure mode and deformation capcacity, the paper put forward four-line restoring force style of multi-ribbed slab. Through multiple experment date compare, the paper concluded the reduction factor of rigidity of other stage to elastic stage. Consulting the previous research , the paper suggested the calculation method of every characteristic parameter point in restoring force model.
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