L Type Dynamic Performance Analysis Of High-strength Concrete Block Reinforced Hollow Walls

This paper is mainly about the L type core structural columns of high strengthconcrete reinforced block hollow wall specimen dynamic properties. Using the largefinite element analysis software ANSYS to establish L type core structural columns ofhigh strength concrete finite element of reinforced block hollow wall mode, the aim isto study on dynamic characteristics of the wall under low cyclic loading.The concrete content is study on dynamic properties of the L type core structuralcolumns of high strength concrete reinforced block hollow wall under low cyclicloading. Taken different parameters such as the different stress, different strengthgrade of core column-constructional column concrete and block into the consideration.Study the influence on the vibration mode, period, hysteresis characteristics, skeletoncurve, stiffness degradation, ductility and energy consumption for the wall.First of all,the paper research the modal analysis,harmonic reaponse analysis andthe analysis of the low cycle repeated load pseudo static according to establish a finiteelement model of Yang Wenhui shaped reinforced concrete block hollow wall.Simulation results are compared with experimental values to verify the reliability toverify the correction of ANSYS.Through the same modeling method, establish L type core structural columns ofhigh strength concrete finite element of reinforced block hollow wall mode to studymodal analysis, harmonic response analysis and the analysis of pseudo static lowcyclic loading. Based on the modal analysis, mainly result is the first frequencies andthe first six vibration models. The harmonic response analysis is to calculate theresponse of wall in central frequency, get some value on the frequency curve, and findthe "peak" from the curve, the peak value is corresponding to the frequency of wallresonance value.From the wall the hysteretic curve, the hole is larger, the wall bearing capacityis smaller, and the impact is significant.The vertical compressive stress is greater, thewall bearing capacity is greater. To improve the core concrete strength grade andblock strength grade can improve the ultimate bearing capacity of the wall, but theformer was larger, the latter effect is smaller.Viscous damping coefficient increases with the vertical stress increasing.Whenstructural columns and blocks of concrete strength intensity level increases,the viscous damping coefficient also increased;improve material the intensity level alsoallows the wall to withstand the load capacity and energy dissipation capacityenhancement.Known as the ductility ratio, the vertical compressive stress is greater, thewall ductility ratio is larger, but when the vertical stress increased to a certain value,the wall ductility ratio increase effect decreases gradually. Improve the coreconstruction column strength grade of concrete and block strength grade were able tomake the wall ductility enhancement, but the former is obvious enhancement. Nosignificant to enhance the ductility of the wall of the hole wall effect, the greater theductility of the wall hole, the worse.