CAJ | 학술논문

在建筑结构动力特性与抗震性能分析中，为了缩短运算时间，经常采用简化三维模型，如何提高计算精度将是最关键的问题。通过 ANSYS 建立简化三维模型与真三维计算模型，对比分析其结构动力特性和抗震性能时程。计算结果表明：应当分开考虑简化三维模型的质心、形心和剪心几何位置，保证计算结果符合客观实际；并根据材料阻尼比、质量矩阵、振型矩阵直接计算阻尼矩阵，可克服 Rayleigh阻尼的不足。在简化三维模型中考虑以上因素，运算效率提高，结果真实可靠。
재건축결구동력특성여항진성능분석중，위료축단운산시간，경상채용간화삼유모형，여하제고계산정도장시최관건적문제。통과 ANSYS 건립간화삼유모형여진삼유계산모형，대비분석기결구동력특성화항진성능시정。계산결과표명：응당분개고필간화삼유모형적질심、형심화전심궤하위치，보증계산결과부합객관실제；병근거재료조니비、질량구진、진형구진직접계산조니구진，가극복 Rayleigh조니적불족。재간화삼유모형중고필이상인소，운산효솔제고，결과진실가고。
In calculation of building structure dynamic characteristics and seismic performances,a simplified model is usually used for saving time.By using ANSYS,simplified three dimensional model and real dimensional moolel are built to compare the dynamic characteristics and seismic resistance results,which proved that simplified three dimensional model gives out geometric positions of mass center,figue center,and shear center would make results reflect the practical situation;also,calculating damping matrix directly based on material damping ratio,mass matrix,and mode matrix would resolve the deficiency of Rayleigh damping. However,above considerations in simplified three dimensional model would improve arithmetic efficiency and precision.