CAJ | 학술논문

节点刚度不仅影响网壳的静力性能,对网壳的动力性能也有一定的影响.为认识其对网壳动力性能的影响规律,本文应用ANSYS中的Matrix27单元建立节点刚度单元模型,研究了节点刚度变化时网壳动力性能的相应变化.采用动力时程分析法研究了不同节点刚度对网壳地震响应的影响.计算结果表明,节点的轴向刚度和弯曲刚度对网壳的自振特性和地震响应均有一定的影响,实际工程中考虑节点刚度的影响能更准确地反映结构真实性能.
절점강도불부영향망각적정력성능,대망각적동력성능야유일정적영향.위인식기대망각동력성능적영향규률,본문응용ANSYS중적Matrix27단원건립절점강도단원모형,연구료절점강도변화시망각동력성능적상응변화.채용동력시정분석법연구료불동절점강도대망각지진향응적영향.계산결과표명,절점적축향강도화만곡강도대망각적자진특성화지진향응균유일정적영향,실제공정중고필절점강도적영향능경준학지반영결구진실성능.
The joint stiffness not only affects the static behavior of reticulated shell,but also influences the dynamic performance.To grasp the influencing rule,the finite element model of joint stiffness is realized using the Matrix27 element of ANSYS package,and then vibration characteristic of reticulated shells with different joint stiffness is discussed. By dynamic timehistory analysis, earthquake response of the structure with different joint stiffness is also analyzed.Numerical results indicate that both of the axial stiffness and the bending stiffness of joint affect the vibration characteristic and dynamic response of the reticulated shells.Therefore,in real projects,the influence of joint stiffness should be considered to understand the behavior of the structure accurately.