【摘要】 首先总结了近些年单层网壳的节点刚度对结构静力力学性能和地震响应影响的研究概况。前人的研究中大多没有按照实际情况考虑焊接空心球的刚度,而强震下部分球节点的塑性变形可能会明显影响到结构整体的动力特性。在这方面开展了一些深入的研究,研究表明在建模时建立考虑球节点刚度的精细化模型是必要的,除此之外,要想真正实现精细化研究还需在几何精细化模型的基础上加入能够考虑损伤累积效应的本构模型,实现双重精细化。更多还原

【Abstract】 This paper provides a review of recent research about the effect of spherical joint stiffness on the static and seismic response of single-layer reticulated shell structures.Previous research did not account for the realistic stiffness of welded hollow spherical joints.However,in the case of strong earthquake,spherical joints might experience plastic deformation and this can significantly affect structural dynamic capacity of the entire structure.A detailed numerical study is carried out in this research and the effect of spherical joint stiffness is evaluated.Results show that it is necessary to establish refined model considering spherical joint stiffness,besides that,it is suggested that refined geometric model should be improved by incorporating constitutive model which can account for damage accumulation effect so as to realize double refinement.更多还原