Optimisation of long-span single-layer spatial grid structures to resist progressive collapse
Optimisation of long-span single-layer spatial grid structures to resist progressive collapse
复制标题
大跨单层空间网架结构抗连续倒塌优化
DOI：
10.1016/j.engstruct.2019.03.025
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发表时间：
2019-06
影响因子：
5.5
通讯作者：
Hao Ji ping
中科院分区：
文献类型：
--
作者：
Tian Li min;Wei Jian peng;Hao Ji ping
大跨度单层空间网架结构在公共建筑中得到广泛应用。由于其大跨度和单层的特点，在发生意外事件时很容易倒塌。在本研究中，在从单层空间网格结构抽象出来的四个子结构上测试了一种常用的加固技术。虽然在构件与节点之间构造了固定端，但该方法对于提高抗连续倒塌性能并不理想。因此，优化方法在两个方面进行了修改，以考虑不同的故障机制。首先，采用双层构件来提高稳定性能。这实现了延性破坏过程，因为不可预测的屈曲会转化为延性破坏。其次，使用未粘合的构件来进行强度失效相关的优化。嵌入管的存在产生了两个塑料区域以提高旋转能力。上述改进的优化方法有利于能量耗散，从而提高单层空间网格结构的稳定性和强度破坏性能。
Long-span single-layer spatial grid structures are widely applied in public buildings. Given their long-span and single-layer characteristics, they can easily collapse during accidental events. In this study, a commonly used reinforcing technology was tested on four substructures that were abstracted from single-layer spatial grid structures. Although a fixed end between the member and joint was constructed, the method is not ideal to improve progressive collapse resistance. Therefore, the optimisation method was modified in two aspects to consider different failure mechanisms. First, a double-layer member was used to improve the stability performance. This realised a ductile failure process because unpredictable buckling is converted to ductile failure. Second, an unbonded member was used for optimisation relative to strength failure. The presence of the embedded pipe produced two plastic areas to promote rotation ability. The aforementioned modified optimisation method is favourable for energy dissipation, and thereby improves the performance of single-layer spatial grid structures with respect to stability and strength failure.
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影响因子：
7.4
作者：
Kamal Alogla;L. Weekes;Levingshan Augusthus-Nelson
通讯作者：
Kamal Alogla;L. Weekes;Levingshan Augusthus-Nelson
提高大跨单层空间网架结构的抗连续倒塌能力
影响因子：
7.4
作者：
Jian-peng Wei;Li-min Tian;Ji-ping Hao
通讯作者：
Ji-ping Hao
双横臂预拉斜拉防屈曲支撑弹性屈曲及抗荷载理论与数值研究
影响因子：
5.5
作者：
Yan-Lin Guo;Peng Zhou;Mark Andrew Bradford;Yong-Lin Pi;Jing-Zhong Tong;Peng-Peng Fu
通讯作者：
Peng-Peng Fu
DOI：
10.1061/9780784404454
发表时间：
1990
期刊：
--
影响因子：
--
作者：
E. Cohen
通讯作者：
E. Cohen
影响因子：
5.5
作者：
Yan-lin Guo;Peng-Peng Fu-Peng;Peng Zhou;J. Tong
通讯作者：
Yan-lin Guo;Peng-Peng Fu-Peng;Peng Zhou;J. Tong