Cable-stiffened single-layer latticed structures with quadrilateral meshing have recently became increasingly popular to cover large-span areas due to their architectural aesthetics and high strength-to-weight ratio. Previous studies have indicated that using out-of-plane cables has a crucial role in improving instability-related issues and collapse load. In this study, the instability and collapse behavior of cable-stiffened single-layer latticed barrel vaults have been investigated using novel out-of-plane cables in an effort to achieve the appropriate model. Several parameters including, span lengths, rise-to-span ratios, strut lengths, and boundary conditions have been considered in the analyses. Using a certain amount of pre-stressing to the cables, the models have been designed under conventional load combinations including, namely dead, snow, earthquake, and wind loads. Nonlinear finite element analyses under symmetric and asymmetric snow load distributions have been carried out, considering an elasto-plastic behavior with hardening for the steel materials and an elasto-plastic behavior for the material of the cable. Based on the collapse load, collapse mechanism, energy absorption, minimum cables usage, and simplicity of construction, the appropriate model was selected. In addition, these results indicate that collapse without dynamic snap-through is the main collapse mechanism in all of the models when subjected to the selected load patterns. The increase in the stiffness, collapse load, and energy absorption is found to be dependent on the form of the out-of-plane cables. In addition, in the symmetric loading pattern, the effect of support arrangement is negligible. It has been found that the out-of-plane cables in the longitudinal directions of cable-stiffened single-layer latticed barrel vaults bring about an insignificant increase in the collapse load. Also, increasing the strut lengths increases the collapse load.

中文翻译：

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具有新型平面外电缆形式的电缆加强单层筒形拱顶的倒塌行为

由于其建筑美学和高强度重量比，具有四边形网格的索加筋单层网状结构最近变得越来越流行，以覆盖大跨度区域。先前的研究表明，使用平面外电缆在改善与不稳定性相关的问题和坍塌载荷方面具有至关重要的作用。在这项研究中，使用新型平面外电缆研究了索加强单层格子筒形拱顶的不稳定性和坍塌行为，以期获得适当的模型。分析中考虑了几个参数，包括跨度长度、升跨比、支柱长度和边界条件。对电缆使用一定量的预应力，这些模型是在常规载荷组合下设计的，包括：雪、地震和风荷载。考虑到钢材料的硬化弹塑性行为和电缆材料的弹塑性行为，已经进行了对称和非对称雪荷载分布下的非线性有限元分析。根据倒塌载荷、倒塌机理、能量吸收、最少电缆使用量和施工简单性，选择了合适的模型。此外，这些结果表明，在所有模型中，当承受选定的载荷模式时，没有动态快速穿过的坍塌是主要的坍塌机制。发现刚度、坍塌载荷和能量吸收的增加取决于平面外电缆的形式。此外，在对称加载模式中，支撑布置的影响可以忽略不计。研究发现，索加筋单层格子筒形拱顶纵向上的平面外索对倒塌荷载的增加并不显着。此外，增加支柱长度会增加坍塌载荷。