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首页> 外文期刊>Journal of structural engineering >Performance of Steel Frames with Different Web Bolt Number and Arrangements in a Column-Loss Scenario
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Performance of Steel Frames with Different Web Bolt Number and Arrangements in a Column-Loss Scenario

机译：钢框架的性能具有不同的网螺栓数和列丢失方案中的布置

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摘要

When a steel frame is subjected to an abnormal load, a sudden local failure due to the loss of a load carrying member may result in progressive collapse of the entire structure. In this study, experiments and numerical simulations were performed to investigate the anti-collapse performance of double half-span assemblies (a column connected with two half-span beams) with welded unreinforced flange-bolted web (WUF-B) connections in a column removal scenario. Three types of bolted webs-two bolts in one row, three bolts in one row, and four bolts in two rows-were considered. For the post-peak response, the connections exhibited a significant resistance recovery owing to the catenary action. The bolt-bearing areas on the beam web were prone to fracture owing to excessive compression, and the failure modes of the web varied significantly with the bolt arrangement. The test results demonstrate that increasing the number of bolt rows is a fairly effective approach for enhancing the anti-collapse performance of the WUF-B connections. Numerical models were used to further investigate the effects of the bolt arrangement on the anti-collapse performance of the WUF-B connections. The results indicate that the bolt arrangement can directly affect the response of the connections after the first peak load, especially in the catenary phase.
机译：当钢框架经受异常负载时，由于负载承载构件的损失而导致的突然局部失效可能导致整个结构的逐渐塌陷。在该研究中，进行实验和数值模拟，以研究双半跨度组件的防塌陷（与两个半跨度梁连接的柱），在列中焊接未粘合的法兰螺栓网（WUF-B）连接删除方案。一排三种螺栓螺栓螺栓，一排三个螺栓，两排中的四个螺栓 - 被考虑在考虑。对于后峰值响应，由于凸起的作用，连接表现出显着的抗性恢复。由于过度压缩，梁网上的螺栓承载区域容易裂开，并且幅材的故障模式随着螺栓布置而显着变化。测试结果表明，增加螺栓行的数量是提高WUF-B连接的防塌陷性能的相当有效的方法。数值模型用于进一步研究螺栓布置对WUF-B连接的抗塌陷性能的影响。结果表明，螺栓布置可以直接影响第一峰值负荷之后连接的响应，尤其是在凸起相位。

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