采用空心楼板系统的钢筋混凝土建筑的抗震脆性

IF 0.8 Q4 ENGINEERING, GEOLOGICAL
Tom Francis, Eyitayo A. Opabola, Timothy Sullivan, Kenneth Elwood, Cameron Belliss
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引用次数: 0

摘要

在 2016 年凯库拉地震(7.8 兆瓦)中,惠灵顿建筑中的空心楼板系统受到损坏,并被证明在低漂移要求下容易出现不良破坏机制(失座、负力矩和正力矩破坏模式)。在空心楼板系统的子装配和超装配实验室测试中也观察到了这些不良破坏机制,所获得的测试数据增强了对空心楼板单元可能的地震行为的最新了解。在本研究中,利用目前可用的子装配测试数据,定义了空心楼板系统的脆性函数。此外,建议的脆性函数与根据新西兰标准设计的两栋八层裸框架钢筋混凝土 (RC) 建筑的非线性动态分析得出的脆性信息相结合。这项研究表明,与采用不易受重力荷载影响的楼板系统的钢筋混凝土(RC)建筑相比,采用易受影响的空心楼板的钢筋混凝土(RC)建筑超过本研究定义的防倒塌极限状态的可能性要高得多。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seismic fragility of reinforced concrete buildings with hollow-core flooring systems
Hollow-core flooring systems were damaged in Wellington buildings during the 2016 Kaikoura earthquake (7.8 Mw) and have been shown to be susceptible to undesirable failure mechanisms (loss of seating, negative moment, and positive moment failure modes) at low drift demands. These undesirable damage mechanisms have also been observed in sub-assembly and super-assembly laboratory testing of hollow-core flooring systems and the test data obtained has enhanced the state-of-the-art knowledge of the probable seismic behaviour of hollow-core floor units. In this study, using currently available sub-assembly test data, fragility functions are defined for hollow-core flooring systems. Furthermore, the proposed fragility functions are combined with fragility information derived from nonlinear dynamic analyses for two eight-storey bare-frame reinforced concrete (RC) buildings designed based on New Zealand standards. This study shows that, in comparison with RC buildings with flooring systems that are not susceptible to gravity load failures, RC buildings with vulnerable hollow-core floors have a significantly higher likelihood of exceeding the collapse prevention limit state, as defined in this study.
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来源期刊
CiteScore
2.50
自引率
17.60%
发文量
14
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