不同柱梁抗弯承载力比对框架结构抗倒塌性能的影响
发布时间：2018-11-18 18:58
【摘要】：设计不同柱梁抗弯承载力比(ηc-bua)的5个纤维增强混凝土(FRC)框架结构及3个钢筋混凝土(RC)框架结构,利用性能评估软件Perform-3D进行Pushover及IDA计算分析,得出其破坏机制及易损性曲线。结果表明,柱、梁端部局部采用FRC后,承载力有一定提高,峰值位移有较大提高;ηc-bua对FRC框架结构的破坏机制影响很大;ηc-bua对FRC框架结构地震反应也有一定的影响,其比值越大,超越概率越小,且随期望破坏程度的加重,这种影响也趋于明显,当ηc-bua在1.2以上时,结构的倒塌概率均小于10%,满足大震不倒的概率要求。
[Abstract]:Five fiber reinforced concrete (FRC) frame structures and three reinforced concrete (RC) frame structures with different ratio of flexural bearing capacity (畏 c-bua) of column beams were designed. Pushover and IDA were calculated and analyzed by using the performance evaluation software Perform-3D. The failure mechanism and vulnerability curve are obtained. The results show that the bearing capacity and peak displacement of column and beam end are improved by using FRC, and 畏 c-bua has great influence on the failure mechanism of FRC frame structure. 畏 c-bua also has a certain influence on the seismic response of FRC frame structure. The larger the ratio, the smaller the transcendental probability, and with the increase of expected damage degree, the effect tends to be obvious, when 畏 c-bua is above 1.2, The collapse probability of the structure is less than 10.
【作者单位】： 西安建筑科技大学土木工程学院;中国建材国际工程集团有限公司;
【基金】：国家自然科学基金项目(51278402)
【分类号】：TU31
[Abstract]:Five fiber reinforced concrete (FRC) frame structures and three reinforced concrete (RC) frame structures with different ratio of flexural bearing capacity (畏 c-bua) of column beams were designed. Pushover and IDA were calculated and analyzed by using the performance evaluation software Perform-3D. The failure mechanism and vulnerability curve are obtained. The results show that the bearing capacity and peak displacement of column and beam end are improved by using FRC, and 畏 c-bua has great influence on the failure mechanism of FRC frame structure. 畏 c-bua also has a certain influence on the seismic response of FRC frame structure. The larger the ratio, the smaller the transcendental probability, and with the increase of expected damage degree, the effect tends to be obvious, when 畏 c-bua is above 1.2, The collapse probability of the structure is less than 10.
【作者单位】： 西安建筑科技大学土木工程学院;中国建材国际工程集团有限公司;
【基金】：国家自然科学基金项目(51278402)
【分类号】：TU31
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