小滑动支承对跨活断层明钢管受力的影响

发布时间：2018-12-28 19:34

【摘要】：为研究小滑动支承方式对明钢管承载特性的影响,以国内某实际跨活断层明钢管工程为例,建立分别由传统的铰支座与所提出的垫层支墩作为小滑动传力支承的数值模型,探明小滑动支承的传力行为.研究结果表明:与铰支座相比,采用垫层支墩支承钢管会降低伸缩节的补偿量,钢管受力也更加均匀;钢-垫层之间的摩擦系数取值对伸缩节补偿量和滑动支座滑移距离的影响较为显著,但对钢管的受力状态不会产生质的影响.相比铰支座,采用垫层支墩作为跨活断层明钢管的小滑动传力支承更加合理可行,且钢-垫层间的摩擦系数取值是结构设计阶段不可忽略的问题,应以控制合理的伸缩节补偿量和滑动支座滑移距离为确定摩擦系数的主要目标.
[Abstract]:In order to study the influence of small sliding bearing mode on the bearing characteristics of open steel pipe, a numerical model of traditional hinged support and cushion pier as small sliding force transfer support is established, taking a practical domestic project of open steel pipe with active fault as an example. To investigate the force transfer behavior of small sliding supports. The results show that: compared with the hinged support, the steel pipe supported by cushion pier will reduce the compensation of the expansion joint, and the force of the steel pipe will be more uniform. The value of friction coefficient between steel and cushion has a significant effect on the compensation of expansion joint and slip distance of sliding support, but it has no effect on the stress state of steel pipe. Compared with hinge support, it is more reasonable and feasible to use cushion pier as small sliding force transfer support for open steel pipe with active fault, and the value of friction coefficient between steel and cushion is a problem that can not be ignored in structural design stage. The main objective of determining friction coefficient should be to control the reasonable compensating amount of expansion joint and slip distance of sliding bearing.
【作者单位】：长江科学院水利部水工程安全与病害防治工程技术研究中心;武汉大学水资源与水电工程科学国家重点实验室;中国电建集团昆明勘测设计研究院有限公司;
【基金】：国家自然科学基金资助项目(51609020,51679013,51409194) 中央级公益性科研院所基本科研业务费资助项目(CKSF2017067/GC,CKSF2016015/GC)
【分类号】：TV34

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