分块式预制综合管廊接头非线性转动刚度理论与数值研究  

Theoretical and Numerical Study on Nonlinear Rotational Flexural Stiffness of Block-type Precast Utility Tunnel Joint

作　　者：陈海勇 张佳庆 程睿 王丹生[2] CHEN Haiyong;ZHANG Jiaqing;CHENG Rui;WANG Dansheng(China Railway Development Investment Group Co Ltd,Kunming 650200,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan Engineering Co Ltd of China Railway Seventh Group,Wuhan 430074,China)

机构地区：[1]中铁开发投资集团有限公司,云南昆明650200 [2]华中科技大学土木与水利工程学院,湖北武汉430074 [3]中铁七局集团武汉工程有限公司,湖北武汉430074

出　　处：《土木工程与管理学报》2023年第2期44-50,共7页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51878314)。

摘　　要：分块式预制综合管廊是一种新型地下管廊结构,其接头处的力学性能往往直接影响管廊的运营安全。现有综合管廊接头转动刚度理论模型有的公式较为复杂,有的准确度不高,难以运用于实际工程中。本文对采用螺栓连接的分块综合管廊横向接头在整个加载阶段的转动刚度进行了理论研究,推导出4个不同受力阶段的接头转动刚度理论计算公式。建立了分块管廊横向接头的三维有限元模型,并对接头处的挠曲变形、接触面应力分布进行了研究。将分块综合管廊接头转动刚度理论、数值与试验结果进行了对比分析,验证了理论公式、有限元分析方法的正确性。由于本文所提出的理论计算公式较为简洁,且所涉及参数很容易得到,因此该公式对预制装配式综合管廊接头性能的评估适用性较好。Block-type precast utility tunnel(BPUT)is a new type of underground utility tunnel structure,the mechanical properties of BPUT joints affect the safety of the operation.Some formulas of existing theoretical models of rotational stiffness for BPUT transverse joint are complicated and some are in low accuracy,so it is difficult to apply them to practical engineering.In this paper,the rotational stiffness of BPUT joint with bolted connection in the whole loading stage is studied theoretically.The theoretical formulas for calculating the flexural stiffness of transverse joint in four different stress stages are derived.The three-dimensional finite element model of the BPUT joint is established,the rotational deflection of transverse joint and the stress distribution of contact surface are studied.The theoretical and numerical results of the rotational stiffness of the BPUT joint are compared with the experimental results,which verifies the correctness of the theoretical formulas and finite element analysis method.The proposed theoretical calculation formulas have good applicability to the performance evaluation for BPUT joint because they are relatively simple in form and the parameters involved are easy to be obtained.

关 键 词：分块式预制综合管廊 横向接头 非线性转动刚度 螺栓连接 

分 类 号：TU990.3[建筑科学—市政工程]