Effect of segmental joint stiffness on tunnel lining internal forces under static conditions

نویسندگانGholamhossein Ranjbar- Kourosh Shahriar- Kaveh Ahangari
نشریهJournal of Mining and Environment
ارائه به نام دانشگاهدانشگاه آزاد اسلامی، واحد علوم و تحقیقات، گروه مهندسی معدن
نوع مقالهFull Paper
تاریخ انتشار2019-09-24
رتبه نشریهISI
نوع نشریهچاپی
کشور محل چاپایران
چکیده مقاله<table cellpadding="0" cellspacing="2" dir="ltr" width="98%"> <tbody> <tr> <td colspan="2" id="abs_en">According to the wide application of segmental lining in mechanized tunneling, recognizing the behavior of segmental lining joints is important in tunnels designing. In structural analysis of the tunnel segmental lining, segmental joints can be considered as elastic joints and their stiffness characteristics are affected by rotational, shear and axial stiffness. The purpose of this study is to investigate the effect of rotational, shear and axial stiffness of segmental lining joints on internal forces (bending moment and axial force), and indicate the bearing capacity of the tunnel segmental lining under static loading by numeral method. For this purpose, three-dimensional numerical analysis was done by ABAQUS software. The results show that by increasing rotational stiffness of the segmental joint, bending moment increases, and for lower values of rotational stiffness, bending moment variations are higher, while axial force variations are very slight in compared to joints rotational stiffness. So by increasing the bending moment, bearing capacity of segmental lining decreases. By increasing axial and shear stiffness of the segmental joint, changes of bending moment and axial force in segmental lining are very negligible. Therefore, increasing axial and shear stiffness of the joint, has no effect on the bearing capacity of the segmental lining.</td> </tr> <tr> </tr> </tbody> </table>

لینک ثابت مقاله

tags: segmental lining; joint stiffness; bearing capacity; static loading; numerical analysis