03045nam a2200421 4500 20260818113846.0 010998 th eng .b11722083 AIT Thesis no. ST-97-06 Amnart Ngarmpaibulsombat Finite element analysis of circular arch bridges with variable cross sections Bangkok : Asian Institute of Technology, 1998 28 leaves Thesis ; no. ST-97-06 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1998 In this study, a parametric study of a thin-walled box section arch is conducted using finite element model. Bilinear degenerated shell element is employed for the analysis of the circular arch, prismatic as well as non-prismatic, with and without diaphragms. Due to the relative weakness in the transverse direction of the arch, special attention is given to the role of the arch parameters in providing lateral stiffness. These parameters are the horizontal component of the doubly curved arch, and the thickness ratio of the top and bottom plates over the side plates. From the study, it was found that diaphragms are very important to provide cross-sectional rigidity and lateral stiffness. With diaphragms, the thin-walled arch can be treated like a curved beam. It was also concluded that given that the top and bottom plates are relatively thin compared to the side plates, it will be more effective and economic to use a doubly curved arch with concave section than prismatic cross-section that consume more material without significant contribution to lateral stiffness. Bridges, Arched Finite element method Worsak Kanok-Nukulchai, Chairperson Gupta, Satyendra P., Examination committee Pichai Nimityongskul, Examination Committee Government of Austria, Scholarship donor Asian Institute of Technology. Thesis ; no. ST-97-06 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B13137 .b11722083 mnait y 240403 0 980901 m a y 0 mnait mnait mnarc 20 40 Barcode : 30050120661151 CREATED : 1997-04-04 RECORD # : i12088870 LPATRON : 1023673 LCHKIN : 2012-10-17 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 6 TOT RENEW : 2 Barcode : 30050120661169 CREATED : 1997-04-04 RECORD # : i12088882 LPATRON : 1018841 LCHKIN : 2006-12-14 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 5 TOT RENEW : 1 Barcode : 30050160006622 CREATED : 2016-03-23 RECORD # : i12903619 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 44839 44839 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. ST-97-06 30050120661151 2026-08-18 11:38:46 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. ST-97-06 30050120661169 2026-08-18 11:38:46 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. ST-97-06 30050160006622 2026-08-18 11:38:46 1 2026-08-18 40