Author: Phoo Hwa Chen

Publisher: Forgotten Books

Published: 2018-02-08

Total Pages: 32

ISBN-13: 9780656084456

Excerpt from An Investigation of Comparative Deflections of Steel Arch Ribs With Three, Two and No Hinges: An Abstract of a Thesis Presented to the Faculty of the Graduate School for the Degree of Doctor of Philosophy; Cornell University An investigation of the comparative deflections of steel arch ribs is a very complicated problem. The design of a three-hinged arch is not affected by temperature nor by rib-shortening. The effect of tempera ture and rib-shortening on arches with two or no hinges varies for differ ent ratios of rise to span. Finally, different designers may assume differ ent ranges of temperature and percentages of over-stress. Realizing these complications, the writer paid special attention to finding the easiest methods of computation for the benefit of future investigators, rather than to compute only the value for deflection. The general process of finding the easiest methods of computation used in this thesis is to analyze general equations into a number of con tributing factors; then to treat each factor separately. The advantages of this process are: (1) each factor may have a very simple solution; (2) it gives the computer a clearer conception of the problem; (3) it offers an opportunity to study the relative importance of different con tributing factors and to neglect some of the factors; (4) it may suggest the easiest solution by omitting certain negligible factors. The special features of this thesis are: (i) the method of stress com putation for the three-hinged arch; (2) the method of computing deflections for the three-hinged arch; (3) the method of computing deflections due to axial thrust-for two and no hinged arches; (4) the assumption of moment of inertia for the preliminary design of the hinge less arch; (5) the method of stress computation for the hingeless arch. Though no special merit is claimed, these few points are believed to be new. The writer wishes to express his appreciation and gratitude for valuable suggestions and encouragement received from Prof. H. S. Jacoby, chairman of the committee. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.