Steel Arch Bridge Research Articles

Buckling analysis of steel arch bridges

Abstract Steel arch bridges are analyzed. The shape and the height of the arch are variable and the arch's supports are either pinned or fixed. A uniformly distributed load and a moving concentrated load are considered. The location and the magnitude of the minimum elastic critical loads are computed for various values of height to span ratios and load combinations. The influence of arch rib height on the critical loads is studied and the interaction curves between critical concentrated and critical uniform loads are given. Finally the accurate optimum arch heights for all cases are obtained. The results are presented in graphical and tabular form.

Steel-Arch Bridges in the Meiji-Taisho era and their Presence or not

Steel-Arch Bridges in the Meiji-Taisho era and their Presence or not

IN-PLANE ULTIMATE STRENGTH OF DECK-TYPE FIXED-END ARCH BRIDGES

Fixed-end restraint effect of arch ribs on the over-all, in-plane ultimate strength of deck type steel arch bridges is studied by an accurate nonlinear finite element approach. This approach takes into consideration the two important factors on nonlinearities, namely, geometric and material. The interaction between bending moment and axial thrust, the changes in deflection mode, and the progress of yielding and unloading zones with load level until the ultimate state are throughly examined. The load-deflection behavior, until the stability limit load is reached, has also been analyzed by elastic theory. Special characteristics of the local member failure of arch rib between the posts are finally investigated.

Optimum rise design of steel arch bridges

Abstract The subject of this paper is the preliminary estimation of the optimum rise of the arch rib in the case of steel arch bridges. This optimum rise is defined in relation to the weight of the construction material used for the arches and columns, while the cost of erection is ignored. A series of arch bridges, having various spans are examined. These bridges have a flexible deck and a stiffened arch rib. For each span the optimum rise is obtained, when the weight of the arches and columns is minimized. The results are given in diagrams in which the variation of the optimum rise with respect to various characteristic parameters, is shown.

Lateral Load Effect on Steel Arch Bridge Design

Design criteria for lateral load effect of two‐hinged, parabolic, steel arch bridge structures are presented on the basis of the ultimate limit state design concept. The arch structures are composed of two main ribs connected by a lateral bracing system. The load combination that is considered consists of vertical loading and practical lateral loading to which bridge structures are actually subjected. Based on results of their load carrying capacity analyzed by three‐dimensional finite element method, ways of incorporating practical lateral loading effects in the ultimate strength designing of steel arch bridge structures are presented. The required out‐of‐plane rigidities of steel arch bridge structures are also proposed.

Lateral Load Effect on Load Carrying Capacity of Steel Arch Bridge Structures

Several numerical results for the load carrying capacity of two hinged, parabolic, steel arch bridge structures—determined by an accurate finite element approach—are presented. The arch structures are composed of two main ribs connected by a lateral bracing system. The load combination that is considered consists of vertical loading and practical lateral loading to which bridge structures are actually subjected. From the numerical results, the influence of several parameters on the strength of arch structures is discussed. It is concluded that the load carrying capacity of arch bridge structures with conventional out-of-plane rigidities, under vertical and practical lateral loading, may be determined by a simpler, quasi-planar structural analysis.

OPTIMUM DESIGN CONSIDERATIONS FOR ARCH BRIDGES.

Keywords PEMBROKE COLLEGE, KINGS COLLEGE, OXFORD UNIVERSITY OPTIMUM, DESIGN, ARCHES, BRIDGES, PROFILES, HINGES, ABUTMENTS, CROWNS, RIBS, DEPTH, MATERIALS, GRADES, ACTION, TRUSSES, LOADS, STRESS, TEMPERATURE, LIVE, DEAD, EFFECT, TRAFFIC, SECTIONS, SYMMETRICAL, HIGH GRADE, CONTINUOUS, ENCASTRE, HINGED, CENTRE... Show All

Fifty-Year Development: Construction of Steel Arch Bridges

During the past 50 years there have been major changes in the engineering, fabrication, and construction of steel arch bridges. The laser surveying instruments, high-strength steels, numerically controlled drilling, welding, and high-strength bolts have all had tremendous impact on field construction. The methods of erecting have also vastly improved the efficiency, time, and safety of bridge construction. Erection methods vary from supporting the arch by falsework or wire rope tiebacks to jacking large heavy spans several hundred feet above river level. Fifty years ago, falsework was made of square timber formed into bents supported by wooden piles. Today, it is made from light reusable steel sections. Large floating derricks are used to lift heavy pieces, often eliminating the need for travelers mounted on the bridge.

Paper 16: Incremental Collapse of a Steel Arch Bridge under Repeated Live and Thermal Loading

Paper 16: Incremental Collapse of a Steel Arch Bridge under Repeated Live and Thermal Loading

Stability Problems of Compressed Steel Members and Arch Bridges

Stability of bridge arches in vertical planes and lateral stability of bridge arches braced with transverse struts; for each kind of buckling, method is given for determining critical load and increment of moment due to elastic deflections; description of model tests; table shows numerical data on critical loads; it is concluded that buckling considerations need not preclude use of slender arches for bridges.

ULTIMATE STRENGTH OF TWO-HINGED SOLID RIB STEEL ARCH BRIDGE

In this paper, the author experimentally checks the load carrying capacity of plastically buckled thin steel plate and proposes an approximate calculating method of its value. Considering this behavior of thin plate the author discusses the ultimate strength of two-hinged solid rib steel arch bridge under static loads.

Design of Flexible Steel Arches by Interaction Diagrams

Direct method of structural design; interaction diagram developed gives fiber stress and deflection of arch cross section as function of its dimensions; it is analogous to structural interaction diagram for statically determinate structure, namely beam column; design method illustrated by design of quarter point sections of following steel arch bridges: 2-hinged rainbow, Bayonne, and hingeless rainbow.

The Economics of Steel Arch Bridges

Up to the present time, nothing at all certain has been known concerning the economics of steel arch bridges, the weights of metal required to build them, or how they compare in cost with corresponding steel truss bridges. The objects of this paper and its anticipated discussions are to settle finally every important economic question that can arise in the designing of steel arches; to give formulas and diagrams for determining, with a fair amount of accuracy, the weights of metal in both arch bridges as a whole and the arches themselves; and to indicate the relations between the weights and costs of arch bridges in comparison with those of corresponding truss bridges.

Discussion on Economics of Steel Arch Bridge

Discussion on Economics of Steel Arch Bridge

Closure to Economics of Steel Arch Bridge

Closure to Economics of Steel Arch Bridge

New Steel Arch Bridge over the Niagara

New Steel Arch Bridge over the Niagara