Tài liệu tham khảo Công nghệ xây dựng duy tu bảo dưỡng cầu chuyên ngành xây dựng bằng tiếng Anh - Thiết kế của các yếu tố Hạ tầng cơ sở ( Design of Substructure Elements ) | Source Bridge Engineering 4 Design of Substructure Elements Section Overview The substructure of a highway bridge consists of those components designed to support the superstructure and highway overpass. This section deals with the three major components in a highway bridge substructure abutments piers and bearings. Along with the design of these components the section will also touch on some of the key maintenance and rehabilitation issues which affect their performance. Of all the elements which make up a highway bridge substructure elements present some of the most visibly striking features. A towering column or hammerhead pier can provide a certain sense of majesty which leaves a lasting image upon the traveler passing under a bridge. To be sure for larger bridges the superstructure elicits much if not more of the same feeling. For the majority of highway bridges however the only striking aspect of the design is found in the substructure. Even a row of reinforced earth modular units snaking out along an abutment side slope can be quite aesthetically pleasing. If it can be said that the design of superstructure components varies greatly depending on geographic location and transportation department preferences the same would be equally true for substructure components. In this section we will cover the basic principles behind the design rehabilitation and maintenance of substructure components. Specifically the three major components which will be discussed are abutments piers and bearings. As with the presentation of superstructures provided in Section 3 the focus of the discussion will be on general concepts rather than specific forms of elements which vary greatly from region to region. Figure A highway bridge superstructure is supported by bearings piers and abutments. Downloaded from Digital Engineering Library @ McGraw-Hill Copyright 2006 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms .
