A Corbelless Steel Anchor Beam

Abstract

The invention provides a steel anchor beam without corbels. The steel anchor beam without the corbels comprises end supports (1), a middle balance beam (2) and stay cable anchoring heads (3). The end supports (1) are connected with tower walls (4) through shear studs (15) or PBL shear keys (16), and the end supports (1) are connected with a web (5) and top plates (6) of the middle balance beam (2) through high-strength bolts. The stay cable anchoring heads (3) are symmetrically arranged on a bottom plate (7) located on the inner sides of the two ends of the web (5) of the middle balance beam (2), and under-anchor #-shaped plates (10) of the stay cable anchoring heads (3) are connected with the web (5), the top plates (6) and the bottom plate (7) of the middle balance beam (2). The steel anchor beam without the corbels has the advantages that the overall height of the steel anchor beam structure is reduced; when a stay cable is tensioned, the middle balance beam slides on connecting bolt hole positions in a self-adaptive mode in the cable force direction, constraint in the horizontal direction of the middle balance beam is released, so that deformation is generated, and the middle balance beam bears the horizontal component balance part of the stay cable. According to the steel anchor beam without the corbels, it is guaranteed that the steel anchor beam bears the most horizontal component of the stay cable, the problem of height limit of the steel anchor beam is solved, meanwhile steel consumption is reduced, and therefore the application range of the steel anchor beam is widened.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of bridge components, in particular to a steel anchor beam connected to the end of a cable-stayed cable tower of a cable-stayed bridge. Background technique [0002] The anchorage area of ​​cable-stayed bridge tower is an important structure for force transmission between the cable-stayed cable and the main tower. Its local stress is large and the force transmission is complicated, which has a great influence on the durability of the bridge tower. There are three main types of anchorage structures for cable towers of long-span cable-stayed bridges: steel anchor boxes, steel anchor beams, and hoop prestress. The steel anchor box is actually an anchoring scheme for a steel-concrete composite structure. The concrete tower wall and the steel anchor box are jointly stressed during the dead load stage. Generally, a certain horizontal circumferential prestress needs to be set to prevent th...

AI Technical Summary

Problems solved by technology

However, in the anchorage structure of the steel anchor beam, due to the high combined height of the steel anchor beam and the corbel, for the cable-stayed bridge with dense cable system, the vertical cable distance on the bridge tower is small, and the anchorage height and space of the cable tower are limited. Therefore, the scope of application of the traditional steel anchor beam anchorage form is greatly limited

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