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A Precast Bridge Bent System for Seismic Regions

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  • Saadedin
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    • Sep 2018 
    • 35983 
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    A Precast Bridge Bent System for Seismic Regions




    1. INTRODUCTION

    The topic of the evaluation of the orientation of 90° and 180° of reinforcing bar hooks in concrete members was identified by the Concrete Reinforcing Steel Institute (CRSI) as highpriority

    for the reinforcing steel industry.

    The stress of longitudinal reinforcing steel of flexural elements is often developed

    at the end of a concrete member by a 90° or 180° standard hook that is

    usually oriented in the vertical direction. In some

    instances, such as the case of a shallow member

    that is heavily reinforced with steel deformed

    reinforcing bars, the standard hook height in

    accordance with ACI 318-08 plus concrete cover

    above and below the bar may exceed the thickness of

    the concrete member and the reinforcing bar must

    be tilted. A construction example can be seen in Figure 1.1. ( 1

    Photos used with permission from Jack Gibbons of CRSI.)


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