详情

Evaluation of the Orientation of 90° and 180° Reinforcing Bar Hooks in Wide Members

项目名称：	Evaluation of the Orientation of 90° and 180° Reinforcing Bar Hooks in Wide Members
摘要：	Longitudinal reinforcing steel in concrete flexural elements is often developed at the end of a concrete member by a 90° or 180° standard hook that is usually oriented such that the hook is in the vertical direction. In some instances, such as the case of a shallow member that is heavily-reinforced with reinforcing bars of large diameter, the standard hook height in plus concrete cover above and below the bar may exceed the thickness of the concrete member. To address this issue, sometimes it is suggested that the hook may tilted from vertical to maintain the required clear cover. The limits of this tilt, however, are not defined or known. To address this issue, the overall goal of the proposed project is to study the influence of tilt angle on the development of standard reinforcing bar hooks and determine determine the limits of reinforcing steel hook tilt, if any, so ultimate performance of the member is not compromised. Design recommendations developed as part of this study will provide clarification to engineers and building code officials regarding limits of tilt of hooked reinforcing bars so that the original intent of hooked bar development is met.
状态：	Completed
资金：	45000.00
资助组织：	Concrete Reinforcing Steel Institute
开始时间：	20090801
实际结束时间：	20110501
主题领域：	Bridges and other structures；Highways；Research；I30: Materials