Design of Headed Anchor Bolts. Design of Headed nchor Bolts JOHN G. SHIPP AND EDWARD R. HANINGER In current practice the design of base plates is controlled by bearing restrictions on the concrete (see Fig. The embedment requirements for anchorage steel are not clearly defined by most codes and are left largely to the discretion of the design engineer. Also, there are no provisions to prevent a brittle failure in the concrete as opposed to a ductile failure in the anchor bolt, as provided for with a probability- based limit states design or Load and Resistance Factor Design (LRFD) for steel. Larger design forces now mandated in many areas due to the revised seismic and wind loads require design capacities for anchor bolts beyond any existing code values. Therefore, there is a need for a complete design procedure for anchor bolts that will accommodate these larger loads and incorporate the proposed design philosophy, i. PBLSD). 8 THE HE DED BOLT S N NCHOR GE The headed bolt, as designed herein, is recommended as the most efficient type of anchorage to use for both tension and shear loads. Other anchorages which have been used are L- bolts, J- bolts, rods with a bolted bearing plate and shear lugs. L- bolts have been shown to be less effective in resisting slip at service load levels than headed bolts. The authors are not aware of any published data that addresses the performance of J- bolts. For a threaded rod with a bolted washer or bearing plate embedded in concrete, tests have shown that unless the plate is properly sized it may actually decrease the anchor capacity by causing a weakened failure plane in the concrete. Shear lugs can fail in a brittle mode if not properly confined, and do not lend themselves to a shear friction analysis. The headed bolt, when properly embedded and confined, will develop the full tensile capacity of even A4. John G. Shipp is Supervising Structural Engineer, Fluor Engineers and Constructors, Inc., Irvine, California. Edward R. Haninger is Senior Structural Engineer, Fluor En- gineers and Constructors, Inc., Irvine, California. ![]() When the tension capacity of the bolt is developed, a ductile failure can be ensured by the shear friction mechanism. In this paper, anchor bolt design ductility is assured by causing a failure mechanism that is controlled by yielding of the anchor bolt steel, rather than brittle tensile failure of concrete. This is accomplished by designing the pullout strength of the "concrete failure cone" (Up) such that it equals the minimum specified tensile strength (Fu. At) or ufull anchorage value" of the anchor bolt. See Figs. 2 and 1. See Appendix A for the derivation of L^ to satisfy this criteria. The design approach presented herein is compatible with the proposed AISC Specification for Nuclear Facilities,5 ACI 3. ACI 3. 18- 7. 7. 7 The governing design approach is that presented in ACI 3. Supplement 1. 97. DESIGN PARAMETERS The design approach presented is generally applicable to any of a number of bolt or concrete strengths. However, the following representative materials are used in developing the design values. Anchor bolt materials used are ASTM A3. A3. 07 (Grade B), A3. A4. 49 and A6. 87. Design of Headed Anchor Bolts Author. Format: PDF File Stock. there is a need for a complete design procedure for anchor bolts that will accommodate these.Simulated Seismic Loading DRAFT Final. in. diameter headed studs were installed at the ends of the. the design capacity of anchor bolts in shear specified. Behavior and Design of Steel Anchor Systems in Cementitious Concrete. for the design of headed anchor studs is. formula for the capacity of anchor bolts. Design of Headed Anchor Bolts JOHN G. SHIPP AND EDWARD R. HANINGER In current practice the design of base plates is controlled by bearing restrictions on the concrete. Concrete is assumed to have a minimum compressive strength (fc) of 3,0. Anchor bolts are heavy hex bolts or threaded steel bars with one heavy hex nut placed in concrete. Bolt threads at the embedded end of each threaded steel bar are "staked" at two places below the heavy hex nut. All bolts are brought to a "snug tight" condition as defined by AISC4 to ensure good contact between attachments. The concrete is at least 1. Anchor bolts are designed for combined shear and tension loads; the area of steel required for tension and shear is considered additive. Criteria will be presented such that either Working Stress Design (WSD) or Ultimate Strength Design (USD) may be used. ![]() COMBINED TENSION AND SHEAR Many authors have presented data and interaction equations to account for the combined effects of tension and shear 5. ENGINEERING JOURNAL / AMERICAN INSTITUTE OF STEEL CONSTRUCTION. VIP会员,VIP会员可以用 1 筑龙币 超低价下载。升级VIP 全年免费 下载所有已购买资料,不会重复扣币。您已经是筑龙网VIP会员,资料购买以后在VIP会员有效期内都可以进入“我的资料馆”免费下载,不会重复扣币。. ![]() ![]() [英文]design of headed anchor bolts 的摘要、目录、介绍和全文下载 筑龙首页>> 筑龙资料馆 登录 | 注册 建筑圈. 文件格式: (pdf ) 文件大小:140KB 上传网友. Design of Headed Anchor Bolts - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Design of Headed Anchor Bolts. Design of Cast-in Headed Anchor Bolts (ACI 318-05) Cast-in Headed Anchor Bolts (ACI 318-05) fy 2/38 Cast-in Headed Anchor Bolts (ACI 318-05) 3/38 Cast-in Headed Anchor. Detail and install anchor bolts embedded in concrete masonry. Headed anchor bolts. STRENGTH DESIGN OF ANCHOR BOLTS.
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