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Seismic CFST Column-to-Precast Cap Beam Connections for Accelerated Bridge Construction
| 题名： | Seismic CFST Column-to-Precast Cap Beam Connections for Accelerated Bridge Construction |
| 正文语种： | 英文 |
| 作者： | Max T. Stephens, S.M.ASCE; Lisa M. Berg; Dawn E. Lehman;Charles W. Roeder, M.ASCE |
| 作者单位： | Univ, of Washington |
| 关键词： | Precast concrete; Seismic design; Bridges; Concrete-filled tubes; Connection design： Metal and composite structures. |
| 摘要： | Concrete-filled steel tubes (CFSTs) frequently are a more efficient and economical structural solution then conventional rein-forced concrete and structund steel. For the same size member, CFSTs offer in creased strength and stiffness as well as accelerated construction. CFSTs may be used for bridge columns that will yield under earthquake loading, but this requires robust connections capable of sustaining large cyclic loads. To facilitate accelerated bridge construction, precast cap beams and girders are commonly used. Although CFST column-to-foundation connections have been studied, CFST column-to-precast cap beam corm ections have not. This is the focus of this research study .In contrast to cast-in-place (CIP) comp on ents, precast pier cap con nections require additi onal design considerations including construction methodology and limits on geometry. To investigate this connection an integrated analytical and experimental research program was performed. Initially, continuum finite-element methods were used to conduct a parametric study; the results from that study determined the values of the study parameters and selection of the experime ntal specimens. Three different corm ection types were studied: (I) an embedded ring CFST, (2) a welded dowel, and (3) an interior reinforced concrete connection. Large-scale, pseudostatic tests were conducted. Results from the experimental investigation showed that the three connection types provide excellent deformability under reversed-cyclic loading and minimized damage in the cap beam. DOI: 10.1061/(ASCE)ST. 1943-541 X.0001505. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2016.09 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.09 |
| 页码： | 04016049 |
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