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P-δ Effects on the Plastic Region of RC Bridge Columns: Closed-Form Solution
| 题名： | P-δ Effects on the Plastic Region of RC Bridge Columns: Closed-Form Solution |
| 其他题名： | ACI(American Concrete Institute).(2011)."Building code requirements for structural concrete and commentary."ACI 318-11,Farmington Hills,MI. |
| 正文语种： | 英文 |
| 作者： | Ata Babazadeh |
| 关键词： | Geometric nonlinearity;Reinforced concrete;Bridge;Concrete column;Slenderness ratio;Closed form solutions;Analysis and computation |
| 摘要： | A closed-form solution to the effect of member deformations (δ) on the inelastic response of RC bridge columns is presented. The formulation is based on an equivalent elastic structure with a constant flexural stiffness for the cracked RC section that enables the solution to be independent of the structural global displacements (Δ). The ability of the proposed solution for predicting moment, curvature, and displacement profiles in RC columns is demonstrated and verified against experimental data from four half-scale test columns. The closed-form solution led to the identification of a dimensionless slenderness parameter that measures the susceptibility of RC columns to second-order effects. Simplified formulas for the spread of the plastic region (Lpr) and the magnitude of P-δ moment are proposed for use in seismic design. The design formulas, derived from the mechanics-based solution, are shown to be able to predict experimental data on the P-δ effects with satisfactory accuracy. |
| 出版年： | 2016 |
| 论文唯一标识： | P-26Y2016V142N11031 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001595 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 142 |
| 期： | 11 |
| 页码： | 353-363 |
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