Large deflection behavior effect in reinforced concrete columns exposed to extreme dynamic loads

被引:74
作者
Abedini, Masoud [1 ]
Mutalib, Azrul A. [2 ]
Zhang, Chunwei [1 ]
Mehrmashhadi, Javad [3 ]
Raman, Sudharshan Naidu [4 ]
Alipour, Roozbeh [5 ]
Momeni, Tohid [5 ]
Mussa, Mohamed H. [2 ]
机构
[1] Qingdao Univ Technol, Sch Civil Engn, Qingdao 266033, Peoples R China
[2] Univ Kebangsaan Malaysia, Dept Civil & Struct Engn, Ukm Bangi 43600, Selangor, Malaysia
[3] Univ Nebraska, Dept Mech & Mat Engn, Lincoln, NE 68588 USA
[4] Univ Kebangsaan Malaysia, Dept Architecture & Built Environm, Ukm Bangi 43600, Selangor, Malaysia
[5] Islamic Azad Univ, Dept Mech Engn, Mahshahr Branch, Mahshahr, Iran
关键词
RC column; scaled distance; blast load; LS-DYNA; MESHFREE METHOD; BOND-SLIP;
D O I
10.1007/s11709-020-0604-9
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Reinforced concretes (RC) have been widely used in constructions. In construction, one of the critical elements carrying a high percentage of the weight is columns which were not used to design to absorb large dynamic load like surface bursts. This study focuses on investigating blast load parameters to design of RC columns to withstand blast detonation. The numerical model is based on finite element analysis using LS-DYNA. Numerical results are validated against blast field tests available in the literature. Couples of simulations are performed with changing blast parameters to study effects of various scaled distances on the nonlinear behavior of RC columns. According to simulation results, the scaled distance has a substantial influence on the blast response of RC columns. With lower scaled distance, higher peak pressure and larger pressure impulse are applied on the RC column. Eventually, keeping the scaled distance unchanged, increasing the charge weight or shorter standoff distance cause more damage to the RC column. Intensive studies are carried out to investigate the effects of scaled distance and charge weight on the damage degree and residual axial load carrying capacity of RC columns with various column width, longitudinal reinforcement ratio and concrete strength. Results of this research will be used to assessment the effect of an explosion on the dynamic behavior of RC columns.
引用
收藏
页码:532 / 553
页数:22
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