Collapse-resistant Performance of RC Frame Structure Addressing Bond-slip Effect

HE Qingfeng，DENG Yingting, YI Weijian

Abstract

    Reinforced concrete(RC) frame beams will undergo large deformation stages in the process of collapse. In order to study the influence of bond-slip effect of reinforcing bars on the progressive collapse resistance of RC frame beams, especially in the suspension stage, the beam-column joint element was used to numerically validate the experimental results of a restrained beam substructure on the basis of OpenSees nonlinear finite element analysis platform and a set of parameters in the bond-slip model of reinforcing bars. The analysis results effectively reflect the elastic and plastic deformation, arch-compression effect and mechanical characteristics of the suspension stage of the structure, which are in good agreement with the experimental results. On the basis of the above analysis results, further simulations were conducted in a single-story plane RC frame structure and a three-story plane RC frame structure. In addition, the effects of number of stories and spans on the collapse-resistant performance of the plane frame structure were investigated. The force mechanism was also analyzed.

 

Keywords: beam column joint element,  bond slip,  collapse-resistant performance,  beam-column sub-structure,  reinforced concrete frames,  numerical simulation


Full Text:

PDF


References


OLIVEIRARS，RAMALHO M A，CORRE A M R S. A layered finite element for reinforced concrete beams with bond-slip effects [J]. Cement and Concrete Composites，2008，30(3)：245—252.

LOWES L N，MITRA N，ALTOONTASH A. A beam-column joint model for simulating the earthquake response of reinforced concrete frames [R] . Berkeley：Pacific Earthquake Engineering Research Center，2003：1—54.

SHAFAEI J，ZAREIAN M S，HOSSEINI A，et al. Effects of joint flexibility on lateral response of reinforced concrete frames [J] . Engineering Structures，2014，81:412—431.

YU J，TAN K H. Experimental and numerical investigation on progressive collapse resistance of reinforced concrete beam column sub-assemblages [J] . Engineering Structures，2013，55(4)：90— 106.

HE Q F，ZHOU C，YI W J. Numerical simulation on collapse behavior of RC frames with a column removal under blast loads[J] . Journal of Hunan University (Natural Sciences)，2016，43(11)： 61—67.(In Chinese)

LEIYD，QU Z，WANG T. Bidirectional cyclic loading tests on spatial beam -column joints in ground floor of moment -resisting RC frames [J] . China Civil Engineering Journal，2014, 47(12)：64—72.(In Chinese)

YANG H，BAI S L. Elastoplastic earthquake response of structure considering slippage between longitudinal steel bar and concrete of beam in nodes[J] . China Civil Engineering Journal，2004，37(5)： 16—22.(In Chinese)

SOLEIMANI D，POPOV E P，BERTERO V V. Hysteretic behavior of reinforced concrete beam-column subassemblages [J] . Journal Proceedings. 1979，76(11)：1179—1196.

YANG H，ZHAO W T，MO L H，et al. Seismic response analysis of RC frame considering inelastic deformations of beam-column joints [J] . Journal of Hunan University(Natural Sciences)，2014，41(9): 27—34.(In Chinese)

XIE L L，YE X G，CHONG X，et al. Research and verification on joint odel of RC frame structure in OpenSees [J] . Engineering Mechanics，2014，31(3):116—121.(In Chinese)

ELIGEHAUSEN R，POPOV E P，BERTERO V V. Local bond stress-slip relationships of deformed bars under generalized excitations [R] . Berkeley：Pacific Earthquake Engineering Research Center，1983：23—82.

SHIMA H，CHOUL L，OKAMURA H. Bond characteristics in postyield range of deformed bars[J] . Proceading of the Japan Society of Civil Engineers，1987，1987(378)：213—220.


Refbacks

  • There are currently no refbacks.