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周颖

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期刊论文

CYCLIC STATIC TESTS OF STEEL ENCASED RC TUBES AND COUPLED WALLS

周颖XILIN LU YING ZHOU MINGANG WU

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摘要/描述

Composite members and hybrid systems are to be widely used in the high-rise buildings to make full use of structural steel and concrete. By employing the steel reinforced concrete (SRC) wall system, structural engineers expect to obtain the increase of stiffness, strength, ductility and fire resistance capacity; the compact cross-section of high-rise systems; and the reduction of construction cost and time. Due to the deficiencies in the present codes and in the research base, however, better rules for determining shear carrying capacity of SRC walls are needed. This paper is focusing on the tests and formulations of SRC coupled walls (SCW) and SRC tubes (ST). Three 1/5 scaled specimens of SCW were tested under cyclic loading and constant axial force, while three ST specimens were subjected to reversed loading without axial force. These specimens were measured with the time history and observed failing in shear. The formulae of ultimate shear strength of SCW and ST were then established on the basis of the shear-bearing mechanism analysis of RC structural walls. Predictions of shear strength from the proposed method are compared with experimental results. Taking the safety margin of the design into consideration, formulae of SRC walls proposed here are suitable for the implementation in a code of practice.

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