Experimental Study on Transverse Connection Method of the NSTS Structure

doi:10.12068/j.issn.1005-3026.2019.07.021

Abstract

Abstract: A new steel tube slab(NSTS) structure using small-sized steel tubes as transverse connections was presented in order to ease the construction difficulty and enhance the transverse stiffness and the bearing capacity of the NSTS. Small-sized steel tubes were arranged between the longitudinal steel tubes in transverse direction， forming a composite structure of concrete-filled steel tube after concreting the longitudinal and transverse steel tubes. The connection methods between the transverse tube and the longitudinal tube were studied by analyzing the mechanical behavior of NSTS members. The results indicate that the bearing capacity of the specimen connected by bolts+T-shaped steel plate， and only by bolts is increased by 58.4% and 51.2% respectively， compared with that connected only by T-shaped steel plate， and the stiffness is increased by 123.3% and 97.5%， respectively. The connection method of bolts+T-shaped steel plate is most favorable to the mechanical behavior of the NSTS members. The concrete strength affects the stiffness and deflection of the specimen， but has little impact on the bearing capacity.

Key words: NSTS structure, concrete-filled steel tube, connection method, mechanical behavior, experimental study

CLC Number:

TU317⁺.1

LI Xue， WANG Lian-guang， YANG Jia. Experimental Study on Transverse Connection Method of the NSTS Structure[J]. Journal of Northeastern University Natural Science, 2019, 40(7): 1028-1033.

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