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Design Of Concrete-Filled Circular Steel Tubes Under Lateral Impact, Yaohua Deng, Christopher Tuan
Design Of Concrete-Filled Circular Steel Tubes Under Lateral Impact, Yaohua Deng, Christopher Tuan
Christopher Y. Tuan
Infrastructures and key members are potentially exposed to accidental loads due to extreme situations such as collisions, impacts, and terrorist bombings. Consequently, the current design concept requires that the structures or key members possess adequate capacities to resist accidental loads. To understand the mechanical response of concrete-filled steel tube (CFT) beams subjected to impact loads, this paper presents numerical simulations on the CFT beam tests in an instrumented drop-weight impact facility using finite element code LS-DYNA. The adequacy of finite element modeling (FEM) has been validated against drop-hammer impact tests in the literature. Based on the dynamic increase factors (DIFs) …
Flexural Strength Analysis Of Non-Post-Tensioned And Post-Tensioned Concrete-Filled Circular Steel Tubes, Yaohua Deng, Christopher Tuan, Q. Zhou, Y. Xiao
Flexural Strength Analysis Of Non-Post-Tensioned And Post-Tensioned Concrete-Filled Circular Steel Tubes, Yaohua Deng, Christopher Tuan, Q. Zhou, Y. Xiao
Christopher Y. Tuan
Concrete-filled circular steel tubes (CFT) have recently gained significant attention for their enhanced strength and ductility over the conventional steel and reinforced concrete construction. The concrete compressive strength is significantly increased by the lateral confinement provided by the steel tube and local buckling of the steel tube is restrained by the concrete infill. This paper investigates the further enhancement of these composite actions due to post-tensioning the concrete cores inside circular steel tubes. The flexural behavior of a post-tensioned CFT as well as a non-post-tensioned CFT was studied experimentally and analytically. A numerical algorithm for predicting the moment capacities of …