Concrete Filled Steel Tube Columns Under Earthquake Loads

1987 code of practice for design loads.

Concrete filled steel tube columns under earthquake loads.

A simplified design model was developed for predicting the strength capacity of columns under full and local compression loads. The experimental data were used to determine various failure modes bearing capacities and load displacement curves. 2016 comparative performance evaluation of steel column building concrete filled tube column building under static and dynamic loading procedia engineering 173 2017 1847 1853. Ten l t cfsst columns were tested to failure under axial load.

10 in their five years of research on axially loaded concrete filled steel tube columns said that the difference between the ultimate capacity and nominal squash load of a. Keywords composite column concrete filled steel tubular. Horizontal load displacement curves of first load cycle. Kenji sakino et al.

Design model for concrete filled steel tube columns under full and local compression loads open pdf. Request pdf concrete filled steel tube columns under earthquake loads concrete filled steel tubes cfts have been used throughout the world in structures of varying heights and structural. For example under 35 kg tnt blast load a residual load bearing index of 71 is found on the column with 38 mpa concrete while the ratio reduces to 61 on the column with 70 mpa concrete. Under the same axial compression ratio the applied axial compression loads for columns with thicker tubes are larger due to their greater bearing capacities.

Experimental and analytical evaluation of concrete filled crisscross steel tubular columns subjected to earthquake loads. In modern high rise buildings and long span bridges concrete filled steel tube cfst columns are being widely used due to the advantages compared with conventional reinforced concrete columns including rapid construction excellent static and earthquake resistant properties a large number of literatures were available about the mechanical behavior of cfst columns under axial force and bending moment and reviewed by gourley et al. Experimental study on ultimate strength and ductility of concrete filled steel columns under strong earthquake. Proceedings of the institution of civil engineers.

Outer steel cross section from the local buckling by the inner concrete. Han schneider etc. Under the same pre damage degree as the thickness of steel tube increases the bearing capacity of cfst column increases and the fire resistance time of concrete filled steel tube decreases. Is 875 part 3.

This is because the damage to the steel skin is about the same under the same level of blasting load irrespective of the core concrete strength. Columns composite structures steel structures. The test parameters included the section form steel tube thickness.