Numerical analysis of square concrete-filled double skin steel tubular columns with rubberized concrete

Numerical analysis on torsional behavior of rectangular and square CFDST members

“…Tao et al [16] carried out axial and eccentric loading tests on circular CFDST members, based on a theoretical model and unified theory, the simplified formula was depicted to predict the compression bearing capacity of circular CFDST members. Based on the numerical model calibrated against test results, Huang et al [17], Pagoulatou et al [18], Hassanein et al [19] [20], Ayough et al [21] [22] and Ahmed et al [23] conducted numerical analyses and proposed design formulas to predict the compression bearing capacity of CFDST members respectively. Uenaka et al [24][25] carried out test studies to research the compression bearing capacity of two section types of CFDST stud members and proposed simplified formula to calculate the compression bearing capacity of these members.…”

Axial and bending behaviour of steel tubes infilled with rubberised concrete

“…The use of recycled rubber particles as partial replacements of both coarse and fine aggregates in concrete is considered a sustainable solution to reduce the detrimental impact of rubber waste on the environment [1][2][3]. RuC can be an efficient alternative to conventional concrete materials (CCM) for some applications, although RuC is characterised by a low elastic modulus, compressive capacity and tensile strength in comparison with CCM [4][5][6][7][8]. Rubberised concrete (RuC) has the potential for being used in structural applications and has good performance in terms of ductility, energy dissipation, durability, and sound insulation [9][10][11].…”

“…Large-scale circular reinforced concrete columns with up to 60% rubber particles as a replacement for mineral aggregates had improved performance with lower load carrying capacity and elastic modulus in comparison to CCM counterparts [1]. To address this issue, recent investigations pointed out that confinement is a feasible method to enhance the mechanical properties of RuC [1,3,7,8,[12][13][14][15][16][17][18]. Lateral confinement can recover the elastic modulus and strength loss due to the rubber.…”

“…Most investigated RuCFST structural configurations were typically in axial compression and incorporating concrete with rubber replacement of up to 30%. RuCFST sections combine the benefits of both RuC and steel hollow sections and have potentially improved structural performance in compression, for both capacity and deformation [12][13][14][15][16][17][18][19][20]. Studies into the confinement level of RuCFST members subjected to axial loading indicated that an increased confinement level is produced by high rubber replacement in circular sections compared with relatively lower rubber contents [3].…”

“…Studies into the confinement level of RuCFST members subjected to axial loading indicated that an increased confinement level is produced by high rubber replacement in circular sections compared with relatively lower rubber contents [3]. Previous numerical studies on RuCFST members focused on relatively low rubber replacements and included models for either pure axial compression or bending loading [8,[19][20][21]. More recent numerical studies considering the cyclic behaviour of short RuCFST with square Reference concrete axial strain at crushing 𝜀 crush…”