An improved tie force method for progressive collapse resistance design of reinforced concrete frame structures

Abstract

This paper relates to the development of a method for the total automation and site robotisation of the concrete frame production process on real world, non-standardised, commercial building structures. The proposed method uses currently available technology and is an improvement on the highly successful Progressive Strength System developed in Australia in the 1970's to produce many major office buildings and other structures. This paper reviews the PS system from a technical and economic point of view and then indicates how the original production process can be improved using modern automation concepts to produce a totally automated site production process that is undoubtedly cheaper, faster and safer in real terms than the current orthodox production process.

Experimental study and numerical analysis of progressive collapse resistance of composite frames

“…The model displayed the overall behavior of the 20-storey building under a sudden loss of column and provided important information for the additional design guidance on progressive collapse. Li et al [22] improved the current Tie Force (TF) method to take into account the important factors such as the load redistribution in three dimensions, dynamic effects and internal force correction. Iribarren et al [23] investigated the influence of design and material parameters in the progressive collapse analysis of RC structures including reinforcement ratio and column removal time.…”

Progressive Collapse Resistance of RC Frames under a Side Column Removal Scenario: The Mechanism Explained

“…The model was originally proposed by Li et al (2011), and the reliability was verified by Hou and Yang (2014).…”

Progressive Collapse Fragility Models of Rc Framed Buildings Based on Pushdown Analysis

“…2 shows isometric and plan views of a representative building model used for damage analysis through distributed-plasticity approach and pushdown simulation techniques. While high-definition solid FE models based on classical principles of nonlinear fracture mechanics [53][54][55] represent an attractive solution for interpreting the evolution of crack patterns and damage mechanisms of RC structures at a local level [25,33,34], fiber-based idealizations were shown to be a transparent and viable approach to accurately characterize the inelastic response of such building typology in a computationally efficient manner [32]. To this aim, the open FE platform SeismoStruct [56] was adopted to prepare 2D and 3D models of EC2-compliant and EC8-compliant structures and to play out the series of pushdown analyses explicitly including material and geometric nonlinearities.…”

“…Besides direct and indirect design provisions prescribed in codes and standards [13][14][15][16], a huge amount of analytical studies on blast and progressive collapse phenomena have been done [11,12,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], thus quantifying the influence of modeling assumptions and analysis techniques. Solid or shell FE [25,28,33,34], lumped-plasticity [18, 22-24, 26, 27] and spread-plasticity [11,12,17,19,25,[29][30][31][32]35] approaches have been examined for progressive collapse analysis of different building typologies ranging from civilian to strategic and military facilities. In this respect, conventional or alternative pushdown procedures and implicit or explicit nonlinear dynamic analyses have been explored using general purpose codes or open platforms.…”