scholarly journals Dynamic analysis of high-strength concrete frame buildings for progressive collapse

2020 ◽  
Vol 13 ◽  
pp. e00470
Author(s):  
Ahmed M. Yousef ◽  
Mahmoud A. El-Mandouh
Keyword(s):  
Dynamic Analysis ◽  
High Strength Concrete ◽  
Progressive Collapse ◽  
High Strength ◽  
Strength Concrete ◽  
Concrete Frame ◽  
Frame Buildings

scholarly journals Seismic Behavior Analysis of Damaged Steel Fiber-Reinforced High-Strength Concrete Frame Joints Strengthened by FRP

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Wang Tingyan ◽  
Zhou Yun ◽  
Zhang Junwei
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
High Strength Concrete ◽  
Seismic Behavior ◽  
Steel Fiber ◽  
High Strength ◽  
Fiber Reinforced ◽  
Strength Concrete ◽  
Concrete Frame ◽  
Capacity Degradation

In this paper, the seismic behavior of fiber-reinforced polymer (FRP) strengthened and unstrengthened steel fiber-reinforced high-strength concrete frame joints under low cyclic loading was tested. Then, the nonlinear finite element program was used to simulate the seismic behavior of FRP strengthened and unstrengthened steel fiber-reinforced high-strength concrete frame joints under low cyclic repeated load. The influence of FRP bond direction on the seismic behavior of steel fiber-reinforced high-strength concrete frame joints was studied. Through the comparison of the test values and numerical simulation values of the hysteretic curve, skeleton curve, energy dissipation capacity, displacement ductility, bearing capacity degradation, stiffness degradation, and other performance indexes of frame joints, the rule was obtained. The results showed that the 45° bonding direction of carbon fiber cloth is better than the 0° bonding direction, and the digital simulation results are in good agreement with the test results. Therefore, the constitutive model, element, end constraint, and loading method used in the finite element numerical simulation of this paper were reasonable, which can provide reference for the similar research in the future.

The Strain Change Rules of Full-Scale High Strength Concrete Frame Columns with High Axial Compression Rations

2014 ◽  
Vol 919-921 ◽  
pp. 288-291
Author(s):  
Guo Jun Zhang ◽  
Yong Bin Jia ◽  
Xi Lin Lu
Keyword(s):  
Axial Compression ◽  
High Strength Concrete ◽  
Tensile Strain ◽  
High Strength ◽  
Full Scale ◽  
Longitudinal Reinforcement ◽  
Strength Concrete ◽  
Concrete Frame ◽  
Strain Change ◽  
Maximum Tensile Strain

Based on experimental study of 9 full-scale high-strength concrete(HSC) rectangular frame columns with high axial compression ratios, high-strength longitudinal reinforcements and transverse reinforcements and rectangular interlocking ties, their strain change rules of longitudinal reinforcement, stirrups and concrete were discussed and analyzed. The main results indicate as follows. The maximum tensile strain of longitudinal reinforcement decrease and the tensile strain of concrete increase quickly as the axial compression ratios and the strength grades of concrete are higher; the strains of outer stirrups are all the time greater than those of inner stirrups; the single brace stirrups have the same action with the closed stirrups.

Study on Resilience Model of High-Strength Concrete Frame Columns

2014 ◽  
Vol 919-921 ◽  
pp. 969-972
Author(s):  
Guo Jun Zhang ◽  
Xi Lin Lu ◽  
Bo Quan Liu
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Concrete Frame

Based on the horizontaldisplacements and loads of column at top end deduced according to sectionalbalanceable conditions at yield of high-strength frame columns, the lateralmaximum loads of column at top end calculated according to the Chinese currentconcrete code and involved regressive formulas, the resilience model ofhigh-strength concrete frame columns were established. The main results show:the resilience models of high-strength concrete frame columns proposed in thispaper consider influenced multi-facts and conveniently applied to engineering.

The Seismic Behavior of High-Strength Concrete Frame Joints

2012 ◽  
Vol 238 ◽  
pp. 838-843 ◽  
Author(s):  
Ting Yan Wang ◽  
Jun Wei Zhang ◽  
Dan Ying Gao
Keyword(s):  
High Strength Concrete ◽  
Seismic Behavior ◽  
Steel Fiber ◽  
High Strength ◽  
Element Analysis ◽  
Strength Concrete ◽  
Concrete Frame ◽  
Loading Method ◽  
Reversed Loading ◽  
Joint Core Area

By studying the two high-strength concrete frame joints by means of experimental investigate and finite element analysis with the low cycle reversed loading method, it discussed the influence of the steel fiber on the seismic behavior of the high-strength frame joints. The result shows that, mixed with steel fiber can enhance the constraint of the concrete at the joint core area, improve the seismic behavior. Amount of steel fiber can replace part of the stirrup.

Calculation Methods on Crack Resistance Capacity of SRUHSC Column to SRC Beam Joint Subjected to Reversal Cycle Load

2010 ◽  
Vol 152-153 ◽  
pp. 1835-1838
Author(s):  
Ju Zhang ◽  
Chang Wang Yan ◽  
Jin Qing Jia
Keyword(s):  
Crack Resistance ◽  
High Strength Concrete ◽  
High Strength ◽  
Test Results ◽  
Steel Reinforced Concrete ◽  
Strength Concrete ◽  
Concrete Frame ◽  
Seismic Area ◽  
Resistance Performance ◽  
Good Agreement

In the joint core regions of steel reinforced ultra high strength concrete frame, the forces are complicated. In seismic area or under some exceptional conditions, it is difficult to repair for joint when cracks occur, so crack resistance performance is important. Based on the experiment of steel reinforced ultra high strength concrete (SRUHSC) column to steel reinforced concrete (SRC) beam joint subjected to reversal cycle load, the crack resistance capacity is studied and applied calculation method for crack resistance capacity is proposed. Compared with the test results, the calculated results are in good agreement with them.

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