Behavior of two new moment resisting precast beam to column connections subjected to lateral loading

Bahrami, Saeed; Madhkhan, Morteza; Shirmohammadi, Fatemeh; Nazemi, Nima

doi:10.1016/j.engstruct.2016.11.060

Cited by 82 publications

(30 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results satisfied all criteria of ACI T1.1-01 [15]. Bahrami et al [16] studied two new moment resisting precast connection, numerically. In this connection precast beam was connected to the precast column with corbel by use of (i) inverted Ebolted connection and (ii) by box section-welded connection.…”

Section: Introductionmentioning

confidence: 70%

Experimental and Numerical Study on Proposed T-Form Semi-Precast Moment-Resisting Concrete Connections

Fathi

parvizi

2019

Scientia Iranica

View full text Add to dashboard Cite

This paper presents the results of experimental and numerical study on a proposed exterior semi-precast moment-resisting concrete connection. Steel linkage element connects precast concrete beam to column in two cases of bolted and welded connections. These connections were compared to monolithic connection based on stiffness, strength, energy dissipation capacity and ductility factor. An accurate 3D nonlinear finite element model has been simulated to study the behavior of these connections. A good agreement was observed between numerical results and experimental ones in behavior and damage mode. Although, all samples satisfied all the code criteria, but the trend of failure in bolted and welded connection was observed on the weld and bolts area, at the connection zone between beam and steel linkage. However, in monolithic connection, the yielding was observed in rebars and crushing of concrete at the end of beam. The initial stiffness of bolted and welded connection specimen was less than that of monolithic connection specimen. But, the beam moment capacity factors of these samples were a little more than monolithic sample; so, the ductility factors of them were a little less than that of monolithic sample.

show abstract

Section: Introductionmentioning

confidence: 70%

Experimental and Numerical Study on Proposed T-Form Semi-Precast Moment-Resisting Concrete Connections

Fathi

parvizi

2019

Scientia Iranica

View full text Add to dashboard Cite

show abstract

“…• Insufficient total embedded length but sufficient elastic embedded length, In this case, the first two developing stages of the slip are the same as Eqs. (18) and (20) in case (1) since the elastic embedded length is sufficient. However, when the bar stress at the loaded end is over the yield strength (hardening), the bar can be stressed through the start point (continuous bars) or the free-end (anchored bars), consequently the elastic and plastic developed bond lengths will be…”

Section: Analytical Derivation Of the Bar Slipmentioning

confidence: 99%

“…Hawileh et al [10] developed a detailed 3D finite element model for precast hybrid beam-to-column connections subjected to cyclic loads, and surface-to-surface contact between the beam and column faces were considered in the model. Bahrami et al [18] numerically analyzed seismic performance of two new precast beam-to-column connections using ABAQUS software, covering the lateral resistance, ductility and energy dissipation of the connections. However, the analysis was also limited to monotonic loading.…”

Section: Introductionmentioning

confidence: 99%

Finite element modelling approach for precast reinforced concrete beam-to-column connections under cyclic loading

Feng

2018

Engineering Structures

View full text Add to dashboard Cite

In this paper, a finite element modelling approach is developed for the analysis of the cyclic behavior of precast beamto-column connections. In particular, the modelling takes into account the compression-softening of concrete, the bond-slip effect in the critical regions and the representation of the post-cast concrete interface. A newly developed softened damage-plasticity model, which can reproduce the typical cyclic behavior of reinforced concrete, is adopted for concrete. Meanwhile, to reflect the significant bond-slip effect between concrete and reinforcement bars, the M-P stress-strain model is modified to account for the slippage by assuming the bar strain is the sum of the bar deformation and the slip, while the anchorage slip is theoretically derived and validated through benchmarking the pull-out tests. Additionally, a concrete layer between the precast concrete and the cast-in-situ concrete is incorporated to reflect the features of the interface. The proposed numerical modelling approach is validated through simulation of both interior and exterior precast beam-to-column connection tests. The validated models are subsequently employed to investigate the influences of key factors such as the compression-softening and the bond-slip effect on the analysis of the cyclic behavior of the precast beam-to-column connections. Results demonstrate that the proposed model is capable of reproducing the typical behavior of precast beam-to-column connections and can serve as an effective tool for the seismic performance analysis and investigation of design parameters of precast connections.

show abstract

“…In the past three to four decades, most studies on precast RC structures were focused on their seismic performance. The conventional way is to conduct cyclic loading tests of the precast beam‐to‐column connections and/or develop high‐fidelity finite element models to assess the seismic performance (e.g., failure mode, cyclic behavior, and energy dissipation) of the corresponding precast structures. Nevertheless, as a new concern, progressive collapse performance of structures has attracted more and more attentions, because the unexpected accidental events, for example, malicious attacks, gas explosion, vehicle impact, and human error, were frequently happening around the world in recent years and caused great loss of human lives and public properties.…”

Section: Introductionmentioning

confidence: 99%

Progressive collapse performance analysis of precast reinforced concrete structures

Feng

Wang

2019

Structural Design Tall Build

View full text Add to dashboard Cite

In this paper, the progressive collapse performance analysis of precast reinforced concrete (RC) structures is performed. A numerical simulation framework for precast RC structures is developed on the basis of the OpenSEES software, where the fiber frame element is used for beam and column type members and Joint2D element is used for the beam-to-column connections. The conjugated material models are then introduced, and a min-max failure criterion is imposed on the original models to reflect the steel fracture and concrete crushing when the structure is undergoing progressive collapse. In addition, to overcome the computational difficulties arisen from progressive collapse behavior, two enhanced nonlinear solutions , that is, the consistent quasi-Newton algorithm and the explicit KRalgorithm, are employed, respectively, for static and dynamic analysis. A 10-storey prototype precast RC structures is designed to verify the developed numerical framework, and the progressive collapse resisting mechanism of the structures is investigated through both static pushdown analysis and dynamic column-removal analysis. Finally, influences of some typical parameters in precast RC structures on their progressive collapse performance are studied. KEYWORDScolumn removal, nonlinear analysis solution, numerical simulation, precast, progressive collapse, pushdown analysis, reinforce concrete structures INTRODUCTIONPrecast reinforced concrete (RC) structures are widely used in practical structural engineering due to its various advantages, for example, high efficiency, product quality, and low environmental pollution. Especially, in some developing countries such as China, the government has attached great importance to promote precast RC structural systems in recent years, because there exists a large demand of industrial and civilian buildings in their rapid process of urbanization. Therefore, it is of significant value to study the actual performance of the precast RC structures subjected to external loadings for better understanding the failure mechanism and developing appropriate design methods.In the past three to four decades, most studies on precast RC structures were focused on their seismic performance. The conventional way is to conduct cyclic loading tests [1,2] of the precast beam-to-column connections and/or develop high-fidelity finite element models [3,4] to assess the seismic performance (e.g., failure mode, cyclic behavior, and energy dissipation) of the corresponding precast structures. Nevertheless, as a new concern, progressive collapse performance of structures has attracted more and more attentions, [5][6][7] because the unexpected accidental events, for example, malicious attacks, gas explosion, vehicle impact, and human error, were frequently happening around the world in recent years and caused great loss of human lives and public properties. Although the probability of these extreme events is relatively small, the consequences are unbearable.The most common and effective way to assess the progressive col...

show abstract

Behavior of two new moment resisting precast beam to column connections subjected to lateral loading

Cited by 82 publications

References 13 publications

Experimental and Numerical Study on Proposed T-Form Semi-Precast Moment-Resisting Concrete Connections

Experimental and Numerical Study on Proposed T-Form Semi-Precast Moment-Resisting Concrete Connections

Finite element modelling approach for precast reinforced concrete beam-to-column connections under cyclic loading

Progressive collapse performance analysis of precast reinforced concrete structures

Contact Info

Product

Resources

About