The Influence of Non-structural Exterior Wall on the Structural Resistance of RC Building Frames Against Seismic and Progressive Collapse Failure

2020 ◽  
pp. 341-351
Author(s):  
M. H. TSAI
Keyword(s):  
Progressive Collapse ◽  
Exterior Wall ◽  
Building Frames ◽  
Structural Resistance ◽  
Rc Building ◽  
Collapse Failure

scholarly journals Experimental and Theoretical Investigations on Progressive Collapse Resistance of the Concrete-Filled Square Steel Tubular Column and Steel Beam Frame under the Middle Column Failure Scenario

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Wei Xuan ◽  
Lai Wang ◽  
Changjiang Liu ◽  
Guoqi Xing ◽  
Lili Zhang ◽  
...  
Keyword(s):  
Progressive Collapse ◽  
Theoretical Models ◽  
Steel Beam ◽  
Load Path ◽  
Loading Test ◽  
Structural Resistance ◽  
Failure Scenario ◽  
Beam Frame ◽  
Collapse Process ◽  
Middle Column

A static loading test was carried out on a 1/3-scale concrete-filled square steel tubular column-steel beam frame (CFSTSBF) specimen with 2 spans to study its progressive collapse behaviors under the middle column failure scenario using the alternate load path method and to examine the failure mode and load transfer and main resistance mechanisms of the residual structure. Then, theoretical models of the specimen, involving the whole collapse process, were developed, and the resistance and deformation relationships of each model were calculated and validated with test results. The results indicated that the specimen collapse process includes the elastoplastic stage, plastic stage, transfer stage, and catenary stage, the beam mechanism and catenary mechanism were the principal mechanisms for the structure against progressive collapse, and catenary action can significantly strengthen structural resistance. The modified theoretical models with higher practical accuracy could be used to assess structural performances against progressive collapse.

Seismic behavior of multistory RC building frames with vertical setback irregularity

2013 ◽  
Vol 23 (18) ◽  
pp. 1345-1380 ◽  
Author(s):  
S. Varadharajan ◽  
V. K. Sehgal ◽  
Babita Saini
Keyword(s):  
Seismic Behavior ◽  
Building Frames ◽  
Rc Building

Progressive Collapse Analysis of a Medium-Rise Circular RC Building Against Blast Loads

2016 ◽  
Author(s):  
Yousef Al-Salloum ◽  
Tarek Almusallam ◽  
Tuan Ngo ◽  
Hussein Elsanadedy ◽  
Husain Abbas ◽  
...  
Keyword(s):  
Progressive Collapse ◽  
Model Analysis ◽  
Element Formulation ◽  
Shell Elements ◽  
Critical Elements ◽  
Beam Elements ◽  
Floor Slabs ◽  
Rc Building ◽  
Progressive Collapse Analysis ◽  
Column Bases

This paper investigates the vulnerability of a typical medium-rise circular RC building against progressive collapse as a result of blast generated waves. The building is an eight storied (including one story basement) commercial complex. The likely blast threat scenario was identified by qualitatively assessing the vulnerability of the critical elements of the structure. LS-DYNA was used for the finite element modelling of the structure. The study presents local model analysis of one of its circular columns for which fluid-structure interaction through Alternate Lagrangian Eulerian (ALE) element formulation has been employed. The concrete volume in the columns was modeled using 8-node reduced integration solid hexahedron elements. The global model analysis was carried out to examine the overall response of the structure due to the failure of one of the critical columns. The building was modeled using beam and shell elements. The 2-node axial beam elements with tension, compression, torsion, and bending capabilities were employed to represent the RC beams and columns, whereas the four node quadrilateral and three node triangular shell elements were used to represent the core wall, floor slabs, retaining walls and facade. The column bases of the building were fixed at the level of raft slab. The results of the study are proposed to be used to control or prevent progressive collapse of RC buildings.

scholarly journals Study of Seismic Response Demands of Different L-shaped Buildings

2020 ◽  
Vol 1 (1) ◽  
pp. 23-29
Author(s):  
Bharat Khanal ◽  
Hemchandra Chaulagain
Keyword(s):  
Seismic Response ◽  
Response Spectrum ◽  
Lateral Force ◽  
Mode Shapes ◽  
Building Frames ◽  
Time Period ◽  
Standard Code ◽  
Story Drift ◽  
Rc Building ◽  
Element Approach

The present study evaluates the effect of plan configuration irregularity of different L shaped models. For this, one regular and six different L-shaped RC building frames were modeled for numerical analysis. The analysis was done through an equivalent static lateral force method and response spectrum analysis (dynamic analysis). The seismic response demands were measured in terms of story displacement, inter-story drift ratio, torsional irregularity ratio, and torsional diaphragm rotation. In addition, fundamental time period of structure, vibration mode shapes and modal participating mass ratios were also studied. The study shows that the fundamental time period of structure based on standard code shows a lower value as compared to a finite element approach. It is concluded that to account for the irregularities present within the buildings, current code provisions are insufficient and should be amended.

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