Cyclic Tests and Simulations of Spatial RC Frame-Shear Wall Structures

2010 ◽  
Vol 163-167 ◽  
pp. 1569-1573 ◽  
Author(s):  
Shi Xiang Huang ◽  
Xin Yu Zhao
Keyword(s):  
Numerical Simulations ◽  
Failure Modes ◽  
Three Dimensional ◽  
Shear Wall ◽  
Rc Frame ◽  
Test Results ◽  
Cyclic Tests ◽  
Base Shear ◽  
Finite Element Program ◽  
Wall Structures

The cyclic tests of three one-storey spatial RC frame-shear wall structures with slabs were conducted to investigate the failure modes and the base shear-floor displacement hysteretic responses of the model structures. Then three dimensional numerical simulations were performed using the finite element program ABAQUS/Standard and ABAQUS/Explicit. The test results are detailed in this paper and compared to those of the numerical simulations. It is shown that: (a) plastic hinges initiated at the bottom of the shear wall and followed by forming near the upper ends of columns, resulting in wall-column hinges side-sway failure mechanism; (b) to a certain extent, the horizontal force bearing capacity of the structure increases with the increasing of the vertical load; (c) it is verified that the pushover results of both ABAQUS/Standard and ABAQUS/Explicit solutions agree well with the test results in the case that the parameters are reasonably chosen.

Shaking Table Test of RC Frame-Shear Wall Structures with Partial Columns Sliding at Upper Ends

2013 ◽  
Vol 405-408 ◽  
pp. 795-798
Author(s):  
Wen Long Lu ◽  
Chao Yong Shen
Keyword(s):  
Shear Force ◽  
Shaking Table Test ◽  
Shear Wall ◽  
Shaking Table ◽  
Wall Structure ◽  
Rc Frame ◽  
Structure Model ◽  
Test Results ◽  
Wall Structures ◽  
Member Size

A new kind of RC frame-shear wall structures with partial columns sliding at upper ends is proposed in this paper. A shaking table test of this new kind of structure model (Model B) and a conventional frame shear-wall structure Model (Model A) were carried out, and the plan layout and the member size of the two models are nearly identical. The two models are 3-story and 2-bay by 2-bay, and the second story of either structure is weak story. The test results showed that: (1) under the same intense earthquake, the damage of Model B is slighter than that of Model A; and (2) under the same intense earthquake, the interstory drift angle, the acceleration and the shear force of weak story of Model B are reduced remarkably in comparison to Model A.

Pseudodynamic Test of a Deficient RC Frame Strengthened with Buckling Restrained Braces

2019 ◽  
Vol 35 (3) ◽  
pp. 1163-1187 ◽  
Author(s):  
Ramazan Ozcelik ◽  
Elif Firuze Erdil
Keyword(s):  
Time History ◽  
Shear Capacity ◽  
Test Method ◽  
Nonlinear Time History Analysis ◽  
Rc Frame ◽  
Test Results ◽  
Base Shear ◽  
Braced Frame ◽  
Pseudodynamic Test ◽  
Buckling Restrained Braces

Three story–three bay reinforced concrete (RC) frames with and without chevron braces were tested using the continuous pseudodynamic test method. New steel–concrete composite lateral load–carrying members called Buckling Restrained Braces (BRBs) were used as chevron brace members while retrofitting the RC frame. The BRBs were fitted to the interior span of the RC frame by using anchorage rods. The chevron braced frame was observed to be effective in controlling interstory drift. The test results indicated that retrofitting with BRBs was beneficial in resisting deformation without significant damage under simulated ground motions. Furthermore, significant yielding that occurred on the core plate of the BRBs enabled the braced frame to dissipate energy induced by dynamic loading. The test results were compared with the results of the nonlinear time-history analysis. The analysis results were capable of estimating the base shear capacity and displacement demands with reasonable accuracy.

Nonlinear Dynamic Analysis of Prefabricated Concrete Shear Wall Structure under Seismic Excitation

2017 ◽  
Vol 873 ◽  
pp. 259-263
Author(s):  
Hao Zhang ◽  
Zi Hang Zhang ◽  
Yong Qiang Li
Keyword(s):  
Finite Element ◽  
Kinematic Hardening ◽  
Nonlinear Dynamic Analysis ◽  
Shear Wall ◽  
Seismic Excitation ◽  
Wall Structure ◽  
Base Shear ◽  
Wall Structures ◽  
Story Drift

The dynamic behavior of the prefabricated and cast in situ concrete shear wall structures subjected to seismic loading is investigated by finite element method. This paper adopted a prefabricated concrete shear wall in a practical engineering. The Precise finite element models of prefabricated and cast in situ concrete shear wall were established respectively by ABAQUS. The damaged plasticity model of concrete and kinematic hardening model of reinforcing steel were used. The top displacement, top acceleration, story drift ratio and base shear forceof prefabricated and cast in situ concrete shear wall under different seismic excitation were compared and analyzed. The earthquake resistant behaviorsof the two kinds of structuresare analyzed and compared. Results show that the performances of PC structure were equal to the cast-in-situ ones.

Inelastic analysis of a reinforced concrete shear wall building according to the National Building Code of Canada 2005

2006 ◽  
Vol 33 (7) ◽  
pp. 854-871 ◽  
Author(s):  
M Panneton ◽  
P Léger ◽  
R Tremblay
Keyword(s):  
Reinforced Concrete ◽  
Three Dimensional ◽  
Time History ◽  
Shear Walls ◽  
Shear Wall ◽  
Fundamental Period ◽  
Building Code ◽  
Base Shear ◽  
Inelastic Analysis ◽  
The Impact

An eight-storey reinforced concrete shear wall building located in Montréal and designed according to the 1995 National Building Code of Canada (NBCC) and the Canadian Standards Association standard CSA-A23.3-94 is studied to evaluate the impact of new requirements for inclusion in new editions of the NBCC and CSA-A23.3. Static and modal analyses were conducted according to the 2005 NBCC (draft 2003) and CSA-A23.3-04 (draft 4) procedures, and three-dimensional dynamic inelastic time history analysis was performed using three earthquake records. The building is braced by four flat shear walls and three cores. Various estimates of the fundamental period of vibration based on empirical expressions presented in the literature or structural models with different stiffness assumptions were examined. The analysis also permitted the study of the displacement and force demand on the lateral load resisting system. It was found that the base shear from the 2005 NBCC is 29% higher than the 1995 NBCC value when code empirical formulae are used for the fundamental period of vibration.Key words: building, shear wall, inelastic seismic response, NBCC, CSA-A23.3 design of concrete structures.

Seismic Testing of the Connecting Joint in a Buckling-Restrained K-Braced RC Frame

2018 ◽  
Vol 763 ◽  
pp. 354-360
Author(s):  
An Chien Wu ◽  
Keh Chyuan Tsai ◽  
Ting Li Lin
Keyword(s):  
Nonlinear Response ◽  
Model Building ◽  
Rc Frame ◽  
Test Results ◽  
Base Shear ◽  
Story Drift ◽  
Rc Building ◽  
Column Joint ◽  
Force Components ◽  
Loading Procedure

In this study, a 12-story reinforced concrete (RC) building with buckling-restrained braces (BRBs) arranged in a zigzag configuration is proposed as a prototype building. The beam-column joint at the tenth floor selected as the sub-assemblage specimen and its details including the BRB gusset bracket and RC corbels were designed following the model building codes. The full-scale sub-assemblage of the structural system was tested using cyclic loading procedure. Test results show that the proposed BRB-to-RC connection details performed very well without failure in the steel gusset bracket or the RC corbels. In order to further study the seismic performance of the 12-story buckling-restrained braced RC frame, nonlinear response history analyses are conducted using a total of 240 (SLE, DBE and MCE) ground accelerations. Analysis results indicate that the maximum ratios of total BRB shear to base shear are about 23% (SLE), 21% (DBE) and 19% (MCE). The maximum inter-story drift ratios under MCE and DBE events are 2.32% and 1.82%, respectively. Analysis results also suggest that the high mode effect is not significant. It is found that the peak demand of the horizontal tension force on the steel gusset bracket can be estimated by considering 70% of the sum of the two horizontal force components computed from the two adjacent BRB maximum tension strengths.

scholarly journals Effect of Loading Speed on the Mechanical Properties of Nail Joints

2019 ◽  
pp. 462-470
Author(s):  
Shervin Shameli Derakshan ◽  
Lina Zhou ◽  
Chun Ni
Keyword(s):  
Mechanical Properties ◽  
Failure Modes ◽  
Shear Walls ◽  
Experimental Tests ◽  
Cyclic Loads ◽  
Test Results ◽  
Cyclic Tests ◽  
Frame Buildings ◽  
Wood Frame ◽  
Reversed Cyclic

Wood shear walls are the main lateral load resisting systems in light wood frame buildings to resist the wind and seismic loads. Sheathing to lumber nail connections are regarded as the key components that control the resistance and failure modes of wood shear walls. Considerable experimental tests have been conducted on performance of nail joints or wood shear walls under both static and reversed cyclic loads. However, these tests were usually conducted under different loading speed causing specimen failure in 1 min to an hour. It is unclear how the loading speed will affect the test results of nail joints or wood shear walls. Research on these topics is limited. This paper aims to evaluate the effect of loading speed on the mechanical characteristics of nail joints. 72 specimens have been tested under various loading speeds, ranging from 0.05 mm/s to 0.5 mm/s for monotonic tests and 1.5 mm/s to 15 mm/s for reversed cyclic tests. The range of loading speed was selected based on the total estimated loading time that both monotonic and reversed cyclic tests fail within around 1 min to 10 min. Two groups of nail joints, comprising two common nail sizes and two sheathing thicknesses, were assessed under both monotonic and reversed cyclic loads. From the test results, the effect of loading speed on the mechanical properties of nail joints was determined.

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