Response of Reinforced Concrete Buildings in Concepción during the Maule Earthquake

2012 ◽  
Vol 28 (1_suppl1) ◽  
pp. 257-280 ◽  
Author(s):  
Benjamín Westenenk ◽  
Juan Carlos de la Llera ◽  
Juan José Besa ◽  
Rosita Jünemann ◽  
Jack Moehle ◽  
...  
Keyword(s):  
Shear Failure ◽  
Vertical Wall ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Force ◽  
Field Observations ◽  
Severe Damage ◽  
Repetitive Nature ◽  
Chile Earthquake ◽  
Maule Earthquake

Detailed observations are reported for eight shear wall buildings from the Concepción region that experienced severe damage during the 27 February 2010 Chile earthquake. The repetitive nature of some of the damage suggests that these field observations may be applicable to similar buildings elsewhere, whereas other damage may be unique. Several shear walls experienced failures that apparently started at the boundaries due to the high compression in these unconfined edges, and propagated into the wall web. Other walls, including horizontal and vertical wall segments in perforated walls, experienced shear failure. Damage also was observed in columns, beams, and coupling slabs. In most cases, the percentage of damaged elements was less than 10% of the lateral force-resisting elements of the building, suggesting that these structures were not capable of distributing damage. Several building indices are calculated, including vibration periods and regularity indices, for comparison with observed behavior.

SEISMIC LATERAL FORCE DISTRIBUTION FOR DUCTILITY-BASED DESIGN OF STEEL PLATE SHEAR WALLS

2012 ◽  
Vol 06 (01) ◽  
pp. 1250004 ◽  
Author(s):  
SWAPNIL B. KHARMALE ◽  
SIDDHARTHA GHOSH
Keyword(s):  
Steel Plate ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Force ◽  
Performance Based Design ◽  
Force Distribution ◽  
Steel Plate Shear Walls ◽  
Steel Plate Shear Wall ◽  
Design Requirements ◽  
Ductility Ratio

The thin unstiffened steel plate shear wall (SPSW) system has now emerged as a promising lateral load resisting system. Considering performance-based design requirements, a ductility-based design was recently proposed for SPSW systems. It was felt that a detailed and closer look into the aspect of seismic lateral force distribution was necessary in this method. An investigation toward finding a suitable lateral force distribution for ductility-based design of SPSW is presented in this paper. The investigation is based on trial designs for a variety of scenarios where five common lateral force distributions are considered. The effectiveness of an assumed trial distribution is measured primarily on the basis of how closely the design achieves the target ductility ratio, which is measured in terms of the roof displacement. All trial distributions are found to be almost equally effective. Therefore, the use of any commonly adopted lateral force distribution is recommended for plastic design of SPSW systems.

Experimental Study on Behavior of Shear Walls Built with Precast Two-way Hollow Slabs for Different Axial-Load Ratios

2013 ◽  
Vol 351-352 ◽  
pp. 833-837
Author(s):  
Ji Liang Liu ◽  
Hui Chen Cui ◽  
Ming Jin Chu ◽  
Jian Qun Hou
Keyword(s):  
Shear Failure ◽  
Precast Concrete ◽  
Failure Process ◽  
Compressive Load ◽  
Shear Walls ◽  
Shear Wall ◽  
Shear Capacity ◽  
Lateral Loads ◽  
Compression Load ◽  
New Type

The shear wall built with precast two-way hollow slab is an innovated precast concrete shear wall suitable for housing industrialization. Two shear walls built with precast two-way hollow slabs were tested pseudo-statically under low cyclic lateral loads to acquire their failure process and modes. The effect of the axial compression load was investigated. The study proved that vertical cracks along the vertical holes of the new type shear wall have been appeared to avoid brittle shear failure, and the shear wall developed integral section wall to walls-columns combination. As the results, the shear walls have the adequate deformability. The test results showed that with the increase of axial compressive ratio, crack development has been limited and the energy dissipation capacity has been improved. It also can be found that with the increase of the axial compressive load, shear capacity of the new type shear walls have been improved.

scholarly journals Perusal of Multi Storey Light Frame Shear Wall by Manual Check and Finite Element Method

2019 ◽  
Vol 8 (6) ◽  
pp. 569-574
Keyword(s):  
Seismic Analysis ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Force ◽  
Seismic Loads ◽  
Lateral Loads ◽  
Structural System ◽  
Reinforced Masonry ◽  
Paper Work ◽  
Made In

Shear walls are a structural system which gives solidness or stability to structures from lateral loads like wind, seismic loads. The structural systems are fabricated by reinforced concrete, plywood/timber unreinforced, reinforced masonry at which these systems are subdivided into coupled shear walls, shear wall frames, shear panels and staggered walls. The present paper work was made in the interest of studying and analysis of various research works involved in enhancement of shear walls and their behaviour towards lateral loads. In SAP2000 analysis we found that when we apply lateral force between the stories the amount of compression and tension force between the stories obtained is equal to the manual analysis .In STAAD.PRO, we analyzed the light frame shear wall for seismic analysis. The estimated results for light frame shear wall with one storey, shear wall with two storey and shear wall with three storey shown similar to the results which are obtained by using FEM software like STAAD and SAP2000.

scholarly journals Experimental Study on Assembled Monolithic Concrete Shear Walls Built with Precast Two-Way Hollow Slabs

2014 ◽  
Vol 8 (1) ◽  
pp. 161-165 ◽  
Author(s):  
Zhijuan Sun ◽  
Yukun Mao ◽  
Jiliang Liu ◽  
Qinyan Zhao ◽  
Mingjin Chu
Keyword(s):  
Shear Failure ◽  
Precast Concrete ◽  
Shear Walls ◽  
Shear Wall ◽  
Shear Capacity ◽  
Property A ◽  
Joint Force ◽  
Vertical Reinforcement ◽  
New Type ◽  
Vertical Joint

Assembled shear wall built with precast two-way hollow slab is a new-typed shear wall built with precast concrete. In order to study its mechanical property, a quasi-static experiment is conducted with 1 reinforced concrete shear wall and 2 new type shear walls as the study objects. It was found that the internal and vertical joints of the wall body were vulnerable parts so that the new-typed shear wall experienced the loading process from the whole wall to the portioned wall. So, brittle shear failure can be avoided, deformability and anti-collapse performance are greatly improved, and shear capacity of wall body is reduced. The new-typed shear wall is reasonably structured, with convenient and reliable horizontal and vertical reinforcement, which leads to satisfactory vertical joint force-bearing capacity. Thus, it can be applied in practical construction.

scholarly journals The Collapse of the Alto Río Building during the 27 February 2010 Maule, Chile, Earthquake

2012 ◽  
Vol 28 (1_suppl1) ◽  
pp. 301-334 ◽  
Author(s):  
Cheng Song ◽  
Santiago Pujol ◽  
Andrés Lepage
Keyword(s):  
Reinforced Concrete ◽  
Building Code ◽  
Field Observations ◽  
Structural Walls ◽  
Floor Area ◽  
Chile Earthquake ◽  
Maule Earthquake ◽  
2010 Maule Earthquake ◽  
Story Building

The Alto Río Building, a 15-story building located in Concepción, Chile, collapsed during the 2010 Maule earthquake. Construction of the building was completed in 2009 following the Chilean building code of 1996. The building was provided with reinforced concrete structural walls (occupying nearly 7% of the floor area) to resist lateral and vertical loads. The walls failed in the first story, causing the overturning of the entire building. This paper provides detailed field observations and discusses plausible causes of the collapse.

Performance of reinforced concrete buildings during the 27 February 2010 Maule (Chile) earthquake

2013 ◽  
Vol 40 (8) ◽  
pp. 693-710 ◽  
Author(s):  
Murat Saatcioglu ◽  
Dan Palermo ◽  
Ahmed Ghobarah ◽  
Denis Mitchell ◽  
Rob Simpson ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Structural Damage ◽  
Vertical Wall ◽  
Shear Walls ◽  
Poor Performance ◽  
Reinforced Concrete Buildings ◽  
Concrete Buildings ◽  
Concrete Frame ◽  
Maule Earthquake ◽  
Observed Damage

The paper presents observed damage in reinforced concrete buildings during the 27 February 2010 Maule earthquake in Chile. Performance of concrete frame and shear wall buildings are discussed with emphasis on seismic deficiencies in design and construction practices. It is shown that the majority of structural damage in multistorey and high-rise buildings can be attributed to poor performance of slender shear walls, without confined boundary elements, suffering from crushing of concrete and buckling of vertical wall reinforcement. Use of irregular buildings, lack of seismic detailing, and the interference of nonstructural elements were commonly observed seismic deficiencies. A comparison is made between Chilean and Canadian design practices with references made to the applicable code clauses. Lessons are drawn from the observed structural performance.

Verification of Adjustment Method of Design Seismic Shear Force of the Frame in RC Frame-Shear Wall Structure

2010 ◽  
Vol 163-167 ◽  
pp. 1736-1743
Author(s):  
Jun Han ◽  
Ying Min Li ◽  
Wei Xian Chen ◽  
Wei Jiang ◽  
Wei Zhao
Keyword(s):  
Shear Force ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Force ◽  
Internal Force ◽  
Wall Structure ◽  
Analysis Model ◽  
Reinforced Concrete Frame ◽  
Force System ◽  
Earthquake Force

Reinforced concrete frame-shear wall structure is a double resistance to lateral force system, in which the frames and shear walls work cooperatively and the distributive rule of the earthquake force varies with different earthquake actions. To ensure the frames bear the increasing earthquake shear force and play a role of second defense line due to the internal force re-distribution after the stiffness degradation of shear walls, the elastic design earthquake shear force of the frames should be adjusted. However the adjustment measures applied in Chinese code are proposed according to the design experiences of engineers and lack of the theoretical and computational analytical basis. Moreover, there is a dispute about ignoring the rule of the shear force redistribution along storey or not, it is necessary to further evaluate the rationality of the measures in the code. In this paper, based on a 3-D precise nonlinear frame-shear wall structure analysis model, the re-distributive rule of the internal force under strong earthquake was studied and the adjustment measures of earthquake force in the frames were checked. Finally, some design suggestions were proposed.

Study on Improvement for Seismic Behavior of Reinforced Concrete Shear Walls

2011 ◽  
Vol 368-373 ◽  
pp. 1396-1401
Author(s):  
Ming Jin Chu ◽  
Peng Feng ◽  
Lie Ping Ye
Keyword(s):  
Seismic Performance ◽  
Shear Failure ◽  
Plastic Hinge ◽  
Shear Walls ◽  
Shear Wall ◽  
Structural Elements ◽  
Wall Structures ◽  
Damage Process ◽  
Energy Dissipation Capacity ◽  
Large Earthquakes

Shear walls are commonly used as structural elements to resist earthquake. The seismic performance of shear wall can be guaranteed under small earthquakes, but problems exist when it is subjected to large earthquakes. To improve the ductility and energy dissipation capacity of shear walls in large earthquakes, shear failure must be avoided and the performance of plastic hinge region must be improved. The adaptive-slit shear walls (ASSW) is proposed in this paper The mechanical characteristics of ASSW satisfy the requirements of structures under different seismic level. Therefore the damage process of ASSW can be controlled and the ductile shear failure can be realized, which obviously improve the seismic performance of shear wall structures.

The Statement of Research Progress in Embedded Steel Plate Shear Wall

2014 ◽  
Vol 638-640 ◽  
pp. 287-291
Author(s):  
Hai Xia Zhang ◽  
Qi Peng ◽  
Li Xuan Zhao
Keyword(s):  
Steel Plate ◽  
Rapid Development ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Force ◽  
Research Progress ◽  
Steel Plate Shear Wall ◽  
High Rise ◽  
Main Component ◽  
Stiffened Steel

Shear wall is the main component that resists the lateral force for high-rise buildings. With the rapid development of high-rise buildings, especially the super high-rise buildings, requirements for seismic performance of shear walls have become more sophisticated. This introduction summarizes the commonly used in embedded development and existing problems of steel plate shear wall, which are stiffened steel plate shear wall, non-stiffened steel plate shear wall, composite steel plate shear wall, preventing buckling of steel plate shear wall and low yield point steel plate shear wall.

Experimental Study on Mechanical Behaviors of Precast Concrete Shear Wall with Vertical Joint

2014 ◽  
Vol 584-586 ◽  
pp. 1299-1303 ◽  
Author(s):  
Qin Yan Zhao ◽  
Zhong Yong Zhang ◽  
Guang Ming Qiu ◽  
Ji Liang Liu ◽  
Ming Jin Chu
Keyword(s):  
Shear Failure ◽  
Precast Concrete ◽  
Failure Process ◽  
Peak Load ◽  
Shear Walls ◽  
Shear Wall ◽  
Failure Behavior ◽  
Relative Deformation ◽  
Mechanical Behaviors ◽  
Vertical Joint

Precast two-way hollow slab concrete shear wall is a new structure adapted to housing industrialization. To study the effect of the vertical joint on mechanical behaviors of shear walls, one reinforced concrete shear wall and two precast concrete shear walls built with hollow slabs were quasi-statically tested under low cyclic loading. The study of failure mode and failure process of specimens shows that vertical macro-cracks occurred in precast walls under loading, which made failure behavior of walls evolve from integral wall into split wall. It also shows that relative deformation formed along the vertical joint before peak load, so the ductility of walls is increased. New type shear walls exhibit good ductility and brittle shear failure can be avoided effectively.

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