Dynamic analysis of reinforced concrete structure with strain rate effect

Various seismic-resistant design methods are used to ensure the stability of multi-story buildings against lateral forces caused by earthquakes. Utilization of reinforced concrete shear walls is one of the most reliable methods of design and construction of earthquake-resistant buildings because it increases structural resistance to lateral loads and stiffens and strengthens the structure, thereby minimizing earthquake-induced damages. This paper investigates the beneficial effects of using shear walls in the structural design of a typical low-rise building to improve its resistance to earthquake events. To this end, a four-story reinforced concrete structure is modeled first without shear walls, then with the addition to shear walls. The 2002 Denali Alaska earthquake is used as an example of a severe seismic excitation because it is considered the most massive strike-slip earthquake in North America in almost 150 year. SAP2000 is used to perform the dynamic analysis. In order to obtain an accurate representation of the structure’s behavior, response modal nonlinear time-history dynamic analysis is utilized to analyze and compare the response of the building with and without shear walls. Study results showed that shear walls are very effective in achieving compliance with seismic design codes. In addition, the use of shear walls significantly reduces the shear stresses, bending moments, and displacements of the various members of the structure.

Download Full-text

STRAIN RATE EFFECT ON DYNAMIC RESPONSE OF REINFORCED CONCRETE SLABS UNDER IMPACT LOADING

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijsx.406.0_25 ◽

1989 ◽

Vol 406 (0) ◽

pp. 25-35 ◽

Cited By ~ 3

Author(s):

HIROSHI YAMAGUCHI ◽

KAZUO FUJIMOTO

Keyword(s):

Reinforced Concrete ◽

Dynamic Response ◽

Strain Rate ◽

Impact Loading ◽

Strain Rate Effect ◽

Rate Effect ◽

Concrete Slabs ◽

Reinforced Concrete Slabs

Download Full-text

Numerical Simulation of One-Way Reinforced Concrete Slabs Subjected to Blast Loadings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.726 ◽

2013 ◽

Vol 671-674 ◽

pp. 726-730

Author(s):

Tian Hua Li ◽

Jun Hai Zhao ◽

Xiao Ming Dong

Keyword(s):

Numerical Simulation ◽

Reinforced Concrete ◽

Numerical Model ◽

Strain Rate ◽

Strain Rate Effect ◽

Rate Effect ◽

Dynamic Responses ◽

Reinforced Concrete Slabs ◽

Rc Slabs ◽

Blast Loadings

The damage and failure of reinforced concrete (RC) slabs under blast loadings may cause significant hazards for frame systems even progressive collapse of whole structures. The numerical simulation of one-way RC slabs using the finite element explicit code LS-DYNA to estimate the dynamic response and failure mode of one-way RC slabs .Blast loadings are imposed on the top surface of slabs using a blast model based on conwep algorithm. Concrete was modeled using a concrete damage constitutive model considering strain rate effect, and reinforcement was modeled using a elastoplastic material type with kinematic hardening and strain rate effect. The numerical model is introduced in details and adopted to simulate the dynamic responses of RC slabs in reference test. The numerical model can match well with the test data, and thus the proposed numerical model can be considered as a valuable tool in assessing the deformation or failure mechanism and predicting the dynamic responses of one-way RC slabs subjected to blast loadings.

Download Full-text

A study of strain-rate effect and fiber reinforcement effect on dynamic behavior of steel fiber-reinforced concrete

Construction and Building Materials ◽

10.1016/j.conbuildmat.2017.09.093 ◽

2018 ◽

Vol 158 ◽

pp. 657-669 ◽

Cited By ~ 32

Author(s):

Xiaowang Sun ◽

Kai Zhao ◽

Yongchi Li ◽

Ruiyuan Huang ◽

Zhongbao Ye ◽

...

Keyword(s):

Reinforced Concrete ◽

Strain Rate ◽

Dynamic Behavior ◽

Steel Fiber ◽

Fiber Reinforcement ◽

Strain Rate Effect ◽

Rate Effect ◽

Fiber Reinforced Concrete ◽

Reinforcement Effect ◽

Steel Fiber Reinforced Concrete

Download Full-text

Study on Strain Rate Effect in High-Rise Reinforced Concrete Shear Wall Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.5854 ◽

2011 ◽

Vol 243-249 ◽

pp. 5854-5857

Author(s):

Hao Zhang ◽

Hong Nan Li ◽

Zhe Wang

Keyword(s):

Reinforced Concrete ◽

Dynamic Response ◽

Strain Rate ◽

Shear Wall ◽

Strain Rate Effect ◽

Rate Effect ◽

Wall Structure ◽

Nonlinear Dynamic Response ◽

High Rise ◽

Finite Element Software

The dynamic behavior affected by strain rate effect of the high-rise reinforced concrete shear wall structure subjected to seismic loading are analyzed by finite element software ABAQUS. The damaged plasticity model for concrete was used, and the strain rate effect of concrete and steel were considered. The nonlinear dynamic response results with strain rate effect are compared with the results without strain rate effect. The distribution of strain rate can not only influence the concrete and steel, but also have some effects on the dynamic response of the high-rise reinforced concrete shear wall structure. The strain rate effect is more prominent under the stronger seismic wave.

Download Full-text