Torsional strength of RC members using a plasticity-based variable-angle space truss model accounting for non-uniform longitudinal reinforcement

2021 ◽  
Vol 228 ◽  
pp. 111540
Author(s):  
Dario De Domenico
Keyword(s):  
Longitudinal Reinforcement ◽  
Torsional Strength ◽  
Space Truss ◽  
Truss Model ◽  
Variable Angle ◽  
Angle Space

Unity Equation of Torsional Capacity for RC Members Subjected to Axial Compression, Bend, Shear and Torque

2010 ◽  
Vol 163-167 ◽  
pp. 874-879
Author(s):  
Jin Jie Men ◽  
Qing Xuan Shi ◽  
Qiu Wei Wang
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Concrete Members ◽  
Space Truss ◽  
Truss Model ◽  
Variable Angle ◽  
Mechanics Performance ◽  
Angle Space ◽  
Calculation Results ◽  
Better Than

The mechanics performance of reinforced concrete members subjected to axial compression, bending, shear and torque is very complex. Several calculation models have been established to estimate the torsional capacity of combined torsion members; however, the calculation results of different models have a great variation. In this paper, variable-angle space truss model is adopted to analyze the mechanics performance of reinforced concrete members subjected to combined torsion. With respect to various shapes of specimens, various load modes, and various strength of concrete, a unity equation about torsional capacity of combined torsional member is obtained. Based on the unity equation, the torsional capacity of 59 combined torsional specimens is calculated. In contrast with the equation of ACI and the code of China, the torsional capacity calculated by the unity equation agrees well with the results of experiment and much better than the results of ACI code and China code. It is concluded that the unity equation can provide valuable reference for calculation and design of combined torsion members.

scholarly journals A space-truss model for plain-weave coated fabrics

1980 ◽  
Vol 4 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Norris Stubbs ◽  
Harold Fluss
Keyword(s):  
Plain Weave ◽  
Space Truss ◽  
Truss Model ◽  
Coated Fabrics

Damping Integrated Technology in Three Concentric Circles Stereoscopic Applications on Steel Arch Truss

2013 ◽  
Vol 788 ◽  
pp. 594-597
Author(s):  
Peng Yu Li ◽  
Zhi Chang Gao
Keyword(s):  
Dynamic Characteristics ◽  
Concentric Circle ◽  
Viscous Dampers ◽  
Shock Absorption ◽  
Modal Characteristics ◽  
Integrated Technology ◽  
Damping Effect ◽  
Space Truss ◽  
Truss Model ◽  
Concentric Circles

By the software SAP2000, this article established a 60 m span steel arch three concentric circle space truss model, derived modal characteristics, mastered the dynamic characteristics. By using isolation bearing, viscous dampers[1], shock absorption technology and integrated rear arch truss damping effect. Conclusions show that integrated damping technology, making the earthquake forces effectively reduced.

scholarly journals Experiment on Torsional Behaviour of Reinforced Concrete Beams

2019 ◽  
Vol 8 (6S4) ◽  
pp. 100-104
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Experimental Results ◽  
Reinforced Concrete Beams ◽  
Longitudinal Reinforcement ◽  
Torsional Moment ◽  
Torsional Strength

Structural beams in construction are subjected to significant torsional moment which affects the design of structures.Eight beams were produced with two distinct grade of concrete with two ratios of longitudinal as well as transverse reinforcements.An experiment for evaluation of torsional strength of reinforced concrete beams is presented in this paper.The main objective of this study is to access the role of varying percentage of transverse and longitudinal reinforcements on torsional strength of beams.Concrete grades of M 20 and M 30 beams were cast with 0.56% and 0.85% of longitudinal reinforcement as well as 50 mm and 75 mm spacing of stirrups.The experimental results are presented.The reported results include the behavioural curves and the values of torsional moment and angle of twist for entire 8 beams

scholarly journals Destruction Feature Extraction of Prefabricated Residential Building Components Based on BIM

2022 ◽  
Vol 2022 ◽  
pp. 1-12
Author(s):  
Peili Zhao ◽  
Xiaohong Liu ◽  
Zhisheng Liang
Keyword(s):  
Feature Extraction ◽  
Monitoring System ◽  
Residential Building ◽  
Building Construction ◽  
Superposition Method ◽  
Strength Theory ◽  
Space Truss ◽  
Angle Space ◽  
Building Components ◽  
Damage Characteristic

In order to improve the damage feature extraction effect of prefabricated residential building components and improve the structural stability of prefabricated residential components, this paper applies BIM technology to the structural feature analysis of prefabricated residential components. Moreover, this paper adopts the simple superposition method and combines the first strength theory of material mechanics to derive the formula for calculating the cracking torque of prefabricated residential building components under compound torsion. In addition, based on the variable-angle space truss model, this paper uses a simple superposition method to derive the calculation formula for the ultimate torque of composite torsion of fabricated residential building components and applies it to the BIM fabricated residential model. Finally, this paper constructs an intelligent BIM prefabricated residential building construction damage characteristic monitoring system. Through experimental research, it can be seen that the intelligent BIM prefabricated residential building construction damage feature monitoring system proposed in this paper can monitor the damage characteristics of prefabricated residential building construction and can predict the evolution of subsequent building features.

Comprehensive Modal Tests of a Space Truss Model for Damage Assessment

1996 ◽  
Author(s):  
Cesar J. Carrasco ◽  
Roberto A. Osegueda ◽  
Carlos M. Ferregut ◽  
Brian Harms ◽  
David Meza ◽  
...  
Keyword(s):  
Damage Assessment ◽  
Space Truss ◽  
Truss Model

scholarly journals Generalized Softened Variable Angle Truss Model for RC Hollow Beams under Torsion

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2209
Author(s):  
Luís Bernardo
Keyword(s):  
Solution Procedure ◽  
Pure Torsion ◽  
Specific Behavior ◽  
Torsional Response ◽  
Truss Model ◽  
Variable Angle ◽  
Theoretical Predictions ◽  
Hollow Beams ◽  
Theoretical Results ◽  
Good Agreement

In recent studies, a new softened truss model called Generalized Softened Variable Angle Truss Model (GSVATM) has been proposed to compute the full torsional response of reinforced concrete (RC) rectangular solid beams under pure torsion. In this article, the GSVATM is extended to cover RC hollow beams under torsion. The modification of the calculation procedure, in order to account for the specific behavior of RC hollow beams for low loading levels, as well as the final solution procedure, is presented. The theoretical predictions from the extended GSVATM are compared with experimental results of RC hollow beams under torsion found in the literature. Good agreement is observed between the experimental and theoretical results, for both high and low loading levels.

Generalized softened variable angle truss-model for reinforced concrete beams under torsion

2014 ◽  
Vol 48 (7) ◽  
pp. 2169-2193 ◽  
Author(s):  
L. F. A. Bernardo ◽  
J. M. A. Andrade ◽  
N. C. G. Nunes
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Truss Model ◽  
Variable Angle
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