Vertical collapse modeling and verification of spatial RC frame structures(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年03期
- Page:
- 64-70
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Vertical collapse modeling and verification of spatial RC frame structures
- Author(s):
- PAN Liang1; 2; LIU Boquan1; LEI Tuo1; WU Tao1
- (1. School of Civil Engineering, Changan University, Xian 710061, Shaanxi, China; 2. Infrastructure Department, Northwest A & F University, Yangling 712100, Shaanxi, China)
- Keywords:
- -
- PACS:
- -
- DOI:
- -
- Abstract:
- For the research of the vertical collapse mechanism of the reinforced concrete (RC) space frame structure, a numerical simulation method for the vertical collapse of such structures was explored. Based on the completed pseudostatic loading test of a 1∶3 scale RC space frame structure specimen, the finite element refinement model of the framework was established, and the vertical collapse process simulation of the structure was completed using the ABAQUS finite element software. The constitutive relation of concrete adopts the damage plasticity model by ABAQUS. The elastoplastic model was used for the steel material, and the ductile damage fracture criterion was introduced. Moreover, the damage evolution rule of the steel was taken into consideration. The material parameters were determined according to the wood property test data, and the constraints between the units were considered. The simulation was performed according to the test loading method. The energy history was used to guarantee the stability of the solution, and an explicit algorithm was used to solve the problem. By defining a reasonable time step, defining the smooth amplitude curve loading, using Rayleigh damping to reduce the calculation result oscillation, and using quality commands to amplify commands for the acceleration of calculations, among other measures, the goal of the simulation of static problem was achieved, and the simulation results were compared with the test results. The results show that the damage plasticity model of the ABAQUS concrete and the damage criterion of the steel ductile damage can better simulate the entire process of the vertical collapse test. The simulation results and the test results agree well with the frame loaddisplacement curve, failure characteristics, and steel stress. The collapse analysis model established in this paper can provide a reference for the study of the vertical collapse failure mechanism and collapse simulation of RC frame structures. 2 tabs, 14 figs, 24 refs.
Last Update: 2018-06-13