Numerical Model of Non-uniform Freeze-thaw Damaged RC Shear Wall Considering Shear Effect and Bond Slip

被引：0
|
作者：
Rong X. [1 ,3 ]
Lu B. [2 ]
Zhang Q. [2 ]
Huang W. [1 ]
Zheng S. [3 ]
Zhang Y. [4 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
[2] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education（Tongji University, Shanghai
[3] School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an
[4] College of Civil Engineering, Huaqiao University, Xiamen
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2023年 / 50卷 / 09期
关键词：
bond slip model of non-uniform freeze-thaw damage; nonuniform freeze-thaw damage model; OpenSees; RC shear wall; reinforced concrete; shear hysteretic model;
D O I：
10.16339/j.cnki.hdxbzkb.2023102
中图分类号：
学科分类号：
摘要：
To realize reasonable evaluation of the seismic behavior of in-service reinforced concrete（RC）shear walls under a frost action environment，using the relative dynamic elastic modulus as the freeze-thaw damage coefficient and combining with the modified Petersen model，a non-uniform freeze-thaw damage model is constructed. With the existing formula by accurately verified，the shear hysteretic model of intact RC shear walls is established. Then，by analyzing the variation trend of shear strain and shear force of the frozen-thawed damaged RC shear wall affected by parameters，the shear hysteretic model of frost-damaged RC shear wall is established by multiparameter regression analysis. Based on the existing material data，the bond strength model of uneven freeze-thaw damage is established. At the same time，combined with the existing bond-slip model，the slip model of uneven frozen longitudinal reinforcement is established through theoretical derivation. Combined with the established nonuniform freeze-thaw damage model，freeze-thaw shear hysteretic model，and freeze-thaw non-uniform bond strength slip model，a numerical model of freeze-thaw damaged shear wall components is proposed. Finally，the accuracy of the proposed numerical model is verified by using the quasi-static measured data of 8 freeze-thaw damaged RC shear walls with different parameters. The results show that the numerical model established in this paper can accurately simulate the load-deformation relationship of freeze-thaw damaged RC shear walls under low-cycle cyclic loading，and can be used to evaluate the seismic performance of RC shear walls under freeze-thaw environment. © 2023 Hunan University. All rights reserved.
引用
收藏
页码：56 / 68
页数：12
相关论文
共 30 条
  • [1] ZHENG S S，, ZHANG Y X, Experimental study on the seismic behavior of RC shear walls after freeze-thaw damage［J］, Engineering Structures, 206, (2020)
  • [2] ZHANG D Y, ZHENG S S，, YANG W, Experimental study on the seismic behaviors of squat RC shear walls under action of freeze-thaw cycle［J］, Journal of Hunan University （Natural Sciences）, 44, 9, pp. 72-81, (2017)
  • [3] YAZDANI F., Damage assessment， characterization， and modeling for enhanced design of concrete bridge decks in cold regions［D］, (2015)
  • [4] KIM S W，, CHOI K B, YUN H D．, Effect of freeze-thaw cycles after cracking damage on the flexural behavior of reinforced concrete beams, Journal of the Korea Concrete Institute, 22, 3, pp. 399-407, (2010)
  • [5] PETERSEN L., Influence of material deterioration processes on mechanical behavior of reinforced concrete structure ［D］, (2004)
  • [6] YANG W, ZHENG S S，, ZHANG D Y，, Et al., Seismic behaviors of squat reinforced concrete shear walls under freeze-thaw cycles：a pilot experimental study［J］, Engineering Structures, 124, pp. 49-63, (2016)
  • [7] ZHENG S S，, ZHANG Y X, Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment：a further experimental research［J］, Archives of Civil and Mechanical Engineering, 20, 4, (2020)
  • [8] GUO Y R, YAO S Y．, Experimental study on residual seismic behavior of damaged reinforced concrete columns［J］, Journal of Hunan University（Natural Sciences）, 49, 9, pp. 1-8, (2022)
  • [9] MARTINELLI P, FILIPPOU F C．, Simulation of the shaking table test of a seven-story shear wall building［J］, Earthquake Engineering & Structural Dynamics, 38, 5, pp. 587-607, (2009)
  • [10] WALLACE J W., Modeling of cyclic shear-flexure interaction in reinforced concrete structural walls. I：theory［J］, Journal of Structural Engineering, 141, 5, (2015)
123