CAJ | 학술논문

为了有效地模拟应变硬化水泥基复合材料（SHCC）构件在地震作用下的性能，提出一种可模拟 SHCC 构件在反复荷载作用下的单轴本构模型。该模型中 SHCC 材料受压骨架曲线的上升段采用二次抛物线形式模拟，下降段采用双折线形式模拟；受拉骨架曲线的上升段、应变硬化段及下降段则采用三折线形式模拟。通过设置参考点的方法确定 SHCC 的卸载规则，考虑了不完全卸载再加载的情况以及加载过程中的拉压间的传递模式。利用 OpenSEES 计算平台编写了该本构模型，并与材料和构件2个层次的试验结果进行了对比，结果表明，所提出的单轴滞回模型能够准确地反映 SHCC 材料在反复荷载作用下的受力性能。
위료유효지모의응변경화수니기복합재료（SHCC）구건재지진작용하적성능，제출일충가모의 SHCC 구건재반복하재작용하적단축본구모형。해모형중 SHCC 재료수압골가곡선적상승단채용이차포물선형식모의，하강단채용쌍절선형식모의；수랍골가곡선적상승단、응변경화단급하강단칙채용삼절선형식모의。통과설치삼고점적방법학정 SHCC 적사재규칙，고필료불완전사재재가재적정황이급가재과정중적랍압간적전체모식。이용 OpenSEES 계산평태편사료해본구모형，병여재료화구건2개층차적시험결과진행료대비，결과표명，소제출적단축체회모형능구준학지반영 SHCC 재료재반복하재작용하적수력성능。
For effectively simulating the seismic behavior of strain hardening cementitious composites (SHCC)members,a uniaxial cyclic constitutive model for SHCC was proposed.The ascending branch of the compressive envelop curve was imitated by using the form of parabolic curve;while the bilinear form was adopted for the descending branch.A trilinear form was used to imitate the as-cending,strain-hardening and descending branches of tensile stress-strain curve.By the method of setting reference point,the rules of unloading process were determined in consideration of the partial unloading-reloading scheme.Furthermore,the transition between tension and compression was con-sidered in the cyclic model.The proposed cyclic constitutive model was coded by OpenSEES soft-ware and applied to simulate the material and component tests.The simulation results indicate that the proposed model is reasonably accurate in simulating the mechanical properties of SHCC and the cyclic behavior of SHCC flexural element.