膨胀珍珠岩基相变混凝土柱轴压性能研究  

Study on axial compression performance of expanded perlite based phase change concrete columns

作　　者：王文杰 李云峰 李鹏成[1] 徐志峰 WANG Wenjie;LI Yunfeng;LI Pengcheng;XU Zhifeng(College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学土木工程与建筑学院,山东青岛266590 [2]山东科技大学山东省土木工程防灾减灾重点实验室,山东青岛266590

出　　处：《混凝土》2024年第4期16-21,共6页Concrete

基　　金：国家自然科学基金(51908341)。

摘　　要：相变混凝土受自身相变材料及其吸附材料强度的影响,其力学性能同普通混凝土相比存在差异。研究相变混凝土的轴压性能及其应用,对8根膨胀珍珠岩基相变混凝土柱进行了轴压性能试验,研究了相变骨料掺量、体积配箍率对相变混凝土柱的破坏模式,荷载-应变曲线及轴压承载力的影响。结果表明:膨胀珍珠岩基相变混凝土柱的破坏形态与普通混凝土柱的破坏形态相同。进一步对试件的荷载-应变曲线进行了分析,结果表明:相变混凝土柱的极限承载力和延性随着相变骨料掺量的增加而降低,随着体积配箍率的增加而提高。基于以上结果,采用规范中的相关计算式对试件承载力进行预测,同时基于约束效应和叠加原理,建立了极限承载力计算式,并将两种计算式的误差进行对比。The mechanical properties of phase change material(PCM)are different from those of ordinary concrete because of the strength of PCM and its adsorbent.In this paper,the axial compression performance of PCM and its application are studied.The axial compression performance experiments are carried out on 8 PCM columns based on expanded perlite(EP),and the effects of the content of PCM aggregate and the volume stirring ratio on the failure mode,load-strain curve and axial compression capacity of PCM columns are studied.The results show that the failure forms of the EP based PCM columns are the same as those of ordinary concrete columns.The load-strain curves of the specimens are further analyzed,and the results show that the ultimate bearing capacity and ductility of the PCM columns decrease with the increase of the PCM aggregate content,and increase with the increase of the volume stirrup ratio.Based on the above results,the bearing capacity of specimens is predicted by the relevant formulas in the specification,and the calcu-lation formula of ultimate bearing capacity is established based on the constraint effect and superposition principle,and the error of the two formulas is compared.

关 键 词：相变骨料 约束相变混凝土 轴压性能 极限承载力 荷载-应变曲线 

分 类 号：TU528.01[建筑科学—建筑技术科学]