轻钢龙骨混凝土复合外挂墙板力学性能试验研究  

Experimental Study on Mechanical Properties of Light Steel Keel Concrete Composite Exterior Wall Panel

作　　者：魏晓斌[1] 郭建祥 汤东婴[1] 孙正华[1] 汪晟 WEI Xiaobin;GUO Jianxiang;TANG Dongying;SUN Zhenghua;WANG Sheng(Jiangsu Testing Center for Quality of Construction Engineering Co.,LTD.,Nanjing 210033,China)

机构地区：[1]江苏省建筑工程质量检测中心有限公司,南京210033

出　　处：《结构工程师》2024年第1期99-106,共8页Structural Engineers

基　　金：国家重点研发计划项目(2021YFF0602000);住房和城乡建设部项目(K20221278)。

摘　　要：复合墙板性能关系着结构的安全,在新设计建造的轻钢龙骨复合墙板投入使用前应进行力学性能试验,以评估其安全性能。为研究墙板的受力变形过程及破坏形态,对两片不同的轻钢龙骨混凝土复合外挂墙板分别进行四点弯曲试验和低周反复荷载试验。弯曲试验结果表明,弯曲过程中墙板出现裂缝时的计算等效均布荷载大于建筑风荷载标准值,抗弯性能满足受力要求。墙板经历了弹性阶段、弹塑性变形阶段和屈服破坏阶段,主要通过钢材屈服后的弹塑性变形和材料的破坏来实现耗能,屈服前耗能占总耗能的6.19%,屈服后累计耗能呈现二次抛物线增长,这一结果体现了墙板良好的抗震能力。研究结果可为实际应用提供依据。The performance of composite wall panels is directly related to the safety of structures.Therefore,prior to the implementation of newly designed and constructed lightweight steel joist composite wall panels,it is imperative to conduct mechanical performance tests to evaluate their safety capabilities.To investigate the deformation and failure mechanism of wall panels,two types of lightweight steel joist concrete composite external wall panels are subjected to four-point bending tests and low-cycle cyclic loading tests,respectively.The results of the four-point bending tests indicate that the calculated equivalent uniformly distributed load exceeds the standard value of wind load for buildings when cracks appear on the wall panel,and the bending performance of the wall panel meets the stress requirements.The low-cycle loading test results reveal that the wall panel undergoes three stages of deformation:elastic stage,elastic-plastic deformation stage,and yielding failure stage.Energy dissipation is mainly realized by elastic-plastic deformation and material failure after steel yielding.The energy dissipation before yielding accounts for 6.19%of the total energy dissipation,and the cumulative energy dissipation after yielding shows a quadratic parabolic growth,which reflects the favorable seismic capability of the wall panel.Outcome of this work can provide a basis for practical application.

关 键 词：墙板 力学性能 抗弯试验 低周反复试验 

分 类 号：TU398.9[建筑科学—结构工程]