新型双向肋叠合板力学性能模拟分析  

Simulation Analysis on Mechanical Properties of a Novel Bi-directional Ribbed Composite Slab

作　　者：孙椿兴 朱志刚 覃绍鑫 蔡泽藩 程志坚 SUN Chunxing;ZHU Zhigang;QIN Shaoxin;CAI Zefan;CHENG Zhijian(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430074,China)

机构地区：[1]武汉工程大学土木工程与建筑学院,湖北武汉430074

出　　处：《土木工程与管理学报》2025年第1期52-58,共7页Journal of Civil Engineering and Management

基　　金：武汉工程大学第十五届研究生教育创新基金(CX2023337)。

摘　　要：为降低装配式建筑叠合板的造价,优化其结构设计,提出了一种新型双向肋叠合板,并建立了3种板构件模型(新型双向肋叠合板、现浇板、钢筋桁架叠合板),分别对其在均布荷载作用下的力学性能进行了对比研究。分析了新型双向肋叠合板预制底板的应力、应变发展过程,3种板构件的开裂荷载、挠度变化及正常使用极限状态和承载力极限状态下的裂缝分布和承载力,并进一步研究了实际工程应用中板端约束作用下的承载力。结果表明:当均布荷载施加到7 kPa时,3种板构件均开始出现裂缝。荷载相同时,新型双向肋叠合板的板底裂缝分布更加均匀,其跨中挠度与现浇板相近。新型双向肋叠合板、现浇板及钢筋桁架叠合板的极限承载力分别为31.0,38.8,42.2 kN·m;考虑板端约束后,极限承载力分别提高至69.8,73.9,74.8 kN·m。In order to reduce the cost of prefabricated composite slab,optimize the structural design,a novel bi-directional ribbed composite slab was proposed,and the creation of three slab component models,including novel bi-directional ribbed composite slab,cast-in-place slab,and reinforced truss composite slab,are established to facilitate a comparative analysis of their mechanical properties under uniform distributed loading.The analysis was conducted,delving into the stress and strain evolution process of the novel bi-directional ribbed prefabricated base slabs,the cracking load and deflection variations of the three slab components as well as the crack distribution and bearing capacity at the normal service limit state and ultimate bearing capacity limit state.Additionally,the load-bearing capacity under the constraint effect of slab ends in practical engineering applications was further investigated.The results show that under a uniform distributed load of 7 kPa,all three types of slabs initiate cracking.At the same loading condition,the novel bi-directional ribbed composite slab exhibits a more uniform crack distribution at the bottom,with mid-span deflection akin to that of the cast-in-place slab.The ultimate load capacity of the novel bi-directional ribbed composite slab,cast-in-place slab and reinforced truss composite slab is 31.0,38.8,42.2 kN·m,respectively.When considering the constraint effect of slab ends,the ultimate load capacityincreases to 69.8,73.9,74.8 kN·m,respectively.

关 键 词：装配式建筑 双向肋叠合板 力学性能 有限元模拟 

分 类 号：TU375.2[建筑科学—结构工程]