房建材料及制品_2022_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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房建材料及制品

大跨度混凝土结构井字梁设计方法

白焕一

2022年第2期

摘要

引用本文

摘要：通过对平面轴线尺寸为25.2 m×33.6 m大跨度楼盖的结构分析，探讨了大跨度混凝土结构的设计方法，提出了钢筋混凝土井字梁式楼盖结构的设计方案，可为类似大跨度楼盖结构的设计提供参考。 Abstract: Through the structural analysis of the long-span floor with a plane axis size of 25.2 m × 33.6 m, the design method of the long-span concrete structure is discussed, and the design scheme of the reinforced concrete well-shaped beam-type floor structure is put forward, which can provide a reference for the design of similar long-span floor structures.

白焕一.大跨度混凝土结构井字梁设计方法[J].混凝土与水泥制品,2022(2):76-81. BAI H Y.Design Method of Well-shaped Beam of Long-span Concrete Structures[J].China Concrete and Cement Products,2022(2):76-81.

ALC墙板在装配式混凝土建筑中应用的关键技术研究

牛昌林1，冯力强2，吴星蓉1，周磊1，魏宏亮1

2022年第2期

摘要

引用本文

摘要：以围护体系ALC墙板在装配式混凝土建筑领域中应用的关键技术为研究重点，对ALC墙板的性能特点、设计原理、连接构造进行了分析，并对ALC墙板在寒冷地区的应用提出了建议。 Abstract: Focusing on the key technology of the application of the envelope system ALC wallboard in the field of prefabricated concrete buildings, the performance characteristics, design principles and connection structures of the ALC wallboard are analyzed, and some suggestions on the application of ALC wallboard in cold regions are put forward.

牛昌林,冯力强,吴星蓉,等.ALC墙板在装配式混凝土建筑中应用的关键技术研究[J].混凝土与水泥制品,2022(2):73-75. NIU C L,FENG L Q,WU X R,et al.Study on Key Technology of ALC Wallboard in Prefabricated Concrete Buildings[J].China Concrete and Cement Products,2022(2):73-75.

EPS轻混凝土干燥收缩性能试验研究

郭向勇，李伟龙，王建军

2022年第2期

摘要

引用本文

摘要：通过试验研究了陶粒、PP纤维、膨胀剂、胶凝材料用量以及环境条件对EPS轻混凝土干燥收缩性能的影响，探讨了不同密度等级EPS轻混凝土干燥收缩性能的变化规律。结果表明：EPS轻混凝土的收缩值在90 d内增长较快，180 d后收缩值增速减小；EPS轻混凝土的收缩值随着胶凝材料掺量的增加而增大；掺加膨胀剂、PP纤维以及采用覆膜养护能降低EPS轻混凝土的收缩值，掺入适量陶粒能有效降低EPS轻混凝土的收缩值；低温环境会使EPS轻混凝土的收缩值显著增大；EPS轻混凝土的干燥收缩性能与EPS轻混凝土的组分和各组分材料配比密切相关；采用对数型收缩值计算模型可对EPS轻混凝土的收缩值进行预测。 Abstract: The effects of ceramsite, polypropylene fiber, expansive agent, cementitious materials content and environmental conditions on the drying shrinkage performance of EPS lightweight concrete were studied, and the variation laws of drying shrinkage performance of EPS lightweight concrete with different density grades were studied. The results show that the shrinkage value of EPS lightweight concrete increases rapidly within 90 days, and the growth rate of shrinkage value decreases after 180 days. The shrinkage value of EPS lightweight concrete increases with the increase of cementitious materials content. The shrinkage value of EPS lightweight concrete can be reduced by adding expansive agent, polypropylene fiber and film curing. Adding appropriate amount of ceramsite can effectively reduce the shrinkage value of EPS lightweight concrete. Low temperature environment will significantly increase the shrinkage value of EPS lightweight concrete. The drying shrinkage performance of EPS lightweight concrete is closely related to the components of EPS lightweight concrete and the material ratio of each component. The shrinkage value of EPS lightweight concrete can be predicted by using the logarithmic shrinkage value calculation model.

郭向勇,李伟龙,王建军.EPS轻混凝土干燥收缩性能试验研究[J].混凝土与水泥制品,2022(2):68-72. GUO X Y,LI W L,WANG J J.Experimental Study on Drying Shrinkage of EPS Lightweight Concrete[J].China Concrete and Cement Products,2022(2):68-72.

密拼式钢筋桁架混凝土叠合板力学性能及最大裂缝宽度研究

王丽倩1，杨杰1，金星2，张耀庭1

2022年第2期

摘要

引用本文

摘要：由于密拼式钢筋桁架混凝土叠合板天然存在50~60 mm深度的拼缝，故有必要对其最大裂缝宽度问题进行深入研究。为此，设计制作了3块密拼式叠合板、1块后浇带式叠合板和1块整浇预制板，对其进行了静载试验。试验及数值模拟结果表明，通过公式?滓s≤0.6fyk限制开裂截面处受拉钢筋的钢筋应力能较好地保证密拼拼缝钢筋桁架叠合板在正常使用过程中的最大裂缝宽度的控制问题。 Abstract: It is necessary to study the maximum crack width of reinforced truss concrete composite slab because of its natural seam of 50~60 mm depth. For this reason, three close assembled composite slabs, one post-cast strip composite slab and one precast slab were designed and manufactured, and the static load tests were carried out. The test and numerical simulation results show that limiting the tensile stress of steel bar at cracked section by the formula ?滓s≤0.6fyk can ensure the control of maximum crack width of reinforced truss concrete composite slab with close stitching joints in normal operation.

王丽倩,杨杰,金星,等.密拼式钢筋桁架混凝土叠合板力学性能及最大裂缝宽度研究[J].混凝土与水泥制品,2022(2):61-67. WANG L Q,YANG J,JIN X,et al.Study on the Mechanical Properties and Maximum Crack Width of the Reinforced Truss Concrete Composite Slabs[J].China Concrete and Cement Products,2022(2):61-67.

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