水泥混凝土制品_2023_《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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水泥混凝土制品

预制混凝土弧形屋面构件的设计与应用

秦康，王新建，何仕

2023年第7期

摘要

引用本文

摘要：为提高仿古建筑的施工质量和施工效率，基于实际工程项目，研发了预制弧形屋面构件，结合二次深化设计，从构件生产、框梁浇筑、施工安装等方面介绍了相关工艺要点，可为仿古建筑的工业化发展提供参考。 Abstract: In order to improve the construction quality and efficiency of antique architecture, based on actual engineering projects, prefabricated arc roof components were designed. Combined with secondary deepening design, relevant process points were introduced from the aspects of component production, frame beam pouring, construction installation, etc., which can provide a reference for the industrial development of antique architecture.

秦康,王新建,何仕.预制混凝土弧形屋面构件的设计与应用[J].混凝土与水泥制品,2023(7):39-41,45. QIN K,WANG X J,HE S.Design and application of prefabricated concrete arc roof components[J].China Concrete and Cement Products,2023(7):39-41,45.

低层建筑用预制装配式混凝土基础的设计研究

宋小辉1，2，曹淑上1，2

2023年第7期

摘要

引用本文

摘要：针对农村低层框架结构房屋受力特点，研发了预制装配式混凝土基础，介绍了其与周围联系梁、上部预制混凝土柱的连接节点构造，并采用早强、高强水泥基灌浆料对预留键槽进行浇筑，实现了短时间内节点区域混凝土强度达到继续施工的要求，具有缩短工期、绿色环保等特点，可为低层装配式建筑的工业化提供参考。 Abstract: In response to the stress characteristics of low-rise frame structure houses, a prefabricated concrete foundation is developed, and its connection node structure with surrounding connecting beams and upper prefabricated concrete columns is introduced. Early strength and high-strength cement-based grouting materials are used to pour the reserved keyway, which can achieve the concrete strength in the node area to meet the requirements of continuous construction in a short period of time, and has the characteristics of shortening the construction period, green and environmental protection, which can provide a reference for the industrialization of low-rise prefabricated buildings.

宋小辉,曹淑上.低层建筑用预制装配式混凝土基础的设计研究[J].混凝土与水泥制品,2023(7):42-45. SONG X H,CAO S S.Study on the design of prefabricated concrete foundation for low-rise building[J].China Concrete and Cement Products,2023(7):42-45.

超高性能混凝土U形包裹加固钢筋混凝土T梁研究

吕长荣1，刘鹤1，亓兴军1,*，米家禾1，郭冬梅1，张朋2

2023年第7期

摘要

引用本文

摘要：为改善简支T梁损伤累积导致的抗弯、抗剪承载能力不足等问题，提出了采用超高性能混凝土（UHPC）U形三面包裹T梁底板和腹板的加固方案，建立了T梁加固前和采用加固后的非线性有限元模型，进行了四点弯曲试验及抗剪试验数值模拟，通过对比加固前后荷载-位移曲线，分析了加固前后的抗弯、抗剪性能。结果表明：基于ABAQUS软件模拟T梁抗弯剪试验的准确性较高，可用于后续桥梁的加固分析；采用C120、C150强度等级UHPC加固后的T梁在极限抗弯承载能力上较加固前分别提升了69%、77%；在相同剪跨比下，加固后T梁的抗剪承载力和抗变形性能显著提升；加固后有效地抑制了损伤的发展，为T梁提供了较大安全储备。 Abstract: In order to improve the problems of insufficient flexural and shear bearing capacity caused by the accumulation of damage in a simply supported T-beam, a reinforcement scheme of reinforcing the bottom plate and web of reinforced concrete T-beam with U-shaped wrapped reinforcement was proposed. A nonlinear finite element model of the T-beam before strengthening and after strengthening with UHPC reinforcement was established, and numerical simulations of four-point bending test and shear test were carried out to compare the load-displacement curves before and after strengthening, and the differences in flexural and shear performance between the two were analyzed. The results indicate that the accuracy of simulating T-beam flexural and shear tests based on ABAQUS software is high and can be used for subsequent bridge reinforcement analysis. The ultimate flexural load capacity of the T-beam after strengthening with C120 and C150 UHPC is increased by 69% and 77% respectively compared with that before reinforcement. The shear load capacity and deformation resistance of the reinforced simply-supported T-beam can be significantly improved under the same shear-to-span ratio. The UHPC reinforcement effectively inhibits the development of damage, and provides a larger safety reserve for the reinforced concrete T-beam.

吕长荣,刘鹤,亓兴军,等.超高性能混凝土U形包裹加固钢筋混凝土T梁研究[J].混凝土与水泥制品,2023(7):46-50. LYU C R,LIU H,QI X J,et al.Research on ultra-high performance concrete U-shaped wrapped reinforced concrete T-beams[J].China Concrete and Cement Products,2023(7):46-50.

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