房建材料及制品_2022_《混凝土與水泥制品》雜志社

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房建材料及制品

混凝土輕質墻板上墻含水率對干燥收縮影響的試驗研究

夏彬華1，楊偉軍1，易思容1，楊建宇1，姜鵬霄2

2022年第1期

摘要

引用本文

摘 ? 要：針對混凝土輕質墻板的上墻含水率及其對墻體干縮性能的影響，進行了含水率試驗，研究了混凝土輕質墻板上墻含水率對干縮性能及其防裂措施的影響，探索了混凝土輕質墻板干縮隨含水率的變化規律，提出了混凝土輕質墻板含水率時變模型，可為墻板合理的養護或上墻時間、干縮裂縫控制提供參考。 Abstract: Aiming at the moisture content during construction of the concrete lightweight wallboard and its influence on the dry shrinkage performance of the wall, the moisture content test was carried out. The influence of moisture content during construction of concrete lightweight wallboard on dry shrinkage performance and crack prevention measures was studied, and the variation law of dry shrinkage of concrete lightweight wallboard with moisture content was studied. Furthermore, the time-varying model of moisture content of concrete lightweight wallboard was put forward. The results can provide a reference for the reasonable maintenance time and the control of dry shrinkage cracks.

夏彬華,楊偉軍,易思容,等.混凝土輕質墻板上墻含水率對干燥收縮影響的試驗研究[J].混凝土與水泥制品,2022(1):76-79,94. XIA B H,YANG W J,YI S R,et al.Experimental Study on the Effect of Moisture Content During Construction on Dry Shrinkage of Concrete Lightweight Wallboard[J].China Concrete and Cement Products,2022(1):76-79,94.

玄武巖纖維筋混凝土梁正截面抗彎承載力試驗研究

熊琦龍1，周凱1，范佩1，吳小勇1，2

2022年第1期

摘要

引用本文

摘 ? 要：為了研究BFRP筋混凝土梁的抗彎性能，進行了不同配筋率和不同配筋形式BFRP筋混凝土梁的四點彎曲試驗，分析了試件的跨中撓度、抗彎承載力和裂縫分布規律。結果表明：BFRP筋混凝土梁的彎矩-撓度曲線表現出試件開裂、峰值彎矩為轉折點的三折線特征；BFRP筋與鋼筋混合配筋梁的彎矩-撓度曲線表現出試件開裂、鋼筋屈服和峰值彎矩為轉折點的四折線特征；BFRP筋與鋼筋混合配筋能提高鋼筋混凝土梁的抗彎承載力，減小BFRP筋混凝土梁的撓度和裂縫寬度，同時發揮BFRP筋強度高的特點；BFRP筋與鋼筋混合配筋梁符合平截面假定，并給出了正截面抗彎承載力計算公式。 Abstract: In order to study the flexural performance of concrete beams reinforced with BFRP rebar, the four-point bending tests of BFRP reinforced concrete beams with different reinforcement ratios and different reinforcement forms were carried out, and the mid-span deflection, flexural capacity, and crack distribution of the specimens were analyzed. The results show that the bending moment-deflection curves of BFRP reinforced concrete beams show the characteristics of three-fold curve with specimen cracking and peak bending moment as the turning point. The bending moment-deflection curves of beams reinforced with BFRP rebar and steel rebar show the characteristics of four-fold curve with specimen cracking, steel yield and peak bending moment as the turning point. The mixed reinforcement of BFRP rebar and steel rebar can improve the flexural capacity of the reinforced concrete beams, reduce the deflection and crack width of BFRP reinforced concrete beams, and the strength of BFRP rebar can be sufficiently utilized. The beams reinforced with BFRP rebar and steel rebar conform to the plane section assumption, and the calculation formula of flexural capacity of the beams is given.

熊琦龍,周凱,范佩,等.玄武巖纖維筋混凝土梁正截面抗彎承載力試驗研究[J].混凝土與水泥制品,2022(1):71-75. XIONG Q L,ZHOU K,FAN P,et al.Experimental Study on Flexural Capacity of Cross Section of Basalt Fiber Reinforced Concrete Beams[J].China Concrete and Cement Products,2022(1):71-75.

FRP布加固鋼筋混凝土短柱軸壓性能試驗研究

閆清峰1，張紀剛1，2，張宜聰1，張夢琳1，時成龍1

2022年第1期

摘要

引用本文

閆清峰,張紀剛,張宜聰,等.FRP布加固鋼筋混凝土短柱軸壓性能試驗研究[J].混凝土與水泥制品,2022(1):64-70. YAN Q F,ZHANG J G,ZHANG Y C,et al.Experimental Study on Axial Compression Performance of Reinforced Concrete Short Columns Strengthened with FRP Sheets[J].China Concrete and Cement Products,2022(1):64-70.

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