- 摘 要
-
（1 鄭州大學(xué)土木工程學(xué)院， 鄭州 450001； 2 鄭州大學(xué)綜合設(shè)計(jì)研究院有限公司， 鄭州 450003）
［摘要］對3根不同配筋率下采用HRB500組合封閉箍筋和縱筋的鋼筋輕骨料混凝土疊合梁和3根對比試件進(jìn)行了受彎性能試驗(yàn)，對疊合梁的正截面受彎承載力、抗裂性、撓度以及裂縫開展情況進(jìn)行了分析。結(jié)果表明：采用HRB500組合封閉箍筋和縱筋的鋼筋輕骨料混凝土疊合梁的破壞形態(tài)、受彎性能與整澆對比梁相近，梁正截面的平截面假定仍然適用，正截面受彎承載力、開裂荷載及撓度仍可按照現(xiàn)行規(guī)程JGJ 12—2006中的計(jì)算公式計(jì)算。
［關(guān)鍵詞］HRB500鋼筋； 輕骨料混凝土； 疊合梁； 受彎承載力； 撓度
中圖分類號：TU375-1， TU528-2文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)22-0088-05
Experimental study on flexural behavior of lightweight aggregate concrete composite beams with HRB500 rebars
Sun Gangzhu1, Zhong Xiangwei1, Yu Qiubo1,2, Li Xuejia1
(1 College of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China; 2 Zhengzhou University Comprehensive Design and Research Institute Co., Ltd., Zhengzhou 450003, China)
Abstract:Flexural behavior experiments were carried out on three reinforced lightweight aggregate concrete composite beams and three comparative specimens with HRB500 combined closed stirrups and longitudinal reinforcements under different reinforcement ratios, and the normal section flexural bearing capacity of the composite beams, the crack resistance, deflection and crack development were analyzed. The results show that the failure modes and flexural behaviors of the reinforced lightweight aggregate concrete composite beams with HRB500 combined closed stirrups and longitudinal reinforcement are similar to those of the cast-in-place comparison beams. The flat section assumption of the beam normal section is still applicable, and the normal section bending capacity, cracking load and deflection can still be calculated according to the calculation formula in the current regulation JGJ 12—2006.
Keywords:HRB500 rebar; lightweight aggregate concrete; composite beam; bending capacity; deflection
*2016年河南省科技攻關(guān)（162102310190）。
作者簡介：孫鋼柱，博士，教授級高級工程師，碩士生導(dǎo)師，Email:slsyxdy@163.com。
- 下載地址
-
