非杆件大体积混凝土结构内力及配筋计算合理性分析  

Rationality analysis of internal force and reinforcement calculation of non-member mass concrete structure

作　　者：王勤振 刘海民[1] 冯超 WANG Qin-zhen;LIU Hai-min;FENG Chao(CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China)

机构地区：[1]中交水运规划设计院有限公司,北京100007

出　　处：《水运工程》2021年第10期295-299,共5页Port & Waterway Engineering

摘　　要：针对非杆件大体积混凝土结构设计领域,以柳江红花水利枢纽复线船闸混合式闸室边墩墙为例,对传统手算法、有限元法关于内力及配筋计算进行对比分析。结果表明,有限元应力积分法求弯矩适用于传统杆件结构,闸室边墩墙作为非杆件体系大体积混凝土结构,截面高度大,受压区范围占比大,中性轴偏向受拉区,按应力积分法求弯矩,弯矩值偏大;传统手算法与有限元应力积分法计算内力,按矩形截面偏心受压构件正截面受压承载力进行配筋计算,所需受拉钢筋量多,不经济;有限元弹性应力图形法分析受拉区混凝土拉应力,产生的拉力完全由受拉钢筋承担,按非杆件体系钢筋混凝土结构配筋计算原则,实际配置受拉钢筋量合理、经济。Aiming at the field of non-member mass concrete structure design,we take the side pier wall of compound lock chamber of the second lock for Honghua water control project in Liujiang as an example,compare and analyze the traditional hand calculation method and finite element method about internal force and reinforcement calculation.The results show that the finite element stress integral method is suitable for calculating the bending moment of the traditional member structure.As a mass concrete structure of non-member system,the side pier wall of lock chamber has a large section height and a large proportion of the compression area,and the neutral axis is inclined to the tension area.The bending moment calculated by stress integral method is too large.The traditional hand calculation method and the finite element stress integral method are used to calculate the internal force,and the reinforcement requires a large number of tensile reinforcements and is not economical when calculating by the compression bearing capacity of the normal section of the eccentric compression member with rectangular section.The tensile stress of concrete in the tension area analyzed by the finite element elastic stress graph method is completely borne by the tensile reinforcement.According to the reinforcement calculation principle of non-member system reinforced concrete structure,the actual amount of tensile reinforcement is reasonable and economical.

关 键 词：非杆件 大体积混凝土 内力及配筋计算 合理性 

分 类 号：U641.2[交通运输工程—船舶及航道工程]