加腋梁加腋板楼盖在地下室顶板中的应用与经济性分析

Application and economy analysis of the floor with haunched beam and haunched slab in the top plate of basement

加腋梁加腋板楼盖是基于地下室顶板的大跨度和高承载需求而产生的新型楼盖形式。首先详细介绍该楼盖结构布置形式和构造,并简要说明常见加腋梁板计算方法的局限性,提出使用有限元非线性分析方法进行计算;随后重点分析加腋部分对梁板弯矩分布、配筋及造价的影响,得出在受力特性良好和造价较低的情况下梁和板的最优加腋尺寸及加腋梁板配筋的最不利位置;最后通过与单向板主次梁楼盖对比来深入分析该楼盖的经济性。结果表明,加腋梁加腋板楼盖的平均设备成本,在普通荷载和常6级人防荷载作用下的平均结构成本、平均综合成本均较低,因此该楼盖应在地下室顶板中予以推广。

Based on the need of the large span and high bearing capacity in the top plate of basement,the floor with haunched beam and haunched slab was produced as a new-type structure.At first,the structural arrangement and details of this floor were introduced minutely,and the limitations of common calculation methods for the haunched beam and the haunched slab were illustrated briefly,then the non-linear finite analysis method for calculation was proposed.Secondly,the influence of the haunched parts on the bending moment distribution,reinforcement,cost in beam and slab was emphatically analyzed,then the optimum haunched sizes of the beam and slab,and the most unfavorable position of reinforcement of haunched beam and slab were obtained under the condition of good mechanical characteristics and low cost.At last,the economy of the floor with the haunched beam and the haunched slab was analyzed deeply by comparing with the one-way floor system of main-secondary beams.The results show that the average equipment cost of the floor with haunched beam and haunched slab,the average structure cost and the average combined cost of this floor under the action of the normal load and grade 6 civil air load for conventional weapon were lower.Therefore,it should be popularized in the top plate of basement.