某体育场挑篷改建工程设计

针对某体育场挑篷结构原设计方案存在支承柱水平刚度不足、网壳跨中竖向挠度过大等问题,本文介绍得以解决的措施.在悬挑部分的最前檐增加一榀拱形桁架,并且加大其下弦杆件的截面面积,以提高结构竖向刚度和强度;沿挑篷短跨方向间隔一定网格间距加大部分弦杆的截面尺寸,增大支撑黄金束及附近杆件的截面面积,挑篷中部的六根落地钢筋混凝土柱改为钢管混凝土柱,并与原看台结构相连,达到柱具有足够侧向刚度;结构两端由原砼柱支承改为网壳结构直接四点落地,以提高结构整体刚度.分析表明,调整以后的结构能满足强度和刚度要求.

Design of rebuilded Project of a stadium roof structure

To the problem of exceeded vertical displacement of the middle of span due to deficiency of horizontal stiffness of supporting columns in the original structural design,some solving measures were introduced.To improve the structural vertical stiffness and strength,an arch truss was added in the front of the cantilever,and the increased areas of lower chords were used.Section dimensions of some chords,supported bars and connected bars were augmented at a distance along the direction of short span.The six concrete columns were changed to concrete-filled tubular steel columns,and these columns were connected with the original stand structure to improve the lateral stiffness of columns.The concrete columns at the two ends were supported on the ground to improve the whole stiffness of the structure.The adjusted structural stiffness and strength can satisfy the requirement of code.