两种规范裂缝宽度计算结果对比分析

摘要

《混凝土结构设计规范》（GB50010—2010）于2011年7月1日正式实施。以单筋矩形截面梁为例,通过不同工况的计算分析,得出《水工混凝土结构设计规范》（SL191—2008）与《混凝土结构设计规范》（GB50010—2010）裂缝宽度计算结果的不同。荷载越大、混凝土保护层越小、截面尺寸越大,计算结果相差越大。一般情况下,《水工混凝土结构设计规范》（SL191—2008）与《混凝土结构设计规范》（GB50010—2010）计算的裂缝宽度相比大10%～70%。%＂Code for Design of Concrete Structures＂（GB50010-2010） has come into force since July 1st,2011.This paper introduces the main differences of crack widths calculated from ＂Design Code for Hydraulic Concrete Structures＂（SL191-2008） and ＂Code for Design of Concrete Structures＂（GB50010-2010） with the single-side reinforced rectangular beam and through the calculation and analysis of different conditions.The difference of the calculation results is larger when the load is bigger,the concrete cover is smaller and the cross section is larger.In general case,the calculated crack width would be increased 10%～70% by using ＂Design Code for Hydraulic Concrete Structures＂（SL191-2008） when compared with ＂Code for Design of Concrete Structures＂（GB50010-2010）.