- 摘 要
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（北京墨臣建筑設計事務所, 北京 100031）
［摘要］提出均載彈性矩形薄板最大正彎矩及負彎矩最大影響長度的簡捷算法，即縮小網(wǎng)片逼近法和縮小區(qū)間逼近零值點坐標法，闡述了上述兩種方法的計算原理。采用上述兩種方法對兩個算例進行了計算，并將計算結(jié)果與《建筑結(jié)構靜力計算手冊》的數(shù)據(jù)進行了對比。結(jié)果表明，上述兩種方法計算速度快、精度好，可在EXCEL上用VBA組織運算；對于三邊連續(xù)一長邊簡支板的Y向最大正彎矩Mymax以及三邊簡支一長邊連續(xù)板的Y向最大正彎矩Mymax，當長邊不斷延長時，其值并不在長連續(xù)邊中點對稱軸上而在對稱軸兩側(cè)某個對稱位置上。
［關鍵詞］均載； 彈性矩形薄板； 彎矩最大值； 彎矩影響長度
中圖分類號：TU318文獻標識碼：A文章編號：1002-848X(2019)02-0070-04
Simple and direct solution for calculating maximum positive bending moment and maximum influence length of negative bending momen of elastic rectangle slabs under uniform distributed loads
Zhao Yiqiang
(Beijing Mochen Architects & Engineers， Beijing 100031, China)
Abstract:A simple and direct solution for calculating maximum positive bending moment and maximum influence length of negative bending momen of elastic rectangle slabs under uniform distributed loads was proposed, i.e. the method of reducing mesh to approximate maximum value and the method of narrowing interval to approximate zero point large coordinate. The calculating principles of the above two methods were expounded. Two examples were calculated by the above two methods, and the results were compared with those of the Manual of static computation of building structures. The results show that the above two methods have quick calculation speed and good precision, and can be calculated by VBA on EXCEL. For Y-direction maximum positive bending moment Mymax of a slab with three continuously-supported edges and one simply-supported long edge and Y-direction maximum positive bending moment Mymax of a slab with one continuously-supported long edges and three simply-supported edges, these values are not on the symmetrical axis of the middle point of the continuous side, but at a symmetrical position on both sides of the symmetrical axis when the long edge is continuously extended.
Keywords:uniform distributed load; elastic rectangular slab; maximum moment; influence length of bending moment
作者簡介：趙毅強，碩士，教授級高級工程師，一級注冊結(jié)構工程師，Email:zhaoyiq@vip.sina.com。
