大跨房屋结构发展历史的力学主线  

The mechanical main line in the development history of large-span structures

作　　者：席根喜[1] 徐国彬[2] 

机构地区：[1]北方工业大学建筑工程学院,北京100043 [2]北京交通大学土建学院,北京100044

出　　处：《空间结构》2011年第4期39-42,47,共5页Spatial Structures

摘　　要：通过具体建筑结构实例,总结了建筑结构历史发展中各种结构的受力特征,归纳出了建筑结构历史发展过程中起重要控制作用的"力学主线"的概念,并且给出了各种建筑结构能够适应各种跨度的力学原理.从总体弯矩和局部(或构件)弯矩两个层次上论述了这条"力学主线"对于建筑结构能够相对应的合理跨度的影响,尤其对于大跨度结构的类型选择方面有一定的参考作用.运用这个"力学主线",设计人员可以更好地理解各种结构的受力特点,可以有意识地去判断建筑结构在结构方面的合理性,建造出跨度更大的结构,也有助于设计人员设计出既在建筑功能及美学上达到较高水平,也在建筑结构方面做到受力合理.受力合理的结构才能做到节省材料及费用,符合我国对建筑行业的产业政策的要求.This paper summarizes the internal force characteristics of various structures in the development history of construction structures through concrete construction structure examples, and inductively gives the concept of ＂mechanical main line＂, which has played a pivotal role in the development history of construction structures. It also introduces the mechanical principle that can be applied to construction structures that are suitable to various spans, and discusses the impact of this ＂mechanical line＂ on the corresponding optimal span of construction structures at both overall bending moment level and component bending moment level. Applying this ＂ mechanical main line＂, the designers can have a better understanding on the internal force characteristics of the structures, judge the structure rationality of construction structures, and create structures with larger span. Only rational structures can save material, lower cost, and meet the requirements of construction industry polices in our country.

关 键 词：建筑结构 大跨度结构 力学主线 整体弯矩 构件弯矩 

分 类 号：TU3[建筑科学—结构工程]