彩钢房及钢结构中的应力蒙皮效应是什么

天物彩板专注彩涂板行业17年——彩钢房及钢结构中的应力蒙皮效应是什么_彩钢房原材生产厂家请拨打网站上方电话咨询

由于屋面与屋檐檩条、屋脊檩条（及中檩条）连接牢固，墙体与墙梁连接牢固，檩条及墙梁与刚架构件连接牢固，屋面及墙体彩钢板可视为具有应力集肤效应的横隔板，将只能接受平面效应的单刚架连接成整体，从而提高刚架结构的整体刚度，有利于减小结构的实际位移。围护板的应力集肤效应极大地提高了冷弯薄壁型钢檩条/墙梁的整体稳定性，因此，角撑冷弯薄壁型钢檩条/墙梁系统可作为刚构构件受压翼缘的侧向支撑点。

GB50018-2002第4.1.10条：当选用非滑动连接件连接彩钢板及其支撑构件形成屋面和墙体围护体系时，单层房屋的规划可考虑受力蒙皮效应，但同时应满足以下要求：
1.蒙皮组件的强度和刚度参数应通过试验或可靠分析方法获得，并对结构进行分析和规划；
2.对于檩条、墙梁、柱及其连接处的关键部位，如山脊、檐口、山墙等，除了考虑荷载产生的内力的直接作用外，还需要考虑由所有分析计算的附加内力来进行承载力验算；
3.在已建建筑物的醒目位置设置永久性标志，表明彩钢板在使用和保护过程中不得随意拆除。彩钢板必须在临时支架设置完毕后才能拆除和更换，并在规划文件中做出规定。

GB50018-2002指出，现场实测表明，连接牢固的彩钢板围护结构体系的建筑物的承载力和刚度均大于按裸骨架计算的承载力和刚度。外壳系统在其自身平面内的抗剪能力加强了结构的整体运行功能，这种效应称为应力表皮效应或表皮效应。

Because the roof is firmly connected with the eaves purlin, ridge purlin (and middle purlin), the wall is firmly connected with the wall beam, and the purlin and wall beam are firmly connected with the rigid frame components, the color steel plate of the roof and wall can be regarded as the diaphragm with stress skin effect, connecting the single rigid frame that can only accept the plane effect into a whole, so as to improve the overall stiffness of the rigid frame structure, It is useful to reduce the practical displacement of the structure. The stress skin effect of the enclosure plate greatly improves the overall stability of the cold-formed thin-walled steel purlin / wall beam, so that the corner brace cold-formed thin-walled steel purlin / wall beam system can be used as the lateral support point of the compression flange of the rigid frame member.
Rule 4.1.10 of GB50018-2002: when the non sliding connector is selected to connect the color steel plate and its supporting components to form the enclosure system of roof and wall, the stressed skin effect can be considered in the planning of single-storey house, but the following requirements shall be satisfied at the same time:
1. The strength and stiffness parameters of the skin assembly shall be obtained by test or reliable analysis method, and the structure shall be analyzed and planned;
2. For purlins, wall beams, columns and their connections at key parts such as ridge, cornice and gable, in addition to considering the internal forces generated by the load of direct effect, it is also necessary to consider the additional internal forces calculated by all analysis for bearing capacity checking;
3. It is necessary to set up permanent signs in the conspicuous position of the built buildings to indicate that the color steel plates shall not be removed at will during the use and protection process. The color steel plates can be removed and replaced only after the temporary support is set, and rules shall be made in the planning documents.
GB50018-2002 points out that the field measurement shows that the bearing capacity and stiffness of buildings with firmly connected color steel plate enclosure system are greater than those calculated according to bare skeleton. The effect of the overall operation function of the structure strengthened by the shear capacity of the enclosure system in its own plane is called stressed skin effect, or skin effect.