某市民服务中心配套餐饮楼结构加固设计分析

Analysis on structural reinforcement design of a supporting restaurant building in Citizen Service Center

响水县市民服务中心配套餐饮楼,结构体系为现浇钢筋混凝土框架。部分区域因二次装修致使建筑使用功能改变,实际使用荷载超出原设计预留,需进行结构加固。场地现状地面面层已部分施工完成,为减少返工损失,对加固方案进行优化调整,采用梁板顶面弯矩调幅的方式,仅对梁板底进行加固。本文通过计算分析,对梁板面弯矩调幅和非调幅两种方式的加固工程量进行比对,在确保结构安全前提下,尽可能优化结构加固方案。对比分析可知:通过梁板面弯矩调幅控制在15%以内,仅对梁、板底加固可大幅减少结构加固工程量;另外,悬挑梁因其静定结构的受力特征,不可进行弯矩调幅。同时比对了减小装修荷载的影响因素,通过计算可知,减少装修荷载对原结构框架梁、板等受弯构件有利,但作用有限,对原结构框架柱则可能出现不利情况。

The citizen service center in Xiangshui County is equipped with a dining facility that adopts a framework structure system.Due to changes in the building's use and function during renovation in certain areas,the load-bearing capacity exceeded the original design capacity,requiring structural reinforcement.The ground surface layer has been partially constructed,and in order to reduce rework losses,the reinforcement plan has been optimized and adjusted.The method of adjusting the bending moment on the top surface of the beam and slab is adopted,and only the bottom of the beam and slab is reinforced.This paper compares the reinforcement quantities of the two methods of beam and slab surface bending moment adjustment and non-adjustment,and optimizes the structural reinforcement plan as much as possible on the premise of ensuring structural safety.The comparative analysis shows that by controlling the beam and slab surface bending moment adjustment within 15%and only reinforcing the bottom of the beam and slab,the amount of structural reinforcement can be greatly reduced.In addition,cantilever beams cannot be subjected to bending moment adjustment due to their statically determinate structure.This paper also compares the factors affecting the reduction of decoration load,and the calculation shows that reducing the decoration load is beneficial to the bending members such as beams and slabs in the original structural frame,but its effect is limited and may have adverse effects on the original structural frame columns.