Field Monitoring of Column Shortenings in a High-Rise Building during Construction

Abstract

The automatic monitoring of shortenings of vertical members in high-rise buildings under construction is a challenging issue in the high-rise building construction field. In this study, a practical system for monitoring column shortening in a high-rise building under construction is presented. The proposed monitoring system comprises the following components: (1) a wireless sensing system and (2) the corresponding monitoring software. The wireless sensing system comprises the sensors and energy-efficient wireless sensing units (sensor nodes, master nodes, and repeater nodes), which automate the processes for measuring the strains of vertical members and transmitting the measured data to the remote server. The monitoring software enables construction administrators to monitor real-time data collected by the server via an Internet connection. The proposed monitoring system is applied to actual 66-floor and 72-floor high-rise buildings under construction. The system enables automatic and real-time measurements of the shortening of vertical members, which can result in more precise construction.

Nghiên cứu quy trình thi công bù co cột nhà siêu cao tầng theo phương pháp bù co di chuyển tối ưu trong điều kiện Việt Nam

“…Công tác đo quan trắc co ngắn hiện trường được thực hiện ngay sau khi đổ bê tông cột của tầng đầu tiên và theo dõi thường xuyên liên tục trong suốt giai đoạn xây dựng và có thể cả trong quá trình sử dụng. Thu thập dữ liệu đo để đơn vị tư vấn thiết kế phân tích dự báo lại giá trị co ngắn trong giai đoạn xây dựng [12].…”

A Practical Monitoring System for the Structural Safety of Mega-Trusses Using Wireless Vibrating Wire Strain Gauges

“…The master node shown in Figure 3b [40,41] receives processed data from the sensor nodes through short-range wireless communication (ISM band) and transmits these data to the monitoring server through long-range (Code Division Multiple Access—CDMA, [42]) communication. Four sensor nodes can be connected to each master node with a four-port interface, which can simultaneously receive data from 16 VWSGs via sensor nodes.…”

Distributed fibre optic sensor system to measure the progressive axial shortening of a high-rise building during construction

“…However, due to the difficulty of installing and maintaining sensors, instrumentation of high-rise buildings to measure axial shortening is far from systematic. Some examples of such monitoring include the use of embedded vibrating wire strain gauges (VWSGs) at six levels of a 69-storey building [6]; VWSG-based wireless sensor nodes at two levels of a 66-storey and two levels of a 72storey building [7]; and fibre optic long-gauge strain sensors (SOFO) in the ground level of ten columns of a 19-storey building [8].…”